Abstract
The principal focus of geostress studies in the Shunbei area has been on stress measurements, one-dimensional stress profiles, and the stress distribution across planes. However, research on the three-dimensional (3-D) geostress field of the Ordovician system is relatively lacking, and investigations into the stress states of faults have not yet been conducted, thereby hindering the progress of oil and gas exploration and development in this area. This article comprehensively utilizes geological, logging, and seismic data to establish a high-resolution 3-D structural geological model. Based on the results of rock mechanics tests on core samples, acoustic logging data, and 3-D pre-stack inversion datasets, a rock mechanics model for the study area is constructed. In addition, employing finite element simulation methods, the present-day geostress field of the Ordovician system in the study area is numerically simulated, thereby establishing the 3-D geostress field and elucidating the distribution characteristics of the Ordovician system's geostresses. It systematically analyzes the stress state and activity of the strike-slip faults, highlighting their impact on drilling productivity. Our results provide a basis for the selection of drilling targets and well site deployment. The results lay a foundation for deepening the understanding of the interaction mechanisms between the geological structures and underground stress fields, guiding petroleum resource development, and promoting related geological scientific research in the Ordovician system or geostress mechanics.