川西侏罗系致密砂岩气藏作为川西中浅层主力开发气藏,为气田的持续稳产作出了重要贡献,针对该致密砂岩气藏近年来因开发中后期导致的产能递减加快、优势目标减少、加密难度增大等问题,通过地质物探一体化开展气藏精细描述,深化构造、沉积相、砂体展布、储层等方面认识,评价开发潜力,发现有利潜力区块,提高部署及跟踪精度;通过建模数模一体化动态认识气藏,强化压力、渗透率、剩余储量等方面的认识,总结开发规律,优化部署参数,进而提高评价和开发部署质量;通过地质工程一体化实现跨专业融合,革新技术指标、评价标准、部署方式等方面认识,突破专业壁垒,提高整体开发效益。地质物探一体化、建模数模一体化、地质工程一体化技术思路的合理运用,有效支撑了川西侏罗系致密砂岩气藏动态分析和研究、产能评价与建设,使气藏中后期的开发效果明显改善、采收率明显提高,保障了气藏的持续稳产,实现了效益开发目标,可为同类气藏开发提供技术借鉴。

As the main development gas reservoir of the middle-shallow layer in West Sichuan, the Jurassic tight-sandstone gas reservoir has made great contributions to its sustained and stable production. In view of its problems such as productivity decline accelerating, quality goals reducing and encryption difficulty increasing, in mid-late production stage, this study uses geology-geophysical exploration integration method to carry out fine description to deepen the understanding of the structure, sedimentary facies, sand body spreading, reservoir bed, and so on, to evaluate development potential and discover vantage block. Modeling-numerical simulation integration is used to understand gas reservoir dynamically, deepen the understanding of the pressure, permeability, remaining reserves, and so on, and summarize the development rules and optimize deployment parameters, further improve the quality of evaluation and development and deployment. With geology-engineering integration, cross-discipline integration is achieved, the understanding of technical description, evaluation criterion, allocation methods are reformed and so on. Finally, we break through profession barriers and upgrade overall development efficiency. The application of geology-geophysical exploration, modeling-numerical simulation and geology-engineering integration effectively provides robust support for the dynamic analysis and studying, capacity evaluation and construction of the Jurassic tight-sandstone gas reservoir in West Sichuan, significantly improved its mid-late production stage's development effect and the recovery rate. In this case, a continuous and stable production with development economics have been realized, which provides technical reference for the development of gas reservoirs of the same nature.