Thoughts on Shale Oil Development in Continental Fault Basin in Jiyang Depression

Jiyang Depression is a typical continental fault basin, and its beneficial development is of great significance for the sustainable development of shale oil in China. Shale oil reservoirs in continental fault basins have complex tectonics, diverse lithofacies types, and complicated fluid properties, making it difficult to achieve beneficial development. Significant progress was made in Jiyang Depression after three stages of exploration, including research and evaluation, experimental development, and large-scale production construction. To this end, the challenges faced by shale oil developing technologies, such as high-quality sweet spot evaluation, three-dimensional development and optimization, efficient reservoir stimulation, reservoir energy energy replenishment to enhance oil recovery, etc. were systematically summarized. Technical measures and beneficial development management models such as double sweet spot evaluation of engineering and geology, optimization of the combination of well pattern and layer system, CO₂ pre-pad fracturing using extreme jet and dense perforation, gas injection for energy replenishment, and chemical enhanced oil recovery. The shale oil developing technologies and management model system for the continental fault basins were initially formed, suggestions on the future development direction were put forward, providing a reference for the efficient development of shale oil in continental fault basins.