Download or read book Effects of Non Darcy Flow on Pressure Buildup Analysis of Hydraulically Fractured Gas Reservoirs written by Cesar Alvarez Vera and published by . This book was released on 2001 with total page 178 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Qualitative Analysis of Non Darcy Flow Effects in Hydraulically Fractured Gas Wells written by Joanne Carol Hresko and published by . This book was released on 1985 with total page 130 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Impact of Gravity Segregation on Multiphase Non Darcy Flow in Hydraulically Fractured Gas Wells written by Mark Ian Dickins and published by . This book was released on 2008 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Multiphase and non-Darcy flow effects in hydraulically fractured gas wells reduce effective fracture conductivity. Typical proppant pack laboratory experiments are oriented in such a way such that phase segregation is not possible, which results in mixed flow. Tidwell and Parker (1996), however, showed that in proppant packs, gravity segregation occurs for simultaneous gas and liquid injection at laboratory scale (1500 cm2). Although the impact of gravity on flow in natural fractures has been described, previous work has not fully described the effect of gravity on multiphase non-Darcy flow in hydraulic fractures. In this work, reservoir simulation modeling was used to determine the extent and impact of gravity segregation in a hydraulic fracture at field scale. I found that by ignoring segregation, effective fracture conductivity can be underestimated by up to a factor of two. An analytical solution was developed for uniform flux of water and gas into the fracture. The solution for pressures and saturations in the fracture agrees well with reservoir simulation. Gravity segregation occurs in moderate-to-high conductivity fractures. Gravity segregation impacts effective fracture conductivity when gas and liquid are being produced at all water-gas ratios modeled above 2 Bbls per MMscf. More realistic, non-uniform-flux models were also run with the hydraulic fracture connected to a gas reservoir producing water. For constant-gas-rate production, differences in pressure drop between segregated cases and mixed flow cases range up to a factor of two. As the pressure gradient in the fracture increases above 1 to 2 psi/ft, the amount of segregation decreases. Segregation is also less for fracture half-length-to-height ratios less than or close to two. When there is less segregation, the difference in effective conductivity between the segregated and mixed flow cases is reduced. I also modeled the water injection and cleanup phases for a typical slickwater fracture treatment both with and without gravity effects and found that for cases with segregation, effective fracture conductivity is significantly higher than the conductivity when mixed flow occurs. Gravity segregation is commonly ignored in design and analysis of hydraulically fractured gas wells. This work shows that segregation is an important physical process and it affects effective fracture conductivity significantly. Hydraulic fracture treatments can be designed more effectively if effective fracture conductivity is known more accurately.
Download or read book Decline Curve Analysis for Real Gas Wells with Non Darcy Flow written by Michael Lee Fraim and published by . This book was released on 1989 with total page 522 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Multiphase Fluid Flow in Porous and Fractured Reservoirs written by Yu-Shu Wu and published by Gulf Professional Publishing. This book was released on 2015-09-23 with total page 420 pages. Available in PDF, EPUB and Kindle. Book excerpt: Multiphase Fluid Flow in Porous and Fractured Reservoirs discusses the process of modeling fluid flow in petroleum and natural gas reservoirs, a practice that has become increasingly complex thanks to multiple fractures in horizontal drilling and the discovery of more unconventional reservoirs and resources. The book updates the reservoir engineer of today with the latest developments in reservoir simulation by combining a powerhouse of theory, analytical, and numerical methods to create stronger verification and validation modeling methods, ultimately improving recovery in stagnant and complex reservoirs. Going beyond the standard topics in past literature, coverage includes well treatment, Non-Newtonian fluids and rheological models, multiphase fluid coupled with geomechanics in reservoirs, and modeling applications for unconventional petroleum resources. The book equips today's reservoir engineer and modeler with the most relevant tools and knowledge to establish and solidify stronger oil and gas recovery. - Delivers updates on recent developments in reservoir simulation such as modeling approaches for multiphase flow simulation of fractured media and unconventional reservoirs - Explains analytical solutions and approaches as well as applications to modeling verification for today's reservoir problems, such as evaluating saturation and pressure profiles and recovery factors or displacement efficiency - Utilize practical codes and programs featured from online companion website
Download or read book The Analysis and Prediction of Well Performance for Hydraulically Fractured Wells Using Reservoir Modelling Techniques written by Gas Research Institute and published by . This book was released on 1990 with total page 90 pages. Available in PDF, EPUB and Kindle. Book excerpt: Since 1983, numerous cooperative research wells and Staged Field Experiments have been conducted in the Travis Peak formation in east Texas by the Gas Research Institute (GRI). Many of the wells analyzed have exhibited slow fracture fluid cleanup. In these cases, several days or weeks of flow were required after the treatment before significant gas flow was measured. For these same wells, post-fracture pressure buildup data were often difficult to analyze with confidence using conventional analysis methods. As such, a research project was undertaken to better understand post-fracture production and pressure transient behavior. The objective of the research project was to investigate fractures that affected fracture fluid injection, fracture fluid inhibition and fracture fluid cleanup in wells that are completed in low permeability gas reservoirs. It was also important to determine which of the factors most affected the analysis of post-fracture pressure transient data and the ultimate gas recovery. Before these items could be studied in detail, however, it was also necessary to learn how to model correctly these effects by taking into account factors such as formation damage, fracture conductivity damage, non-Darcy flow, relative permeability hysteresis and capillary pressure effects. The result of this research showed that fracture conductivity must be high enough to allow proper fracture fluid cleanup prior to running a pressure transient test. If the fracture has not cleaned up sufficiently, the incorrect result will be obtained from conventional pressure transient test methods. Even if most of the fluid has been cleaned up, the results obtained from conventional methods should only be considered first order approximations. The engineer must then take these estimates and use reservoir simulation methods to history match the production and pressure transient data in order to better analyze the formation and fracture properties. The research also demonstrated that producing a well on a small choke after a fracture treament will maximize ultimate gas recovery. If severe crushing of the proppant occurs due to rapid pressure drawdown, then fracture fluid can be trapped in and around the fracture which will tend to suppress gas production and reduce ultimate gas recovery. In summary, the reservoir engineering research has led to the conclusion that multilayered, multiphase reservoir systems such as are normally encountered in low permeability rocks are difficult to evaluate with accuracy unless multiphase, multilayered reservoir models are used to history match all of the available data.
Download or read book Behavior of Hydraulically Fractured Gas Wells in the Presence of Reservoir and Fracture Non Darcy Flow written by Albert Jason Stark and published by . This book was released on 1998 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Behavior of Hydraulically Fractured Gas Wells in the Presence of Reservoir and Fracture Non Darcy Flow written by and published by . This book was released on 1999 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Hydraulic Proppant Fracturing and Gravel Packing written by D. Mader and published by Elsevier. This book was released on 1989-03-01 with total page 1277 pages. Available in PDF, EPUB and Kindle. Book excerpt: Many aspects of hydraulic proppant fracturing have changed since its innovation in 1947. The main significance of this book is its combination of technical and economical aspects to provide an integrated overview of the various applications of proppants in hydraulic fracturing, and gravel in sand control. The monitoring of fractures and gravel packs by well-logging and seismic techniques is also included.The book's extensive coverage of the subject should be of special interest to reservoir geologists and engineers, production engineers and technologists, and well log analysts.
Download or read book Investigation of the Effect of Non Darcy Flow and Multi phase Flow on the Productivity of Hydraulically Fractured Gas Wells written by Nasraldin Abdulslam A. Alarbi and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Hydraulic fracturing has recently been the completion of choice for most tight gas bearing formations. It has proven successful to produce these formations in a commercial manner. However, some considerations have to be taken into account to design an optimum stimulation treatment that leads to the maximum possible productivity. These considerations include, but not limited to, non-Darcy flow and multiphase flow effects inside the fracture. These effects reduce the fracture conductivity significantly. Failing to account for that results in overestimating the deliverability of the well and, consequently, to designing a fracture treatment that is not optimum. In this work a thorough investigation of non-Darcy flow and multi-phase flow effects on the productivity of hydraulically fractured wells is conducted and an optimum fracture design is proposed for a tight gas formation in south Texas using the Unified Fracture Design (UFD) Technique to compensate for the mentioned effects by calculating the effective fracture permeability in an iterative way. Incorporating non-Darcy effects results in an optimum fracture that is shorter and wider than the fracture when only Darcy calculations are considered. That leads to a loss of production of 5, 18% due to dry and multiphase non-Darcy flow effects respectively. A comparison between the UFD and 3D simulators is also done to point out the differences in terms of methodology and results. Since UFD incorporated the maximum dimensionless productivity index in the fracture dimensions design, unlike 3D simulators, it can be concluded that using UFD to design the fracture treatment and then use the most important fracture parameters outputs (half length and CfDopt) as inputs in the simulators is a recommended approach.
Download or read book Naturally Fractured Reservoirs written by Roberto Aguilera and published by PennWell Books. This book was released on 1980 with total page 730 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book deals exclusively with naturally fractured reservoirs and includes many subjects usually treated in separate volumes. A highly practical edition, Naturally Fractured Reservoirs is written for students, reservoir geologists, log analysts and petroleum engineers.
Download or read book Non Darcy Flow and Multi Phase Flow written by Nasraldin Alarbi and published by LAP Lambert Academic Publishing. This book was released on 2011-12 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt: Hydraulic fracturing has recently been the completion of choice for most tight gas formations. It has proven successful to produce these formations in a commercial manner. However, some considerations have to be taken into account when designing a fracture treatment. These considerations include, but not limited to, non-Darcy flow and multiphase flow effects inside the fracture. These effects reduce the fracture conductivity significantly. Failing to account for that results in overestimating the deliverability of the wells and, consequently, to designing a fracture treatment that is not optimum. In this book a thorough investigation of non-Darcy flow and multi-phase flow effects on the productivity of hydraulically fractured gas wells is conducted and an optimum fracture design is proposed for a tight gas formation in south Texas using the Unified Fracture Design (UFD) Technique to compensate for the mentioned effects by calculating the effective fracture permeability in an iterative way. A comparison between the UFD and the most well known 3D fracture simulators is also carried out to point out the differences as far as the methodology and design considerations.
Download or read book Fossil Energy Update written by and published by . This book was released on 1977 with total page 748 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Microflows written by George Em Karniadakis and published by Springer. This book was released on 2001-11-16 with total page 340 pages. Available in PDF, EPUB and Kindle. Book excerpt: This monograph focusing on gas flows addresses mostly theoretical issues and develops semi-analytical models as well as numerical methods for stimulating micro flows. It is appropriate for researchers in fluid mechanics interested in this new flow field as well as for electrical or mechanical engineers or physicists who need to incorporate flow modeling into their work.
Download or read book Journal of Petroleum Technology written by and published by . This book was released on 2004 with total page 526 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Applied Mechanics Reviews written by and published by . This book was released on 1977 with total page 892 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Gas Condensate Non darcy Flow Effects in Idealized Dual porosity dual permeability Naturally Fractured Reservoirs written by Benjamin A. Ramirez and published by . This book was released on 2007 with total page 196 pages. Available in PDF, EPUB and Kindle. Book excerpt:
