Influence of Topography on in Situ Stress: Potential Effect on Hydraulic Fracturing and Field Drilling in Tight Gas Reservoirs

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ISBN 13 :
Total Pages : 136 pages
Book Rating : 4.:/5 (653 download)

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Book Synopsis Influence of Topography on in Situ Stress: Potential Effect on Hydraulic Fracturing and Field Drilling in Tight Gas Reservoirs by : Carlos Eduardo Wild

Download or read book Influence of Topography on in Situ Stress: Potential Effect on Hydraulic Fracturing and Field Drilling in Tight Gas Reservoirs written by Carlos Eduardo Wild and published by . This book was released on 2006 with total page 136 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Environmental Impacts of Hydraulic Fracturing

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Publisher : CRC Press
ISBN 13 : 146651468X
Total Pages : 465 pages
Book Rating : 4.4/5 (665 download)

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Book Synopsis Environmental Impacts of Hydraulic Fracturing by : Frank R. Spellman

Download or read book Environmental Impacts of Hydraulic Fracturing written by Frank R. Spellman and published by CRC Press. This book was released on 2012-09-17 with total page 465 pages. Available in PDF, EPUB and Kindle. Book excerpt: There is a strong need for innovation and the development of viable renewable energy sources. Recent technological advances now allow natural gas supplies—previously believed inaccessible or nonexistent—to be discovered, mined, and processed for both industrial and consumer use. The technology, a controversial process that is alternatively called hydraulic fracturing, fracking, fracing, or hydrofracking, has greatly expanded natural gas production in the United States. Presenting a balanced discussion, Environmental Impacts of Hydraulic Fracturing is a comprehensive guide to all aspects of hydraulic fracturing used to extract natural gas, along with gas exploration and production in various shale fields. As the use of hydraulic fracturing has grown, concerns about its environmental and public health impacts have also increased—one of the most significant concerns being the fluids that are injected into rock formations to cause the fracturing contain potentially hazardous chemical additives. The book covers all facets of the issue, including ongoing controversies about the environmental and operator safety issues arising from possible water pollution, drinking water contamination, on-the-job safety hazards, and harmful chemical exposure to workers and residents near well areas. The author discusses both the pros and cons of hydraulic fracturing, explaining the process in great detail. He describes the benefits of hydraulic fracturing and its importance in making the United States energy independent by drilling for its own resources, as well as the potential impacts to the surrounding environment. The text also includes suggestions and recommendations on how to mitigate environmental damage. Arguably the first book of its kind, this is the go-to text on the use and impacts of hydraulic fracturing.

Exploitation of Unconventional Oil and Gas Resources

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Publisher :
ISBN 13 : 1838811079
Total Pages : 152 pages
Book Rating : 4.8/5 (388 download)

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Book Synopsis Exploitation of Unconventional Oil and Gas Resources by : Kenneth Imo-Imo Israel Eshiet

Download or read book Exploitation of Unconventional Oil and Gas Resources written by Kenneth Imo-Imo Israel Eshiet and published by . This book was released on 2019-07-10 with total page 152 pages. Available in PDF, EPUB and Kindle. Book excerpt: The stimulation of unconventional hydrocarbon reservoirs is proven to improve their productivity to an extent that has rendered them economically viable. Generally, the stimulation design is a complex process dependent on intertwining factors such as the history of the formation, rock and reservoir fluid type, lithology and structural layout of the formation, cost, time, etc. A holistic grasp of these can be daunting, especially for people without sufficient experience and/or expertise in the exploitation of unconventional hydrocarbon reserves. This book presents the key facets integral to producing unconventional resources, and how the different components, if pieced together, can be used to create an integrated stimulation design. Areas covered are as follows: • stimulation methods, • fracturing fluids, • mixing and behavior of reservoir fluids, • assessment of reservoir performance, • integration of surface drilling data, • estimation of geomechanical properties and hydrocarbon saturation, and • health and safety. Exploitation of Unconventional Oil and Gas Resources: Hydraulic Fracturing and Other Recovery and Assessment Techniques is an excellent introduction to the subject area of unconventional oil and gas reservoirs, but it also complements existing information in the same discipline. It is an essential text for higher education students and professionals in academia, research, and the industry.

Numerical Simulation of the Environmental Impact of Hydraulic Fracturing of Tight/shale Gas Reservoirs on Near-surface Groundwater

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Publisher :
ISBN 13 :
Total Pages : 31 pages
Book Rating : 4.:/5 (925 download)

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Book Synopsis Numerical Simulation of the Environmental Impact of Hydraulic Fracturing of Tight/shale Gas Reservoirs on Near-surface Groundwater by :

Download or read book Numerical Simulation of the Environmental Impact of Hydraulic Fracturing of Tight/shale Gas Reservoirs on Near-surface Groundwater written by and published by . This book was released on 2015 with total page 31 pages. Available in PDF, EPUB and Kindle. Book excerpt: Hydrocarbon production from unconventional resources and the use of reservoir stimulation techniques, such as hydraulic fracturing, has grown explosively over the last decade. However, concerns have arisen that reservoir stimulation creates significant environmental threats through the creation of permeable pathways connecting the stimulated reservoir with shallower freshwater aquifers, thus resulting in the contamination of potable groundwater by escaping hydrocarbons or other reservoir fluids. This study investigates, by numerical simulation, gas and water transport between a shallow tight-gas reservoir and a shallower overlying freshwater aquifer following hydraulic fracturing operations, if such a connecting pathway has been created. We focus on two general failure scenarios: (1) communication between the reservoir and aquifer via a connecting fracture or fault and (2) communication via a deteriorated, preexisting nearby well. We conclude that the key factors driving short-term transport of gas include high permeability for the connecting pathway and the overall volume of the connecting feature. Production from the reservoir is likely to mitigate release through reduction of available free gas and lowering of reservoir pressure, and not producing may increase the potential for release. We also find that hydrostatic tight-gas reservoirs are unlikely to act as a continuing source of migrating gas, as gas contained within the newly formed hydraulic fracture is the primary source for potential contamination. Such incidents of gas escape are likely to be limited in duration and scope for hydrostatic reservoirs. Reliable field and laboratory data must be acquired to constrain the factors and determine the likelihood of these outcomes.

Emerging Technologies in Hydraulic Fracturing and Gas Flow Modelling

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Publisher : BoD – Books on Demand
ISBN 13 : 1839684666
Total Pages : 174 pages
Book Rating : 4.8/5 (396 download)

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Book Synopsis Emerging Technologies in Hydraulic Fracturing and Gas Flow Modelling by : Kenneth Imo-Imo Israel Eshiet

Download or read book Emerging Technologies in Hydraulic Fracturing and Gas Flow Modelling written by Kenneth Imo-Imo Israel Eshiet and published by BoD – Books on Demand. This book was released on 2022-11-02 with total page 174 pages. Available in PDF, EPUB and Kindle. Book excerpt: Emerging Technologies in Hydraulic Fracturing and Gas Flow Modelling features the latest strategies for exploiting depleted and unconventional petroleum rock formations as well as simulating associated gas flow mechanisms. The book covers a broad range of multivarious stimulation methods currently applied in practice. It introduces new stimulation techniques including a comprehensive description of interactions between formation/hydraulic fracturing fluids and the host rock material. It provides further insight into practices aimed at advancing the operation of hydrocarbon reservoirs and can be used either as a standalone resource or in combination with other related literature. The book can serve as a propaedeutic resource and is appropriate for those seeking rudimentary information on the exploitation of ultra-impermeable oil and gas reservoirs. Professionals and researchers in the field of petroleum, civil, oil and gas, geotechnical and geological engineering who are interested in the production of unconventional petroleum resources as well as students undertaking studies in similar subject areas will find this to be an instructional reference.

Optimazation of hydraulic fracturing in tight gas reservoirs with alternative fluid

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Publisher : Cuvillier Verlag
ISBN 13 : 3736964722
Total Pages : 160 pages
Book Rating : 4.7/5 (369 download)

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Book Synopsis Optimazation of hydraulic fracturing in tight gas reservoirs with alternative fluid by : Faisal Mehmood

Download or read book Optimazation of hydraulic fracturing in tight gas reservoirs with alternative fluid written by Faisal Mehmood and published by Cuvillier Verlag. This book was released on 2021-07-26 with total page 160 pages. Available in PDF, EPUB and Kindle. Book excerpt: Due to the finite nature of petroleum resources and depletion of conventional reservoirs, the exploitation of unconventional resources has been a key to meeting world energy needs. Natural gas, a cleaner fossil fuel compared to oil and coal, has an increasing role in the energy mix. It is expected that the peak global natural gas production will remain between 3.7-6.1 trillion m3 per year between 2019 and 2060. Therefore, addressing the technical challenges posed by reservoir exploitation technologies in an environmentally responsible manner is critical for efficient energy production and energy secure of the world.

Prediction of Horizontal In-situ Stress in Shale Gas Reservoirs Based on Artificial Neural Networks and Conventional Rock Mechanics

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Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (141 download)

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Book Synopsis Prediction of Horizontal In-situ Stress in Shale Gas Reservoirs Based on Artificial Neural Networks and Conventional Rock Mechanics by : Yifan Du

Download or read book Prediction of Horizontal In-situ Stress in Shale Gas Reservoirs Based on Artificial Neural Networks and Conventional Rock Mechanics written by Yifan Du and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Shale gas is one of the most important unconventional fossil fuel resources. It is usually developed by horizontal drilling and hydraulic fracturing techniques. The in-situ stress magnitude distribution in a given shale gas field is a significant factor that should be considered by horizontal drilling and hydraulic fracturing. However, the accurate determination of in-situ stresses is normally hindered by the lack of experimental data. Aiming to address this issue, this thesis proposes a method of combining artificial intelligence and conventional rock mechanics to predict the in-situ stress magnitudes in a given shale gas reservoir based on the logging data. Since the experimental in-situ stress data are not sufficiently large to serve as the training dataset, this thesis selects the data in two wells for which the calculated in-situ stress magnitudes are in good agreement with the measured in-situ stress magnitudes as the training samples. Empirical rock-mechanics equations are used to generate more training data based on the data collected from these two wells. Then, a 4-layer artificial neural network model is established to predict the magnitudes of horizontal in-situ stresses in other wells. The results show that the predicted maximum horizontal in-situ stress magnitudes and predicted minimum horizontal in-situ stress magnitudes agree well with the measured data. Finally, a series of 3D maps showing the horizontal in-situ stress distributions in one shale gas reservoir in the Longmaxi formation of Sichuan (China) have been plotted by the newly developed neural network model.

Plan to Study the Potential Impacts of Hydraulic Fracturing on Drinking Water Resources

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Publisher : CreateSpace
ISBN 13 : 9781507587553
Total Pages : 190 pages
Book Rating : 4.5/5 (875 download)

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Book Synopsis Plan to Study the Potential Impacts of Hydraulic Fracturing on Drinking Water Resources by : U. S. Environmental Agency

Download or read book Plan to Study the Potential Impacts of Hydraulic Fracturing on Drinking Water Resources written by U. S. Environmental Agency and published by CreateSpace. This book was released on 2015-01-16 with total page 190 pages. Available in PDF, EPUB and Kindle. Book excerpt: Natural gas plays a key role in our nation's clean energy future. Recent advances in drilling technologies-including horizontal drilling and hydraulic fracturing-have made vast reserves of natural gas economically recoverable in the US. Responsible development of America's oil and gas resources offers important economic, energy security, and environmental benefits. Hydraulic fracturing is a well stimulation technique used to maximize production of oil and natural gas in unconventional reservoirs, such as shale, coalbeds, and tight sands. During hydraulic fracturing, specially engineered fluids containing chemical additives and proppant are pumped under high pressure into the well to create and hold open fractures in the formation. These fractures increase the exposed surface area of the rock in the formation and, in turn, stimulate the flow of natural gas or oil to the wellbore. As the use of hydraulic fracturing has increased, so have concerns about its potential environmental and human health impacts. Many concerns about hydraulic fracturing center on potential risks to drinking water resources, although other issues have been raised. In response to public concern, the US Congress directed the US Environmental Protection Agency (EPA) to conduct scientific research to examine the relationship between hydraulic fracturing and drinking water resources. This study plan represents an important milestone in responding to the direction from Congress. EPA is committed to conducting a study that uses the best available science, independent sources of information, and a transparent, peer-reviewed process that will ensure the validity and accuracy of the results. The Agency will work in consultation with other federal agencies, state and interstate regulatory agencies, industry, non-governmental organizations, and others in the private and public sector in carrying out this study. Stakeholder outreach as the study is being conducted will continue to be a hallmark of our efforts, just as it was during the development of this study plan. The overall purpose of this study is to elucidate the relationship, if any, between hydraulic fracturing and drinking water resources. More specifically, the study has been designed to assess the potential impacts of hydraulic fracturing on drinking water resources and to identify the driving factors that affect the severity and frequency of any impacts. Based on the increasing development of shale gas resources in the US, and the comments EPA received from stakeholders, this study emphasizes hydraulic fracturing in shale formations. Portions of the research, however, are also intended to provide information on hydraulic fracturing in coalbed methane and tight sand reservoirs. The scope of the research includes the hydraulic fracturing water use lifecycle, which is a subset of the greater hydrologic cycle. For the purposes of this study, the hydraulic fracturing water lifecycle begins with water acquisition from surface or ground water and ends with discharge into surface waters or injection into deep wells. Specifically, the water lifecycle for hydraulic fracturing consists of water acquisition, chemical mixing, well injection, flowback and produced water (collectively referred to as "hydraulic fracturing wastewater"), and wastewater treatment and waste disposal.

Study of the Potential Impacts of Hydraulic Fracturing on Drinking Water Resources

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Publisher : CreateSpace
ISBN 13 : 9781507587270
Total Pages : 276 pages
Book Rating : 4.5/5 (872 download)

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Book Synopsis Study of the Potential Impacts of Hydraulic Fracturing on Drinking Water Resources by : U. S. Environmental Agency

Download or read book Study of the Potential Impacts of Hydraulic Fracturing on Drinking Water Resources written by U. S. Environmental Agency and published by CreateSpace. This book was released on 2015-01-16 with total page 276 pages. Available in PDF, EPUB and Kindle. Book excerpt: Natural gas plays a key role in our nation's clean energy future. The United States has vast reserves of natural gas that are commercially viable as a result of advances in horizontal drilling and hydraulic fracturing technologies, which enable greater access to gas in rock formations deep underground. These advances have spurred a significant increase in the production of both natural gas and oil across the country. Responsible development of America's oil and gas resources offers important economic, energy security, and environmental benefits. However, as the use of hydraulic fracturing has increased, so have concerns about its potential human health and environmental impacts, especially for drinking water. In response to public concern, the US House of Representatives requested that the US Environmental Protection Agency (EPA) conduct scientific research to examine the relationship between hydraulic fracturing and drinking water resources. In 2011, the EPA began research under its Plan to Study the Potential Impacts of Hydraulic Fracturing on Drinking Water Resources. The purpose of the study is to assess the potential impacts of hydraulic fracturing on drinking water resources, if any, and to identify the driving factors that may affect the severity and frequency of such impacts. Scientists are focusing primarily on hydraulic fracturing of shale formations to extract natural gas, with some study of other oil-and gas-producing formations, including tight sands, and coalbeds. The EPA has designed the scope of the research around five stages of the hydraulic fracturing water cycle. Each stage of the cycle is associated with a primary research question: Water acquisition: What are the possible impacts of large volume water withdrawals from ground and surface waters on drinking water resources? Chemical mixing: What are the possible impacts of hydraulic fracturing fluid surface spills on or near well pads on drinking water resources? Well injection: What are the possible impacts of the injection and fracturing process on drinking water resources? Flowback and produced water: What are the possible impacts of flowback and produced water (collectively referred to as "hydraulic fracturing wastewater") surface spills on or near well pads on drinking water resources? Wastewater treatment and waste disposal: What are the possible impacts of inadequate treatment of hydraulic fracturing wastewater on drinking water resources? This report describes 18 research projects underway to answer these research questions and presents the progress made as of September 2012 for each of the projects. Information presented as part of this report cannot be used to draw conclusions about potential impacts to drinking water resources from hydraulic fracturing. The research projects are organized according to five different types of research activities: analysis of existing data, scenario evaluations, laboratory studies, toxicity assessments, and case studies.

The Development and Evaluation of a Field Method for In-situ Stress Determination Using Hydraulic Fracturing

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Publisher :
ISBN 13 :
Total Pages : 598 pages
Book Rating : 4.:/5 (319 download)

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Book Synopsis The Development and Evaluation of a Field Method for In-situ Stress Determination Using Hydraulic Fracturing by : Jean-Claude Roegiers

Download or read book The Development and Evaluation of a Field Method for In-situ Stress Determination Using Hydraulic Fracturing written by Jean-Claude Roegiers and published by . This book was released on 1974 with total page 598 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Deep Stress Probe, a special field tool, has been developed for use in determining in-situ stresses at great depth in rock masses. The tool, adapted from oil well logging equipment, features orientation and downhole pressure recording components and needs only one lowering for each complete measurement at a certain horizon. A Laboratory technique was developed to control fracture propagation in laboratory tests simulating practical hydraulic fracturing situations. These studies reveal that permeability may increase dramatically prior to macroscopic fracture in hydraulic fracturing. This is very significant and allows a better understanding of the factors affecting the breakdown pressure (rate of loading, viscosity of fracturing fluid).

Reservoir Stimulation

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Publisher :
ISBN 13 :
Total Pages : 448 pages
Book Rating : 4.3/5 (91 download)

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Book Synopsis Reservoir Stimulation by : Michael J. Economides

Download or read book Reservoir Stimulation written by Michael J. Economides and published by . This book was released on 1989 with total page 448 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Estimating In-situ Stresses and Rock Mass Properties from Geological and Geophysical Data

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Publisher :
ISBN 13 :
Total Pages : 33 pages
Book Rating : 4.:/5 (792 download)

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Book Synopsis Estimating In-situ Stresses and Rock Mass Properties from Geological and Geophysical Data by : Donald F. Towse

Download or read book Estimating In-situ Stresses and Rock Mass Properties from Geological and Geophysical Data written by Donald F. Towse and published by . This book was released on 1983 with total page 33 pages. Available in PDF, EPUB and Kindle. Book excerpt:

The Effects of Induced Hydraulic Fracturing on the Environment

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Publisher : CRC Press
ISBN 13 : 148223095X
Total Pages : 356 pages
Book Rating : 4.4/5 (822 download)

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Book Synopsis The Effects of Induced Hydraulic Fracturing on the Environment by : Matthew McBroom

Download or read book The Effects of Induced Hydraulic Fracturing on the Environment written by Matthew McBroom and published by CRC Press. This book was released on 2013-12-07 with total page 356 pages. Available in PDF, EPUB and Kindle. Book excerpt: This title includes a number of Open Access chapters.Hydraulic fracturing, or "fracking" as it is commonly known, refers to the practice of using liquids at very high pressures to fragment rock, thereby allowing natural gas to be harvested. This process increases energy resources but also has some negative environmental impacts as well. This book l

Geomechanical Studies of the Barnett Shale, Texas, USA

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Publisher : Stanford University
ISBN 13 :
Total Pages : 143 pages
Book Rating : 4.F/5 ( download)

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Book Synopsis Geomechanical Studies of the Barnett Shale, Texas, USA by : John Peter Vermylen

Download or read book Geomechanical Studies of the Barnett Shale, Texas, USA written by John Peter Vermylen and published by Stanford University. This book was released on 2011 with total page 143 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis presents five studies of a gas shale reservoir using diverse methodologies to investigate geomechanical and transport properties that are important across the full reservoir lifecycle. Using the Barnett shale as a case study, we investigated adsorption, permeability, geomechanics, microseismicity, and stress evolution in two different study areas. The main goals of this thesis can be divided into two parts: first, to investigate how flow properties evolve with changes in stress and gas species, and second, to understand how the interactions between stress, fractures, and microseismicity control the creation of a permeable reservoir volume during hydraulic fracturing. In Chapter 2, we present results from adsorption and permeability experiments conducted on Barnett shale rock samples. We found Langmuir-type adsorption of CH4 and N2 at magnitudes consistent with previous studies of the Barnett shale. Three of our samples demonstrated BET-type adsorption of CO2, in contrast to all previous studies on CO2 adsorption in gas shales, which found Langmuir-adsorption. At low pressures (600 psi), we found preferential adsorption of CO2 over CH4 ranging from 3.6x to 5.5x. While our measurements were conducted at low pressures (up to 1500 psi), when our model fits are extrapolated to reservoir pressures they reach similar adsorption magnitudes as have been found in previous studies. At these high reservoir pressures, the very large preferential adsorption of CO2 over CH4 (up to 5-10x) suggests a significant potential for CO2 storage in gas shales like the Barnett if practical problems of injectivity and matrix transport can be overcome. We successfully measured permeability versus effective stress on two intact Barnett shale samples. We measured permeability effective stress coefficients less than 1 on both samples, invalidating our hypothesis that there might be throughgoing flow paths within the soft, porous organic kerogen that would lead the permeability effective stress coefficient to be greater than 1. The results suggest that microcracks are likely the dominant flow paths at these scales. In Chapter 3, we present integrated geological, geophysical, and geomechanical data in order to characterize the rock properties in our Barnett shale study area and to model the stress state in the reservoir before hydraulic fracturing occurred. Five parallel, horizontal wells were drilled in the study area and then fractured using three different techniques. We used the well logs from a vertical pilot well and a horizontal well to constrain the stress state in the reservoir. While there was some variation along the length of the well, we were able to determine a best fit stress state of Pp = 0.48 psi/ft, Sv = 1.1 psi/ft, SHmax = 0.73 psi/ft, and Shmin = 0.68 psi/ft. Applying this stress state to the mapped natural fractures indicates that there is significant potential for induced shear slip on natural fracture planes in this region of the Barnett, particularly close to the main hydraulic fracture where the pore pressure increase during hydraulic fracturing is likely to be very high. In Chapter 4, we present new techniques to quantify the robustness of hydraulic fracturing in gas shale reservoirs. The case study we analyzed involves five parallel horizontal wells in the Barnett shale with 51 frac stages. To investigate the numbers, sizes, and types of microearthquakes initiated during each frac stage, we created Gutenberg-Richter-type magnitude distribution plots to see if the size of events follows the characteristic scaling relationship found in natural earthquakes. We found that slickwater fracturing does generate a log-linear distribution of microearthquakes, but that it creates proportionally more small events than natural earthquake sources. Finding considerable variability in the generation of microearthquakes, we used the magnitude analysis as a proxy for the "robustness" of the stimulation of a given stage. We found that the conventionally fractured well and the two alternately fractured wells ("zipperfracs") were more effective than the simultaneously fractured wells ("simulfracs") in generating microearthquakes. We also found that the later stages of fracturing a given well were more successful in generating microearthquakes than the early stages. In Chapter 5, we present estimates of stress evolution in our study reservoir through analysis of the instantaneous shut-in pressure (ISIP) at the end of each stage. The ISIP increased stage by stage for all wells, but the simulfrac wells showed the greatest increase and the zipperfrac wells the least. We modeled the stress increase in the reservoir with a simple sequence of 2-D cracks along the length of the well. When using a spacing of one crack per stage, the modeled stress increase was nearly identical to the measured stress increase in the zipperfrac wells. When using three cracks per stage, the modeled final stage stress magnitude matched the measured final stage stress magnitude from the simulfrac wells, but the rate of stress increase in the simulfrac wells was much more gradual than the model predicted. To further investigate the causes of these ISIP trends, we began numerical flow and stress analysis to more realistically model the processes in the reservoir. One of our hypotheses was that the shorter total time needed to complete all the stages of the simulfrac wells was the cause of the greater ISIP increase compared to the zipperfrac wells. The microseismic activity level measured in Chapter 4 also correlates with total length of injection, suggesting leak off into the reservoir encouraged shear failure. Numerical modeling using the coupled FEM and flow software GEOSIM was able to model some cumulative stress increase the reservoir, but the full trend was not replicated. Further work to model field observations of hydraulic fracturing will enhance our understanding of the impact that hydraulic fracturing and stress change have on fracture creation and permeability enhancement in gas shales.

Water-rock Interaction with Fracture Surfaces in a Unconventional Reservoir

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Publisher :
ISBN 13 : 9781392073452
Total Pages : 63 pages
Book Rating : 4.0/5 (734 download)

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Book Synopsis Water-rock Interaction with Fracture Surfaces in a Unconventional Reservoir by : Amber E. Zandanel

Download or read book Water-rock Interaction with Fracture Surfaces in a Unconventional Reservoir written by Amber E. Zandanel and published by . This book was released on 2017 with total page 63 pages. Available in PDF, EPUB and Kindle. Book excerpt: Hydraulic fracturing of unconventional reservoirs in the Powder River Basin in Wyoming and Montana is a growing source of oil and gas production. However, shale and tight-oil reservoirs in the region have high rates of decline in production compared to conventional oil and gas extraction, severely limiting well life. The full reasons for these high decline rates are unclear and have been attributed to a number of causes, including porosity decrease from fines migration. Recent field and experimental studies have shown that water-rock interaction with hydraulic fracturing fluid can cause mineral precipitation in the reservoir subsurface. Experimental studies into water-rock interaction also suggest that reservoirs are sensitive to changes in mineral surface area and to oil adhering to the mineral grains. This study tests the potential effect on water-rock interaction of removing residual oil from unconventional reservoir rock at reservoir conditions as found in the Powder River Basin in Wyoming. Rock samples from the Parkman Sandstone in the Powder River Basin, Wyoming were combined with synthesized formation water at in-situ reservoir conditions and reacted for ~35 days to approach steady-state. A simulated hydraulic fracturing fluid was then injected and reactions proceeded for another ~35 days. Fluid samples were collected throughout the experiment. One experiments uses rocks chemically processed to remove residual oil (low-residual oil, or LRO) and one uses rocks that retain residual oil (high-residual oil, or HRO). All experiments use 0.5–1 cm rock cubes to emulate the interface between fractures and the rock matrix. Analyzed chemistry results from aqueous samples collected during the experiments indicate water-rock interaction with both carbonates and clay minerals. Observation of rock recovered from the experiments shows changes to mineralogy visible in microscope or SEM. Fluid results suggest that unconventional reservoir rock with less residual oil at the mineral face is more prone to carbonate dissolution than reservoir rock with residual oil at the fracture face. Little evidence of precipitation or dissolution was observed on the recovered rock after experiments; however, water-rock interaction at the timescales of these experiments is not likely to cause significant changes to in-situ reservoir porosity or permeability. The water-silicate interaction trend suggests that the fluid chemistry may favor smectite or other clay precipitation at timescales beyond those represented in the experiments.

Regulating Water Security in Unconventional Oil and Gas

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Author :
Publisher : Springer Nature
ISBN 13 : 3030183424
Total Pages : 418 pages
Book Rating : 4.0/5 (31 download)

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Book Synopsis Regulating Water Security in Unconventional Oil and Gas by : Regina M. Buono

Download or read book Regulating Water Security in Unconventional Oil and Gas written by Regina M. Buono and published by Springer Nature. This book was released on 2019-10-31 with total page 418 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book addresses the need for deeper understanding of regulatory and policy regimes around the world in relation to the use of water for the production of ‘unconventional’ hydrocarbons, including shale gas, coal bed methane and tight oil, through hydraulic fracturing. Legal, policy, political and regulatory issues surrounding the use of water for hydraulic fracturing are present at every stage of operations. Operators and regulators must understand the legal, political and hydrological contexts of their surroundings, procure water for use in the fracturing and extraction processes, gain community cooperation or confront social resistance around water, collect flow back and produced water, and dispose of these wastewaters safely. By analysing and comparing different approaches to these issues from around the globe, this volume gleans insights into how policy, best practices and regulation may be developed to advance the interests of all stakeholders. While it is not always possible to easily transfer ‘good practice’ from one place to another, there is value in examining and understanding the components of different legal and regulatory regimes, as these may assist in the development of better regulatory law and policy for the rapidly growing unconventional energy sector. The book takes an interdisciplinary approach and includes chapters looking at water-energy nexus security in general, along with issue-focused and geographically-focused case studies written by scholars from around the world. Chapter topics, organized in conjunction with the stage of the shale gas production process upon which they touch, include the implications of hydraulic fracturing for agriculture, municipalities, and other stakeholders competing for water supplies; public opinion regarding use of water for hydraulic fracturing; potential conflicts between hydraulic fracturing and water as a human right; prevention of induced seismic activity, and the disposal or recycling of produced water. Several chapters also discuss implications of unconventional energy production for indigenous communities, particularly as regards sustainable water management. This volume will be of interest to scholars and students of energy and water, regulators and policymakers and operators interested in ensuring that they align with emergent best global practice.

Fracture and In-situ Stress Characterization of Hydrocarbon Reservoirs

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Author :
Publisher : Geological Society of London
ISBN 13 : 9781862391307
Total Pages : 230 pages
Book Rating : 4.3/5 (913 download)

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Book Synopsis Fracture and In-situ Stress Characterization of Hydrocarbon Reservoirs by : Geological Society of London

Download or read book Fracture and In-situ Stress Characterization of Hydrocarbon Reservoirs written by Geological Society of London and published by Geological Society of London. This book was released on 2003 with total page 230 pages. Available in PDF, EPUB and Kindle. Book excerpt: