Reservoir tectonic stress field affects the migration, hydrocarbon accumulation and natural fracturedistribution. The present stress field determines the state of natural fracture, extension azimuth of hvdrauhcfracture and deployment of development well pattern. Reservoir stress field research has become an importanttopic in the process of the oil and gas exploration and developing. The finite element analysis is an effective method for reservoir insitu stress simulation. This paper recommends calculation model and simulation method of finite element analysis in in-situ stress simulation, calculates the present stress field of C82 reservoirin Z 19 well block in Changqing Oilfield. The relationship between stress, reservoir parameters and productiondata was discussed. The simulation result can be taken as reference for well pattern design, optimization andoverall fracturing design.
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