Download or read book Field Scale Permeability Estimation Based on Microseismic Monitoring written by Xin Zhang and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The 3-dimension diffusion equation which describes fluid flow during hydraulic fracturing is interpreted in a statistical way. For all diffusing particles in a pumping procedure, the root-mean-square average of diffusing distance, which evaluates the fluctuation of diffusing particles as time evolves, is proportional to the square root of the product of diffusivity and elapsed time. The diffusivity is obtained from the spatial-temporal distribution of located microseismic events as a function of the distance between these events and pumping points, as well as elapsed time from injection inception. The upper-limit diffusivity of the original formation is characterized by the curve which fits the outermost located events on a distance-time plot. Similarly, diffusivity of the formation after hydraulic fracturing is obtained by curve fitting innermost located events induced by fluid flow back after injection stops. The theoretical expression between the diffusivity tensor and permeability tensor is obtained based on an isothermal condition and assumed incompressible slurry. The diffusivity tensor is found to be equal to the permeability tensor divided by a scalar which is the product of dynamic viscosity, connected formation porosity, and formation compressibility. Application of these equations to microseismic data acquired in the Barnett Shale Formation yields, with assumed hydraulic fracture geometry, initial permeability of 0.16 to 3.21 milliDarcy in the assumed dominant direction of fracturing and normal to it, with an increase to 12.1 milliDarcy along the dominant direction of fracturing after hydraulic fracturing. Numerical simulation results of fluid flow in synthetic media demonstrate: (1) If the flow domain size is not much larger than the part influenced by the entrance effect, the variables in Darcy’s law are inter-dependent. If so, the obtained permeability, no matter by experiment or simulation, cannot be upscaled, even under homogeneous condition. (2) The volume or area influenced by the entrance effect inside the flow domain depends on the geometry of the flow domain, fluid properties, and in-situ parameters. The more viscous fluid flow in a lower rate, the smaller volume or area influenced by entrance effect. (3) The flow field is difficult to be fully developed in a periodic domain. The wide throat zones store fluid as reservoirs.
Download or read book Scale Dependence of Soil Permeability to Air written by and published by . This book was released on 1995 with total page 51 pages. Available in PDF, EPUB and Kindle. Book excerpt: This work investigates the dependence soil air-permeability on sampling scale in near-surface unsaturated soils. A new dual-probe dynamic pressure technique was developed to measure permeability in situ over different length scales and different spatial orientations in the soil. Soils at three sites were studied using the new technique. Each soil was found to have higher horizontal than vertical permeability. Significant scale dependence of permeability was also observed at each site. Permeability increased by a factor of 20 as sampling scale increased from 0.1 to 2 m in a sand soil vegetated with dry grass, and by a factor of 15 as sampling scale increased from 0.1 to 3.5 m in a sandy loam with mature Coast Live Oak trees (Quercus agrifolia). The results indicate that standard methods of permeability assessment can grossly underestimate advective transport of gas-phase contaminants through soils.
Download or read book Permeability Distribution Estimation Based on Semi Analytical Reservoir Simulator written by Shuai Chen and published by . This book was released on 2015 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Estimation of rock permeability distribution can be realized by automatic history matching production data. The process of automatic history matching involves the minimization of an objective function which usually includes the sum of data mismatch part as well as the sum of prior model mismatch part. For our semi-analytical simulator, the choice of optimization algorithms to minimize the objective function becomes of vital importance. For our simulator, we considered both gradient based methods and non-gradient based methods. Gradient based algorithms have the big advantage of much faster convergence rate over non-gradient based algorithms. It is illustrated in this study that application of gradient based methods is not practical for this simulator. Among the non-gradient based methods, we choose particle swarm optimization. For this algorithm, reservoir simulator can be treated as a black box. It is easy to implement and be transferred to another simulator within just a few hours. However, for gradient based algorithms, a set of completely different gradient equations are required, whereas greatest advantage of particle swarm optimization is its fast convergence rate at the beginning stage. Three examples are presented to show application of particle swarm optimization in automatic history matching based on synthetic production data. The first example simulates a high permeability channel existing in a relatively lower permeability formation. The second example simulates a formation with gradual changing permeability distribution. The third example represents a formation with sweet spot. The permeability of central part is higher compared to neighbouring area. Estimated permeability distributions have shown that the general permeability trends of these three examples can be caught. At the same time, predictions using estimated permeability field have a very good match with synthetic production history. As such, particle swarm optimization has been introduced and successfully applied to do automatic history matching in our semi-analytical simulator. Uncertainties associated with permeability distribution estimations are reduced significantly.
Download or read book Microseismicity written by S. A. Shapiro and published by . This book was released on 2008 with total page 67 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Petroleum Abstracts written by and published by . This book was released on 1998 with total page 472 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Renaissance Balusters and the Antique written by Paul Davies and published by . This book was released on 1983 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Geological Disasters in Deep Engineering Mechanism Warning and Risk Mitigation Volume II written by Guang-Liang Feng and published by Frontiers Media SA. This book was released on 2023-10-26 with total page 143 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Unconventional Petroleum Geology written by Caineng Zou and published by Elsevier. This book was released on 2017-03-10 with total page 508 pages. Available in PDF, EPUB and Kindle. Book excerpt: Unconventional Petroleum Geology, Second Edition presents the latest research results of global conventional and unconventional petroleum exploration and production. The first part covers the basics of unconventional petroleum geology, its introduction, concept of unconventional petroleum geology, unconventional oil and gas reservoirs, and the origin and distribution of unconventional oil and gas. The second part is focused on unconventional petroleum development technologies, including a series of technologies on resource assessment, lab analysis, geophysical interpretation, and drilling and completion. The third and final section features case studies of unconventional hydrocarbon resources, including tight oil and gas, shale oil and gas, coal bed methane, heavy oil, gas hydrates, and oil and gas in volcanic and metamorphic rocks. - Provides an up-to-date, systematic, and comprehensive overview of all unconventional hydrocarbons - Reorganizes and updates more than half of the first edition content, including four new chapters - Includes a glossary on unconventional petroleum types, including tight-sandstone oil and gas, coal-bed gas, shale gas, oil and gas in fissure-cave-type carbonate rocks, in volcanic reservoirs, and in metamorphic rocks, heavy crude oil and natural bitumen, and gas hydrates - Presents new theories, new methods, new technologies, and new management methods, helping to meet the demands of technology development and production requirements in unconventional plays
Download or read book Advances in Multi scale Multi physics Geophysical Modelling and Fluid Transport in Unconventional Oil and Gas Reservoir written by Wenhui Song and published by Frontiers Media SA. This book was released on 2022-08-12 with total page 155 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Characterization Modeling Monitoring and Remediation of Fractured Rock written by National Academies of Sciences, Engineering, and Medicine and published by National Academies Press. This book was released on 2021-01-29 with total page 177 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fractured rock is the host or foundation for innumerable engineered structures related to energy, water, waste, and transportation. Characterizing, modeling, and monitoring fractured rock sites is critical to the functioning of those infrastructure, as well as to optimizing resource recovery and contaminant management. Characterization, Modeling, Monitoring, and Remediation of Fractured Rock examines the state of practice and state of art in the characterization of fractured rock and the chemical and biological processes related to subsurface contaminant fate and transport. This report examines new developments, knowledge, and approaches to engineering at fractured rock sites since the publication of the 1996 National Research Council report Rock Fractures and Fluid Flow: Contemporary Understanding and Fluid Flow. Fundamental understanding of the physical nature of fractured rock has changed little since 1996, but many new characterization tools have been developed, and there is now greater appreciation for the importance of chemical and biological processes that can occur in the fractured rock environment. The findings of Characterization, Modeling, Monitoring, and Remediation of Fractured Rock can be applied to all types of engineered infrastructure, but especially to engineered repositories for buried or stored waste and to fractured rock sites that have been contaminated as a result of past disposal or other practices. The recommendations of this report are intended to help the practitioner, researcher, and decision maker take a more interdisciplinary approach to engineering in the fractured rock environment. This report describes how existing tools-some only recently developed-can be used to increase the accuracy and reliability of engineering design and management given the interacting forces of nature. With an interdisciplinary approach, it is possible to conceptualize and model the fractured rock environment with acceptable levels of uncertainty and reliability, and to design systems that maximize remediation and long-term performance. Better scientific understanding could inform regulations, policies, and implementation guidelines related to infrastructure development and operations. The recommendations for research and applications to enhance practice of this book make it a valuable resource for students and practitioners in this field.
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:
Download or read book Advances and Applications of Distributed Optical Fiber Sensing DOFS in Multi scales Geoscience Problems written by Yibo Wang and published by Frontiers Media SA. This book was released on 2023-02-07 with total page 164 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Microseismic Monitoring written by Vladimir Grechka and published by SEG Books. This book was released on 2017-09-01 with total page 471 pages. Available in PDF, EPUB and Kindle. Book excerpt: Over the past decade, microseismic monitoring, a technology developed for evaluating completions of wells drilled to produce hydrocarbons from unconventional reservoirs, has grown increasingly popular among oil and gas companies. Microseismic Monitoring, by Vladimir Grechka and Werner M. Heigl, discusses how to process microseismic data, what can and cannot be inferred from such data, and to what level of certainty this might be possible. The narrative of the book follows the passage of seismic waves: from a source triggered by hydraulic fracture stimulation, through hydrocarbon-bearing formations, towards motion sensors. The waves’ characteristics encode the location of their source and its focal mechanism. The analysis of various approaches to harvesting the source-related information from microseismic records has singled out the accuracy of the velocity model, fully accounting for the strong elastic anisotropy of hydraulically fractured shales, as the most critical ingredient for obtaining precise source locations and interpretable moment tensors. The ray theory complemented by its modern extensions, paraxial and Fréchet ray tracing, provides the only practical means available today for building such models. The book is written for geophysicists interested in learning and applying advanced microseismic data-processing techniques.
Download or read book Geophysics and Geosequestration written by Thomas L. Davis and published by Cambridge University Press. This book was released on 2019-05-09 with total page 391 pages. Available in PDF, EPUB and Kindle. Book excerpt: An overview of the geophysical techniques and analysis methods for monitoring subsurface carbon dioxide storage for researchers and industry practitioners.
Download or read book Harmonising Rock Engineering and the Environment written by Qihu Qian and published by CRC Press. This book was released on 2011-09-14 with total page 2048 pages. Available in PDF, EPUB and Kindle. Book excerpt: Harmonising Rock Mechanics and the Environment comprises the proceedings (invited and contributed papers) of the 12th ISRM International Congress on Rock Mechanics (Beijing, China, 18-21 October 2011). The contributions cover the entire scope of rock mechanics and rock engineering, with an emphasis on the critical role of both disciplines in sustai
Download or read book Unconventional Reservoir Geomechanics written by Mark D. Zoback and published by Cambridge University Press. This book was released on 2019-05-16 with total page 495 pages. Available in PDF, EPUB and Kindle. Book excerpt: A comprehensive overview of the key geologic, geomechanical and engineering principles that govern the development of unconventional oil and gas reservoirs. Covering hydrocarbon-bearing formations, horizontal drilling, reservoir seismology and environmental impacts, this is an invaluable resource for geologists, geophysicists and reservoir engineers.
Download or read book Microseismicity a tool for reservoir characterization written by S. A. Shapiro and published by . This book was released on 2008 with total page 67 pages. Available in PDF, EPUB and Kindle. Book excerpt:
