论文部分内容阅读
为了解决妨碍致密砂岩天然气勘探开发中的地层损害问题 ,以川西致密砂岩气藏为研究对象开展了国家重点科技攻关。项目研究立足于钻井完井中有效地保护天然裂缝 ,以屏蔽式暂堵技术思想作指导 ,通过建立井筒周围原地裂缝参数预测技术、裂缝性致密储层的敏感性和损害评价技术 ,基本形成了适于裂缝性致密砂岩气层保护的钻井—完井—增产配套技术系统 ,关于裂缝性致密砂岩气层开发获得了“保护与改造并举 ,二者相得益彰”的新认识。文章分析了面临的技术—经济—环境方面的严重挑战 ,提出要不断完善适应各种复杂地质对象的能力 ,在保护致密气层新技术开发中应特别注重与环境保护需求的结合。
In order to solve the problem that hinders the formation damage in the exploration and development of tight sandstone natural gas, the key national scientific and technological research is carried out on the tight sandstone gas reservoir in western Sichuan. Based on the effective protection of natural fractures during drilling and completion, the project is guided by the technical thinking of temporary shielding by shielding. By establishing the prediction technology of the in-situ fracture parameters around the wellbore and the sensitivity and damage evaluation of fractured tight reservoirs, the project basically formed The drilling, completion, stimulation and production technology system is suitable for the protection of fractured tight sandstone gas reservoirs. The development of fractured tight sandstone gas reservoirs has gained a new understanding of both protection and transformation, and they complement each other. The paper analyzes the serious technical-economic-environmental challenges we face and proposes that we constantly improve the ability to adapt to various geological objects. In the development of new technology for the protection of tight gas layers, we should pay special attention to the combination of environmental protection needs.