关键词: 苏里格气田, 致密砂岩气, 长期稳产, 提高采收率, 关键问题, 技术对策, 数智化

Abstract: As a typical giant tight sandstone gas field in China, Sulige gas field has entered a stage of long-term stable production and enhanced gas recovery (EGR) after more than 20 years of large-scale commercial development. In response to critical problems, including the fragmentation of remaining gas in enriched zones, the deterioration of reserves in low-abundance zones, the difficulty of mobilizing resources in water-bearing zones, and the challenges in managing low-yield and low-efficiency wells, this study systematically examines the key issues constraining the long-term stable production and enhanced gas recovery of Sulige gas field:(1) the controlling effects of multi-scale reservoir architecture on the distribution of remaining gas; (2) the coupling mechanisms of stress, pressure, and flow fields in the three-dimensional development of multi-layer reservoirs; (3) the mechanisms of microscopic flow and macroscopic reserve utilization under complex gas-water relationships; and (4) intelligent diagnosis and optimal control of production dynamics throughout the full life cycle. Centering on these issues, the paper proposes the core technologies for reservoir architecture characterization and remaining gas recovery, synergistic production through three-dimensional well-pattern development, water- avoidance production in water-rich zones, and intelligent management of low-yield wells. To address the current limitations of gas field development technologies, future efforts should strive to make breakthroughs in key areas including the construction of digital twin system of gas reservoirs and fine-scale recovery of remaining gas, multi-layer three-dimensional development based on geology-engineering integration, quantitative characterization of microscale flow and development of water-control and gas-enhancement materials, and the establishment of intelligent development and management platforms. This study aims to provide theoretical guidance and technical support for enhanced gas recovery in the Sulige giant tight sandstone gas field, serving as a reference for the efficient development of other tight sandstone gas reservoirs under similar geological conditions.

Key words: Sulige gas field, tight sandstone gas, long-term stable production, enhanced recovery, key issues, technical countermeasures, digital intelligence