...) simulations. Unfortunately, meso-scale structures fall below seismic survey resolution and imaging and characterizing of these structures is challenging. Induced seismic events image meso-scale structures and provide useful information on their spatial distribution and architecture. This study investigates...

... reservoir characterization complex reservoir seismicity review seismic event swd application us government estimate disposal plume true producing formation application upstream oil & gas urtec hazard geologic target texas operator true stratigraphic horizon water management...

... production, and low-pressure injection. We identified 59 low frequency seismic events in this twoweek time period that have a dominant concentration of energy in 1-5 Hz frequency range and last for up to 30 seconds. These events were uniquely recorded by our seismic network and are significantly different...

... Abstract Low-frequency seismic events of long duration were recorded by a surface array of 48, 3-component geophones during the fracture stimulation of two offset horizontal wells in the Middle Wolfcamp Formation (8000–8100 ft. below the geophone array) at the Hydraulic Fracturing Test Site...

... to selected seismic events with high signal-to-noise ratio from the Delaware Basin to estimate effective quality factors representing the basin sediments. The observed attenuation can be characterized by attenuation factors ( Q ) of ranging between 90 and 100 (with uncertainty of 30) for P-wave and S-waves...

... Introduction Recent media coverage has highlighted a major shortcoming in the industry of unconventional resource production, inducement of seismic events. Seismicity in certain areas of the midcontinent North America has increased drastically in the past few years. This has come...

... seismic event Earthquake shear stress probability reliability risk assessment operation waste water geological formation URTeC seismicity injection URTeC: 2460380 Leading Safety Performance Indicator Framework for Deep Well Injection of Waste Water Hamed Hamedifar*, Ph.D., M.ASCE, Senior...

... strength, expressed as a critical pressure value, then every seismic event is effectively a pressure measurement, with a probability density function given by this criticality. We use a standard history-matching approach to invert for permeability, using an adjoint method to compute gradient information...

... seismic events over a broad range of magnitudes from the smallest detectable events with magnitudes below zero (microseismic) to larger events with magnitudes above zero (induced seismic), typically related to larger pre-existing fractures or faults. Stimulating these larger structures could lead to loss...