... displacement proceedings Symposium vertical stress US government complex reservoir instrumented pillar Upstream Oil & Gas calibration roof sag rib displacement coal seam gas Ground Control loading condition average roof sag fracture strength field observation instrumented site coal-mass...

... ABSTRACT: Mining-induced fracture fields play important role in gas extraction of underground coal mines. Low concentration of extracted gas has been observed during the mining of gas burst-prone coal seams in Shaqu Coal Mine, Shanxi province, China. Theoretical analysis and field observation...

... around the mid-height of coal pillars was indicative of continuing vertical and horizontal displacements, which was supported by field observations. drilling operation field observation Reservoir Characterization displacement immediate roof april 12 metals & mining horizontal...

... mechanisms that cause fault reactivation are unclear. This study reports a systematic analysis of several felt induced seismicity field observations using geomechanical models to understand the mechanisms that cause the fault reactivation. The field observations indicate that felt induced seismicity occurs...

... associated with the attributes while rock engineering systems (RES) approach was employed to quantify the interactions between the factors affecting the ground conditions. 24 independent cases were selected to validate the proposed GI by comparing predictions given by the GI with the field observations...

... subsidence crater exploitation geometry metals & mining cavity growth interferometry mechanism cavity estimation acquisition displacement upstream oil & gas field observation application fluid dynamics home acquisition ground subsidence model extension underground...

... of a rationales used to develop a support strategy for an isolated drift within squeezing Talc-Schist rock at depth. Field observations, numerical modelling simulation, and trials of a variety of support systems were used to assess conditions and to establish a path forward for long term stability. support...

... after 5 months of injection (i.e. when the pressure reached a critical threshold pressure). Assuming a fracture zone of limited height, they were able to match all available field observations, including the transient evolution of uplift and pressure, as well as the shape of surface deformations...

... thermal expansion Midstream Oil & Gas freezing soil pressure Pipe Temperature soil pressure Upstream Oil & Gas field observation pipeline pipe strain Fairbank expansion pipe deformation creep strength 1. Introduction The interest in gas development in northern oil and gas fields...

... field observation propagation path stress field reservoir geomechanics propagation Magnitude damage zone deformation Simulation Lyakhovsky evolution internal pressure intensity Rock Mechanics for Indust Amadei, Kranz, Scott & Smeallie (eds) ¸ 1999 Balkema, Rotterdam, ISBN 90 5809 052 3...

... one condition has been postulated to be followed by the other, and cyclic situations have frequently been suggested. In brief, a wide range of behavior is envisioned to rationalize field observations. In the Upper Crust, evidence for fault-zones acting as seals to fluid migration comes primarily from...

... INTRODUCTION ABSTRACT: This paper reviews field observations of the hydraulic fractur- ing process, in particular multiple fracturing and high fracture pres- sures. The limitations of existing concepts in fracture mechanics and hy- draulic fracturing are reviewed in light of typical features...

... wellbore integrity orientation reservoir geomechanics Olmo Wellbore Design awp shale shear failure ellipticity failure envelope Reservoir Characterization Upstream Oil & Gas field observation earth stress regional stress field borehole stability stress orientation principal...

... book on Explosives and Rock Blasting (1987). Some of these theories are based on field observations and experience, laboratory testing, trial-and-error, and theoretical models. Other investigators have studied and reported on rock fragmentation, the fracturing process, and crack propagation such as H...

... equation field observation Sergipe rock mass deformation 26th US Symposium on Rock Mechanics/Rapid City, SD /26-28 June 1985 Comparison of numerical modeting with predictions from laboratory tests and field observations of deformation i a potash mine in Sergipe, Brazil ALVARO MAIA DA COSTA Petromisa...

... through numerical modeling and laboratory experiments of the hydraulic fracturing process. Field observation of natural step cracks indicates that the mechanism is applicable to the genesis of jointing patterns in rock. Such features should not be confused, therefore, with steps caused by shear...