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Letteratura scientifica selezionata sul tema "FPSWD"

Autore: Grafiati

Pubblicato: 11 settembre 2023

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Articoli di riviste sul tema "FPSWD"

Li, Li, Nicolas Younan e Xiaofei Shi. "A Novel Parameter Estimation Method Based on a Tuneable Sigmoid in Alpha-Stable Distribution Noise Environments". Sensors 18, n. 9 (8 settembre 2018): 3012. http://dx.doi.org/10.3390/s18093012.

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In this paper, a novel method, that employs a fractional Fourier transform and a tuneable Sigmoid transform, is proposed, in order to estimate the Doppler stretch and time delay of wideband echoes for a linear frequency modulation (LFM) pulse radar in an alpha-stable distribution noise environment. Two novel functions, a tuneable Sigmoid fractional correlation function (TS-FC) and a tuneable Sigmoid fractional power spectrum density (TS-FPSD), are presented in this paper. The novel algorithm based on the TS-FPSD is then proposed to estimate the Doppler stretch and the time delay. Then, the derivation of unbiasedness and consistency is presented. Furthermore, the boundness of the TS-FPSD to the symmetric alpha stable ( S α S ) noise, the parameter selection of the TS-FPSD, and the feasibility analysis of the TS-FPSD, are presented to evaluate the performance of the proposed method. In addition, the Cramér–Rao bound for parameter estimation is derived and computed in closed form, which shows that better performance has been achieved. Simulation results and theoretical analysis are presented, to demonstrate the applicability of the forgoing method. It is shown that the proposed method can not only effectively suppress impulsive noise interference, but it also does not need a priori knowledge of the noise with higher estimation accuracy in alpha-stable distribution noise environments.

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Molohkov, Dmitry, Andy Pietsch, Jack Harfoushian e Shahid Azizul Haq. "Application of formation pressure while drilling in Australia: North West Shelf examples". APPEA Journal 49, n. 2 (2009): 568. http://dx.doi.org/10.1071/aj08041.

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Since its introduction in the 1950s, the point-by-point wireline formation pressure measurement technique has been successfully used for formation evaluation and reservoir management, and has been an essential input into reservoir models. In exploration and appraisal wells, where depletion has not yet affected the reservoir, vertical pressure profiling can be used for fluid gradient determination that may be interpreted in terms of fluid densities and contacts. In a dynamic producing environment pressure measurements can help to identify vertical and horizontal boundaries and communication. Measurement of pressure distribution along the borehole was historically done with wireline instruments or, in difficult logging conditions, with wireline instruments conveyed by drill pipe. In some environments, especially in highly deviated and S-shaped wells or unconsolidated formations, drill pipe conveyance of wireline formation pressure testers introduces significant operational risk. Formation Pressure While Drilling (FPWD), introduced in 2003, offers a new cost-effective solution for gathering formation pressure data. FPWD is a new method to directly measure formation pore pressure as the well is being drilled, extending its application beyond traditional fluid typing, contacts and compartmentalisation determination to well control and drilling optimisation. The market for FPWD is developing rapidly with all major service companies providing their own implementations of the technology. The next step in the evolution of FPWD technology—sampling while drilling—is not commercially available yet, but this is just a matter of time. The case history presented in this extended abstract is an example of the application and lessons learned from the FPWD service used in one of the oil fields on the North West Shelf, Australia.

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Ma, Tianshou, Nian Peng, Ping Chen, Chunhe Yang, Xingming Wang e Xiong Han. "Study and Verification of a Physical Simulation System for Formation Pressure Testing while Drilling". Geofluids 2018 (19 agosto 2018): 1–18. http://dx.doi.org/10.1155/2018/1731605.

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Based on a brief overview on the determination methods of formation pressure and their features, the major principle of formation pressure testing while drilling (FPTWD) and existing physical simulation systems was introduced, and the deficiency of the existing physical simulation systems was also discussed. A laboratory high-precision physical simulation system was therefore developed to simulate the downhole testing environment and testing process of FPTWD. The present experimental system was designed to endure pressures up to 20,000 psi, and the relative control accuracy of pressure is approximately 0.02% FS. Two kinds of man-made specimens with the permeability of 10–110 mD were used to test the pressure response and to verify the present physical simulation system. The debugging results indicated that the variation amplitude under the stable condition is approximately 0.07 psi, 0.08 psi, 0.11 psi, and 0.11 kN for the annular pressure, pore pressure, confining pressure, and thrust force, respectively. Thus, the high control accuracy is approximately ±1.0 psi under the stable conditions. The experimental results indicated that the pressure drawdown declines rapidly in the stage of withdrawing formation fluids and then recovers slowly. The pressure drop amplitude also decreases with permeability, while the pressure buildup amplitude increases with permeability. The tendency of pressure change is nearly the same for both the present and the previous systems, and the pressure curve of the present system is much smoother and better than that of the previous system. The relative error of explaining formation pressure is less than 1% and 4% for the present and the previous systems, respectively. In addition, this physical simulation system has important applications to verify the interpretation model, to analyze pressure response recorded by FPTWD tools, to test the capability and design of FPTWD tools, and to calibrate the formation pressure, formation parameters, and instrument factors.

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Denney, Dennis. "Integrating FPWD Measurements With Managed-Pressure Drilling". Journal of Petroleum Technology 65, n. 04 (1 aprile 2013): 120–23. http://dx.doi.org/10.2118/0413-0120-jpt.

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Gao, Yi‐Qiang, Wei Shen, Liang Wu e Xiao‐Wei Sun. "Substrate integrated waveguide FPWD with quasi‐elliptic response". Electronics Letters 55, n. 1 (gennaio 2019): 41–43. http://dx.doi.org/10.1049/el.2018.6836.

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Lai, Zhiqiang, Li Pan, Zhongmei Wang, Jiayi Wang e Yanfen Ren. "Numerical Simulation of Granular Column Collapse with Fractal Particle Size Distribution Using Discrete Element Method". Journal of Physics: Conference Series 2068, n. 1 (1 ottobre 2021): 012009. http://dx.doi.org/10.1088/1742-6596/2068/1/012009.

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Abstract This study conducts numerical simulations of the granular column collapse with Fractal Particle Size Distributions (FPSDs) via the Discrete Element Method (DEM) and investigated kinetic behaviours of dry granular flows. The aim of this paper is to explore the effects of the fractal dimension of FPSD on the kinetics of dry granular flows. When the fractal dimension of the flows consisting of granular materials increases, the horizontal particle translational velocities become greater and the mobility improves, whereas the particle rotational velocities decrease. Meanwhile, the change in the potential energy increases, and the particle kinetic energy in the rotational form reduces; thus, the particle kinetic energy in the translational form increases. The reducing particle rotational movement may be related to the reducing particle shearing behaviours because only the contact shearing can affect particle rotational motion. In conclusion, a larger fractal dimension of FPSD of a dry granular flow leads to a longer spreading distance and a smaller rotational velocity.

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Supiarza, Hery, e Harry Tjahjodiningrat. "Repertoar Musik Keroncong Dengan Menggunakan Idiom Musik Sunda: Implementasi Model Pembelajaran Kolaborasi pada Mata Kuliah Sejarah Analisis Musik Indonesia di Departemen Pendidikan Musik FPSD UPI Bandung". Resital: Jurnal Seni Pertunjukan 21, n. 3 (6 agosto 2021): 127–37. http://dx.doi.org/10.24821/resital.v21i3.4740.

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Analysis at the Department of Music Education, FPSD, Universitas. Pendidikan Indonesia This study discusses the Implementation of Collaborative Learning Models in the History course of Indonesian music analysis at the Department of Music Education, UPI Baandung FPSD. The researcher as a lecturer in this course intends to add to the repertoire of keroncong songs, which since the 1980s keroncong song production has stalled due to competition in the Indonesian music industry. The Action Research method was used in this study to develop students' abilities in creating keroncong songs. 7 stages are used, starting from initial observation, analysis, combining ideas and ideas into big themes, evaluation exercises 1, recording and mastering. The results of this study created 10 keroncong music recordings as a product of a pure repertoire of student collaboration with the Sundanese traditional approach as the basis for creation. Future research will improve the 10 products into a more professional recording result. This research can be a reference for the application of collaborative learning models to create student work and creations in the arts.

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Zuluaga, Carlos M., e Alex Albert. "Preventing falls: Choosing compatible Fall Protection Supplementary Devices (FPSD) for bridge maintenance work using virtual prototyping". Safety Science 108 (ottobre 2018): 238–47. http://dx.doi.org/10.1016/j.ssci.2017.08.006.

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Supiarza, Hery, e Ria Sabaria. "Short Dance Film: Construction of the Arts and Design Project Subject during COVID-19 Pandemic". Humaniora 13, n. 2 (19 maggio 2022): 137–43. http://dx.doi.org/10.21512/humaniora.v13i2.7908.

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The research discussed short dance films as the product of the Arts and Design Project subject at FPSD Universitas Pendidikan Indonesia during the COVID-19 pandemic. The importance of a collaborative learning model between two disciplines, dance and film, had emerged the notion of creating an art product. The research aimed to create dance film products as a form of student constructive idea. With the participatory action research method, the data were collected and validated to be analyzed and then embodied in the form of a dance film product. The research was applied to 53 students in collaboration between the Department of Dance Education and the Film and Television Study Program, divided into eight small groups of six to seven members. The action stages of the research were: (1) observation and analysis; (2) collection of ideas and notions in the form of a script; (3) testing; (4) shooting; (5) product. The research finds that: (1) through a collaborative learning model, the subject of Arts and Design Project could be implemented to create a dance film product, short dance film; and (2) during the COVID-19 pandemic, collaborative learning could enable students to keep productive to create the product of their learning result. As an advantage, the research result can be used as a learning sample of production-based subjects during the pandemic where the learning and teaching activity should be done at home.

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Zou, Bing-Zi, Hong Wen, Huan-Jia Luo, Wan-Chao Luo, Qi-Tong Xie e Meng-Ting Zhou. "Value of serum free prostate-specific antigen density in the diagnosis of prostate cancer". Irish Journal of Medical Science (1971 -), 6 luglio 2023. http://dx.doi.org/10.1007/s11845-023-03448-w.

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Abstract Purpose To investigate the value of serum free prostate-specific antigen density (fPSAD) in the diagnosis of prostate cancer (PCa). Methods The data of 558 patients who underwent transrectal ultrasound-guided prostate biopsy were retrospectively analyzed. According to the pathological results, the patients were divided into a PCa group and a benign prostatic hyperplasia (BPH) group. Receiver operating characteristic curves were plotted, based on which the sensitivity, specificity, Youden index, concordance, and kappa values of free prostate-specific antigen (fPSA), the free-to-total f/tPSA, prostate-specific antigen density (PSAD), the free-to-total (f/t)/PSAD ratio, and fPSAD were compared. The patients were divided into three groups by PSA levels (PSA < 4 ng/mL, PSA = 4–10 ng/mL, and PSA > 10 ng/mL), into three groups by age (age < 60 year, age = 60–80y, and age > 80 years), and into two groups by prostate volume (PV) (PV ≤ 80 mL and PV > 80 mL) to compare the sensitivity, specificity, and concordance of indicators. Results tPSA, PSAD, (f/t)/PSAD, and fPSAD had high accuracy in predicting PCa with AUC values of 0.820, 0.900, 0.846, and 0.867. fPSAD showed lower diagnostic sensitivity but significantly higher specificity and concordance for PCa than tPSA, f/tPSA, (f/t)/PSAD, or PSAD. Thus, fPSAD had the highest accuracy in the diagnosis of PCa. In the groups with different PSA, age, and PV stratification, the concordance of fPSAD was significantly higher (88.61%, 90.74%, and 90.38%) than that of other indicators. Conclusion With the optimal cutoff value of 0.062, fPSAD has a higher diagnostic value for PCa than tPSA, f/tPSA, (f/t)/PSAD, and PSAD, and can well predict the risk of PCa, significantly improve the clinical diagnostic rate of PCa, and reduce unnecessary biopsy.

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Tesi sul tema "FPSWD"

LODOE, JIGMET. "EXPERIMENTAL INVESTIGATION OF SOLAR DISTILLATION SYSTEM AND DOMESTIC HOT WATER IN COGENERATION PROCESS". Thesis, 2016. http://dspace.dtu.ac.in:8080/jspui/handle/repository/14748.

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Flat Plate Solar Water Distillation (FPSWD) system works on the simple principle of evaporation and condensation process .Unlike other types of distillation system which works either by consuming electrical energy or by burning fossil fuels, it works simply on thermal energy provided by the Sun which is free in nature. The hot waste brackish water is cogenerated. It takes brackish or impure water as an input to the system and fresh water as well as hot brackish water as an output. The simple design of the system makes it suitable for disaster situations mainly flood, where the water is plenty but unsafe to drink. This system which consists of 10 panels i.e. area of 30 m2 has been evaluated and observations were recorded on the basis of field data collected at the Out –Door Test Bed of (period of 8-10 hours) in the month of May,2015 at National Institute of Solar Energy (Latitude: 28025’N, Longitude:7709’E) ,Haryana (India) by taking reading of daily fresh water production corresponding to variation of temperature ,wind speed, solar intensity and ambient temperature during daytime for every hourly basis during daylight from (9.00a.m. to 5.00 p.m.) The inlet feed water that comes from tank is 360 ppm and out let of fresh water & hot brackish water reached at zero ppm & 650 ppm respectively. The fresh water has been achieved 5.2 litres/day m2 at the titled global radiation of 6.2kWh/m2. The average temperature of hot water (brackish water) is 47 0C at the ambient temperature of 240C. The fresh water output is 4.68 litres/day m2 and collected hot water (brackish water) is reached approximately 480 litres/day at 480C, which can be used for domestic proposes.

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Capitoli di libri sul tema "FPSWD"

Kordaki, Maria. "A Special Purpose E-Learning Environment". In Web-Based Intelligent E-Learning Systems, 348–75. IGI Global, 2006. http://dx.doi.org/10.4018/978-1-59140-729-4.ch017.

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This study presents the concept of Special Purpose E-Learning Environments (SPELEs). The main aim of these environments is to meet the learners’ individual learning differences related to a specific learning subject. An architecture of the design of SPELEs is presented. The background of this design, which is based on interpretations of modern constructivist and social views of learning in the Internet context, is also presented. Based on this architecture a specific SPELE, designed for the learning of concepts related to Files and Peripheral Storage Devices (FPSD.), is demonstrated and its pilot evaluation study with real students is reported. The analysis of the data verifies the theoretical design of SPELEs, which consists of five parts: (a) organization of the content of a specific learning subject, (b) learning activities (c) learner activity space (d) learner assessment, and (e) learner communication. The analysis of the data also gives evidence for future improvements of the specific SPELE mentioned above.

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Atti di convegni sul tema "FPSWD"

Blanco, Yon, Ben Fletcher, Robert Webber, Alistair Maguire e Velerian Lopes. "FIELDWIDE DYNAMIC PRESSURE SURVEILLANCE WITH FPWD TECHNOLOGY". In 2021 SPWLA 62nd Annual Logging Symposium Online. Society of Petrophysicists and Well Log Analysts, 2021. http://dx.doi.org/10.30632/spwla-2021-0107.

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Reservoir management utilizes time-lapse pressure data that is captured over years in order to monitor reservoir development. Several methods can be used to establish field-wide hydraulic lateral and/or vertical connectivity: well testing, monitoring of permanent downhole gauges, wireline and LWD formation testers. While a typical formation pressure survey provides information about reservoir depletion or charge (production or injection), in a field with several wells it is not clearly understood where the pressure disturbances are coming from, which can hamper further field development decision making in terms of infill well selection and drilling. A novel method is introduced where a Formation Pressure While Drilling (FPWD) tool is run in UKCS wells and used to acquire interference data while drilling. Initially reservoir pressures are acquired as soon as practically possible after drilling. Having established these benchmark pressures, nearby injectors and/or producers can be started or shut in one at a time. Drilling is then resumed and after a certain time has elapsed since the benchmark pressure acquisition (typically at least 12 hours), the pressure measurements are repeated using the FPWD tool to evaluate the influence of the created transients in order to prove or disprove either lateral or vertical hydraulic connectivity across reservoirs. This way, the influence of a single offset well is evaluated in real time over the reservoir being currently drilled. This helps in the determination of interference pattern whereby injector wells can be judged for selective zone injections and producers can be rated in terms of zonal contribution which can help in completion design. These direct pressure measurements can illuminate reservoir pressure complexity seen in mature fields and provide operators with the means to safely and effectively construct wells to develop brownfields. The pressure changes obtained are used not only by reservoir engineers as an additional source of dynamic data into the reservoir simulation model but also help geologists in refining the geological or basin model. Two applications of real-time interference testing using FPWD from a recent drilling campaign are shown. In the first application, communication between wells is tested to reduce the risk of accidentally completing a well in an area of the field that experiences insufficient injection support. In the second application, real-time interference testing is used to identify a specific zone in a multi-layered reservoir sequence in order to enable selective completion.

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Liu, Xiaogang, Lv Tan, Pengyuan Xia, Zongbin Liu, Bingliang Zhang, Jianmin Zhu, Lei Zhang e Xiangbin Nie. "FPWD Illuminates the Path for Brown Field Development in Bohai Bay". In EUROPEC 2015. Society of Petroleum Engineers, 2015. http://dx.doi.org/10.2118/174331-ms.

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Anurag, Atul Kumar, Adel Alkatheeri, Alvaro Sainz, Khalid Javid, Yaxin Liu, Ahmed Al-Ali, Viraj Nitin Telang, Kshudiram Indulkar, Piyanuch Kieduppatum e Hiten Pankajkumar Thar. "A Success Story of Critical Data Gathering During the Development Phase of Extreme ERD Well Drilling". In Abu Dhabi International Petroleum Exhibition & Conference. SPE, 2021. http://dx.doi.org/10.2118/208036-ms.

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Abstract This paper discusses a holistic combination of advanced formation evaluation techniques with pressure testing and reservoir navigation services to mitigate uncertainty related challenges in real time and successfully drill & place ERD laterals targeting Jurassic carbonate reservoirs. A meticulously planned approach to navigate the well trajectory by tracking the desired properties, informed decision-making while drilling and accurate data acquisition for aiding appropriate selection and placement in-flow control device (ICD) in lower completion design and future reservoir management contributed to the success of these complex wells in carbonate reservoirs. The first well in this study, involved drilling and evaluating a long lateral section as single oil producer targeting a carbonate reservoir. While no tar presence was expected, a combination of density, neutron porosity and nuclear magnetic resonance (NMR) logs while drilling resulted in identifying a deficit NMR porosity when compared to density porosity. Deployment of a formation pressure testing while drilling (FPWD) tool enabled measurement of the formation mobility and validate the presence of a tar. Using the same combination of measurements in the subsequent wells for delineating the tar enabled accurate planning of injection wells on the periphery of the field. Approximately 3 days were saved compared to the first well where the drill string had to be POOH to run-in with FPWD service. Hence, having FPWD tool in the same string helped in confirming the formation mobility in real time to call for critical decision making like changing the well trajectory or calling an early TD. Across all the wells drilled in this field, the formation pressure, mobility and porosity measurements provided valuable input for optimum ICD placement and design. Successful identification of unexpected tar resulted in substantial rig time savings, accurate planning of asset utilization and added confidence in design and placement of lower completions by utilizing LWD data. Benefits of integrated data and services combination became clear for applications involving advanced reservoir characterization and enhanced well placement in complex carbonate reservoirs. From the offset wells, a tar was seen in deeper formations but the integration of LWD NMR and mobility data from this well confirmed the presence of a tar within the zone of interest. The study established a cost-effective workflow for mitigating uncertainties related to tar encountered while drilling extreme ERD laterals in an offshore environment where any lost time results in significant increase in expenditures during the development phase. A systematic approach to tackle these uncertainties along with acquisition of critical data for the design & placement of completion results in optimum production from the reserves.

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M. Al-Shobail, Yousef, Doug Seifert, Ridvan Akkurt e Saleh Dossari. "Real-Time Petrophysical Integration of NMRWD, FPWD and LWD Triple-Combo in Slim Holes". In GEO 2010. European Association of Geoscientists & Engineers, 2010. http://dx.doi.org/10.3997/2214-4609-pdb.248.269.

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Blanco, Yon, e Marcus Turner. "Application & Evolution of Formation Pressure While Drilling Technology (FPWD) Applied To The Gulf of Mexico". In SPE Annual Technical Conference and Exhibition. Society of Petroleum Engineers, 2011. http://dx.doi.org/10.2118/147556-ms.

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Hursan, Gabor, Mohammed Sahhaf e Wala’a Amairi. "Utilizing NMR Workflow to Optimize Power Water Injector Placement in the Presence of Tar Barriers". In SPE Middle East Oil & Gas Show and Conference. SPE, 2021. http://dx.doi.org/10.2118/204565-ms.

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Abstract The objective of this work is to optimize the placement of horizontal power water injector (PWI) wells in stratified heterogeneous carbonate reservoir with tar barriers. The key to successful reservoir navigation is a reliable real-time petrophysical analysis that resolves rock quality variations and differentiates tar barriers from lighter hydrocarbon intervals. An integrated workflow has been generated based on logging-while drilling (LWD) triple combo and Nuclear Magnetic Resonance (NMR) logging data for fluid identification, tar characterization and permeability prediction. The workflow has three steps; it starts with the determination of total porosity using density and neutron logs, the calculation of water-filled porosity from resistivity measurements and an additional partitioning of porosity into bound and free fluid volumes using the NMR data. Second, the total and water-filled porosity, the NMR bound fluid and NMR total porosity are used as inputs in a hydrocarbon compositional and viscosity analysis of hydrocarbon-bearing zones for the recognition of tar-bearing and lighter hydrocarbon intervals. Third, in the lighter hydrocarbon intervals, NMR logs are further analyzed using a multi-cutoff spectral analysis to identify microporous and macroporous zones and to calculate the NMR mobility index. The ideal geosteering targets are highly macroporous rocks containing no heavy hydrocarbons. In horizontal wells, the method is validated using formation pressure while drilling (FPWD) measurements. The procedure has been utilized in several wells. The original well path of the first injector was planned to maintain a safe distance above an anticipated tar-bearing zone. Utilizing the new real-time viscosity evaluation, the well was steered closer to the tar zone several feet below the original plan, setting an improved well placement protocol for subsequent injectors. In the water- or lighter hydrocarbon-bearing zones, spectral analysis of NMR logs clearly accentuated micro- and macroporous carbonate intervals. The correlation between pore size and rock quality has been corroborated by FPWD mobility measurements. In one well, an extremely slow NMR relaxation may indicate wettability alteration in a macroporous interval. An integrated real-time evaluation of porosity, fluid saturation, hydrocarbon viscosity and pore size has enhanced well placement in a heterogeneous carbonate formation where tar barriers are also present. The approach increased well performance and substantially improved reservoir understanding.

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Duru, Elizabeth C., Forrest Liu, Ilaria De Santo e Oluwatosin Odewoye. "Formation Pressure While Drilling (FPWD) Tool Application in Reservoir Management - Case Study on Tetra-Mega Field, NYC Nigeria". In Nigeria Annual International Conference and Exhibition. Society of Petroleum Engineers, 2011. http://dx.doi.org/10.2118/150768-ms.

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Ramatullayev, Samat, Akikat Makhmotov, Muratbek Zhabagenov, Dastan Ospanov, Yura Markelov, Alexander Navrotsky, Yerlan Gabdyzhamalov, Ruslan Nurgaliyev, Giorgio Maletti e Tatyana Assanova. "Application of Formation Pressure While Drilling FPWD Technology in Challenging Low Mobility Environment – Case Study from Western Kazakhstan". In SPE Russian Petroleum Technology Conference. Society of Petroleum Engineers, 2018. http://dx.doi.org/10.2118/191696-18rptc-ms.

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Adoghe, Leo, Oghogho Effiom, Olatunji Bakare, Akanimoh Nkanga, Forrest Liu e Rita Okoroafor. "Optimizing Waterflooding Schemes and Completion Decisions in Deepwater Environments Using Formation Pressure While Drilling (FPWD): A Bonga Field Application". In Nigeria Annual International Conference and Exhibition. Society of Petroleum Engineers, 2012. http://dx.doi.org/10.2118/162997-ms.

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Ramatullayev, Samat, Akikat Makhmotov, Muratbek Zhabagenov, Dastan Ospanov, Yura Markelov, Alexander Navrotsky, Yerlan Gabdyzhamalov, Ruslan Nurgaliyev, Giorgio Maletti e Tatyana Assanova. "Application of Formation Pressure While Drilling FPWD Technology in Challenging Low Mobility Environment – Case Study from Western Kazakhstan (Russian)". In SPE Russian Petroleum Technology Conference. Society of Petroleum Engineers, 2018. http://dx.doi.org/10.2118/191696-18rptc-ru.

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