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Significance Of Fracture Face Matrix Damage To The Performance Of Vertically Fractured Wells
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Book Synopsis Significance of Fracture Face Matrix Damage to the Performance of Vertically-fractured Wells by : Ershad Ganjy
Download or read book Significance of Fracture Face Matrix Damage to the Performance of Vertically-fractured Wells written by Ershad Ganjy and published by . This book was released on 2011 with total page 134 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Performance of Vertically-fractured Wells with Finite-conductivity Fractures by : Ming-Lung Mao
Download or read book Performance of Vertically-fractured Wells with Finite-conductivity Fractures written by Ming-Lung Mao and published by . This book was released on 1977 with total page 398 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Performance Evaluation of Wells With Single and Multiple Fractures in Tight Formations by : Feng Zhang
Download or read book Performance Evaluation of Wells With Single and Multiple Fractures in Tight Formations written by Feng Zhang and published by . This book was released on 2014 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Proceedings written by and published by . This book was released on 1997 with total page 690 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Rock Fractures and Fluid Flow by : National Research Council
Download or read book Rock Fractures and Fluid Flow written by National Research Council and published by National Academies Press. This book was released on 1996-08-27 with total page 568 pages. Available in PDF, EPUB and Kindle. Book excerpt: Scientific understanding of fluid flow in rock fracturesâ€"a process underlying contemporary earth science problems from the search for petroleum to the controversy over nuclear waste storageâ€"has grown significantly in the past 20 years. This volume presents a comprehensive report on the state of the field, with an interdisciplinary viewpoint, case studies of fracture sites, illustrations, conclusions, and research recommendations. The book addresses these questions: How can fractures that are significant hydraulic conductors be identified, located, and characterized? How do flow and transport occur in fracture systems? How can changes in fracture systems be predicted and controlled? Among other topics, the committee provides a geomechanical understanding of fracture formation, reviews methods for detecting subsurface fractures, and looks at the use of hydraulic and tracer tests to investigate fluid flow. The volume examines the state of conceptual and mathematical modeling, and it provides a useful framework for understanding the complexity of fracture changes that occur during fluid pumping and other engineering practices. With a practical and multidisciplinary outlook, this volume will be welcomed by geologists, petroleum geologists, geoengineers, geophysicists, hydrologists, researchers, educators and students in these fields, and public officials involved in geological projects.
Download or read book Energy Research Abstracts written by and published by . This book was released on 1990 with total page 480 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Analytical Modeling of Multi-Fractured Horizontal Wells in Heterogeneous Unconventional Reservoirs by : Jie Zeng
Download or read book Analytical Modeling of Multi-Fractured Horizontal Wells in Heterogeneous Unconventional Reservoirs written by Jie Zeng and published by . This book was released on 2017 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Current analytical models for multi-fractured horizontal wells (MFHW) generally neglect reservoir heterogeneity, typical seepage characters of unconventional reservoir, partially penetrating fracture and various fracture damage mechanisms. In this thesis, three linear flow models have been developed to facilitate pressure and rate behavior analysis of shale, tight sand and unconventional reservoir with damaged fractures. These models are validated by comparing with KAPPA Ecrin and are more accurate than previous linear flow models in modeling partially penetrating cases. Field data are analyzed and results prove the reliability of these models. The first model is for heterogeneous shale reservoir with multiple gas transport mechanisms. It subdivides the reservoir into seven parts, namely, two upper/lower regions, two outer regions, two inner regions, and hydraulic fracture region. Fracture interference is simulated by locating a no-flow boundary between two adjacent fractures. The locations of these boundaries are determined based on the boundary's pressure to satisfy the no-flow assumption. Adsorption/desorption, gas slippage and diffusion effects are included for rigorous modeling of flow in shale. Sensitivity analysis results suggest that larger desorption coefficient causes smaller pressure and its derivative as a larger proportion of gas is desorbed in formation and contributes to productivity. The influences of other parameters, such as matrix II permeability, matrix block size, secondary fracture permeability, hydraulic fracture conductivity, and fracture pattern are also discussed. The second model is for heterogeneous tight sand reservoir with threshold pressure gradient (TPG). The linear flow sub-regions are the same as those of the first model. TPG and pressure drop within the horizontal wellbore are included. Simulation results suggest that TPG affects middle-late time behaviors. Greater TPG results in higher pressure drop and accelerates production decline. But this influence is marginal when TPG is small. Effects of other parameters, such as formation permeability, fracture length, conductivity, and wellbore storage are also investigated. The third model is for heterogeneous reservoir with various fracture damage. In this model, the following possible fracture damage situations are discussed: (1) choked fracture damage (2) partially propped fracture, (3) fracturing fluid leak-off damage, (4) dual or multiple damage effects. Simulation results indicate that choked frature damage influences early-mid time performance. Partially propped section within fracture dominates formation linear flow regime. Only severe matrix impairment near fracture face can have noticeable effects on pressure and rate response. A new parameter, skin factor ratio, is applied to describe the relative magnitude of multiple damage mechanisms. Reservoir heterogeneity and fracture damage make the pressure and rate behaviors deviate significantly from undamaged one but one can distinguish major damage mechanisms even in heterogeneous reservoir.
Download or read book SPE Journal written by and published by . This book was released on 2002 with total page 484 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Reservoir Formation Damage by : Faruk Civan
Download or read book Reservoir Formation Damage written by Faruk Civan and published by Gulf Professional Publishing. This book was released on 2023-04-07 with total page 1097 pages. Available in PDF, EPUB and Kindle. Book excerpt: Reservoir Formation Damage: Fundamentals, Modeling, Assessment, and Mitigation, Fourth Edition gives engineers a structured layout to predict and improve productivity, providing strategies, recent developments and methods for more successful operations. Updated with many new chapters, including completion damage effects for fractured wells, flow assurance, and fluid damage effects, the book will help engineers better tackle today's assets. Additional new chapters include bacterial induced formation damage, new aspects of chemically induced formation damage, and new field application designs and cost assessments for measures and strategies. Additional procedures for unconventional reservoirs get the engineer up to date. Structured to progress through your career, Reservoir Formation Damage, Fourth Edition continues to deliver a trusted source for both petroleum and reservoir engineers. - Covers new applications through case studies and test questions - Bridges theory and practice, with detailed illustrations and a structured progression of chapter topics - Considers environmental aspects, with new content on water control, conformance and produced water reinjection
Book Synopsis Performance Evaluation of Horizontal Wells With Multistage Fractures in Tight Formations by Considering Non-Darcy Effect and Fracture Dynamics by : Liwu Jiang
Download or read book Performance Evaluation of Horizontal Wells With Multistage Fractures in Tight Formations by Considering Non-Darcy Effect and Fracture Dynamics written by Liwu Jiang and published by . This book was released on 2020 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Performance evaluation of fractured wells has attracted increasing attentions since horizontal drilling and hydraulic fracturing technologies have been successfully and efficiently applied in tight formations; however, such an evaluation process is physically complex and mathematically challenging due to the composite effects of non-Darcy flow within fractures and fracture dynamics including complex fracture geometry, fracture network, and stress-sensitive permeability. It is of fundamental and practical importance to evaluate the production performance of a fractured well by taking the aforementioned composite effects into account in a consistent and accurate manner. A new slab source function was developed in the Laplace domain for improving the prediction accuracy on the early time transient pressure response which can take the fracture width into account. The semi-analytical method was used to solve the fluid flow problem through such hydraulic fractures each of which is discretized into small segments, while continuity equations at the interface of such discretized fracture segments were applied to generate the coupled matrix-fracture flow model. The effect of complex fracture geometry and shape-dependent conductivity on the transient pressure response are then examined and discussed. The fracture width is found to affect the early time transient pressure response, while the shape-dependent conductivity imposes a key impact on the transient pressure behaviour for the early and intermediate periods. A coupled matrix-fracture flow model is then proposed and solved in the Laplace domain with consideration of the aforementioned composite effects which may escalate the nonlinearity of the governing equations. An iterative method was developed to deal with the nonlinearity caused by non-Darcy flow in fractures, while the Pedrosa's transform formulation and perturbation technique is used to weaken and linearize the nonlinear effect caused by stress-sensitive permeability. It is found that the non-Darcy effect dominates the early time flow regime, while stress-sensitive effects in fractures and matrix mainly affect the transient pressure response for the intermediate- and late-stage flow regimes. The Laplace-transform difference method was further adopted to extend the current simplified fracture models more closely to reality by taking complex fracture networks into account. The fracture network is first discretized into small segments, and the finite difference method in the Laplace domain can be used to solve the fluid flow problem through such complex fracture systems. Furthermore, the effect of fractal-like discrete fracture network on the transient pressure behaviour can be examined, while the combined effects of complex fracture networks and stress-sensitive permeability can then be analyzed. Transition flow regime is identified for the scenarios with discrete natural fracture networks which can be affected by the stress-sensitive permeability in natural fractures. All the theoretical models have been validated and then extended to field cases. Type curves are generated and beneficial to examine the effect of each factor on the transient behaviour for horizontal wells with multistage fractures in tight formations under various conditions. The discrepancy between the real field pressure data and the traditional type curves without non-Darcy and stress-sensitive effects can be used to evaluate the degree of these two effects. Two new flow regimes including the fluid feed and transition flow regimes occurred in real field pressure tests can be employed to quantify the complexity of the hydraulic and natural fracture networks, respectively.
Book Synopsis Well Production Performance and Well Test Analysis for Hydraulically Fractured Wells by : Yizhu Liao
Download or read book Well Production Performance and Well Test Analysis for Hydraulically Fractured Wells written by Yizhu Liao and published by . This book was released on 1993 with total page 654 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Investigation of Liquid Loading Mechanism Within Hydraulic Fractures in Unconventional/tight Gas Reservoirs and Its Impact on Productivity by : Samarth Agrawal
Download or read book Investigation of Liquid Loading Mechanism Within Hydraulic Fractures in Unconventional/tight Gas Reservoirs and Its Impact on Productivity written by Samarth Agrawal and published by . This book was released on 2013 with total page 528 pages. Available in PDF, EPUB and Kindle. Book excerpt: One of the major challenges in fracturing low permeability/tight/unconventional gas formations is the loss of frac water and well productivity due to fluid entrapment in the matrix or fracture. Field results have indicated that only 15-30% of the frac fluid is recovered at the surface after flow back is initiated. Past studies have suggested that this water is trapped in the rock matrix near the fracture face and remains trapped due to the high capillary pressure in the matrix. Significant efforts have been made in the past to understand the impact of liquid blocking in hydraulically fractured conventional gas wells. Numerous remediation measures such as huff and puff gas cycling, alcohol or surfactant based chemical treatments have been proposed to reduce fracture face damage. However, when considering hydraulic fractures in unconventional reservoirs horizontal wells, the fluid may also be trapped within the fracture itself and may impact the cleanup as well as productivity. This study shows that under typical gas flow rates in tight / shale gas formations, liquid loading within the fractures is likely to occur. Most of the previous simulation studies consider a 2D reservoir model and ignore gravity, considering the high vertical anisotropy (or extremely low vertical permeability) in these tight reservoirs matrix. However, this study presents the results of 3D simulations of liquid loading in hydraulic fractures in horizontal wells, including gravity and capillary pressure effects. Both CMG IMEX and GEM have been used to study this phenomenon in dry and wet gas cases. The impact of drawdown, fracture and reservoir properties on liquid loading and well productivity is presented. Results show that low drawdown, low matrix permeability or low initial gas rates aggravate the liquid loading problem inside the fracture and thereby impact the cleanup and gas productivity during initial production. A clear understanding of the phenomena could help in selection of optimal production facilities and well profile.
Book Synopsis Modern Completion Technology for Oil and Gas Wells by : Ding Zhu
Download or read book Modern Completion Technology for Oil and Gas Wells written by Ding Zhu and published by McGraw Hill Professional. This book was released on 2018-06-01 with total page 337 pages. Available in PDF, EPUB and Kindle. Book excerpt: The latest oil and gas well completion technologies and best practices Increase oil and gas production and maximize revenue generation using the start-to-finish completion procedures contained in this hands-on guide. Written by a pair of energy production experts, Modern Completion Technology for Oil and Gas Wells introduces each technique, shows how it works, and teaches how to deploy it effectively. You will get full explanations of the goals of completion along with detailed examples and case studies that clearly demonstrate how to successfully meet those goals. Modern production methods such as hydraulic fracturing, acid simulation, and intelligent well completions are thoroughly covered. Coverage includes: •Functions and goals of oil and gas well completion •Well completion fundamentals •Completion impact in near-wellbore region to inflow performance •Completions for fracturing •Completions for acid stimulation •Intelligent well completion: downhole monitoring and flow control •Completion designs for production and injection optimization
Book Synopsis Investigation of Liquid Loading Mechanism Within Hydraulic Fractures in Unconventional/tight Gas Reservoirs and Its Impact on Production by : Samarth Agrawal
Download or read book Investigation of Liquid Loading Mechanism Within Hydraulic Fractures in Unconventional/tight Gas Reservoirs and Its Impact on Production written by Samarth Agrawal and published by . This book was released on 2013 with total page 528 pages. Available in PDF, EPUB and Kindle. Book excerpt: One of the major challenges in fracturing low permeability/tight/unconventional gas formations is the loss of frac water and well productivity due to fluid entrapment in the matrix or fracture. Field results have indicated that only 15-30% of the frac fluid is recovered at the surface after flow back is initiated. Past studies have suggested that this water is trapped in the rock matrix near the fracture face and remains trapped due to the high capillary pressure in the matrix. Significant efforts have been made in the past to understand the impact of liquid blocking in hydraulically fractured conventional gas wells. Numerous remediation measures such as huff and puff gas cycling, alcohol or surfactant based chemical treatments have been proposed to reduce fracture face damage. However, when considering hydraulic fractures in unconventional reservoirs horizontal wells, the fluid may also be trapped within the fracture itself and may impact the cleanup as well as productivity. This study shows that under typical gas flow rates in tight/shale gas formations, liquid loading within the fractures is likely to occur. Most of the previous simulation studies consider a 2D reservoir model and ignore gravity, considering the high vertical anisotropy (or extremely low vertical permeability) in these tight reservoirs matrix. However, this study presents the results of 3D simulations of liquid loading in hydraulic fractures in horizontal wells, including gravity and capillary pressure effects. Both CMG IMEX and GEM have been used to study this phenomenon in dry and wet gas cases. The impact of drawdown, fracture and reservoir properties on liquid loading and well productivity is presented. Results show that low drawdown, low matrix permeability or low initial gas rates aggravate the liquid loading problem inside the fracture and thereby impact the cleanup and gas productivity during initial production. A clear understanding of the phenomena could help in selection of optimal production facilities and well profile.
Book Synopsis Performance of Fractured Vertical and Horizontal Wells by : Mauricio Eduardo Villegas
Download or read book Performance of Fractured Vertical and Horizontal Wells written by Mauricio Eduardo Villegas and published by . This book was released on 1997 with total page 184 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Journal of Canadian Petroleum Technology by :
Download or read book The Journal of Canadian Petroleum Technology written by and published by . This book was released on 1999 with total page 398 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Development of Unconventional Reservoirs by : Reza Rezaee
Download or read book Development of Unconventional Reservoirs written by Reza Rezaee and published by MDPI. This book was released on 2020-04-16 with total page 522 pages. Available in PDF, EPUB and Kindle. Book excerpt: The need for energy is increasing and but the production from conventional reservoirs is declining quickly. This requires an economically and technically feasible source of energy for the coming years. Among some alternative future energy solutions, the most reasonable source is from unconventional reservoirs. As the name “unconventional” implies, different and challenging approaches are required to characterize and develop these resources. This Special Issue covers some of the technical challenges for developing unconventional energy sources from shale gas/oil, tight gas sand, and coalbed methane.
