Recent tests at wells such as Longxing 1, Ping’an 1, and Puluye 1 have yielded high-yield industrial oil and gas flows, confirming the promising exploration and development potential of the Jurassic shale oil in the Sichuan Basin. However, the insufficient integration of geology and engineering has led to a lack of unified understanding of geological and engineering “sweet spots,” resulting in a relatively low level of exploration and development of Jurassic shale oil. Based on the concept of geological and engineering integration, a comprehensive geological evaluation approach has been constructed, with geological comprehensive research as the foundation, satisfying engineering requirements and achieving effective development as the goal, and engineering geological mechanics as the theoretical bridge. Taking Well G119H in the central Sichuan region as an example, an integrated geological and engineering evaluation was conducted, achieving a significant breakthrough of 20 tons of daily oil production and 6000 cubic meters of daily gas production in the Liang-2 section of Well G119H. This demonstrates that the integrated geological and engineering technology is an important technical strategy and theoretical system for the exploration and development of shale oil.