... Source mechanisms help understand the fracturing behavior and the evolving stress field in microseismic monitoring. This study presents how to retrieve the source mechanisms of hydraulic-fracturing induced events using a source mechanism screening test based on the S/P amplitude ratio and a full...

... Using a physics-based shear-tensile crack model, we develop a Bayesian approach to simultaneously calculate source mechanisms for a set of microearthquakes and rigorously quantify the uncertainties of model parameters. To that end, we use the normalized displacement amplitudes of direct P-waves...

... learning convolutional neural network machine learning upstream oil & gas localization bin real-data earthquake localization exploration geophysicist 10 convolutional layer seg international exposition search space neural network mechanism convnet source mechanism synthetic data Real...

... Processing of combined microseismic data from two independent sparse seismic monitoring networks deployed at the (near-)surface around the Illinois Basin – Decatur Project (IBDP) injection site was done to characterize the detected seismicity by locations and inverted source mechanisms...

... mighani source mechanism magnitude seg international exposition interaction hydraulic fracturing co 2 exploration geophysicist 10 injection deformation seismic energy Monitoring Chemo-Mechanical Deformation through Acoustic Emission Experiments Saied Mighani*, Anthony C. Clark, and Tiziana...

... ABSTRACT I present two examples of microseismicity in the Midland basin where the source mechanism nodal planes indicate shearing is persistently aligned with the hydraulic fracture or, alternatively, orthogonal to the hydraulic fracture. I consider arguments for both possible solutions where...

... ABSTRACT DAS microseismicity observations show distinct amplitude patterns for P and S-wave arrivals. This amplitude characteristic is produced by the source mechanism’s radiation pattern and the distributed sensors’ receiver sensitivity function in addition to velocity model induced...

... hydraulic fracturing annual meeting seg international exposition upstream oil & gas annual international meeting case study traveltime computation seg 10 monitoring davis source mechanism microseismic data Andersen , E. , H. Davey , C. Steinhoff , and T. Davis...

... and rapid evaluation of surface array designs. Presentation Date: Monday, October 15, 2018 Start Time: 1:50:00 PM Location: 208A (Anaheim Convention Center) Presentation Type: Oral machine learning loss function reservoir characterization source mechanism upstream oil & gas tensor...

... Summary Estimating source parameters (e.g.,wavelet and source mechanisms) is an important aspect of both active- and passive-source elastic full waveform inversion. Waveform-based source-parameter estimation potentially leads deeper insights into the nature of earthquakes and active sources...

.... Source mechanisms show a predominantly strike-slip mechanism consistent with lineaments apparent from the seismic locations. The case study highlights observations during multiple fault activation with progressive fault activation and the corresponding ground motion, and provides seismic observations...

... of the direct P-wave. By classifying the best double-couple solutions of the retrieved moment tensors, three groups of distinct focal mechanisms were identified, of which two have predominantly double-couple source mechanisms. The moment tensors of group three exhibit significant non-double-couple components...

... numbers of sensors can, however, compensate and allow for a better location and characterization of the seismic activity. In this abstract, we present for the first time an application of two methods for a robust determination of source mechanisms for low-SNR microseismic events recorded by a PRM system...

... along the fiber and distance of the event from the fiber ? a unique 3D location cannot be obtained. While this limits our ability to estimate the source mechanism of events, we use patterns in the event amplitudes to categorize events into different types and determine the orientation of some nodal...

... ABSTRACT In many oil/gas fields and hydrofracking processes induced earthquakes result from fluid extraction or injection. The locations and source mechanisms of these earthquakes provide valuable information about the reservoirs. Analysis of induced seismic events has mostly assumed a double...

... ABSTRACT Source mechanisms of microseismic events, obtained using moment tensor inversion (MTI), can provide valuable information for monitoring hydraulic fracturing treatments. MTI is carried out for a dataset of 470 microseismic events recorded on two vertical monitoring wells in the Pembina...

... stress inversion west central alberta upstream oil & gas mechanism reservoir characterization cardium formation source mechanism annual meeting case study leaney information artificial intelligence seg seg international exposition inversion microseismic cluster analysis Aki...

... "tip-slip" on the auxiliary plane i.e. horizontal slip on horizontal structures. The reason for the ambiguity is because both the dip-slip and tip-slip mechanism produce the same seismic radiation pattern in the far field. The intersection of the slip plane and its auxillary for the source mechanism...

... ABSTRACT Small earthquakes occur due to natural tectonic motions and are induced by oil/gas production processes. In many oil/gas fields and hydrofrackings there are induced earthquakes due to fluid extraction or injection. The location and source mechanisms of these earthquakes provide...

...Downhole microseismic data processing: consistency of locations, source mechanisms and stress state Zuzana Jechumtálov Leo Eisner, and Jan Procházka, Seismik s.r.o.; Fangdong Chu and Jiaojun Rong, BGP Inc., China National Petroleum Corporation Summary We present results of processing...