.... The shales exhibit the lowest least-stress magnitude among all lithologies, and when the shale intervals are compared to each other, the carbonate content seems to control the trend. The least-stress magnitude in sandstones is highly variable. The commonly used Eaton's equation performs relatively poorly...

... slowness prediction eaton shear slowness poisson coefficient de oliveira geology reservoir characterization puc-rio janeiro carrasco modified warpinski method estimation catholic university ARMA 24-00134 Application of a Modified Warpinski Method for In-Situ Horizontal Stress Prediction...

...) geological horizontal stress accumulation by constant tectonic loading, and (iii) relatively uniform stress variation of principal stress components (Equation) along with depth. Eaton’s extended model could not capture the stress layering effect precisely and may introduce more uncertainty because of its...

... fracturing poisson complex reservoir bakken shale structural geology reservoir characterization upstream oil & gas reservoir geomechanics lower bakken shale zoback eaton hf geometry static young static poisson young fracture elastic anisotropy middle bakken geometry fork williston...

... waveform tony creek dual microseismic experiment eaton seismological research letter ARMA 22 0713 Waveform Similarity of Micro-seismicity at the ToC2ME Hydraulic Fracturing Experiment Site Jin Yang Department of Civil and Environmental Engineering, Western University, London, Ontario, Canada Bing Li...

... al., 2019), wastewater disposal (Ellsworth, 2013) and hydraulic fracturing (Bao and Eaton, 2016). In the case of hydraulic fracturing, the stimulation process is designed to fracture the reservoir rocks and this induces microseismic events that are usually too small to be felt at surface (M < 2...

... be managed more effectively. 1. Introduction An increase in seismic activity, including a number of events >M w 3 within the Western Canadian Sedimentary Basin (WCSB) (e.g., Bao and Eaton, 2016; Wang et al., 2016; Eyre et al., 2019) is believed to be related to a recent increase in hydraulic...

.... hydraulic fracturing pore pressure Eaton geomechanics Alberta Reservoir Characterization Fox Creek mechanism Upstream Oil & Gas reactivate operation Duvernay Formation fracture sequence seismicity event Coulomb stress change seismicity hydraulic fracture inversion interpretation...

..., sonic travel time, sonic porosity, and drilling exponent data were used to evaluate formation pore pressure. Normal compaction trendlines were established using depth-dependent relationships then integrated with Eaton and adapted Eaton equations to estimate formation pressures. Four of the five wells...

... are off, then pore pressure and fracture gradient estimates may be grossly underestimated or overestimated, both of which can result in severe wellbore instability and/or well control issues. To introduce a system of pore pressure calculations for oilfield, Eaton, B. A., 1975 developed a modified model...

... of leak-off pressure, the minimum stress, and the matrix stress ratio. Contrary to the widely-used Eaton model, results from this study suggest that the locally-calibrated matrix stress ratio, K0, appears to be approximately constant as a function of depth. As a guideline for deriving facture gradients...