Research on the Inversion Method of Geostress Field in a Certain Block of Daqing

The geostress field is crucial for oil and gas resource evaluation, oil and gas reservoir exploitation, drilling and completion engineering, etc. It is crucial to clarify the distribution of geostress and grasp the magnitude and direction of geostress. This study focuses on a certain block in Daqing Oilfield and uses seismic, logging, and geological data to establish a three-dimensional geological structure, fault, natural fracture, and attribute model on the Petrel platform. The stress field is simulated using finite element theory. Research has found that faults and cracks significantly affect the stress field, leading to changes in size and direction. The distribution range of principal stress is 40-55MPa and 40-58MPa, with vertical stress ranging from 40-70MPa. The simulation results verify reliability and provide a foundation for future fracturing construction. These findings will help to better evaluate underground conditions and guide the development of oil and gas resources.