New Advances in Shale Gas Reservoir Analysis Using Water Flowback Data
New Advances in Shale Gas Reservoir Analysis Using Water Flowback Data

Author: Ahmad Alkouh

Publisher:

Published: 2015

Total Pages:

ISBN-13:

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Shale gas reservoirs with multistage hydraulic fractures are commonly characterized by analyzing long-term gas production data, but water flowback data is usually not included in the analysis. However, this work shows there can be benefits to including post-frac water flowback and long-term water production data in well analysis. In addition, field data indicate that only 10-40% of the frac water is recovered after the flowback. This work addresses two main question: Where is the rest of the injected frac fluid that is not recovered and what is the mechanism that is trapping it? And how can the water flowback data be used in estimating effective fracture volume using production data analysis tools? A number of simulation cases were run for single and two phase (gas/water) for modeling flowback and long-term production periods. Various physical assumptions were investigated for the saturations and properties that exist in the fracture/matrix system after hydraulic fracturing. The results of these simulations were compared with analytical solutions and data from actual wells using diagnostic and specialized plots. The results of these comparisons led to certain conclusions and procedures describing possible reservoir conditions after hydraulic fracturing and during production. Past publications have suggested that the lost frac water is trapped in the natural fracture or imbibed into the rock matrix near the fracture face. Natural fracture spacing could be a possible explanation of the lost frac water. These concepts are tested and the challenge of simulating a natural fracture with trapped water without imbibition is solved using a new hybrid relative permeability jail. This concept was tested for the period of flowback, shut-in and production. This work presents the benefits of a new method for combining water flowback and long-term water production data in shale gas analysis. Water production analysis can provide effective fracture volume which was confirmed by the cumulative produced water. This will help when evaluating fracture-stimulation jobs. It also shows the benefits of combining flowback and long-term water production data in the analysis of shale gas wells. In some cases, the time shift on diagnostic plots changes the apparent flow regime identification of early gas production data. This leads to different models of the fracture/matrix system. The presented work shows the importance of collecting and including water flowback data in long-term production data. The electronic version of this dissertation is accessible from http://hdl.handle.net/1969.1/152548

Unconventional Shale Gas Exploration and Exploitation
Unconventional Shale Gas Exploration and Exploitation

Author: Annapurna Boruah

Publisher: Springer Nature

Published: 2024-01-04

Total Pages: 113

ISBN-13: 3031487273

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From the geological mysteries of shale formations to cutting-edge techniques in gas extraction, this book unveils the essential knowledge to harness the potential of shale gas. The book integrates various data types such as outcrop, well logs, core data, etc.) for hydrofracturing—from basin-scale to nano-pore-scale. The book included a wealth of information on the latest advancements, industry practices, environmental considerations, policies, and more. In a world increasingly conscious of environmental concerns, "Cleaner Energy from the Earth" offers a fresh perspective on the utilization of shale gas as a cleaner fossil fuel alternative. This comprehensive book takes the reader on a captivating journey through the science, technology, and innovation driving shale gas exploration and exploitation towards a greener future. Whether you're a seasoned industry professional, a student, or a curious reader, this book provides a comprehensive and accessible resource for all levels of expertise.

Analysis of Natural Gas Production and Fracture Fluids Flowback in Marcellus Shale Using Data Mining Approaches
Analysis of Natural Gas Production and Fracture Fluids Flowback in Marcellus Shale Using Data Mining Approaches

Author: Qiumei Zhou

Publisher:

Published: 2017

Total Pages:

ISBN-13:

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Marcellus has been development for more than a decade with the application of multi-staged hydraulically fractured horizontal well technology. The technology requires pumping large amount of fracture-fluids and proppant into the target formation at high pressure. The fracture-fluid will then be recovered as aqueous phase during the flowback periods after well shut-in, which can be treated and reused. Sweet spot identification and efficient fracture-fluid flowback management are keys requirement for sustainable and economic development of Marcellus Shale, which can be benefited greatly by optimizing drilling and completion practices, including accurate fracture-fluids flowback prediction. In this work, a systematic study of the geology and engineering factors that influence fracture-fluids flowback, water production, and gas recovery was developed. The complex correlations between gas production and fracture-fluids flowback and produced water provide more understanding about flow mechanism in shale gas. The results suggest that the numbers of hydraulic fracturing stages and well lateral length have significant influence on gas production. The shut-in time and injected proppant volume have the most influence on fracture-fluids flowback. The correlations between gas and fracture-fluid flowback and produced water were different under certain geological conditions and time periods. These knowledges from previous results were used to develop economic analysis regional scale.This work not only will provide the new insights about shale gas well production and fracture-fluid flowback, but also provide a new idea for how to effectively analyze limited field recorded data and to identify the true story behind data.

Unconventional Shale Gas Development
Unconventional Shale Gas Development

Author: Rouzbeh G. Moghanloo

Publisher: Gulf Professional Publishing

Published: 2022-02-23

Total Pages: 498

ISBN-13: 0323905293

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Unconventional Shale Gas Development: Lessons Learned gives engineers the latest research developments and practical applications in today’s operations. Comprised of both academic and corporate contributors, a balanced critical review on technologies utilized are covered. Environmental topics are presented, including produced water management and sustainable operations in gas systems. Machine learning applications, well integrity and economic challenges are also covered to get the engineer up-to-speed. With its critical elements, case studies, history plot visuals and flow charts, the book delivers a critical reference to get today’s petroleum engineers updated on the latest research and applications surrounding shale gas systems. Bridges the gap between the latest research developments and practical applications through case studies and workflow charts Helps readers understand the latest developments from the balanced viewpoint of academic and corporate contributors Considers environmental and sustainable operations in shale gas systems, including produced water management

Well Production Performance Analysis for Shale Gas Reservoirs
Well Production Performance Analysis for Shale Gas Reservoirs

Author: Liehui Zhang

Publisher: Elsevier

Published: 2019-05-16

Total Pages: 388

ISBN-13: 0444643168

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Well Production Performance Analysis for Shale Gas Reservoirs, Volume 66 presents tactics and discussions that are urgently needed by the petroleum community regarding unconventional oil and gas resources development and production. The book breaks down the mechanics of shale gas reservoirs and the use of mathematical models to analyze their performance. Features an in-depth analysis of shale gas horizontal fractured wells and how they differ from their conventional counterparts Includes detailed information on the testing of fractured horizontal wells before and after fracturing Offers in-depth analysis of numerical simulation and the importance of this tool for the development of shale gas reservoirs

Shale Gas
Shale Gas

Author: Ali Al-Juboury

Publisher: BoD – Books on Demand

Published: 2018-08-29

Total Pages: 112

ISBN-13: 1789236185

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Natural gas, particularly shale gas, is one of the main sustainable energy sources in the current century. It is an abundant energy resource, playing an active role in future energy demand and enabling nations to transition to higher support on renewable energy sources. The book aims to add some contributions and new advances in technologies and prospects on shale gas reserves in selected regions of the world, in terms of new technologies of extraction, new discoveries of promising reserves, synthesis and applications to get high quality of this cleanest consuming non-renewable energy source.

Integrative Understanding of Shale Gas Reservoirs
Integrative Understanding of Shale Gas Reservoirs

Author: Kun Sang Lee

Publisher: Springer

Published: 2016-02-03

Total Pages: 131

ISBN-13: 331929296X

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This timely book begins with an overview of shale gas reservoir features such as natural fracture systems, multi-fractured horizontal wells, adsorption/desorption of methane, and non-linear flow within the reservoir. Geomechanical modelling, an aspect of importance in ultra-low permeability reservoirs, is also presented in detail. Taking these complex features of shale reservoirs into account, the authors develop a numerical model, which is verified with field data using the history matching technique. Based on this model, the pressure transient and production characteristics of a fractured horizontal well in a shale gas reservoir are analysed with respect to reservoir and fracture properties. Methods for the estimation of shale properties are also detailed. Minifrac tests, rate transient tests (RTA), and type curve matching are used to estimate the initial pressure, permeability, and fracture half-length. Lastly, future technologies such as the technique of injecting CO2 into shale reservoirs are presented. The book will be of interest to industrial practitioners, as well as to academics and graduate students in the field of reservoir engineering.

Characterization, Treatment, and Beneficial Use of Shale Gas Flowback and Produced Water
Characterization, Treatment, and Beneficial Use of Shale Gas Flowback and Produced Water

Author: Guanyu Ma

Publisher:

Published: 2015

Total Pages: 260

ISBN-13:

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Shale gas has become one of the most rapidly developing natural gas, providing approximately half of the natural gas for the U.S. Together with the development of shale gas exploration, large quantity of flowback and produced water is being produced. Management of flowback and produced water has become one of the most challenging issues for shale gas operators. Traditional disposal of flowback and produced water is challenged by the increased freshwater demand, water shortage, and more restraining regulations. Beneficial reuse of flowback and produced water is becoming a more attractive option, as it reduces freshwater demand for hydraulic fracturing, minimizes disposal costs, and helps to meet regulations. This study aimed to develop a decision-support tool for shale gas produced water management, treatment and beneficial use. Water quality and quantity data were retrieved from national produced water database and industrial database. Treatment technologies were critically reviewed about their capacities to treat shale gas flowback and produced water. A case study was conducted to evaluate shale gas flowback and produced water beneficial use potentials in Tioga County and Washington County in Marcellus Shale, Pennsylvania. The results showed that the costs of produced water treatment and beneficial use decreased significantly as the treated water flow rate increased. Produced water reuse is more cost-efficient than deep well injection when flowback and produced water from a cluster of wells collected together, and treated in a satellite facility. Small operators are recommended to cooperate to treat and reuse shale gas wastewater together to be more cost-effective. In addition to monetary benefits, reuse of flowback and produced water also augments water resources, reduces the industry reliance on local water supplies, decreases the risks of wastewater spill, remits traffic load and road wearing, helps to meet regulations and policies, and reduces public concerns.

Unconventional Hydrocarbon Resources
Unconventional Hydrocarbon Resources

Author: Reza Barati

Publisher: John Wiley & Sons

Published: 2020-11-11

Total Pages: 608

ISBN-13: 1119420490

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A comprehensive textbook presenting techniques for the analysis and characterization of shale plays Significant reserves of hydrocarbons cannot be extracted using conventional methods. Improvements in techniques such as horizontal drilling and hydraulic fracturing have increased access to unconventional hydrocarbon resources, ushering in the “shale boom” and disrupting the energy sector. Unconventional Hydrocarbon Resources: Techniques for Reservoir Engineering Analysis covers the geochemistry, petrophysics, geomechanics, and economics of unconventional shale oil plays. The text uses a step-by-step approach to demonstrate industry-standard workflows for calculating resource volume and optimizing the extraction process. Volume highlights include: Methods for rock and fluid characterization of unconventional shale plays A workflow for analyzing wells with stimulated reservoir volume regions An unconventional approach to understanding of fluid flow through porous media A comprehensive summary of discoveries of massive shale resources worldwide Data from Eagle Ford, Woodford, Wolfcamp, and The Bakken shale plays Examples, homework assignments, projects, and access to supplementary online resources Hands-on teaching materials for use in petroleum engineering software applications The American Geophysical Union promotes discovery in Earth and space science for the benefit of humanity. Its publications disseminate scientific knowledge and provide resources for researchers, students, and professionals.

Challenges in Modelling and Simulation of Shale Gas Reservoirs
Challenges in Modelling and Simulation of Shale Gas Reservoirs

Author: Jebraeel Gholinezhad

Publisher: Springer

Published: 2017-12-27

Total Pages: 96

ISBN-13: 3319707698

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This book addresses the problems involved in the modelling and simulation of shale gas reservoirs, and details recent advances in the field. It discusses various modelling and simulation challenges, such as the complexity of fracture networks, adsorption phenomena, non-Darcy flow, and natural fracture networks, presenting the latest findings in these areas. It also discusses the difficulties of developing shale gas models, and compares analytical modelling and numerical simulations of shale gas reservoirs with those of conventional reservoirs. Offering a comprehensive review of the state-of-the-art in developing shale gas models and simulators in the upstream oil industry, it allows readers to gain a better understanding of these reservoirs and encourages more systematic research on efficient exploitation of shale gas plays. It is a valuable resource for researchers interested in the modelling of unconventional reservoirs and graduate students studying reservoir engineering. It is also of interest to practising reservoir and production engineers.