... mine. reservoir geomechanics stress calibration Raasakka Reservoir Characterization Upstream Oil & Gas ln-51tu rock stress geometry haulage level metals & mining ground surface solver method coefficient machine learning in-situ rock stress stress measurement international...

... Artificial Intelligence stable state coefficient reservoir geomechanics minimum horizontal principal stress pressure coefficient formulae Reservoir Characterization stress magnitude crust pore pressure coefficient stress shape factor principal stress maximum horizontal principal...

... stepwise regression coal field coefficient gravity geostress field Rock Stress and Earthquakes Xie (ed.) © 2010 Taylor & Francis Group, London, ISBN 978-0-415-60165-8 The method of bound regression analyse of the initial geostress field and its application Shuxin Yang Beijing Jiaotong University...

... is established. The finite element equation is derived on the basis of the orthotropic dual media mathematical model, and also the relative two dimensional program of finite element method is developed. Taking the ZP-1well in Qinshui Basin as an example, the effect of the permeability orthotropic coefficient...

... will hinder the construction program and add the construction cost. Therefore, basing on the mechanics analysis of linear elastic rock, the formula is established among the maximum and minimum horizontal stress with the tectonic stress coefficient, considering that horizontal principal stress is made up...

... orientation maximal coefficient maximal horizontal stress reservoir geomechanics stress relief measurement depth range stress orientation machine learning stress variation in-situ stress measurement tectonic stress minimal horizontal stress equation Upstream Oil & Gas regression equation...

... that sliding begins when the ratio of shear to normal stress on contact surfaces reaches the value of static friction coefficient. After that sliding occurs and the coefficient of friction decreases and reaches Figure 1. Stick-slip instability. the dynamic friction coefficient (Scholz 1998; Xing, Mora et al...

... value, coal seam fracture coefficient size and energy method, four grades of A,B,C,D are divided for coal fracture degree at wellbore direction and reservoir plane, and coal fracture classification stan-dard is determined. Appling the classification method and standard, the distribution regularity...

... background stress state has its greatest principal compressive stress plunging 11° to N295°W, a large effective coefficient of friction 0.76 for Longmenshan area, and 75MPa for the magnitude of greatest principal stress, which is far less than the overburden pressure estimated from the pressure intact rock...