› › Analysis Of The Efficacy Of Carbon Dioxide Sequestration In Depleted Shale Gas Reservoirs

ANALYSIS OF THE EFFICACY OF CARBON DIOXIDE SEQUESTRATION IN DEPLETED SHALE GAS RESERVOIRS.

Author : Ihsan Kulga

Publisher :

Page : pages

File Size : 16,22 MB

Release : 2014

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ISBN :

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Book Description

In this study, the possibility of industrial CO2 storage in shale gas reservoirs is investigated numerically by using one of the most advanced computational simulators in oil and gas industry, PSU-SHALECOMP, which is a compositional dual porosity, dual permeability, multi-phase reservoir simulator. A computationally inexpensive "stimulated reservoir volume" (SRV) model which has the ability to generate a similar behavior of an equivalent discrete fracture network model is defined and implemented. Three different commercial production profiles are history-matched by using the SRV approach effectively. It is re-proved that implementation of the horizontal borehole technology and hydraulic fracturing are the two most important factors that will increase the efficacy of methane production and carbon dioxide injection processes. It is observed that significantly large percentage of the produced gas originates from the fractured zone so as significantly large percentage of the injected gas will end up occupying the pore spaces in the fractured zone. Injection of carbon dioxide into undepleted shale gas reservoirs is not promising because of its ultra-tight permeability characteristics. Injection of carbon dioxide into shale gas reservoirs that have produced approximately 30\% of the initial gas in place is promising. It is observed that when 30\% of shale gas production is achieved, up to 70\% of the depleted gas volume is expected to be replaced by carbon dioxide.The storage capacity of the depleted shale gas reservoir can be increased by injecting carbon dioxide at a rather low rate. A low rate injection of carbon dioxide will increase its residence time in the flow domain increasing its chances for adsorption.If the SRV zones of the production and injection wells are not in direct communication, it is not expected to see carbon dioxide breakthrough at the producing well. It is also investigated that contribution of carbon dioxide in enhancing the shale gas recovery is negligible. The study includes developments of four artificial neural network tools that have different production of methane and injection of carbon dioxide constraints. These four forward tools can produce production and injection profiles of a given system within an error range of 3.83\% to 5.23\%. This part of the study also includes four additional artificial neural network tools that predicts wellbore design and hydraulic fracture characteristics within an error range of 8.24\% to 9.93\%.



Analysis of the Efficacy of Carbon Dioxide Sequestration in Depleted Coalbed Methane Reservoirs

Author : Liyang Liu

Publisher :

Page : pages

File Size : 29,20 MB

Release : 2017

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In this study, the viability of Carbon Dioxide (CO2) sequestration in depleted Coalbed reservoirs is investigated using Computer Modeling Group LTDs (CMG) Compositional & Unconventional Simulator (GEM). This simulator features dual-porosity and dual-permeability functions, and thus best suits the needs of the model intended. In order to imitate a stimulation fracture network around the horizontal well, a Stimulated Reservoir Volume (SRV) approach was implemented. Three different models with varied grid size, matrix properties, production rates, and injection rates were investigated in order to determine proper variable ranges for the Monte Carlo Simulation and the Artificial Neural Network (ANN) study, presented in the later part of the study.With low permeability and porosity, Coalbed methane cannot be easily produced, nor can CO2 be easily injected, without the implementation of fracture stimulation techniques. The SRV approach significantly improved case performances of both CH4 production and CO2 injection [1]. With varied production sand face pressure, production rates for each of the cases will be different. However, producers will be shut-in at a uniform minimum production rate of 300 MSCFD, followed by the opening of injectors at the same well location. Injection performances will be evaluated in this study.During the final stage of this study, three Artificial Neural Network tools were developed in order to predict various sets of data using combinations of input variables. The first tool can predict production and injection profiles of a given system with error very close or less than 20%. The second tool can predict wellbore design parameters and fracture characteristics with error less than 20%. The third tool can predict formation characteristics with error less than 20%, with the exception of one variable having larger error, yet within acceptable range.



Interdisciplinary Investigation of CO2 Sequestration in Depleted Shale Gas Formations

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Page : 166 pages

File Size : 20,73 MB

Release : 2013

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This project investigates the feasibility of geologic sequestration of CO2 in depleted shale gas reservoirs from an interdisciplinary viewpoint. It is anticipated that over the next two decades, tens of thousands of wells will be drilled in the 23 states in which organic-rich shale gas deposits are found. This research investigates the feasibility of using these formations for sequestration. If feasible, the number of sites where CO2 can be sequestered increases dramatically. The research embraces a broad array of length scales ranging from the ~10 nanometer scale of the pores in the shale formations to reservoir scale through a series of integrated laboratory and theoretical studies.



Mechanisms for CO2 Sequestration in Geological Formations and Enhanced Gas Recovery

Author : Roozbeh Khosrokhavar

Publisher : Springer

Page : 106 pages

File Size : 34,88 MB

Release : 2015-10-28

Category : Technology & Engineering

ISBN : 3319230875

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Book Description

This book gives background information why shale formations in the world are important both for storage capacity and enhanced gas recovery (EGR). Part of this book investigates the sequestration capacity in geological formations and the mechanisms for the enhanced storage rate of CO2 in an underlying saline aquifer. The growing concern about global warming has increased interest in geological storage of carbon dioxide (CO2). The main mechanism of the enhancement, viz., the occurrence of gravity fingers, which are the vehicles of enhanced transport in saline aquifers, can be visualized using the Schlieren technique. In addition high pressure experiments confirmed that the storage rate is indeed enhanced in porous media. The book is appropriate for graduate students, researchers and advanced professionals in petroleum and chemical engineering. It provides the interested reader with in-depth insights into the possibilities and challenges of CO2 storage and the EGR prospect.



Carbon Dioxide Sequestration in Geological Media

Author : Matthias Grobe

Publisher : AAPG

Page : 702 pages

File Size : 28,67 MB

Release : 2010-03-01

Category : Science

ISBN : 0891810668

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Book Description

Over the past 20 years, the concept of storing or permanently storing carbon dioxide in geological media has gained increasing attention as part of the important technology option of carbon capture and storage within a portfolio of options aimed at reducing anthropogenic emissions of greenhouse gases to the earths atmosphere. This book is structured into eight parts, and, among other topics, provides an overview of the current status and challenges of the science, regional assessment studies of carbon dioxide geological sequestration potential, and a discussion of the economics and regulatory aspects of carbon dioxide sequestration.



Negative Emissions Technologies and Reliable Sequestration

Author : National Academies of Sciences, Engineering, and Medicine

Publisher : National Academies Press

Page : 511 pages

File Size : 18,49 MB

Release : 2019-04-08

Category : Science

ISBN : 0309484529

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Book Description

To achieve goals for climate and economic growth, "negative emissions technologies" (NETs) that remove and sequester carbon dioxide from the air will need to play a significant role in mitigating climate change. Unlike carbon capture and storage technologies that remove carbon dioxide emissions directly from large point sources such as coal power plants, NETs remove carbon dioxide directly from the atmosphere or enhance natural carbon sinks. Storing the carbon dioxide from NETs has the same impact on the atmosphere and climate as simultaneously preventing an equal amount of carbon dioxide from being emitted. Recent analyses found that deploying NETs may be less expensive and less disruptive than reducing some emissions, such as a substantial portion of agricultural and land-use emissions and some transportation emissions. In 2015, the National Academies published Climate Intervention: Carbon Dioxide Removal and Reliable Sequestration, which described and initially assessed NETs and sequestration technologies. This report acknowledged the relative paucity of research on NETs and recommended development of a research agenda that covers all aspects of NETs from fundamental science to full-scale deployment. To address this need, Negative Emissions Technologies and Reliable Sequestration: A Research Agenda assesses the benefits, risks, and "sustainable scale potential" for NETs and sequestration. This report also defines the essential components of a research and development program, including its estimated costs and potential impact.





Geologic Carbon Sequestration

Author : V. Vishal

Publisher : Springer

Page : 336 pages

File Size : 38,16 MB

Release : 2016-05-11

Category : Science

ISBN : 3319270192

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Book Description

This exclusive compilation written by eminent experts from more than ten countries, outlines the processes and methods for geologic sequestration in different sinks. It discusses and highlights the details of individual storage types, including recent advances in the science and technology of carbon storage. The topic is of immense interest to geoscientists, reservoir engineers, environmentalists and researchers from the scientific and industrial communities working on the methodologies for carbon dioxide storage. Increasing concentrations of anthropogenic carbon dioxide in the atmosphere are often held responsible for the rising temperature of the globe. Geologic sequestration prevents atmospheric release of the waste greenhouse gases by storing them underground for geologically significant periods of time. The book addresses the need for an understanding of carbon reservoir characteristics and behavior. Other book volumes on carbon capture, utilization and storage (CCUS) attempt to cover the entire process of CCUS, but the topic of geologic sequestration is not discussed in detail. This book focuses on the recent trends and up-to-date information on different storage rock types, ranging from deep saline aquifers to coal to basaltic formations.