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Articoli di riviste sul tema "Rocks Permeability"

Autore: Grafiati

Pubblicato: 4 giugno 2021

Ultima modifica: 25 gennaio 2023

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1

Scott, Samuel W., and Thomas Driesner. "Permeability Changes Resulting from Quartz Precipitation and Dissolution around Upper Crustal Intrusions." Geofluids 2018 (July 31, 2018): 1–19. http://dx.doi.org/10.1155/2018/6957306.

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It has long been recognized that quartz precipitation from circulating hydrothermal fluids may reduce porosity and permeability near intrusions. However, the magnitude of permeability changes and potential feedbacks between flow, heat transfer, and quartz precipitation/dissolution remain largely unquantified. Here, we present numerical simulations of fluid convection around upper crustal intrusions which explicitly incorporate the feedback between quartz solubility and rock permeability. As groundwater is heated to ~350°C, silica dissolves from the host rock, increasing porosity and permeabili

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2

Liu, Kouqi, and Mehdi Ostadhassan. "Estimation of the Permeability of Rock Samples Obtained from the Mercury Intrusion Method Using the New Fractal Method." Fractal and Fractional 6, no. 9 (August 24, 2022): 463. http://dx.doi.org/10.3390/fractalfract6090463.

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Rock permeability, defined as the ability of fluid to flow through the rocks, is one of the most important properties of rock. Many researchers have developed models to predict the permeability of rock from the porosity and pore size based on the mercury intrusion. However, these existing models still have some limitations. In this study, based on data regarding the fractal nature of the mercury intrusion of the rocks, we built a new model to predict the permeability of the rocks. In order to verify the new model, we extracted data regarding different kinds of samples from the literature and e

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3

Madiutomo, Nendaryono, Willy Hermawan, Weningsulistri, and Madya Pamungkas. "The effect of rock permeability value on groundwater influx in underground coal gasification reactor." IOP Conference Series: Earth and Environmental Science 882, no. 1 (November 1, 2021): 012054. http://dx.doi.org/10.1088/1755-1315/882/1/012054.

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Abstract Rock permeability value is one of the most significant rock’s physical properties that affect groundwater influx processes in underground coal gasification (UCG). This value of rock permeability (K), namely the vertical permeability of flanking rocks (Kv) and horizontal permeability of coal (Kh). The purpose of this study was to determine the extent of the influence of the value of rock permeability on the potential of groundwater influx. The effect of rock permeability on groundwater influx into the UCG gasification reactor cavity in the presence of thermal loads and mineral composit

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4

Cooke, Andy P., Quentin J. Fisher, Emma A. H. Michie, and Graham Yielding. "Permeability of carbonate fault rocks: a case study from Malta." Petroleum Geoscience 26, no. 3 (August 12, 2019): 418–33. http://dx.doi.org/10.1144/petgeo2019-055.

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The inherent heterogeneity of carbonate rocks suggests that carbonate-hosted fault zones are also likely to be heterogeneous. Coupled with a lack of host–fault petrophysical relationships, this makes the hydraulic behaviour of carbonate-hosted fault zones difficult to predict. Here we investigate the link between host rock and fault rock porosity, permeability and texture, by presenting data from series of host rock, damage zone and fault rock samples from normally faulted, shallowly buried limestones from Malta. Core plug X-ray tomography indicates that texturally heterogeneous host rocks lea

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5

Widarsono, Bambang. "IMBIBITION WATER-OIL RELATIVE PERMEABILITY: INTRODUCTION OF WETTABILITY STRENGTH FOR ENHANCING MODEL ROBUSTNESS." Scientific Contributions Oil and Gas 42, no. 1 (April 8, 2019): 1–8. http://dx.doi.org/10.29017/scog.42.1.395.

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Water-oil relative permeabilty information of hydrocarbon reservoir rocks plays important roles in various modeling activities related to reservoir modeling and production forecast. The imbibition relative permeability scheme - the process of concern in this study affects many dynamic processes in reservoir. Water flooding and water encroachment form aquifer to oil zone in the reservoir are two two examples which representation in reservoir model requires the data. This study uses the standard Corey relative permeability model as a tool to study and model imbibition relative permeability behav

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6

Winhausen, Lisa, Mohammadreza Jalali, and Florian Amann. "The pore pressure oscillation method as a proven tool for determining the hydraulic properties of low-permeability rocks." Safety of Nuclear Waste Disposal 1 (November 10, 2021): 301. http://dx.doi.org/10.5194/sand-1-301-2021.

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Abstract. In the context of selecting and designing a future repository site for nuclear waste, a proper understanding of the host rock's physical behavior is required. One of the fundamental characteristics is the hydraulic diffusivity of the host rock, i.e., the ratio between permeability and storativity. For low-permeability rocks, however, determination of these properties is technically challenging and often time consuming. Among various steady-state and transient methods, the pore pressure oscillation technique has been proven to be an advantageous method for the simultaneous measurement

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7

Lyu, XianZhou, Zenghui Zhao, Xiaojie Wang, and Weiming Wang. "Study on the Permeability of Weakly Cemented Sandstones." Geofluids 2019 (January 15, 2019): 1–14. http://dx.doi.org/10.1155/2019/8310128.

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Fractured rocks are a type of complex media that widely exist in various projects including energy, hydraulic, and underground space engineering, whose permeability properties are a hotspot in current rock mechanics domain. Aiming at investigating the seepage characteristics of the fracture surfaces in different rock strata, uniaxial compressive test and permeability test were performed on single-fracture homogenous and heterogeneous rocks. Specifically, rock’s physical and mechanical parameters were measured in uniaxial tests while the initial width of the single fracture was determined throu

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8

Xu, Tao, and Chun An Tang. "Modeling of Stress-Induced Permeability Evolution and Damage of Rock." Advanced Materials Research 33-37 (March 2008): 609–16. http://dx.doi.org/10.4028/www.scientific.net/amr.33-37.609.

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Rock permeability is important in civil and geo-hydraulic engineering, the mining and petroleum industries, and in environmental and engineering geology. In this paper, considering the mutual hydro-mechanical response between stress-induced permeability and damage, a coupled mathematical model for solid deformation and gas flow in the coal or rock was established and an attempt is made to investigate the rock permeability evolution, fracture patterns, and flow vectors in rock samples at the scale of usual laboratory samples as well as the relation between permeability and stress induced damage

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9

LV, WEIFENG, GUOLIANG YAN, YONGDONG LIU, XUEFENG LIU, DONGXING DU, and RONG WANG. "EFFECT OF FRACTAL FRACTURES ON PERMEABILITY IN THREE-DIMENSIONAL DIGITAL ROCKS." Fractals 27, no. 01 (February 2019): 1940015. http://dx.doi.org/10.1142/s0218348x19400152.

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The fracture has great impact on the flow behavior in fractured reservoirs. Fracture traces are usually self-similar and scale-independent, which makes the fractal theory become a powerful tool to characterize fracture. To obtain three-dimensional (3D) digital rocks reflecting the properties of fractured reservoirs, we first generate discrete fracture networks by stochastic modeling based on the fractal theory. These fracture networks are then added to the existing digital rocks of rock matrixes. We combine two low-permeable cores as rock matrixes with a group of discrete fracture networks wit

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10

Clauser, C. "Permeability of crystalline rocks." Eos, Transactions American Geophysical Union 73, no. 21 (1992): 233. http://dx.doi.org/10.1029/91eo00190.

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11

Shestopalov, V. M., and L. I. Petrenko. "FRACTURING AND PERMEABILITY OF CRYSTAL ROCKS AND THEIR FRACTURE ZONES, HYDROGEOLOGICAL ASPECT." Geological Journal, no. 2 (June 30, 2022): 46–70. http://dx.doi.org/10.30836/igs.1025-6814.2022.2.254153.

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Fractured rock aquifers are regarded as of particular scientific and practical interest because of their importance for underground water supply, energy storage and safety radioactive waste disposal. The study of fissure waters of crystalline rocks in the context of global warming to address issues of drinking water supply is highly relevant today. It has potential practical importance for the future.The sustainable use of groundwater in fractured rock aquifers requires a detailed knowledge of their hydraulic properties. The complexity of hydrogeological conditions in massive fractured rocks r

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12

Al-shajalee, Faaiz, Colin Wood, Quan Xie, and Ali Saeedi. "Effective Mechanisms to Relate Initial Rock Permeability to Outcome of Relative Permeability Modification." Energies 12, no. 24 (December 9, 2019): 4688. http://dx.doi.org/10.3390/en12244688.

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Excessive water production is becoming common in many gas reservoirs. Polymers have been used as relative permeability modifiers (RPM) to selectively reduce water production with minimum effect on the hydrocarbon phase. This manuscript reports the results of an experimental study where we examined the effect of initial rock permeability on the outcome of an RPM treatment for a gas/water system. The results show that in high-permeability rocks, the treatment may have no significant effect on either the water and gas relative permeabilities. In a moderate-permeability case, the treatment was fou

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13

Shynkarenko, A. "MODERN APPROACHES TO DETERMINE THE PERMEABILITY OF RESERVOIR ROCKS BASED ON THE RESULTS OF GEOPHYSICAL INVESTIGATIONS." Visnyk of Taras Shevchenko National University of Kyiv. Geology, no. 3 (82) (2018): 45–54. http://dx.doi.org/10.17721/1728-2713.82.06.

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Permeability of rock is its physical property that describes its ability to conduct fluids under the pressure gradient. This paper presents short description and analysis of methods for determination of permeability of oil and gas reservoirs. Permeability is a function of different parameters that leads to difficulties during its estimation. Investigations of the void space structure of rocks, their anisotropy etc.were carried out in order to take into account all factors that have an influence on the permeability. Reservoir conditions could also be modeled for that purpose. Methods for determ

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14

Arkin, Eldan, Takumi Mori, Ren Himeno, Atsushi Sainoki, and Akira Sato. "Analysis of the Permeability Change Resulting from Active Mineral Precipitation in Pores of Rocks by 3D-DEM." IOP Conference Series: Earth and Environmental Science 1124, no. 1 (January 1, 2023): 012067. http://dx.doi.org/10.1088/1755-1315/1124/1/012067.

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Abstract Carbon dioxide capture and storage (CCS) is a promising technique for reducing the concentration of CO2 in the atmosphere, and several million tons of CO2 are sequestered every year. The most important problem in CCS is ensuring aquifer safety. However, there is still room for improvement in the flow characteristics of aquifers to prevent CO2 leakage. To decrease the permeability of porous rocks, in this study, a method called ‘active mineral deposition’ was developed. In this method, some minerals are actively precipitated in aquifers, and the pores in the rock mass are closed by pre

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15

Shi, Di, Liping Li, Jianjun Liu, Mingyang Wu, Yishan Pan, and Jupeng Tang. "Effect of discrete fractures with or without roughness on seepage characteristics of fractured rocks." Physics of Fluids 34, no. 7 (July 2022): 073611. http://dx.doi.org/10.1063/5.0097025.

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This study proposes a new fractal permeability model for fractured rocks that comprehensively accounts for the geometric fracture characteristics and the fluid transport mechanism. Then, the permeability changes of fractured rocks are analyzed using discrete fracture networks (DFNs) with or without roughness and different geometry parameters in the DFN modeling and finite element simulation. The results show that the proposed permeability model well agrees with the experimental data, and the established DFN numerical model more realistically reflects the fracture network in fractured rocks. Fl

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16

Vlahou, I., and M. G. Worster. "Freeze fracturing of elastic porous media: a mathematical model." Proceedings of the Royal Society A: Mathematical, Physical and Engineering Sciences 471, no. 2175 (March 2015): 20140741. http://dx.doi.org/10.1098/rspa.2014.0741.

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We present a mathematical model of the fracturing of water-saturated rocks and other porous materials in cold climates. Ice growing inside porous rocks causes large pressures to develop that can significantly damage the rock. We study the growth of ice inside a penny-shaped cavity in a water-saturated porous rock and the consequent fracturing of the medium. Premelting of the ice against the rock, which results in thin films of unfrozen water forming between the ice and the rock, is one of the dominant processes of rock fracturing. We find that the fracture toughness of the rock, the size of pr

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17

Hou, Bingchang, Feng Sun, Shifeng Xue, and Xudong Zhang. "Experimental study on mechanical properties and porosity and permeability of rock in high temperature environment." Journal of Physics: Conference Series 2368, no. 1 (November 1, 2022): 012031. http://dx.doi.org/10.1088/1742-6596/2368/1/012031.

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In order to explore the mechanical characteristics and porosity and permeability parameter of three kinds of rock (sandstone, granite and limestone) in high temperature environment, conventional triaxial compression experiments and porosity and permeability tests were conducted on three kinds of rocks under 25°C, 300°C and 500°C. The experimental results show that the high temperature environment increases the development degree of microcracks and pore structures in sandstone and limestone. As the temperature rises, the interpenetration length of triaxial compression shear crack of sandstone d

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18

Duppa M.T, Ir Hakim. "SURFACE FLOW REDUCTION AT APUDDLE AREA BY POROUS RECHARGE." INTERNATIONAL JOURNAL OF MANAGEMENT & INFORMATION TECHNOLOGY 11, no. 3 (August 30, 2016): 2910–15. http://dx.doi.org/10.24297/ijmit.v11i3.5119.

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WaterloggingÂ occursÂ whenÂ rainÂ isÂ rainÂ waterÂ thatÂ gathered Â accumulation Â exceededÂ the rainageÂ capacityÂ ofÂ theÂ riverÂ and it is Â causedndue to the absenceÂ of absorption infiltration into the soil this the study aimed to assess the basic characteristics of the land area of inundation, (material volcanic rocks, and chunk) and infiltration capacity this research method is the study of soil mechanics laboratory experiments using soil samples from 2 nundation areas, areas not graceful and the samples of porous material and chunks of mountain rock (sand, cement, bricks) the result sh

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19

Kozhevnikov, Evgenii, Evgenii Riabokon, and Mikhail Turbakov. "A Model of Reservoir Permeability Evolution during Oil Production." Energies 14, no. 9 (May 8, 2021): 2695. http://dx.doi.org/10.3390/en14092695.

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In this paper, we present a mathematical model to predict the evolution of rock permeability depending on effective pressure during oil production. The model is based on the use of the results of well testing data from wells operating in the oil fields of the Perm–Solikamsk region in the north of the Volgo Ural oil and gas province. Dependences of the change in flow characteristics in the reservoir on the effective pressure were established. We performed a comparative assessment using permeability and effective pressure data that were normalized to dimensionless forms of k/ko and P/Po. The fac

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20

Cardona, Alejandro, and J. Carlos Santamarina. "Carbonate rocks: Matrix permeability estimation." AAPG Bulletin 103, no. 1 (January 2020): 131–44. http://dx.doi.org/10.1306/05021917345.

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21

Chen, Zhiwen, Honglin Liu, Chengyu Zhu, Shuqi Ma, Yinjian Hang, and Wenjie Luo. "Seepage Characteristics and Influencing Factors of Weakly Consolidated Rocks in Triaxial Compression Test under Mining-Induced Stress Path." Minerals 12, no. 12 (November 29, 2022): 1536. http://dx.doi.org/10.3390/min12121536.

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The rock of weakly consolidated coal measure strata has the characteristics of low mechanical strength and strong water sensitivity. Under the stress and seepage disturbance caused by coal seam mining, the surrounding rock structure is prone to instability, which leads to mine safety accidents and water resources loss. In order to master the mechanical response and permeability evolution law of weakly consolidated rock under the disturbance of coal seam mining, the specimens of Jurassic mudstone, sandy mudstone, and sandstone in the Ili mining area of China were collected, and a triaxial compr

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22

Mohamed, I. M. M., and H. A. A. Nasr-El-Din. "Fluid/Rock Interactions During CO2 Sequestration in Deep Saline Carbonate Aquifers: Laboratory and Modeling Studies." SPE Journal 18, no. 03 (April 22, 2013): 468–85. http://dx.doi.org/10.2118/151142-pa.

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Summary Carbon dioxide (CO2) injection in carbonate formations causes a reduction in the well injectivity caused by precipitation of the reaction products between CO2, rock, and brine. The precipitated material includes sulfate and carbonate scales. The homogeneity of the carbonate rock, in terms of mineralogy and rock structure, is an important factor that affects the behavior of permeability changes during CO2 injection. Limestone rocks that were tested in this study included homogeneous Pink Desert limestone and Austin chalk, which were mainly calcite; heterogeneous Silurian dolomite (compo

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23

Jahanbakhsh, Amir, Hamidreza Shahverdi, and Mehran Sohrabi. "Gas/Oil Relative Permeability Normalization: Effects of Permeability, Wettability, and Interfacial Tension." SPE Reservoir Evaluation & Engineering 19, no. 04 (March 22, 2016): 673–82. http://dx.doi.org/10.2118/170796-pa.

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Summary Relative permeabilities (kr) are crucial flow functions governing the fluid distribution within and production from petroleum reservoirs under various oil-recovery methods. To obtain these important reservoir parameters, conventionally, it is required to take rock samples from the reservoir and perform appropriate laboratory measurements. Although kr is expressed as a function of fluid saturation, it is now well-known that kr values are affected by pore structure and distribution, absolute permeability, wettability, interfacial tension (IFT), and saturation history. These rock/fluid pr

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24

Krykovskyi, Oleksandr, Viktoriia Krykovska, and Serhii Skipochka. "Interaction of rock-bolt supports while weak rock reinforcing by means of injection rock bolts." Mining of Mineral Deposits 15, no. 4 (December 2021): 8–14. http://dx.doi.org/10.33271/mining15.04.008.

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Purpose is to analyze changes in shape and dimensions of a rock mass area, fortified with the help of a polymer, depending upon the density of injection rock bolts as well as the value of initial permeability of enclosing rocks to substantiate optimum process solutions to support roofs within the unstable rocks and protect mine workings against water inflow and gas emission. Methods. Numerical modeling method for coupled processes of rock mass strain and filtration of liquid components of a polymer has been applied. The model is based upon fundamental ideas of mechanics of solids and filtratio

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25

Li, Hao, Zuliang Zhong, Kenneth Imo-Imo Eshiet, Yong Sheng, Xinrong Liu, and Dongmin Yang. "Experimental Investigation of the Permeability and Mechanical Behaviours of Chemically Corroded Limestone Under Different Unloading Conditions." Rock Mechanics and Rock Engineering 53, no. 4 (November 4, 2019): 1587–603. http://dx.doi.org/10.1007/s00603-019-01961-y.

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Abstract This paper investigates the mechanical properties and permeability of chemically corroded rock during deep underground tunneling. Nuclear magnetic resonance tests are carried out to quantify the chemical damage of limestone samples at the microscopic scale. Coupled hydrostatic pressure-unloading tests at different unloading rates are also conducted on these chemically corroded limestone samples to investigate permeability changes and chemical effects on mechanical behaviours. Magnetic resonance imaging, T2 spectrum distribution and porosity of the samples are obtained, and the chemica

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26

Al Hinai, Adnan, Reza Rezaee, Ali Saeedi, and Roland Lenormand. "Permeability prediction from mercury injection capillary pressure: an example from the Perth Basin, Western Australia." APPEA Journal 53, no. 1 (2013): 31. http://dx.doi.org/10.1071/aj12003.

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For shale gas reservoirs, permeability is one of the most important and difficult parameters to determine. Typical shale matrix permeabilities are in the range of 10 microdarcy–100 nanodarcy, and are heavily dependent on the presence of natural fractures for gas transmissibility. Permeability is a parameter used to measure the ability of a rock to convey fluid. It is directly related to porosity and depends on the pore geometry features, such as tortuosity, pore shape and pore connectivity. Consequently, rocks with similar porosity can exhibit different permeability. Generally, permeability is

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27

Leger, Marie, and Linda Luquot. "Importance of Microstructure in Carbonate Rocks: Laboratory and 3D-Imaging Petrophysical Characterization." Applied Sciences 11, no. 9 (April 22, 2021): 3784. http://dx.doi.org/10.3390/app11093784.

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Carbonate rocks are considered to be essential reservoirs for human development, but are known to be highly heterogeneous and difficult to fully characterize. To better understand carbonate systems, studying pore-scale is needed. For this purpose, three blocks of carbonate rocks (chalk, enthrocal limestone, and dolomite) were cored into 30 samples with diameters of 18 mm and lengths of 25 mm. They were characterized from pore to core scale with laboratory tools. These techniques, coupled with X-ray micro-tomography, enable us to quantify hydrodynamic properties (porosity, permeability), elasti

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Vyzhva, S., V. Onyshchuk, I. Onyshchuk, M. Reva, and O. Shabatura. "RESERVOIR FEATURES OF THE UPPER CARBON SEDIMENTS (RUNOVSHCHYNSKA AREA OF THE DNIEPER-DONETS BASIN)." Visnyk of Taras Shevchenko National University of Kyiv. Geology, no. 4 (83) (2018): 30–37. http://dx.doi.org/10.17721/1728-2713.83.04.

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The main objective of this article is to highlight the results of investigations of filtration capacity features of sandstones and argillites of the Upper Carbon rocks in Runovshchynska area of The Dnieper-Donets basin. The purpose of the research was to assess the promising rocks as possible hydrocarbon reservoirs. The following reservoir features of rock samples such as the open porosity factor, permeability coefficients and residual water saturation factor have been investigated. The correlation of rock density with their porosity was also studied. The porosity study was carried out in atmo

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Zhang, Jihua, Yun Dong, Yadong Chen, Yang Jiang, Huasheng Sun, Yuqing Fan, and Chun Wang. "Comparative Analysis of Roadway Reinforcement Effects Based on Fluid-Solid Coupling in the Fractured Zone of Water-Rich Fault." Advances in Civil Engineering 2018 (September 6, 2018): 1–14. http://dx.doi.org/10.1155/2018/6238910.

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Water inrush is a common geological disaster during the roadway excavation process in the broken zone of water-rich faults. In this paper, the 15107 mining roadway built by Yuxing coal mine in such a fault zone was used as a case study to determine the water content of the surrounding rocks and a fault zone using the transient electromagnetic method (TEM). Also, the mechanics characteristics of such rocks in both saturated and unsaturated states were analyzed, a computational model for fluid-solid coupling in the water-rich fault fracture zone was established, and the permeability coefficient

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Zhao, Ranlei, Xiao Xu, Wentao Ma, Cunlei Li, Qiushi Zhang, and Qingyou Yue. "Reservoir Characteristics and Controlling Factors of Sedimentary Pyroclastic Rocks in Deep-Buried Basins: A Case Study of Yingtai Fault Depression, Southern Songliao Basin." Energies 15, no. 18 (September 9, 2022): 6594. http://dx.doi.org/10.3390/en15186594.

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In this article, based on core description, thin section, scanning electron microscope (SEM), well logging and reservoir physical properties, the reservoir controlling factors of sedimentary pyroclastic rocks in deep-buried basins are assessed via the relation between reservoirs and defining factors, including lithological characteristics, sedimentary microfacies and diagenesis. In addition, the contributing factors of anomalously high-porosity and high-permeability zone are analyzed. The lithological characteristics and diagenesis of the sedimentary pyroclastic rocks are closely related to re

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Chen, Shikuo, Chenhui Wei, Tianhong Yang, Wancheng Zhu, Honglei Liu, and Pathegama Ranjith. "Three-Dimensional Numerical Investigation of Coupled Flow-Stress-Damage Failure Process in Heterogeneous Poroelastic Rocks." Energies 11, no. 8 (July 24, 2018): 1923. http://dx.doi.org/10.3390/en11081923.

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The failure mechanism of heterogeneous rocks (geological materials), especially under hydraulic conditions, is important in geological engineering. The coupled mechanism of flow-stress-damage should be determined for the stability of rock mass engineering under triaxial stress states. Based on poroelasticity and damage theory, a three-dimensional coupled model of the flow-stress-damage failure process is studied, focusing mainly on the coupled characteristics of permeability evolution and damage in nonhomogeneous rocks. The influences of numerous mesoscale mechanical and hydraulic properties,

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Lv, Zhaoxing, Qianqian Ji, and Weijie Ren. "Experimental Study and Percolation Analysis on Seepage Characteristics of Fractured Coal and Sandstone Based on Real-Time Micro-CT." Geofluids 2020 (November 5, 2020): 1–9. http://dx.doi.org/10.1155/2020/8832946.

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Sandstone and coal are the two most common types of reservoirs in nature. The permeability of sandstone in oil-bearing formations controls its oil and gas production; the permeability of the coal seam containing gas has a crucial influence on the gas drainage efficiency. One of the main factors affecting rock permeability is the spatial distribution and connectivity of pores and fissures in the rock. In this paper, a small-sized sample with a diameter of 5 mm and a height of 10 mm was used for the test. The rock samples under different stress states were scanned in real-time during the seepage

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Rasolofosaon, Patrick N. J., and Bernard E. Zinszner. "Comparison between permeability anisotropy and elasticity anisotropy of reservoir rocks." GEOPHYSICS 67, no. 1 (January 2002): 230–40. http://dx.doi.org/10.1190/1.1451647.

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We developed new experimental and theoretical tools for the measurement and the characterization of arbitrary elasticity tensors and permeability tensors in rocks. They include an experimental technique for the 3‐D visualization of hydraulic invasion fronts in rock samples by monitoring the injection of salt solutions by X‐ray tomography, and a technique for inverting the complete set of the six coefficients of the permeability tensor from invasion front images. In addition, a technique for measuring the complete set of the 21 elastic coefficients, a technique allowing the identification and t

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Sun, Zhong Chun, Zhong Hong Chen, Yu Hua Kong, Wen Liu, and Men Yun Yang. "The Physical Properties and their Prediction of Volcanic Reservoirs in Luxi Area of Junggar Basin, China." Advanced Materials Research 616-618 (December 2012): 228–33. http://dx.doi.org/10.4028/www.scientific.net/amr.616-618.228.

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The physical properties of reservoirs determine the ability on accumulating hydrocarbon. As one of the unconventional hydrocarbon reservoirs, the volcanics own the different characteristics from the clastic rocks on physical properties. The study on the relationship between physical and electrical properties of deep volcanic reservoirs was conducted, using the Luxi area of Junggar basin as an example. By our study, some conclusions have been made: The heterogeneity of physical properties is strong in volcanic rocks whose porosity and permeability vary in different lithology and lithofacies; di

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Zhou, Hui, Jian Fu Shao, Xia Ting Feng, and Da Wei Hu. "Coupling Analysis between Stress Induced Anisotropic Damage and Permeability Variation in Brittle Rocks." Key Engineering Materials 340-341 (June 2007): 1133–38. http://dx.doi.org/10.4028/www.scientific.net/kem.340-341.1133.

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In this paper, a coupling constitutive model is proposed for anisotropic damage and permeability variation in brittle rocks before cracks fully coalesce. In this coupling model, an anisotropic damage model is employed to perform the mechanical analysis, and a statistical penetration model is set up to describe the effective porosity and permeability evolution in brittle rocks. For the coupling analysis, anisotropic damage model offers statistical penetration model the crack length in various directions, and statistical penetration model inversely provides anisotropic damage model with permeabi

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36

Krogulec, Ewa, Katarzyna Sawicka, Sebastian Zabłocki, and Ewa Falkowska. "Mineralogy and Permeability of Gas and Oil Dolomite Reservoirs of the Zechstein Main Dolomite Basin in the Lubiatów Deposit (Poland)." Energies 13, no. 23 (December 5, 2020): 6436. http://dx.doi.org/10.3390/en13236436.

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Permeability characterizes the ability of rocks to store and transport natural gas, crude oil and reservoir fluids. Permeability heterogeneity of reservoir rocks, including dolomites, results from overlapping geological and physicochemical processes. The permeability study of gas-bearing dolomites was carried out on the Lubiatów hydrocarbon deposit (Poland), located at the Ca2 carbonate platform toe-of-slope, which is a prospective area for hydrocarbon exploration in Europe. Due to the complicated rock textures and overlapping alteration processes, including secondary crystallization or dissol

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37

Kurovets, S. S., and І. V. Artym. "Evaluation of the geological factors impact on capacity and filtration properties of terrigenuous reservoirs of the Pre-Carpathian foredeep." Scientific Bulletin of Ivano-Frankivsk National Technical University of Oil and Gas, no. 1(44) (May 5, 2018): 25–37. http://dx.doi.org/10.31471/1993-9965-2018-1(44)-25-37.

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The following main geological factors that determine the reservoir properties of the terrigenous rocks of the Pre-Carpathian foredeep were identified, namely: mineral composition, structural and texture features, and thermobaric factors. The mineral composition of the rock-forming minerals, the shape, the size of the fragmented grains and pores, their mutual placement, the type of fluid and the thermodynamic state determine the reservoir properties of terrigenous rocks. The best reservoirs are sandstones, compiled with larger and sorted grains. The increase of clay and carbonate material sharp

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38

Zeynaly-Andabily, E. M., and S. S. Rahman. "Measurement of permeability of tight rocks." Measurement Science and Technology 6, no. 10 (October 1, 1995): 1519–27. http://dx.doi.org/10.1088/0957-0233/6/10/012.

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39

Banks, David, Noelle E. Odling, Helge Skarphagen, and Erik Rohr-Torp. "Permeability and stress in crystalline rocks." Terra Nova 8, no. 3 (May 1996): 223–35. http://dx.doi.org/10.1111/j.1365-3121.1996.tb00751.x.

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40

Chi, Lu, and Zoya Heidari. "Directional-Permeability Assessment in Formations With Complex Pore Geometry With a New Nuclear-Magnetic-Resonance-Based Permeability Model." SPE Journal 21, no. 04 (August 15, 2016): 1436–49. http://dx.doi.org/10.2118/179734-pa.

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Summary This paper proposes a new method for directional-permeability assessment with nuclear-magnetic-resonance (NMR) measurements. Conventional techniques for permeability assessment from NMR measurements include empirical correlations such as SDR (Schlumberger-Doll-Research) and Coates models. However, carbonate rocks are known for lack of good correlations between pore-body-size and pore-throat-size, which makes it challenging and often unreliable to estimate permeability from NMR T2 (spin-spin relaxation time) distribution in carbonate formations with complex pore structure. It also was p

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41

Nababan, Benyamin Elilaski, Eliza Veronica Zanetta, Nahdah Novia, and Handoyo Handoyo. "ESTIMASI NILAI POROSITAS DAN PERMEABILITAS DENGAN PENDEKATAN DIGITAL ROCK PHYSICS (DRP) PADA SAMPEL BATUPASIR FORMASI NGRAYONG, CEKUNGAN JAWA TIMUR BAGIAN UTARA." Jurnal Geofisika Eksplorasi 5, no. 3 (January 17, 2020): 34–44. http://dx.doi.org/10.23960/jge.v5i3.34.

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Reservoir rock permeability and porosity are physical properties of rocks that control reservoir quality. Conventionally, rock porosity and permeability values are obtained from measurements in the laboratory or through well logs. At present, calculation of porosity and permeability can be calculated using digital image processing / Digital Rock Physics (DRP). Core data samples are processed by X-ray diffraction using CT-micro-tomography scan. The result is an image model of the core sample, 2D and 3D images. The combination of theoretical processing and digital images can be obtained from the

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42

Li, Bo, Lulu Zhang, Jianping Wei, and Yongjie Ren. "Pore Damage Properties and Permeability Change of Coal Caused by Freeze-Thaw Action of Liquid Nitrogen." Advances in Civil Engineering 2018 (October 2, 2018): 1–9. http://dx.doi.org/10.1155/2018/5076391.

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A laboratory test was conducted to investigate the effect of the freeze-thaw action of liquid nitrogen on the pore structure and permeability of coal rock. First, coal rock samples with similar sound velocities and permeabilities were selected. These samples were prepared in different water saturation levels and subjected to nuclear magnetic resonance (NMR) test before and after the freeze-thaw action. Furthermore, the freeze-thaw cycle of liquid nitrogen, freezing time, and water saturation of coal rocks were controlled in permeability test. Results showed that the pore diameter, porosity, an

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43

Popov, Nikita A., Ivan S. Putilov, Anastasiia A. Guliaeva, Ekaterina E. Vinokurova, and Iuliia V. Fairuzova. "THE INFLUENCE OF ROCK LITHOGENESIS TYPES ON POROSITY AND PERMEABILITY (THE CASE OF PERMOCARBONIFEROUS DEPOSIT OF THE USINSKOYE FIELD)." Вестник Пермского национального исследовательского политехнического университета. Геология. Нефтегазовое и горное дело 20, no. 2 (June 2020): 104–14. http://dx.doi.org/10.15593/2224-9923/2020.2.1.

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Abstract (sommario):

The paper analyzes a methodology aimed at differentiation of porosity, permeability and petrographic properties depending on facies attributes. Based on the Dunham classification, we offer in-depth studies of the influence of rock fabric, including full-size core samples, on changes in porosity and permeability. The work deals with the Permo-Carboniferous deposit of the Usinskoye field. Reservoir properties of the considered strata are highly heterogeneous. Along with highly porous and cavernous rocks, there are low porous and fractured varieties in the section, which refer to rocks of various

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44

Khimulia, V. V., and S. O. Barkov. "Analysis of changes in the internal structure of low-permeability reservoir rocks by means of computed tomography after implementation of the directional unloading method." Actual Problems of Oil and Gas, no. 39 (December 29, 2022): 27–42. http://dx.doi.org/10.29222/ipng.2078-5712.2022-39.art3.

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The article presents the results of comprehensive studies of changes in the internal structure and evolution of filtration properties of low-permeability rocks of the Astrakhan gas-condensate field when implementing the method of increasing well productivity – the directional unloading method. Physical modeling of the deformation and filtration processes on the unique Triaxial Independent Load Test System of the Institute for Problems in Mechanics of the Russian Academy of Sciences was carried out. A 3D scan of rocks after testing was performed using a ProCon CT-MINI high-resolution X-ray tomo

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45

Chen, Tao. "Equivalent Permeability Distribution for Fractured Porous Rocks: Correlating Fracture Aperture and Length." Geofluids 2020 (October 10, 2020): 1–12. http://dx.doi.org/10.1155/2020/8834666.

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Abstract (sommario):

Estimating equivalent permeability at grid block scale of numerical models is a critical issue for large-scale fractured porous rocks. However, it is difficult to constrain the permeability distributions for equivalent fracture models as these are strongly influenced by complex fracture properties. This study quantitatively investigated equivalent permeability distributions for fractured porous rocks, considering the impact of the correlated fracture aperture and length model. Two-dimensional discrete fracture models are generated with varied correlation exponent ranges from 0.5 to 1, which in

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46

Ni, Lin, Xue Zhang, Liangchao Zou, and Jinsong Huang. "Phase-field modeling of hydraulic fracture network propagation in poroelastic rocks." Computational Geosciences 24, no. 5 (April 19, 2020): 1767–82. http://dx.doi.org/10.1007/s10596-020-09955-4.

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Abstract Modeling of hydraulic fracturing processes is of great importance in computational geosciences. In this paper, a phase-field model is developed and applied for investigating the hydraulic fracturing propagation in saturated poroelastic rocks with pre-existing fractures. The phase-field model replaces discrete, discontinuous fractures by continuous diffused damage field, and thus is capable of simulating complex cracking phenomena such as crack branching and coalescence. Specifically, hydraulic fracturing propagation in a rock sample of a single pre-existing natural fracture or natural

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47

Pescov, Aleksander V. "Features of measuring absolute permeability of rocks." Vestnik of Samara State Technical University. Technical Sciences Series 28, no. 2 (July 27, 2020): 73–83. http://dx.doi.org/10.14498/tech.2020.2.5.

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Abstract (sommario):

Aspects of gas permeability measurement on samples of terrigenic and carbonate rocks of oil and gas collectors, as well as artificial samples on the domestic Darsimeter plant are considered. The following types of reservoir rocks were used for the study: pore, fractured, cavernous. The scope of application of the Darcy Law for pore-type rocks was clarified, which is limited to small pore pressures. Permeability coefficients were determined taking into account the gas slip-law effect of Klinkenberg on regression equations. Apparent permeability at low pressure drops was determined. For a number

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48

Zhang, Cheng-Han, Shuang You, Hong-Guang Ji, Fei Li, and Hong-Tao Wang. "Hydraulic properties and energy dissipation of deep hard rock under H-M coupling and cycling loads." Thermal Science 23, Suppl. 3 (2019): 935–42. http://dx.doi.org/10.2298/tsci180702181z.

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Abstract (sommario):

The permeability of deep rock is closely related to the stability and safety of underground engineering. The rocks in deep stratum are mostly with high stress and high osmotic pressure. Therefore, it is necessary to consider the coupling effect between porewater pressure and in situ stress on rock mass. A series of triaxial cyclic loading and unloading experiments under hydraulic-mechanics coupling conditions are carried out to studied the mechanical and hydraulic properties of granite in the depth of 1300 m to 1500 m. Especially, the effect of the disturbance on the permeability of fractured

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49

Li, Shi Ji, Ze Hua Wang, Yu Xue Sun, and Jian Bo Xie. "Stress Sensitivity of Low-Permeability Sandstone Reservoir." Advanced Materials Research 753-755 (August 2013): 686–89. http://dx.doi.org/10.4028/www.scientific.net/amr.753-755.686.

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Abstract (sommario):

In the time of low-permeability sandstone reservoir explored, effective stress rise gradually, stress sensitivity has happened, which cause permeability decline. Allowing to initial geostress, the study on Jilin oilfield Fuxin326 oil layer and made the rock core experiment are presented. The experimental results show that the stress sensitivity of this oil layer is small the regularity of permeability changes is in accordance with exponential function. The stress sensitivity of high permeability core is larger than low permeability. Moreover, experiments and theoretical analysis shows that low

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50

Wang, Qizhi, Xuebin Su, Bangbiao Wu, Wei Wang, and Wei Yuan. "A Coupled Damage-Permeability Constitutive Model for Brittle Rocks Subjected to Explosive Loading." Advances in Civil Engineering 2018 (July 22, 2018): 1–9. http://dx.doi.org/10.1155/2018/6816974.

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A dynamic constitutive model considering coupled damage-permeability effect is developed for rocks under explosion. The main purpose of this model is to provide reference to in situ leaching mining (include uranium ore, gold ore, etc.) to improve the permeability of rocks using blasting. The damage is induced and described by the summation of all principal tensile strains. This method does not need to determine (distinguish) the stress state of the material and thus does not need to consider the damage induced by differential stresses. A corresponding relation between the damage status and roc

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