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Stress Distribution in the upper shihezi formation from 1D Mechanical Earth Model and 3D Heterogeneous Geomechanical Model,Linxing Region,Eastern Ordos Basin,Central China

引用

Acta Geologica Sinica(English Edition) 2021年第3期95卷 976-987页

作者： JU Wei SHEN Jian QIN Yong WANG Geoff XU Ke LI Guozhang LI Chao Key Laboratory of Coalbed Methane Resources and Reservoir formation Process Ministry of EducationChina University of Mining and TechnologyXuzhouJiangsu 221008China Shandong Provincial Key Laboratory of Depositional Mineralization&Sedimentary Mineral Shandong University of Science and TechnologyQingdaoShandong 266590China School of Resources and Geosciences China University of Mining and TechnologyXuzhouJiangsu 221116China School of Chemical Engineering The University of QueenslandBrisbane St Lucia 4072QueenslandAustralia PetroChina Tarim Oilfield Company KorlaXinjiang 841000China

The upper shihezi sedimentary rocks in the Linxing region has been estimated with a significant volume of tight sandstone ***,lateral distribution of the present-day stress magnitude is poorly understood,which limits further gas ***,a one-dimensional mechanical earth model and a three-dimensional heterogeneous geomechanical model are built to address this *** results indicate that the strike-slip stress regime is dominant in the upper shihezi *** low stresses are mainly located around wells L-60,L-22,L-40,L-90,etc,and stress distributions exhibit the similarity in the Members H2 and *** differential stresses are relatively low in the upper shihezi formation,suggesting that complex hydraulic fracture networks may be *** fractures in the upper shihezi formation contribute little to the overall gas production in the Linxing *** addition,the minimum principal stress gradient increases with Young's modulus,suggesting that the stiffer rocks commonly convey higher stress *** is a strong interplay between stress distribution and heterogeneity in rock ***,the relative error between the predicted and measured results is less than 10%,implying that the predicted stress distribution is reliable and can be used for subsequent analysis in the Linxing region.

关键词： stress distribution numerical simulation tight sandstone gas upper shihezi formation Linxing region Ordos Basin

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