Taking the rock of the sand-conglomerate reservoir in an area as the study object, we identified the in-situ stress and its direction through the hydraulic fracturing operation and geophysical logging data(FMI, Sonic scanner). The in-situ stress logging models for glutenite formation were established to calculate the stress longitudinal profile. In the light of this, the 3D numerical model was developed by tectonic model based on seismic data and then the in-situ stress distribution characteristics were studied by numerical simulation of finite element method, which were under the restriction of the measured stress data. The results indicated that the in-situ stress field was under the condition of compressive stress, which showed its ever-growing trend from northwest to southeast. Affected by faults and secondary structure, both horizontal and vertical principal stress in fracture zone decreased dramatically. Besides, there was high stress on the edge of fracture. The direction of horizontal maximum principal stress is E-W, but it was deflected due to the influence of faults and structure locally.