In-Situ Stress Distribution Of Continental Heterogeneous Super Heavy Oil Reservoir In Xinjiang,Feng Cheng

The development of steam chamber is arrested in Feng Cheng oilfield in Xin Jiang because the oilfield has shallow buried depth,high viscosity,mudstone interlayers and strong heterogeneity.In order to form flowing channels and instruct fracturing designs,the geologic sedimentation and stress fields is simulated with the three dimensional geological mechanics model of the reservoir based on the measured results.The principal stress and lateral pressure coefficient can be calculated by presetting the overburden pressure,boundary conditions,rock mechanics and other parameters.Comparing the simulation results with the actual feature,the result can accord with the actual circumstance.In Zhong 1,Zhong 18,Zhong 32 and the main well areas,it is indicated that the reservoir is dominated by vertical stress and the interlayer has higher fracture pressure,the minimum principal stress and the Young's modulus,and weaker ability of fracture generation.In fracturing design,it should be perforated in or below the interlayer to control fracture height and avoid sand plugging.