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Hydraulically Induced Microseismic Fracture Characterization From Surface Seismic Attributes And Seismic Inversion
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Book Synopsis Hydraulically-induced Microseismic Fracture Characterization from Surface Seismic Attributes and Seismic Inversion by : Xavier E. Refunjol Chirinos
Download or read book Hydraulically-induced Microseismic Fracture Characterization from Surface Seismic Attributes and Seismic Inversion written by Xavier E. Refunjol Chirinos and published by . This book was released on 2010 with total page 134 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Understanding Downhole Microseismic Data Analysis by : Jubran Akram
Download or read book Understanding Downhole Microseismic Data Analysis written by Jubran Akram and published by Springer Nature. This book was released on 2020-01-01 with total page 196 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is designed as an excellent resource text for students and professionals, providing an in-depth overview of the theory and applications of downhole microseismic monitoring of hydraulic fracturing. The readers will benefit greatly from the detailed explanation on the processes and workflows involved in the acquisition design modeling, processing and interpretation of microseismic data.
Book Synopsis Microseismic Imaging of Hydraulic Fracturing by : Shawn Mawell
Download or read book Microseismic Imaging of Hydraulic Fracturing written by Shawn Mawell and published by SEG Books. This book was released on 2014-01-01 with total page 212 pages. Available in PDF, EPUB and Kindle. Book excerpt: Microseismic Imaging of Hydraulic Fracturing: Improved Engineering of Unconventional Shale Reservoirs (SEG Distinguished Instructor Series No. 17) covers the use of microseismic data to enhance engineering design of hydraulic fracturing and well completion. The book, which accompanies the 2014 SEG Distinguished Instructor Short Course, describes the design, acquisition, processing, and interpretation of an effective microseismic project. The text includes a tutorial of the basics of hydraulic fracturing, including the geologic and geomechanical factors that control fracture growth. In addition to practical issues associated with collecting and interpreting microseismic data, potential pitfalls and quality-control steps are discussed. Actual case studies are used to demonstrate engineering benefits and improved production through the use of microseismic monitoring. Providing a practical user guide for survey design, quality control, interpretation, and application of microseismic hydraulic fracture monitoring, this book will be of interest to geoscientists and engineers involved in development of unconventional reservoirs.
Book Synopsis Study of Induced Seismicity for Reservoir Characterization by : Junlun Li (Ph. D.)
Download or read book Study of Induced Seismicity for Reservoir Characterization written by Junlun Li (Ph. D.) and published by . This book was released on 2013 with total page 258 pages. Available in PDF, EPUB and Kindle. Book excerpt: The main goal of the thesis is to characterize the attributes of conventional and unconventional reservoirs through passive seismicity. The dissertation is comprised of the development and applications of three new methods, each of which focuses on a different aspect of fractures/faults and the resulting seismicity. In general, the thesis work discusses reservoir characterization from two aspects: 1) understanding fractures and faults in reservoirs as seismic sources with induced seismicity, and then inferring other properties of the reservoirs, such as stress regime and velocity structure (Chapters 2, 3, 4); 2) understanding the fractures in reservoirs as seismic scatterers (Chapter 5). First, I introduce a new method to determine the source mechanisms of the induced earthquakes by incorporating high frequency waveform matching, first P-arrival polarities and average S/P amplitude ratios. The method is applied to 40 induced earthquakes from an oil/gas field in Oman monitored by a sparse near-surface seismic network and a deep borehole seismic network. The majority of the events have a strike direction parallel with the major NE-SW faults in the region, and some events trend parallel with the NW-SE conjugate faults. The results are consistent with the in-situ well breakout measurements and the current knowledge of the stress direction of this region. The source mechanisms of the studied events together with the hypocenter distribution indicate that the microearthquakes are caused by the reactivation of preexisting faults. Then I introduce a new method to locate microseismic events induced by hydraulic fracturing with simultaneous anisotropic velocity inversion using differential arrival times and differential back azimuths. We derive analytical sensitivities for the elastic moduli (Cij) and layer thickness L for the anisotropic velocity inversion. The method is then applied to a microseismic dataset monitoring a Middle Bakken completion in the Beaver Lodge area of North Dakota. Our results show: 1) moderate-to-strong anisotropy exists in all studied sedimentary layers, especially in both the Upper Bakken and Lower Bakken shale formations, where the Thomsen parameters (E and y) can be over 40%; 2) all events selected for high signal-to-noise ratio and used for the joint velocity inversion are located in the Bakken and overlying Lodgepole formations, i.e., no strong events are located in the Three Forks formation below the Bakken; 3) more than half of the strong events are in two clusters at about 100 and 150 meters above the Middle Bakken. Re-occurrence of strong, closely clustered events suggests activation of natural fractures or faults in the Lodgepole formation. Finally, I introduce a new hybrid method to model the shear (SH) wave scattering from arbitrarily shaped fractures embedded in a heterogeneous medium by coupling the boundary element method (BEM) and the finite difference method (FDM) in the frequency domain. The hybrid method can calculate scattering from arbitrarily shaped fractures very rapidly, thus Monte Carlo simulations for characterizing the statistics of fracture attributes can be performed efficiently. The advantages of the hybrid method are demonstrated by modeling waves scattered from tilted fractures embedded in complex media. Interesting behaviors of the scattered waves, such as frequency shift with the scattering order and coherent pattern of scattered waves through strong heterogeneities, are observed. This method can be used to analyze and interpret the scattered coda waves in the microseismic observations, e.g., the reverberating multiples in the Bakken microseismic data which cannot be explained by the determined layered anisotropic velocity model alone.
Book Synopsis Seismic Forward Modeling of Fractures and Fractured Medium Inversion by : Xiaoqin Cui
Download or read book Seismic Forward Modeling of Fractures and Fractured Medium Inversion written by Xiaoqin Cui and published by Springer. This book was released on 2017-06-09 with total page 170 pages. Available in PDF, EPUB and Kindle. Book excerpt: This detailed book systematically investigates subsurface geological fractures using rock mechanics, geology, and geophysics. Based on geological fracture mechanisms and fracture boundary conditions, it presents new finite-difference equations for the simulation of seismic wave responses to geological fractures, and proposes innovative AVO inversion equations for the accurate estimation of the rock properties of the fractured medium. It employs schematics, snapshots, color images and charts to demonstrate the mechanical characteristics of the fractures, the seismic wave-field response to the fractures, the seismic data attributes of the fractures and the rock properties of the fractures obtained via inversion. It provides a new methodology for enhancing geological fracture detection technology and for the accurate delineation of fractured reservoirs that ultimately benefits reservoir and mining engineers, geologists and geophysicists in terms of optimizing reservoir recovery, well performance and mining safety.
Book Synopsis Seismic Attributes for Prospect Identification and Reservoir Characterization by : Satinder Chopra
Download or read book Seismic Attributes for Prospect Identification and Reservoir Characterization written by Satinder Chopra and published by SEG Books. This book was released on 2007 with total page 474 pages. Available in PDF, EPUB and Kindle. Book excerpt: Introducing the physical basis, mathematical implementation, and geologic expression of modern volumetric attributes including coherence, dip/azimuth, curvature, amplitude gradients, seismic textures, and spectral decomposition, the authors demonstrate the importance of effective colour display and sensitivity to seismic acquisition and processing.
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:
Book Synopsis Fluid-Induced Seismicity by : S. A. Shapiro
Download or read book Fluid-Induced Seismicity written by S. A. Shapiro and published by Cambridge University Press. This book was released on 2015-04-23 with total page 299 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides a quantitative introduction to the physics, application, interpretation, and hazard aspects of fluid-induced seismicity, focussing on spatio-temporal dynamics. Including many real data examples, this is a valuable reference for researchers and graduate students of geophysics, geomechanics and petrophysics, and a practical guide for petroleum geoscientists and engineers.
Book Synopsis Seismic Petrophysics in Quantitative Interpretation by : Lev Vernik
Download or read book Seismic Petrophysics in Quantitative Interpretation written by Lev Vernik and published by SEG Books. This book was released on 2016-10-15 with total page 227 pages. Available in PDF, EPUB and Kindle. Book excerpt: Exploration and characterization of conventional and unconventional reservoirs using seismic technologies are among the main activities of upstream technology groups and business units of oil and gas operators. However, these activities frequently encounter difficulties in quantitative seismic interpretation due to remaining confusion and new challenges in the fast developing field of seismic petrophysics. Seismic Petrophysics in Quantitative Interpretation shows how seismic interpretation can be made simple and robust by integration of the rock physics principles with seismic and petrophysical attributes bearing on the properties of both conventional (thickness, net/gross, lithology, porosity, permeability, and saturation) and unconventional (thickness, lithology, organic richness, thermal maturity) reservoirs. Practical solutions to existing interpretation problems in rock physics-based amplitude versus offset (AVO) analysis and inversion are addressed in the book to streamline the workflows in subsurface characterization. Although the book is aimed at oil and gas industry professionals and academics concerned with utilization of seismic data in petroleum exploration and production, it could also prove helpful for geotechnical and completion engineers and drillers seeking to better understand how seismic and sonic data can be more thoroughly utilized.
Book Synopsis Using Seismic Tomography to Characterize Fracture Systems Induced by Hydraulic Fracturing by :
Download or read book Using Seismic Tomography to Characterize Fracture Systems Induced by Hydraulic Fracturing written by and published by . This book was released on 1995 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt: Microearthquakes induced by hydraulic fracturing have been studied by many investigators to characterize fracture systems created by the fracturing process and to better understand the locations of energy resources in the earth's subsurface. The pattern of the locations often contains a great deal of information about the fracture system stimulated during the hydraulic fracturing. Seismic tomography has found applications in many areas for characterizing the subsurface of the earth. It is well known that fractures in rock influence both the P and S velocities of the rock. The influence of the fractures is a function of the geometry of the fractures, the apertures and number of fractures, and the presence of fluids in the fractures. In addition, the temporal evolution of the created fracture system can be inferred from the temporal changes in seismic velocity and the pattern of microearthquake locations. Seismic tomography has been used to infer the spatial location of a fracture system in a reservoir that was created by hydraulic fracturing.
Book Synopsis Study of Microseismic Events by : Yunhui Tan
Download or read book Study of Microseismic Events written by Yunhui Tan and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Microseismic is commonly used to monitor the hydraulic fracturing process. Seismic signals are recorded using either surface or downhole geophones to invert for hypocenters of rock movements (moment magnitude usually between -3 and 0) happened during hydraulic fracturing. The location of these microseismic events are used to estimate the stimulated reservoir volume. This thesis focuses on further understanding of microseismic events beyond the cloud of locations. To test whether the lineament of microseismic event cloud represent fluid filled open fractures, we looked at the change of S wave from perforations when it passes microseismic event cloud (Chapter 2). Strong attenuation of S wave suggests that the microseismic event cloud indicates fluid-filled open fractures.We also studied the evolution of medium velocity structure during hydraulic fracturing. By inverting the arrival time of perforation shots recorded by downhole geophones, we found that the velocity of stimulated region is higher than the unstimulated region (Chapter 3).A new model (Rutledge-Eisner model) is introduced to describe the mechanism of microseismic event generation. This model states that the microseismic events are a results of shearing on bedding planes caused by opening of hydraulic fractures. Moment tensor inversion results from surface microseismic monitoring of the Marcellus shale is presented to validate this model (Chapter 4).Based on this model, we explained some phenomena in the temporal and spatial distribution of microseismic events under different geological and geomechanical conditions (Chapter 5). We found that microseismic events concentrate behind the fracture tip in a single planar fracture propagation. Low in-situ stress environment leads to early microseismic events while high in-situ stress lead to late microseismic events during fracturing. Natural fracture networks show unique microseismic temporal patterns with the increased sand concentration. Higher in-situ stress variation between layers lead to more microseismic events and larger magnitude.In summary, microseismic monitoring is an effective method to reveal details about hydraulic fracturing.
Book Synopsis Unconventional Reservoir Geomechanics by : Mark D. Zoback
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.
Book Synopsis Characterizing Hydraulically Fractured Reservoirs Using Induced Microearthquakes by :
Download or read book Characterizing Hydraulically Fractured Reservoirs Using Induced Microearthquakes written by and published by . This book was released on 1991 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt: Hydraulic fracturing is a common method employed to increase the production of oil and gas fields. Recently, there has been increased interest in monitoring the microearthquakes induced by hydraulic fracturing as a means of obtaining data to characterize reservoir changeS induced by the injection. Two types of microearthquakes have been observed during hydraulic fracturing. Tensile events have been observed and modeled as the parting of the surfaces of a fracture. A majority of the events observed have been shear-slip events, where two sides of a fault plane slip parallel to each other but in opposite directions. The locations of the microearthquakes can be analyzed to determine regions where significant seismic energy was released, which presumably are regions where injected fluid penetrated into the rock along pre-existing fractures or zones of weakness. The spatial patterns in the locations can be analyzed to fine regions where events cluster along planes, which are interpreted to be the dominant fluid flow paths. Imaging methods can also be applied to the travel time and waveform data to obtain direct evidence for the locations of the fractures or fracture zones. 27 refs., 2 figs.
Book Synopsis Microseismic Mapping of Fluid Induced Hydraulic Fractures and Analysis of Location Uncertainties by : Camilo Moreno
Download or read book Microseismic Mapping of Fluid Induced Hydraulic Fractures and Analysis of Location Uncertainties written by Camilo Moreno and published by . This book was released on 2011 with total page 426 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Geophysics and Geosequestration by : Thomas L. Davis
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.
Book Synopsis Microseismic Imaging of Hydraulic Fracturing by : Shawn Maxwell
Download or read book Microseismic Imaging of Hydraulic Fracturing written by Shawn Maxwell and published by . This book was released on 2014 with total page 197 pages. Available in PDF, EPUB and Kindle. Book excerpt: This work aims to provide a practical user guide for survey design, quality control, interpretation, and application of microseismic hydraulic fracture monitoring. The book is intended to provide a comprehensive educational resource for microseismic hydraulic fracture imaging, with a focus on practical tips for executing a successful microseismic project. Limitations of the data and potential pitfalls are emphasised throughout.
