Journal articles: 'Gas/Oil Separation'

1

Yang, Lele, Jing Wang, Yong Ma, Sen Liu, Jun Tang, and Yongbing Zhu. "Oil-Water-Gas Three-Phase Separation in Multitube T-Junction Separators." Water 11, no. 12 (December 16, 2019): 2655. http://dx.doi.org/10.3390/w11122655.

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Multitube T-junctions can be used as an oil-water-gas pre-separator in the oil and gas industry. In this paper, the mixture model, coupled with the k-ε turbulent model, was applied for a simulation of the oil-water-gas three-phase flow characteristics in the multitube T-junction separator. The oil droplet size ranged from 1 to 4 mm. The water content ranged from 5% to 20% and the gas content from 3% to 25%. According to the phase separation results for different droplet sizes, it was found that, as the oil droplet size increased, the water content at the water outlet initially increased and then tended to be stable. Therefore, it was necessary to increase the oil droplet size through corresponding measures before flowing into the T-junction for separation. For the separator with an inner diameter of 50 mm, the oil content at the inlet had a great influence on the water-oil separation performance, and the water-oil separation performance was obviously improved as the oil content decreased. Owing to increased residence time, the oil content had little influence on the water-oil separation performance when the separator with an inner diameter of 100 mm was applied. Moreover, for the separator with an inner diameter of 100 mm, the oil content had little influence on the degassing effect, and more than 90% of the gas could be discharged from the gas outlet. The separation performance of the multitube T-junction separator became worse as the inlet gas content increased.

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Zhong, Xing Fu, Ying Xiang Wu, Song Mei Li, and Peng Ju Wei. "Investigation of Pipe Separation Technology in the Oilfield." Advanced Materials Research 616-618 (December 2012): 833–36. http://dx.doi.org/10.4028/www.scientific.net/amr.616-618.833.

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Crude oil separating is an important technological process in the petroleum industry. Pipe separation technology (PST) is a new kind of separating method in oil-water-gas separation. To compare with conventional gravity separators, the new separator based on PST is low weight, low cost, efficient and convenient to maintain. This paper introduces this new compact separator, technological process and performance test. The test results show that the compact separator has good separating effect. When the water-cut inlet is from 50% to 60%, and the mixture flow rate is from 40 t/hr to 100 t/hr, the water-cut in oil outlet is less than 5%, and the oil-cut in water is less than 100 mg/l.

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Yang, Xin, Jian Mei Feng, Yun Feng Chang, and Xue Yuan Peng. "Experimental Study of Oil-Gas Cyclone Separator Performance in Oil-Injection Compressor System." Advanced Materials Research 383-390 (November 2011): 6436–42. http://dx.doi.org/10.4028/www.scientific.net/amr.383-390.6436.

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Experimental study of the separation efficiency of oil-gas cyclone separator for oil-injection compressor system was conducted with the aim of understanding the separation process and identifying the main parameters affecting the separation efficiency. Malvern Particle Size analyzer was applied to analyze the separators’ performance. By simultaneously measuring the oil droplet size distribution and oil concentration upstream and downstream of the separators, the separation performance was assessed. The results of the study contribute to an optimized cyclone separator design.

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Wan, Chang Dong. "Numerical Simulation and Response Surface Optimization of Oil-Gas Separator." Advanced Materials Research 466-467 (February 2012): 396–99. http://dx.doi.org/10.4028/www.scientific.net/amr.466-467.396.

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CFD (computational fluid dynamics) is a good method for simulation of the oil-gas separator. When the volume concentration is less than 10%, the oil particle tracks can be simulated by DPM （Discrete Phase Model）. The results show that the separation efficiency is obviously affected by the diameter of separator air-outlet, the diameter of separator oil-outlet, and the angle of separator cone. But the quantified analysis on separation efficiency is difficultly brought forward by CFD. RSM (response surface methods) can help to identify factors influencing the responses by experiments. Finally, the optimum responses and design parameters will be obtained altogether.

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Rafikovna Ganieva, Guzel, and Putu Aunda Niradgnani. "Modernization of Two-Phase Oil and Gas Separator." Nexo Revista Científica 33, no. 02 (December 31, 2020): 616–22. http://dx.doi.org/10.5377/nexo.v33i02.10797.

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Separators play an important role in the basis of the technological scheme and field preparation of oil and gas. Separation is the process of oil separation from gas. Depending on the requirements for the feedstock, separators are distinguished according to the principle of operation and purpose. In this paper, the company "PT Pertamina EP Asset 3 Subang", Indonesia (Nirajani) is considered as an example. Dimensions, efficiency, reliability of equipment, capital and operating costs are the main indicators of separator work and productivity. "Subang PT Pertamina EP Asset 3 Subang" collection station has 3 horizontal two-phase separators (high pressure, low pressure and test separator). In 2020, it is planned to increase the extraction of raw materials. In this regard, the aim of this work is to modernize the existing two-phase horizontal separator operated at the field. To achieve this goal, it is necessary to study the design of the existing separator, and calculate its performance (Nirajani). After all the calculations, it is necessary to choose a separator suitable for performance. Modernization of the existing separator is economically feasible for this enterprise.

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Song, Xing Liang. "Research on Separation Efficiency for Oil/Gas Separator of Submersible Electrical Pump." Applied Mechanics and Materials 295-298 (February 2013): 3261–64. http://dx.doi.org/10.4028/www.scientific.net/amm.295-298.3261.

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The criteria equation was established by using dimensional analysis; through the method of field experiment measuring the flow parameters of two-phase-flow in the gas-separator in this paper, combining with the criteria equation and experiment data, the mathematical model, which can quantitatively describe the relation between separation efficiency and the gas fluid ratio by using numerical method, is established; and the relational plate is plotted between the separation efficiency and the separation time in the case of different gas fluid ratio, which can provide theoretical foundation for the optimization of the well production parameters and the geometric structure parameters of the oil/gas separator under the submersible electrical pump.

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Carvalho, A. J. G., D. C. Galindo, M. S. C. Tenório, and J. L. G. Marinho. "MODELING AND SIMULATION OF A HORIZONTAL THREE-PHASE SEPARATOR: INFLUENCE OF PHYSICOCHEMICAL PROPERTIES OF OIL." Brazilian Journal of Petroleum and Gas 14, no. 04 (January 7, 2021): 205–20. http://dx.doi.org/10.5419/bjpg2020-0016.

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Fluids produced from oil reservoirs typically contain oil, natural gas, water, sediments, in varying amounts, and contaminating gases. Considering that economic interest usually targets mostly oil and gas, primary processing is used to separate water/oil/gas, in addition to treating these phases. Therefore, the well stream should be processed as soon as possible after reaching the surface. Separator vessels are among the main equipment used at surface production facilities, being responsible for the separation of the produced phases. This work focuses on studying the fluid dynamic behavior in a horizontal three-phase separator. To accomplish this goal, we used the computer fluid dynamics software ANSYS CFX. First, we performed a detailed analysis of a “Standard Case” to understand in detail the entire separation process within the vessel. The results show the three phases through the simulation time, analyses of the separation efficiency, different fluids flow lines, pressure gradient inside the vessel, and effect of the diverter baffle. It also considers a variation of fluid flow at the inlet of the separator. These analyses include pictures of all cases studied. Afterwards, some parameters of the standard case were altered to evaluate its influence on fluid dynamics behavior and the functioning of the separator vessel. At last, we analyzed the influences of oil density and viscosity on the separation. The oil quality affects the primary separation directly, as the oil density and viscosity increase, for example, increases the drag between the fluids and decreases the rate of sedimentation, which stickles the separation process difficult. Two out of the three cases generated satisfactory results. The simulation with the heaviest oil presented the worse results.

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Zhao, Zhi Guo, and Wen Ming Yu. "Numerical Simulation of Internal Flow Field on Diesel Centrifugal Gas-Oil Separator Based on CFD." Applied Mechanics and Materials 373-375 (August 2013): 409–12. http://dx.doi.org/10.4028/www.scientific.net/amm.373-375.409.

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Aiming at the low efficiency problem of the traditional gas-oil separator, this paper put forward a centrifugal gas-oil separator. In order to identify out the interior fluid field character of centrifugal gas-oil separator, RANS equation, RNG k-ε model and discrete phase model was applied to simulate the interior fluid field character and separation efficiency of centrifugal gas-oil separator. The simulation results showed that the flow field in the disc clearance was mainly laminar flow, and the flow field at the import and export of the disc was turbulence. Meanwhile, the velocity and pressure of the interior fluid field were equably distributed, the velocity and pressure in the disc clearance fluctuate in a tight range along vertical direction, and decrease along horizontal direction, and the particles in the disc clearance were distributed uniformly. The separation efficiency was 96.6% and the results met the design requirements.

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9

Yang, Shu Ren, Cheng Chu Yue Fu, and Li Li Liu. "Multi-Cup Isoflux Gas Anchor Numerical Simulation of Oil-Water Separating." Applied Mechanics and Materials 444-445 (October 2013): 865–68. http://dx.doi.org/10.4028/www.scientific.net/amm.444-445.865.

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Gas anchor is also known as downhole oil and gas separator. It plays a role of separating the gas and oil before the fluid flows into the pump, thus to eliminate the influence of gas and improve pump efficiency. It can also extend the lifetime of the equipment and increase the oil well output. On the analysis of factors affecting the efficiency of gas anchor, I built 3D models in Gambit on the basis of the blueprint of multi-cup isoflux gas anchor. I used Fluent to calculate the multi-cup isoflux gas anchor separation of oil and gas with laminar flow model. Then I got the distribution of speed and pressure in the multi-cup isoflux gas anchor and derived the formula of local resistance ratio. Learned that on the application of the multi-cup isoflux gas anchor the pumping wells pump efficiency enhances on an average of more than 25%.

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10

Fu, Zhendong, Jianyin Miao, Qi Wu, and Hongyang Zheng. "Analytical Study on Gas-Oil Separation of a Heat Pump System under Lunar Gravity." Advances in Mechanical Engineering 12, no. 10 (October 2020): 168781402096640. http://dx.doi.org/10.1177/1687814020966408.

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A heat pump in the aerospace industry can significantly reduce the area of radiator by elevating the rejection temperature. Especially for a Lunar base, the heat pump can improve the heat rejection capability of the thermal control system to adapt the high-temperature environment. However, gravity on the Lunar (about 1/6 g) may have an adverse impact on a gas-oil separator of the heat pump, and solving this problem is the key for a heat pump used on Lunar base. At present, the gas-oil separator all based on gravity separation theories, the researches under low or micro gravity were blank. In this work, a gravity separation model based on a single-particle principle was built, and the effects of the vapor velocity, the oil droplet initial velocity, and the oil droplet diameter were investigated under normal gravity. Then the variations of the separation efficiency under Lunar gravity were discussed and the numerical calculation results showed that the separation efficiency was reduced when the vapor velocity or droplet initial velocity increased in a certain height of the separator whenever under normal or Lunar gravity. Particularly, the separation efficiency under Lunar gravity was reduced from 99% to 55% than it under normal gravity.

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11

Wang, Lingzi, Jianmei Feng, Shijing Xu, Xiang Gao, and Xueyuan Peng. "An experimental investigation of the oil film distribution in an oil–gas cyclone separator." Proceedings of the Institution of Mechanical Engineers, Part E: Journal of Process Mechanical Engineering 231, no. 1 (August 3, 2016): 14–25. http://dx.doi.org/10.1177/0954408916658319.

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The film flow behavior in an oil–gas cyclone separator was experimentally studied to improve the separation efficiency in terms of the effect of the oil film on the cylinder wall. The oil film flow pattern was captured using a high-speed camera, and the cylinder wall was divided into seven regions to analyze according to the different oil film flow patterns. Along the cyclone cylinder height, the central part of the cylinder was the main flow area, in which droplet–wall collisions and oil film splashing were severe. Additionally, the oil film’s distribution characteristics under inlet velocities of 14.0, 16.0, and 18.0 m/s were compared, and the results showed that more splashing oil droplets were generated under higher inlet velocity. Moreover, changing the structure of the central channel and outer cylinder slightly changed the oil film’s area and flow pattern but exhibited a weak effect on the oil film thickness and re-entrainment. Then, an improved structure was proposed by adding a porous cylinder to the outer cyclone to avoid the generation of small splashing droplets from the oil film. The performance of the modified separator was measured in a real oil-injected compressor system, which demonstrated higher separation efficiency with no increase in static pressure loss. The separation efficiency increased by up to 2.7%, while the pressure loss decreased by up to 10%. Thus, the improved structure can improve the performance of oil–gas separators by changing the distribution and thickness of the oil film on the cylinder wall.

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12

Wang, Fei, Liang Zhao, Peng He, and Xue Zeng Zhao. "Effect of Temperature on Oil-Gas Separation in Membrane Separation Based Transformer On-Line Monitoring." Advanced Materials Research 211-212 (February 2011): 389–94. http://dx.doi.org/10.4028/www.scientific.net/amr.211-212.389.

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In the same conditions, the transformer on-line monitoring and off-line chromatographic analysis should be consistent, but the actual on-line monitoring is effected by the ambient temperature to make it is different from the off-line chromatographic measurement. this paper analyzes the theory of oil-gas separation, and develops a gas-oil separation test platform first, conducts an experiment about the changes of temperature based on the device, and then compares with the data of off-line measurement, gets the law of temperature affection on the oil-gas separation process, Finally gives the reason of influence of ambient temperature on oil-gas separation in on-line monitoring.

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13

Kokal, Sunil L., and Abdullah Ghamdi. "Performance Appraisals of Gas/Oil Separation Plants." SPE Production & Operations 23, no. 02 (May 1, 2008): 287–96. http://dx.doi.org/10.2118/102854-pa.

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14

Sutherland, Ken. "Separation processes in oil and gas extraction." Filtration + Separation 49, no. 1 (January 2012): 20–25. http://dx.doi.org/10.1016/s0015-1882(12)70054-x.

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15

Carpenter, Chris. "Method Quantifies Separator-Oil Shrinkage." Journal of Petroleum Technology 72, no. 12 (December 1, 2020): 48–49. http://dx.doi.org/10.2118/1220-0048-jpt.

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This article, written by JPT Technology Editor Chris Carpenter, contains highlights of paper IPTC 19775, “Quantifying Separator-Oil Shrinkage,” by Mathias Lia Carlsen, SPE, and Curtis Hays Whitson, SPE, Whitson, prepared for the 2020 International Petroleum Technology Conference, Dhahran, Saudi Arabia, 13-15 January. The paper has not been peer reviewed. Copyright 2020 International Petroleum Technology Conference. Reproduced by permission. In tight unconventionals, oil and gas rates often are measured daily at separator conditions. Consequently, converting these rates reliably to volumes at standard conditions is necessary in cases where direct stock-tank measurements are not available. Because of changes in producing-wellstream compositions and separator conditions, the separator-oil shrinkage factor (SF) can change significantly over time. The complete paper presents a rigorous and consistent method to convert daily separator rates into stock-tank volumes. Recommendations for developing field-specific shrinkage correlations using field test data also are proposed. SF and Flash Factor (FF) Separator-Oil SF. Separator-oil SF is the fraction of metered separator oil rate that remains (or transforms into) stock-tank oil after further processing to standard conditions of 1 atm and 60°F. Put simply, the SF quantifies the decrease in oil volume from separator conditions to stock tank. The magnitude can range from less than 0.65 to 0.99. Separator-Oil FF. Separator-oil FF is the ratio of liberated gas from metered separator oil after further processing to standard conditions of 1 atm and 60°F. The FF accounts for the increase in gas volume from separator conditions to stock tank and explains why oil is shrinking (i.e., gas is coming out of the solution). The magnitude of the FF can range from 5 to 1,000 scf/STB. Total producing gas/oil ratio (GOR) can be calculated easily when SF and FF are known. An SF always is associated with an FF and is literally the solution GOR of the separator oil. Both SF and FF are a function of the top-side surface process and an associated wellstream composition. Surface Process. The surface process represents the number of topside separation stages and the associated separator pressure and temperature of each stage. In shale basins, two- and three-stage separation trains are common. The number of separation stages typically is fixed throughout the lifetime of a well. However, the separator temperature and pressure may vary significantly. Wellstream Composition. The well-stream composition quantifies the relative amounts of different components flowing out of a well at a given day. This measurement is typically expressed in mol%. Tight unconventional basins contain many kinds of in-situ reservoir fluid compositions from dry gas to black oils. The produced-wellstream compositions from these systems tend to change considerably with time because of producing flowing bottomhole pressures below the saturation pressure, as seen in the field example presented in Fig. 1. In the figure, the shut-in period after approximately 330 days results in a transient period with large compositional changes.

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Khamukhin, Alexander A., and Eugenii V. Nikolayev. "Modeling of Gas Multistage Separation to Increase Stock Tank Oil." Advanced Materials Research 1040 (September 2014): 508–12. http://dx.doi.org/10.4028/www.scientific.net/amr.1040.508.

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The study gas multistage separation at the preliminary preparation of crude oil by means of computer simulation was performed. Different models have been used as the phase state equations in HYSYS software: Peng-Robinson, Grayson-Street-Choa-Seeder, Peng-Robinson-Twu, Suave-Redlich-Kwong, Twu-Sim-Tassone. The carry-over saving of liquid oil components into off gases approximately is 40–60% while optimizing thermobaric conditions of the separation was obtained. The semi-empirical model obtained on the basis statistical processing of the results of laboratory experiments was proposed. The proposed semi-empirical model has a slight deviation for the first and the second separators. There is a negative effect in the third separator, but it is not significant in comparison with the positive effect in the first and the second separators.

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Li, Yong, Junrong Wang, Hui Ji, Ouyang Li, and Songlin Nie. "Numerical Simulation Analysis of Main Structural Parameters of Hydrocyclones on Oil-Gas Separation Effect." Processes 8, no. 12 (December 9, 2020): 1624. http://dx.doi.org/10.3390/pr8121624.

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Gas pollution in marine lubricating oil systems is harmful to the normal operation of a ship, and is one of the main reasons for the decline of the performance of lubricating oil. In this research, a classic 75 mm hydrocyclone was selected as the oil–gas separation device. A hydrocyclone is a device that uses the density difference of the two-phase flow to separate the dispersed phase in the centrifugal force field. Compared with ordinary active oil–gas separators, hydrocyclones do not require additional power devices. After establishing the physical model of the hydrocyclone, the distribution characteristics of the flow field and oil–gas two-phase flow separation performance of the hydrocyclone were studied using computational fluid dynamics (CFD) technology. The influence of vortex finder diameter, vortex finder length, spigot diameter, cylindrical-part length, and cone angle on the oil–gas separation performance of the hydrocyclone were investigated. It was found that the vortex finder diameter and the spigot diameter have a significant influence on the oil–gas separation performance, whereas the vortex finder length, the cylindrical-part length, and the cone angle have little influence on its performance. Increasing the vortex finder diameter and reducing the spigot diameter can improve the gas separation efficiency. However, the liquid outflow from the vortex finder increases, which causes the liquid loss rate to increase. The presented research could lay a foundation for the optimal design of a hydrocyclone used for oil–gas separation of a marine lubricating oil system.

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Schei, Tor S., Peter Singstad, and Aage J. Thunem. "Transient Simulations of Gas-Oil-Water Separation Plants." Modeling, Identification and Control: A Norwegian Research Bulletin 12, no. 1 (1991): 27–46. http://dx.doi.org/10.4173/mic.1991.1.3.

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19

Karimi, Mohammad Bagher, Ghader Khanbabaei, and Gity Mir Mohamad Sadeghi. "Vegetable oil-based polyurethane membrane for gas separation." Journal of Membrane Science 527 (April 2017): 198–206. http://dx.doi.org/10.1016/j.memsci.2016.12.008.

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Yoshimura, Yoshihisa, Hiroaki Habaki, and Ryuichi Egashira. "Separation of Coker Gas Oil by Solvent Extraction." JOURNAL OF CHEMICAL ENGINEERING OF JAPAN 46, no. 9 (2013): 609–15. http://dx.doi.org/10.1252/jcej.13we048.

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Chen, Wei Gen, and Mai Hao. "Research on the Oil-Gas Permeability of Mixed Hollow Fiber Membrane Made by PTFE and PHFP." Advanced Materials Research 194-196 (February 2011): 2480–86. http://dx.doi.org/10.4028/www.scientific.net/amr.194-196.2480.

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Power transformer on-line monitoring on dissolved gas in oil is one of the effective and technical means to achieve the transformer state detection and fault diagnosis, and oil-gas permeability is one of the core technologies to implement transformer on-line monitoring. The traditional methods of oil-gas separation such as vacuum method and mechanical oscillation method were unable to satisfy the requirements of transformer on-line monitoring; and the methods which were used commonly in recent years, like dynamic headspace separation, corrugated tube, carrier gas elution etc, have a high rate of gas-separation and have already been used in some on-line monitoring products. However, the problems still exist: easy formation of oil pollution, so the oil can not be recycled and the device structure is relatively complex. This paper based on the separation principle of polymer membrane, proposes mixed hollow fiber membrane made by polytetrafluoroethylene (PTFE) and polyhexafluoropropylene (PHFP), and designs an oil-gas separation test platform formed by the storage tank, oil-gas permeability tank, temperature controller and gas chromatographic analyzer etc, does laboratory research on the oil-gas permeability of the mixed hollow fiber membrane at different temperatures. The results show that, the permeability of the mixed hollow fiber membrane is obviously better than the commonly used single fluoride film or rubber film, seven fault gases H2, CO, CO2, CH4, C2H6, C2H4, and C2H2 can be separated efficiently form transformer oil within 24 hours. More to the point, the equilibrium time is short, the gas permeability is high and the test platform structure is simple, all of these advantages provide a strong guarantee for the development of on-line monitoring technology on dissolved gas in transformer oil.

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Meng, Jian Jun, Yi Luo, Gang Yan, and Jian Mei Feng. "Numerical Simulation on the Effect of Inlet-Collision in Oil-Gas Separator Used for Air-Conditioning System." Applied Mechanics and Materials 448-453 (October 2013): 3378–81. http://dx.doi.org/10.4028/www.scientific.net/amm.448-453.3378.

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A three-dimensional steady-state numerical model of oil-gas separator with inlet-collision structure used in small-sized Variable Refrigerant Flow (VRF) system was established. RNG k-ε model was used in gas field and DRW model was chosen for oil droplets tracking. The influence of inlet-collision on velocity distribution, separation efficiency and pressure loss were studied. The results showed that the inlet-collision structure which had smaller radio of inner pipe length to cyclone bodys height could achieve the same separation efficiency as the no inlet-collision structure with bigger cyclone diameter. Higher separation performance could be obtained when the inlet-collision proportion was less than 26.57% and inlet velocity was about 24 m·s-1.

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Musaev, S. F. "On the practical results of implementation of coalessors in oil-gas preparation." Azerbaijan Oil Industry, no. 6-7 (July 15, 2021): 39–42. http://dx.doi.org/10.37474/0365-8554/2021-6-7-39-42.

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The paper deals with the issues of the implementation of coalessors for the separation of multi-phase fluids into particular phases during oil preparation for transportation. Various coalessors of liquid/liquid type (for separation of oil emulsions) and liquid/gas (for gas separation) have been analyzed. The results of the coalessor implementation are presented, the maximum sizes of water drops washed with oil flow estimated, the necessity of the consideration of gas compressibility rate during the evaluation of the sedimentation of mechanical particles marked.

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Zhang, Xiaobin, Xiaofeng Zhang, Delin Gu, Lei Lang, and Na Gao. "Numerical Study on the Influence of Length-Diameter Ratio on the Performance of Dynamic Pressure Oil-Air Separator." International Journal of Chemical Engineering 2021 (June 4, 2021): 1–16. http://dx.doi.org/10.1155/2021/6649128.

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In order to study the separation characteristics of the aeroengine dynamic pressure oil-air separator, this paper uses the coupling method of PBM and CFD two-fluid model to study the influencing factors such as cylinder diameter, cylinder length, and other factors on the separator performance. The flow field structure, velocity, gas volume distribution, separation efficiency, and gas and liquid holdup rate in the separator under different operating conditions are analyzed. Combined with the analysis results of the cylinder diameter and the cylinder length, the influence law of length-diameter ratio on separation efficiency is summarized. The optimum length-to-diameter ratio that maximizes the separation performance of the separator is obtained in this research, which provides a reference for the design and improvement of the separator. The results show that, as the diameter of the cylinder increases, the separation efficiency increases first and then decreases. When dsep = 16 mm and dsep = 18 mm, the separator reaches its maximum efficiency, which is about 93%. With the increase of the cylinder length, the separation efficiency first increases and reaches the maximum when l2 = 90 mm and then decreases slowly. When the separator cylinder is either too long or too short, it will cause the separation performance to decrease. There is an optimal aspect ratio. There is an optimal aspect ratio, and the separation performance of the separator is the best when the aspect ratio is between 5 and 6.

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Andreasen, Anders. "Applied Process Simulation-Driven Oil and Gas Separation Plant Optimization Using Surrogate Modeling and Evolutionary Algorithms." ChemEngineering 4, no. 1 (February 6, 2020): 11. http://dx.doi.org/10.3390/chemengineering4010011.

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In this article, the optimization of a realistic oil and gas separation plant has been studied. Using Latin Hypercube Sampling (LHS) and rigorous process simulations, surrogate models using Kriging have been established for selected model responses. The surrogate models are used in combination with an evolutionary algorithm for optimizing the operating profit, mainly by maximizing the recoverable oil production. A total of 10 variables representing pressure and temperature at various key places in the separation plant are optimized to maximize the operational profit. The optimization is bounded in the variables and a constraint function is included to ensure that the optimal solution allows export of oil with a Reid Vapor Pressure (RVP) < 12 psia. The main finding is that, while a high pressure is preferred in the first separation stage, apparently a unique optimal setting for the pressure in downstream separators does not appear to exist. In the second stage separator, apparently different, yet more or less equally optimal, settings are revealed. In the third and final separation stage a correlation between the separator pressure and the applied inlet temperature exists, where different combinations of pressure and temperature yields equally optimal results.

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Zhang, Xiaojun, Yun Cheng, Songlin Nie, Hui Ji, and Laiguo Liu. "Simulation of Multiphase Flow of the Oil-Water Separation in a Rotating Packed Bed for Oil Purification." Mathematical Problems in Engineering 2013 (2013): 1–9. http://dx.doi.org/10.1155/2013/404327.

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HIGEE (High Gravity Rotary Device) rotating oil purifier which consists of two parts: hydrocyclone separator and rotating packed bed (abbr. RPB) is considered to be capable of removing the solid particle contaminant, moisture and gas simultaneously. As the major unit of HIGEE, the RPB uses centrifugal force to intensify mass transfer. Because of the special structure of RPB, the hydraulic characteristics of the RPB are very important. In this study, the multiphase flow model in porous media of the RPB is presented, and the dynamical oil-water separation in the RPB is simulated using a commercial computational fluid dynamics code. The operating conditions and configuration on the hydraulic performance of the RPB are investigated. The results have indicated that the separation efficiency of HIGEE rotating oil purifier is predominantly affected by operating conditions and the configurations. The best inlet pressure is 0.002 MPa. When the liquid inlet is placed in the outside of the lower surface of RPB; oil outlet is placed in the upper surface, where it is near the rotation axis; and water outlet is placed in the middle of the RPB, where it is far away from the oil outlet, the separating efficiency is the best.

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Deeva, V. S., S. М. Slobodyan, and V. S. Teterin. "Optimization of Oil Particles Separation Disperser Parameters." Materials Science Forum 870 (September 2016): 677–82. http://dx.doi.org/10.4028/www.scientific.net/msf.870.677.

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Retaining structure of homogeneous fluid and granular stream is one of the main criteria for technological process assuring the high quality outcome in many industries, including mechanical engineering and oil & gas industry. For example, in oil and gas industry during the pipeline transportation of oils there is a strong trend for cluster aggregation, and particle coarsening and entanglement. Dehomogenization of particle stream results in reverse dynamics of the stream. The importance of prevention and minimization of small particles coalescence by separating the oil stream leads to the need of improving the properties of the dispersers to boost their efficiency. Our paper investigates the operating principle of the disperser for separating particles (separator), which is designed by the authors. We have considered a particle stream of dispersed structure. We have obtained the conformity with the stability of the disperser operation. To yield the results we use the extremum problems for differential equations. This approach provides strong evidence that there are optimum parameters of the dispersers, which result in better stability of the particle stream.

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Li, Yingwei, Jing Gao, Xingbin Liu, and Ronghua Xie. "Energy Demodulation Algorithm for Flow Velocity Measurement of Oil-Gas-Water Three-Phase Flow." Mathematical Problems in Engineering 2014 (2014): 1–13. http://dx.doi.org/10.1155/2014/705323.

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Flow velocity measurement was an important research of oil-gas-water three-phase flow parameter measurements. In order to satisfy the increasing demands for flow detection technology, the paper presented a gas-liquid phase flow velocity measurement method which was based on energy demodulation algorithm combing with time delay estimation technology. First, a gas-liquid phase separation method of oil-gas-water three-phase flow based on energy demodulation algorithm and blind signal separation technology was proposed. The separation of oil-gas-water three-phase signals which were sampled by conductance sensor performed well, so the gas-phase signal and the liquid-phase signal were obtained. Second, we used the time delay estimation technology to get the delay time of gas-phase signals and liquid-phase signals, respectively, and the gas-phase velocity and the liquid-phase velocity were derived. At last, the experiment was performed at oil-gas-water three-phase flow loop, and the results indicated that the measurement errors met the need of velocity measurement. So it provided a feasible method for gas-liquid phase velocity measurement of the oil-gas-water three-phase flow.

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Yang, Shu Ren, Di Xu, Chao Yu, Jia Wei Fan, and Cheng Chu Yue Fu. "Optimization Design for Oil-Water Separator of Injection-Production Technology in the same Well." Advanced Materials Research 803 (September 2013): 383–86. http://dx.doi.org/10.4028/www.scientific.net/amr.803.383.

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In order to solve the problem of high water cut wells in some oil field in Daqing that it could not get the large-scale application because of the bad separating effect of down hole centrifugal oil-water separator, we optimize the design of multi-cup uniform flux oil-water separator according to the similar separation principle of multi-cup uniform flux gas anchor, and it is obtained to achieve of injection-production technology in the same well which is of high water cut. The design concept of the separator is increasing the number of opening every layer and aperture gradually in subsection from up to down in the design process. The purpose is to get the close intake quantity of every orifice and guarantee the residence time is long enough in the separator, effectively shorten the length of down hole oil-water separator and reduce the production costs and operating costs.

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Chen, Fanghui, and Poojitha D. Yapa. "Modeling gas separation from a bent deepwater oil and gas jet/plume." Journal of Marine Systems 45, no. 3-4 (April 2004): 189–203. http://dx.doi.org/10.1016/j.jmarsys.2003.11.005.

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AL-Maliki, Madhi A. R. Swadi. "An investigation of the optimum separation conditions in the Degassing stations of one of southern Iraqi oil Field." Journal of Petroleum Research and Studies 9, no. 2 (June 23, 2019): 22–41. http://dx.doi.org/10.52716/jprs.v9i2.289.

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In field separation facilities operation, operators tend to determine the optimum conditions to maximize revenue. The object of this study is to investigate the present number of separation stages and their optimal conditions for degassing stations of oil Field. A computer program model was written to predict the optimal conditions for oil field gas-oil separation stations subject to a given crude oil composition , flow rate and feed temperature and pressure using flash calculations with modified Soave-Redlich-Kwong Equation of state. Nine Bottom-hole well samples of reservoir crude oil was collected and subjected to PVT analysis commonly performed on crude oil, Surface stage separators gas samples at steady condition were taken and analyzed by gas chromatography apparatus to determine the gas composition. A good agreement was found by comparing theoretical and experimental prediction for gas composition. The results indicate that the present five separation stages is the optimum number and the values obtained for these optimum stages pressure are (514.7,119.7,42.7,26.7,14.7 psig) for Summer and (464.7,119.7,42.7,26.7,14.7 Psig) for Winter where the current operation pressures are (614.7,119.7,42.7,26.7,14.7 psi) for Summer and Winter. The total liquid yields in stock tank reaches (1.29, 1.31 %) for summer and winter respectively and the stock tank API Gravity reaches (0.41, 0.42) for summer and winter respectively.

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Gao, C., M. Rivero, E. Nakagawa, and G. Sanchez. "DOWNHOLE SEPARATION TECHNOLOGY—PAST, PRESENT AND FUTURE." APPEA Journal 47, no. 1 (2007): 283. http://dx.doi.org/10.1071/aj06019.

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In the 1990s, a new water management tool, downhole separation technology, was developed. It separates oil and gas from produced water inside the wellbore and injects the produced water into the disposal zone. Based on the different fluid the separators handle, they are categorised as downhole oil-water separators (DOWS) and downhole gas-water separators (DGWS). Two types of separators have been used: hydrocyclone and gravity separators. The authors reviewed the previous 59 DOWS installations and 62 DGWS installations worldwide, and discovered that only about 60% achieved success. Some major issues—including high costs, low reliability and low longevity—have slowed down its industrial adoption. Based on the field experiences, a good candidate well must have a high-quality disposal zone with sustainable permeability. To improve the performance of downhole separation tools, it is crucial to better understand the behaviour of the separator under downhole conditions and the behaviour of the injection zone under the invasion of various impurities in the produced water.

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Gomes, Alvaro Luiz, and Felipe Nascimento. "A new water-based foam controller for gas/oil separation on crude oil." Rio Oil and Gas Expo and Conference 20, no. 2020 (December 1, 2020): 185–86. http://dx.doi.org/10.48072/2525-7579.rog.2020.185.

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Sklabinskyi, V. I., А. A. Liaposhchenko, O. V. Nastenko, and M. M. Al Rammahi. "Modeling and Design of Inertial – Filtering Gas Separators-Condensers for Compressor Units of Oil and Gas Industry." Applied Mechanics and Materials 630 (September 2014): 117–23. http://dx.doi.org/10.4028/www.scientific.net/amm.630.117.

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This article deals with a new method for natural gas purification from liquid drops - condensation separation method which is an alternative method as to traditionally used methods for this process organization. Authors present results of the research and models of separation process in the inertial-filtering separators-condensers used in the compressor plants of oil and gas industry.

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Liu, Xiaoying, Wenlin Ruan, Wei Wang, Xianming Zhang, Yunqi Liu, and Jingcheng Liu. "The Perspective and Challenge of Nanomaterials in Oil and Gas Wastewater Treatment." Molecules 26, no. 13 (June 28, 2021): 3945. http://dx.doi.org/10.3390/molecules26133945.

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Oil and gas wastewater refers to the waste stream produced in special production activities such as drilling and fracturing. This kind of wastewater has the following characteristics: high salinity, high chromaticity, toxic and harmful substances, poor biodegradability, and a difficulty to treat. Interestingly, nanomaterials show great potential in water treatment technology because of their small size, large surface area, and high surface energy. When nanotechnology is combined with membrane treatment materials, nanofiber membranes with a controllable pore size and high porosity can be prepared, which provides more possibilities for oil–water separation. In this review, the important applications of nanomaterials in wastewater treatment, including membrane separation technology and photocatalysis technology, are summarized. Membrane separation technology is mainly manifested in ultrafiltration (UF), nanofiltration (NF), and reverse osmosis (RO). It also focuses on the application of semiconductor photocatalysis technology induced by TiO2 in the degradation of oil and gas wastewater. Finally, the development trends of nanomaterials in oil and gas wastewater treatment are prospected.

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Scherbin, Sergey, Evgeniy Podoplelov, and Anatoliy Dement'ev. "TECHNOLOGICAL CALCULATION AND EVALUATION OF THE EFFECTIVENESS OF FLARE SEPARATOR HIGH-PRESSURE COMPRESSOR STATION OF THE SUZUN FIELD." Bulletin of the Angarsk State Technical University 1, no. 12 (December 18, 2018): 130–35. http://dx.doi.org/10.36629/2686-777x-2018-1-12-130-135.

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In the process design of flare separator high-pressure compressor station of the Suzun field to verify the specified performance parameters for gas and assess the effectiveness of the separation of liquid droplets from the gas. A new approach to determining the minimum diameter of liquid droplets corresponding to the gravitational deposition condition, which can be used in assessing the efficiency of oil and gas separators, is proposed.

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Hasanov, F. G., S. B. Bayramov, R. M. Hasanzade, A. B. Garayev, and N. Sh Amiraslanov. "Control of produced water with highly corrosive medium in oil-gas production." Azerbaijan Oil Industry, no. 1 (January 15, 2021): 24–27. http://dx.doi.org/10.37474/0365-8554/2021-1-24-27.

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The construction of middle oil-gathering facility, in which technological processes are managed in a closed medium is necessary for environmental protection to control highly corrosive medium in oil and gas production. Associated gas separated from the fluid in initial separation unit within middle oil-gathering facility enters gas-gathering point with low pressure, and the liquid - into the pig of oil, water and sand, which should be constructed from iron concrete for cleaning from mechanical impurities sediments and salt as well. The liquid charge from the separation unit and pig of oil, water and sand is based upon the law of communicating vessels. To supply long-life for reservoirs, the inner and outer walls should be covered with a special coating and additionally, electrochemical protection should be provided as well.

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Miao, Wang, and Sergiy Ryzhkov. "RESEARCH OF SEPARATION GRADIENT AEROSOL TECHNOLOGIES FOR INTENSIFICATION OF HEAT AND MASS TRANSFER PROCESSES IN SYSTEMS OF HIGHLY TURBULENT DISPERSED BIPHASIC FLOWS. EMPLOYING THE SEPARATION GRADIENT AEROSOL TECHNOLOGIES FOR DESIGNING THE OIL SEPARATORS OF VENTING SYSTEMS IN GAS TURBINE ENGINES (G=200 m3/h)." Science Journal Innovation Technologies Transfer, no. 2019-3 (July 7, 2019): 75–84. http://dx.doi.org/10.36381/iamsti.3.2019.75-84.

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The aim of present study was to design an oil separator for the venting systems of gas turbine engines at consumption of gaseous medium 200 m3/h. In order to accomplish the objective, we applied separation gradient aerosol technologies, which consider all the forces and effects that influence deposition of the highly dispersed particles. A scientific base is substantiated for the intensification of gradient processes of the transfer of aerosol media in the boundary layers of multifunctional surfaces in the purification of dispersed polyphase flows for developing the technical devices that ensure an increase in energy saving and ecological improvement of power plants. We designed a section-by-section structural scheme and a three-dimensional model of the oil separator in finite elements for the calculation of hydrodynamics and separation. The calculations were conducted of the hydrodynamic situation and particle trajectory in the flow area of an oil separator. Using the calculated distribution of speed in the oil separator at G=100…200 m3/h, it was determined that velocity in the coagulation profile does not exceed 10 m/s. It was established according to the results of static pressure distribution for G=100, 200 m3/h that the pressure differential in the separation coagulators reaches 2.5…3.9 kPa, respectively. Results of the calculation at G=100…200 m3/h demonstrated that the summary pulsation effect from the deposition of highly dispersed particles amounts to 25.1 %. Based on the calculations, we designed the prototype of an oil separator and tested it experimentally on the test bench in the form of an open type wind tunnel. Coefficient of the total effectiveness of purification was determined, which reaches 99.9 %. The modernization of purifiers for capturing the aerosols in different systems of power plants is possible based on the separation gradient aerosol technologies. The studies conducted make it possible to develop in the future a range of separators for gas consumption from 20 to 2000 m3/h.

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Robinson, David. "Oil and gas: Water treatment in oil and gas production – does it matter?" Filtration & Separation 47, no. 1 (January 2010): 14–18. http://dx.doi.org/10.1016/s0015-1882(10)70032-x.

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Blaško, Jaroslav, Robert Kubinec, Barbora Husová, Petr Přikryl, Věra Pacáková, Karel Štulík, and Janka Hradilová. "Gas chromatography/mass spectrometry of oils and oil binders in paintings." Journal of Separation Science 31, no. 6-7 (February 27, 2008): 1067–73. http://dx.doi.org/10.1002/jssc.200700449.

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ØSTERGAARD, K. K., B. TOHIDI, A. DANESH, R. W. BURGASS, A. C. TODD, and T. BAXTER. "A Novel Approach for Oil and Gas Separation by Using Gas Hydrate Technology." Annals of the New York Academy of Sciences 912, no. 1 (January 25, 2006): 832–42. http://dx.doi.org/10.1111/j.1749-6632.2000.tb06837.x.

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42

Ofuchi, César Y., Henrique K. Eidt, Carolina C. Rodrigues, Eduardo N. Dos Santos, Paulo H. D. Dos Santos, Marco J. Da Silva, Flávio Neves, Paulo Vinicius S. R. Domingos, and Rigoberto E. M. Morales. "Multiple Wire-Mesh Sensors Applied to the Characterization of Two-Phase Flow inside a Cyclonic Flow Distribution System." Sensors 19, no. 1 (January 7, 2019): 193. http://dx.doi.org/10.3390/s19010193.

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Wire-mesh sensors are used to determine the phase fraction of gas–liquid two-phase flow in many industrial applications. In this paper, we report the use of the sensor to study the flow behavior inside an offshore oil and gas industry device for subsea phase separation. The study focused on the behavior of gas–liquid slug flow inside a flow distribution device with four outlets, which is part of the subsea phase separator system. The void fraction profile and the flow symmetry across the outlets were investigated using tomographic wire-mesh sensors and a camera. Results showed an ascendant liquid film in the cyclonic chamber with the gas phase at the center of the pipe generating a symmetrical flow. Dispersed bubbles coalesced into a gas vortex due to the centrifugal force inside the cyclonic chamber. The behavior favored the separation of smaller bubbles from the liquid bulk, which was an important parameter for gas-liquid separator sizing. The void fraction analysis of the outlets showed an even flow distribution with less than 10% difference, which was a satisfactorily result that may contribute to a reduction on the subsea gas–liquid separators size. From the outcomes of this study, detailed information regarding this type of flow distribution system was extracted. Thereby, wire-mesh sensors were successfully applied to investigate a new type of equipment for the offshore oil and gas industry.

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Ijeomah, G., F. Samsuri, F. Obite, and M. A. Zawawi. "Application of Nanotechnology in Oil and Gas Industry: Towards Enhanced Oil and Gas Recovery." International Journal of Engineering Technology and Sciences 5, no. 3 (December 27, 2018): 35–50. http://dx.doi.org/10.15282/ijets.v5i3.1128.

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The global oil demand and the development of advanced techniques have made the regeneration of previously abandoned oilwells economically attractive. As conventional oil recovery methods near their economic limits, a revolutionary new technology is required to harness maximum oil from these stranded oilwells. Due to its potential to manipulate matter at molecular level, nanotechnology promises to dramatically transform oil and gas industry by enabling enhanced oil and gas recovery. Recently, there has been increasing research interest in the applications of nanotechnology in enhanced oil and gas recovery, where the unique aspects of reservoir management, drilling, production, processing and refinery are redesign. Nanotechnology has the potential to revolutionize the drilling process and accelerate the production of oil and gas by providing a platform that makes their separation in the reservoir more amenable. Nanotechnology can make the industry greener by drastically reducing the oil’s carbon footprint in contrast to oils obtained from conventional methods. In this paper, we review the latest trends in the applications of nanotechnology for enhanced oil and gas recovery. We further present scientific advance and new insight into possible future applications. The paper aims to broaden our understanding of the applications landscape of nanotechnology in oil and gas industry.

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Zhang, Chunwei, Menglong Sheng, Yaoqiang Hu, Ye Yuan, Yulong Kang, Xiao Sun, Tao Wang, Qinghua Li, Xisen Zhao, and Zhi Wang. "Efficient Facilitated Transport Polymer Membrane for CO2/CH4 Separation from Oilfield Associated Gas." Membranes 11, no. 2 (February 7, 2021): 118. http://dx.doi.org/10.3390/membranes11020118.

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CO2 enhanced oil recovery (CO2-EOR) technology is a competitive strategy to improve oil field economic returns and reduce greenhouse gas emissions. However, the arbitrary emissions or combustion of the associated gas, which mainly consists of CO2 and CH4, will cause the aggravation of the greenhouse effect and a huge waste of resources. In this paper, the high-performance facilitated transport multilayer composite membrane for CO2/CH4 separation was prepared by individually adjusting the membrane structure of each layer. The effect of test conditions on the CO2/CH4 separation performance was systematically investigated. The membrane exhibits high CO2 permeance of 3.451 × 10−7 mol·m−2·s−1·Pa−1 and CO2/CH4 selectivity of 62 at 298 K and 0.15 MPa feed gas pressure. The cost analysis was investigated by simulating the two-stage system. When the recovery rate and purity of CH4 are 98%, the minimum specific cost of separating CO2/CH4 (45/55 vol%) can be reduced to 0.046 $·Nm−3 CH4. The excellent short-to-mid-term stability indicates the great potential of large industrial application in the CH4 recovery and CO2 reinjection from oilfield associated gas.

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Al-Ghamdi, Abdullah M., Christine Noïk, Christine S. H. Dalmazzone, and Sunil L. Kokal. "Experimental Investigation of Emulsion Stability in Gas/Oil Separation Plants." SPE Journal 14, no. 04 (December 1, 2009): 595–605. http://dx.doi.org/10.2118/109888-pa.

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Saththasivam, Jayaprakash, Kavithaa Loganathan, and Sarper Sarp. "An overview of oil–water separation using gas flotation systems." Chemosphere 144 (February 2016): 671–80. http://dx.doi.org/10.1016/j.chemosphere.2015.08.087.

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Shervani, Suboohi, Jingjing Ling, Jiabin Liu, and Tahir Husain. "Self-Cleaning Nanoscale Coating for the Separation of Oil–Water Mixture." Coatings 9, no. 12 (December 15, 2019): 860. http://dx.doi.org/10.3390/coatings9120860.

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The current study pertains to the self-cleaning nanoscale coating of graphene/polymer nanohybrid system for the separation of oil–water mixture. Using a single nanohybrid system, we have developed a two-stage process for the selective removal of the hydrocarbons. Total petroleum hydrocarbons (TPHs) and separation efficiency are determined by gas chromatography-flame ionization detector (GC-FID). Analysis of the polycyclic aromatic hydrocarbons (PAHs) in the two stage samples is carried out by using gas chromatography coupled to mass spectrometry (GC-MS). The analysis shows the reduction in TPHs from 290 ppm to less than 1 ppm and more than 99.5% separation efficiency (oil removal from oil–water mixture) is achieved. No polycyclic aromatic hydrocarbons (PAHs) were detected in the treated water.

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Gajec, Monika, Ewa Kukulska-Zając, and Anna Król. "Optimization of Silver Nanoparticle Separation Method from Drilling Waste Matrices." Energies 14, no. 7 (April 1, 2021): 1950. http://dx.doi.org/10.3390/en14071950.

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Significant amounts of produced water, spent drilling fluid, and drill cuttings, which differ in composition and characteristics in each drilling operation, are generated in the oil and gas industry. Moreover, the oil and gas industry faces many technological development challenges to guarantee a safe and clean environment and to meet strict environmental standards in the field of processing and disposal of drilling waste. Due to increasing application of nanomaterials in the oil and gas industry, drilling wastes may also contain nanometer-scale materials. It is therefore necessary to characterize drilling waste in terms of nanomaterial content and to optimize effective methods for their determination, including a key separation step. The purpose of this study is to select the appropriate method of separation and pre-concentration of silver nanoparticles (AgNPs) from drilling wastewater samples and to determine their size distribution along with the state of aggregation using single-particle inductively coupled plasma mass spectrometry (spICP-MS). Two AgNP separation methods were compared: centrifugation and cloud point extraction. The first known use of spICP-MS for drilling waste matrices following mentioned separation methods is presented.

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Moosai, Roshni, and Richard A. Dawe. "Gas attachment of oil droplets for gas flotation for oily wastewater cleanup." Separation and Purification Technology 33, no. 3 (November 2003): 303–14. http://dx.doi.org/10.1016/s1383-5866(03)00091-1.

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Zuo, H. L., F. Q. Yang, X. M. Zhang, and Z. N. Xia. "Separation ofcis- andtrans-Asarone fromAcorus tatarinowiiby Preparative Gas Chromatography." Journal of Analytical Methods in Chemistry 2012 (2012): 1–5. http://dx.doi.org/10.1155/2012/402081.

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A preparative gas chromatography (pGC) method was developed for the separation of isomers (cis- andtrans-asarone) from essential oil ofAcorus tatarinowii. The oil was primarily fractionated by silica gel chromatography using different ratios of petroleum ether and ethyl acetate as gradient elution solvents. And then the fraction that contains mixture of the isomers was further separated by pGC. The compounds were separated on a stainless steel column packed with 10% OV-101 (3 m × 6 mm, i.d.), and then the effluent was split into two gas flows. One percent of the effluent passed to the flame ionization detector (FID) for detection and the remaining 99% was directed to the fraction collector. Two isomers were collected after 90 single injections (5 uL) with the yield of 178 mg and 82 mg, respectively. Furthermore, the structures of the obtained compounds were identified ascis- andtrans-asarone by1H- and13C-NMR spectra, respectively.

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Journal articles on the topic 'Gas/Oil Separation'

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