New Advances and Future Development in Oil and Gas Engineering Technology of Yanchang Petroleum During the “14th Five-Year Plan” Period

To address the development challenges of low-permeability, tight, and unconventional oil and gas reservoirs in the Ordos Basin and support the strategy of "stabilizing oil production and expanding gas output, this paper systematically reviews the key advancements in petroleum engineering technologies achieved by Yanchang Petroleum during the "14th Five-Year Plan" period and proposes future development directions. Breakthroughs were made through technological innovation, including the development and large-scale deployment of techniques such as shallow and ultra-shallow horizontal wells with "waveform" trajectories, rapid drilling of large well clusters, CO₂ hybrid fracturing, intelligent intermittent production, and refined water drainage gas recovery. These advancements led to a 33.78% reduction in drilling cycle, over 50% increase in post-fracturing production, and 20%-48% energy savings per mechanized production well. Consequently, the application of these new technologies contributed to a 2.03% increase in oilfield recovery factor and over 10% additional gas production, underpinning the achievement of a total oil and gas equivalent exceeding 20 million tons by the end of the "14th Five-Year Plan." Currently, Yanchang Petroleum faces challenges such as maintaining stable production in old areas, deep-layer development, and intelligent transformation. In the future, it will deepen the research and development of technologies such as intelligent guided drilling, CCUS integration, and full lifecycle water drainage and gas production, to facilitate Yanchang Petroleum's low-carbon intelligent transformation and sustained stable production.