On the nature of reservoirinduced seismicity springerlink. Fluid induced seismicity is a valuable reference for researchers and graduate students working in the fields of geophysics, geology, geomechanics and petrophysics, and a practical guide for petroleum geoscientists and engineers working in the energy industry. Home stanford center for induced and triggered seismicity. The dissertation work is comprised of four major studies, each focusing on a different aspect of induced seismicity. A detailed understanding of the physical processes associated with reservoir induced seismicity is required for assessing and eventually mitigating the seismic risk. Analysis of induced seismicity in geothermal reservoirs an. Recommend annotated references on induced seismicity, with a link to the refereed journal. To obtain the synthetic catalogue, a description of the unperturbed state of the geothermal reservoir and its.
Integration of induced seismicity and geomechanics for better. The stanford center for induced and triggered seismicity is an industrial affiliates program on the topic of induced and triggered earthquakes. Based on analysis of 55 reported cases of reservoirinduced seismicity worldwide and geologic and seismologic data for 16 selected dams and reservoirs in the sierran foothills, wcc 1977 reached two sets of conclusions about reservoirinduced seismicity. Though understanding of reservoir induced seismic activity is very limited, it has been noted that seismicity appears to occur on dams with heights larger than 330 feet 100 m. This may be in the form of realtime monitoring of any ongoing induced seismicity. In general, induced seismicity refers to seismic events that are a result of human activity. Induced seismic activity attributed to a range of human activities has been documented since at least the 1920s. Shale gas, tight oil, and induced seismicity zoback, mark d. In this overview we report results of analysing induced seismicity in geothermal reservoirs in various tectonic settings within the framework of the european geothermal engineering integrating mitigation of induced seismicity in reservoirs geiser project. A rapid rise in rate, and a rapid rise in research a rapid increase in the rate of induced seismicity since 2008, including numerous felt earthquakes and several moderatesized earthquakes figures 2 and 3, abruptly raised the impact and public visibility of anthropogenic seismicity. The surge of earthquakes in central oklahoma has features of. Reservoir induced earthquakes, volume 64 1st edition.
Jul 31, 2018 furthermore, we demonstrate that underground reservoirinduced seismicity occurs preferably in normal faulting and strikeslip settings, the latter being prevalent in oklahoma. This study also applied a material forecast model for the estimation of timetofailure or peak seismicity in reservoirinduced seismicity, which may provide some general guidelines for shortterm field case estimations. Fluidinduced seismicity is a valuable reference for researchers and graduate students working in the fields of geophysics, geology, geomechanics and petrophysics, and a practical guide for petroleum geoscientists and engineers working in the energy industry. The location of the seismicity is governed by the nature of faulting below and near the reservoir. Free pdf computer ebook download unconventional reservoir. The occurrence of induced seismic events during hydraulic fracturing of reservoirs to enhance permeability is an unavoidable process. Click download or read online button to get induced seismicity book now. Since the beginning of the us shale gas revolution i. Koyna reservoir in india exemplifies induced seismicity in a wrenchfault environment. Reservoirinduced seismic events can be relatively large compared to other forms of induced seismicity. Due to the increased public concern with respect to the risks imposed by induced seismicity, however, the development of a soft stimulation method is needed creating higher permeability with less induced seismicity.
The temporal distribution of seismicity and reservoirinduced stresses but differ between shows a migration outward from the center of the the. Among these, the reservoir induced seismicity ris occurs when the reservoirs have more water column of over 100. Wastewater reinjection into a saline aquifer shown in 1 and the injection of fracturing fluid principally water into the shale reservoir shown in 2 have the same impact in elevating fluid pressures and driving the stress state on a deeply penetrating fault. Though understanding of reservoirinduced seismic activity is very limited, it has been noted that seismicity appears to occur on dams with heights larger than 330 feet 100 m. Statistical investigation of reservoirinduced seismicity in. This site is like a library, use search box in the widget to get ebook that you want. Furthermore, we demonstrate that underground reservoirinduced seismicity occurs preferably in normal faulting and strikeslip settings, the latter being prevalent in oklahoma. There are now over 70 known cases of reservoirinduced earthquakes. In the reconnaissance phase of a field, the subsurface fault mapping, in situ stress and. Induced seismic activity attributed to a range of human activities has been documented since at.
Effective monitoring of reservoirinduced seismicity. The influence of these coseismic static stress changes during reservoir stimulation on induced seismicity is analysed in schoenball et al. Two mechanisms could be responsible for the induced seismicity. Whereas postreservoir seismicity was produced by decrease of effective stress, subsidence was responsive to increase of total stress. At some reservoirs, seismicity begins almost immediately following the first filling of the reservoir. Both reservoirs are located in the canadian shield. Mechanism of reservoir induced seismicity, koyna, monticello reservoir, lake mead. The seismicity is likely to be more widespread and deeper for a larger reservoir than for a smaller one.
Induced seismicity download ebook pdf, epub, tuebl, mobi. Fatigue hydraulic fracturing by cyclic reservoir treatment. Among these, the reservoirinduced seismicity ris occurs when the reservoirs have more water column of over 100. Induced seismicity potential in energy technologies identifies gaps in knowledge and research needed to advance the understanding of induced seismicity. In general, the thesis work discusses reservoir characterization from two aspects. Ten stanford professors in the departments of geophysics, energy resource engineering, earth system science and civil and environmental engineering are involved in scits see people. Suggestions on related aspects of induced seismicity to address in future revisions. A primer on technical and regulatory considerations informing risk management and mitigation. This study also applied a material forecast model for the estimation of timetofailure or peak seismicity in reservoir induced seismicity, which may provide some general guidelines for shortterm field case estimations. Following further impoundment to 2008, the seismicity has spread as far as 30 km from the reservoir.
The temporal distribution of induced seismicity following the filling of large reservoirs shows two types of response. A small fraction of the shear may be occurring as permanent aseismic creep, which is being converted to stick. Assessing induced seismicity risk at co2 storage projects. Lg3 reservoir is in the the superior province, manic 3 is in the grenville province. Mechanism of induced seismicity at the geysers geothermal. Ground water protection council and interstate oil and gas compact commission. Shale gas, tight oil, and induced seismicity english version 9781107087071 rtf fb2 by mark d. There are now over 70 known cases of reservoir induced earthquakes. The mechanism of induced seismicity download ebook pdf. Assessing induced seismicity risk at co 2 storage projects. Injection induced seismicity and insitu stress integrated analysis demonstrated the pore pressure migration behavior during the stimulation and after shutin. Seismicity in granitic terranes is mainly associated with pore pressure diffusion whereas in karst terranes the chemical effect of water appears to play a major role in triggering ris. The temporal distribution of seismicity and reservoir induced stresses but differ between shows a migration outward from the center of the the. Integration of induced seismicity data and other geophysical data is crucially important for better understanding on reservoir physics and further exploration of the reservoir.
Making the earth move reservoirinduced seismicity is a term related to humans starting earthquakes. Making the earth move reservoir induced seismicity is a term related to humans starting earthquakes. Continuous monitoring of the ris after the filling of the reservoirs permitted the recording of a number of seismic data. The induced seismicity is observed both beneath the deepest part of the reservoir and in the surrounding areas. There are many different ways in which human activity can cause induced seismicity including geothermal operations, reservoir impoundment water behind dams, waste water injections, and oil and gas operations such as hydraulic fracturing. Characteristics of small earthquakes and stress field. Based on analysis of 55 reported cases of reservoir induced seismicity worldwide and geologic and seismologic data for 16 selected dams and reservoirs in the sierran foothills, wcc 1977 reached two sets of conclusions about reservoir induced seismicity associated with auburn dam as proposed at that time. Statesfirst induced seismicity by injection work group iswg, 2015. The site is topographically uplifted and close to the western faultboundary of the indian peninsula.
Download the factsheet for more information on reservoirinduced seismicity, including key case studies of potential ris sites, quotes from leading seismologists, and a list of. Many state there is a difference between triggered and induced. In view of the characteristic features of ris in china, we can expect. Itoiz reservoir in centralwestern pyrenees, spain, a region of lowlevel ambient seismicity, was the location of a m 4. Reservoirinduced seismicity associated with the itoiz. A workshop on induced seismicity was organized during the 27th general assembly of the international association of seismology and physics of earths interior iaspei in wellington, new zealand durin. Reservoir induced seismicity ris was observed at lg3 and manic 3 reservoirs in quebec.
Integration of induced seismicity and geomechanics for. Observations in enhanced geothermal system egs reservoirs of induced seismicity and slow aseismic slip ruptures on related faults suggest a close link between the two phenomena. Several numerical models use the redistribution of stress after failure of a slip patch to propagate failure to neighbouring slip patches and, thus, obtain rupture areas and, finally. The result suggests that the seismicity in the area becomes active during a period when the water level is. Energy of injectioninduced seismicity predicted from insitu.
Findings, conclusions, research, and proposed actions. Induced is the significant change in load stress andor pore. This thesis presents methods of analysis and results from a petroleum reservoir monitoring application using induced seismicity data. Free pdf computer ebook download unconventional reservoir geomechanics. These damaging earthquakes have occurred in china, kariba, zambia, greece, kremasta, koyna, india, california and elsewhere. Reservoir induced seismic events can be relatively large compared to other forms of induced seismicity. At others, pronounced increases in seismicity are not observed until a number of seasonal filling cycles have passed. Reservoir induced seismicity just another dam argument. A vertical well taps a conventional oil reservoir whereas a horizontal well accesses a shale reservoir for gas. Over 3,400 earthquakes were registered in the reservoirs vicinity between 2003, when the dam began. Gsa members are encouraged to start a thread on gsas open forum, if desired. Since the publication of the first dams and earthquakes in 1976, the phenomenon of reservoir induced seismicity ris is more widely understood. Production optimization, permeability evolution and induced seismicity this study employs a coupled thermalhydrologicalmechanical model to investigate the permeability evolution and fault reactivation of a critically stressed fault in geothermal reservoir.
We present a hydromechanical model describing fluid injection induced seismicity. Together these two sets of data indicate that a long, narrow reservoir, aligned in the direction n 60w, exists. Department of earth sciences kfupm introduction to seismology reservoir induced seismicity reading assignment. Front matter induced seismicity potential in energy. Click download or read online button to get the mechanism of induced seismicity book now.
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