Petroleum reservoir characterization using downhole microseismic monitoring

Abstract

Imaging of microseismic data is the process by which we use information about the source locations, timing, and mechanisms of the induced seismic events to make inferences about the structure of a petroleum reservoir or the changes that accompany injections into or production from the reservoir. A few key projects were instrumental in the development of downhole microseismic imaging. Most recent microseismic projects involve imaging hydraulic-fracture stimulations, which has grown into a widespread fracture diagnostic technology. This growth in the application of the technology is attributed to the success of imaging the fracture complexity of the Barnett Shale in the Fort Worth basin, Texas, and the commercial value of the information obtained to improvecompletions and ultimately production in the field. The use of commercial imaging in the Barnett is traced back to earlier investigations to prove the technology with the Cotton Valley imaging project and earlier experiments at the M-Site in the Piceance basin, Colorado. Perhaps the earliest example of microseismic imaging using data from downhole recording was a hydraulic fracture monitored in 1974, also in the Piceance basin. However, early work is also documented where investigators focused on identifying microseismic trace characteristics without attempting to locate the microseismic sources. Applications of microseismic reservoir monitoring can be tracked from current steam-injection imaging, deformation associated with reservoir compaction in the Yibal field in Oman and the Ekofisk and Valhall fields in the North Sea, and production-induced activity in Kentucky, U.S.A.

Analysis of induced seismicity in geothermal reservoirs – An overview

“…Hydraulic fracturing has become a standard technology in geothermal stimulation (Bromley, 2010) and has been for decades in oil and gas applications (Maxwell et al, 2010). One of the challenges in EGS is to increase permeability in a way that the heat transfer is optimally efficient, which is a fundamental difference to the challenges in unconventional reservoirs (enhanced recovery).…”

Efficient global optimization of reservoir geomechanical parameters based on synthetic aperture radar-derived ground displacements

“…The state of the art in monitoring the stress/strain field at the reservoir depth has advanced, owing to new instrumentation and sensors such as the radioactive marker technique (Ferronato et al, 2003), time-lapse seismic methods (Alassi et al, 2010), and micro-seismic monitoring (Maxwell et al, 2010). Despite these technological advances, measurements of ground surface displacements, caused by stress rearrangements at depth, still represent the largest and most comprehensive data set available to characterize the geomechanical behavior of the system.…”

On Discrete Structure of Geologic Medium and Continual Approach to Modeling Its Movements

“…раствора, вязкость которого понижена на порядок по сравнению с обычной) [Turcotte et al, 2014]. Стимулированный объем охватывает об-ласть разветвленных трещин гидроразрыва и/или активизированных естественных трещин, его раз-витие регистрируется микросейсмическими собы-тиями [Maxwell et al, 2010] и теоретически модели-руется как на основе континуального [Norris et al, 2015a], так и дискретного [Norris et al, 2015b] под-хода.…”