... geology experiment geological subdiscipline sensor ae event solid earth granite seismic efficiency microseismicity ae sensor earthquake corner frequency viscosity injection fluid ABSTRACT In this study, Barre granite cubes were hydraulically fractured in laboratory, using different...

... perspective, sensitivity analyses reveal the influence of dip on CO 2 extraction and the need for optimal well placement. Elastic-brittle analysis suggests that reservoir fracturing and microseismicity may not occur during injection. However, microseismicity may occur during production, thus providing some...

...ARMA 22 0711 Dynamic Fracture Network Evolution: Monitoring and Characterizing using a Geomechanically Constrained Time-lapsed Windowed Microseismic Imaging Gentry, E.N. Petrolern LLC., Golden, CO, USA Soroush, H. and Batir, J. Petrolern, LLC., Atlanta, GA, USA Aminzadeh, F. FACT Inc., Houston, TX...

... in a higher stress zone, the fracture grew both upwards and downwards, whereas in the lower stress zones, fracture propagation was limited by higher stress layers. Although high and low stress layers show characteristic differences in microseismicity, we found no clear relationship between the distribution...

... ABSTRACT: Downhole microseismic monitoring provides the best means of detecting, mapping and characterizing the fracture systems developed during the creation and evolution of Enhanced Geothermal System (EGS) reservoirs. EGS development requires at least two wells, one for injection...

... ABSTRACT: This study analyzes 130,286 microseismic events recorded during treatment of 434 fracture stages in the Wolfcamp Shale Formation at the DOE Hydraulic Fracture Test Site (Reagan County, West Texas). Three principal results are presented: (1) Detailed LSM models of the shear-slip...

... was evaluated at a coal mine site for monitoring microseismicity induced by the longwall caving process. The sensor network was constructed using a single 3 km long fiber cable installed in a 250 m deep hole and buried in shallow trenches at the ground surface, around the longwall panel that was being mined...

... stimulation of pre-existing fractures. We demonstrate that the change in stratigraphic depth along the lateral portion of the Niobrara A well causes it to traverse regions of both high and low values of the least principal stress. As a result of this, the implications of microseismic data for hydraulic...

.... Downhole tiltmeter fracture mapping by passive monitoring of elasto-static microdeformation offers high sensitivity to fracture height. This work aims at presenting a workflow to integrate advanced microseismic analysis and tiltmeter fracture mapping to resolve dimensions of fracture with a non-uniform...

... ABSTRACT: In this paper, we integrate hydraulic fracture and geomechanical modelling with microseismic data to quantify deformation and stress field evolution as a predictive tool, as well as to provide a calibration and microseismic workflow. Our approach utilizes simulated fractures as well...

... ABSTRACT: Continuous microseismic monitoring was carried out around 9 producing longwall top coal caving (LTCC) panels with concurrently recorded daily face advance rates at Coal Mine Velenje in Slovenia over a 27-month monitoring period. The monitoring results suggested that spatial...

... ABSTRACT: By examining the collective behavior of microseismicity using Dynamic Parameter Analysis (DPA) the stress response associated with the hydraulic stimulation in the Midland Basin, Texas for stacked wells are examined to understand the critical role of stress and the potential...

... nature of the geology and geomechanical conditions of the play, well interference has been observed while pumping a vertical well. Microseismic events recorded during stimulation show a map-view “Z” pattern that has not been observed before and potentially identifies a trend of preexisting natural...

... ABSTRACT: Hydraulic fracturing induced microseismicity is often attributed to pore pressure changes alone thereby neglecting the role of elastic stress perturbations due to fracture opening. Here we show how fracture opening affects the in situ elastic stresses and the pore pressure diffusion...

... ABSTRACT: Mining-induced microseismicity has been extensively used to evaluate the potential for rock bursts and coal and gas outbursts in underground coal mines. In a research project completed a few years ago, it was observed that characteristics of microseismicity around a longwall working...

... in natural fracture properties. We develop a new Geomechanics-Based Stochastic Analysis of Microseismicity (GBSAM) to provide quantitative estimate of fractures orientations. In this work, the rock response to pore pressure is modeled using a line injection source to simulate water injection into a natural...

... Oil & Gas fault orientation hydraulic plane slippage event magnitude plane hydraulic fracturing Injection point microseismic event shear displacement temporal evolution multistage fracturing Simulation hydraulic fracture base case fault plane seismicity injection Magnitude...

... Abstract: Microseismic events are commonly recorded during hydraulic fracturing experiments. In microseismic interpretations, each event is often regarded as causally independent and uncorrelated to neighboring ones. In reality, both the rock deformation (static stresses) and transient wave...

... Abstract: The paper presents a tutorial of the impact that various geomechanical properties and injection characteristics have on the fracture geometry and corresponding microseismicity. The systematic sensitivity study also points to a workflow for using field microseismicity to calibrate...

... Abstract: The analysis of induced microseismicity is one of few tools available for characterizing the effectiveness of hydraulic stimulation in an enhanced geothermal system (EGS). However, the way in which the size, location, and source mechanisms of these events relate to the stimulation...