四川盆地中国石化探区天然气勘探开发领域与技术攻关方向

Exploration domains and technological breakthrough directions of natural gas in SINOPEC exploratory areas,Sichuan Basin

四川盆地中国石化探区天然气勘探开发成果显著,自新场气田发现以来,勘探开发领域逐步扩大,储量和产量快速增长。地质理论认识深化与关键技术进步是推动天然气勘探开发大发展的主要动力。中国石化探区天然气资源丰富,有利目标类型多,常规天然气整体探明程度为16%,页岩气勘探尚处于初期阶段,根据HCZ模式预测,中国石化探区天然气(含页岩气)勘探开发仍将快速发展,具备年均新增探明天然气地质储量(1600~2000)×10^8 m^3的潜力。围绕页岩气、海相碳酸盐岩天然气、陆相致密砂岩气等领域的高效勘探开发,需要加强深层海相页岩气增产降本的钻完井、压裂技术攻关,以及陆相、海陆过渡相页岩气资源潜力评价和勘探开发适应性技术准备,加强深层超深层礁滩相碳酸盐岩储层、风化壳储层预测和超深井高效钻井、压裂测试技术攻关,加强陆相致密砂岩气地质—测井—地震一体化甜点预测和低成本直井多层压裂技术攻关。

Natural gas exploration in SINOPEC exploratory areas in the Sichuan Basin has achieved rapid development.Since the discovery of Xinchang gas field,exploration domain of natural gas has been expanded gradually,with both reserves and production growing rapidly.Deepening of theory of natural gas geology and progress of key technology was major driving forces of great development of natural gas industry.Considering the rich natural gas resources,various types of favorable targets,exploration degree of 16%of conventional natural gas,and the initial stage of shale gas exploration,it’s predicted by HCZ model that the exploration of natural gas including shale gas in SINOPEC exploratory areas in the Sichuan Basin will remain rapid development with proved reserve increasing by(1600~2000)×10^8 m^3/a.The development strategy in the future is to vigorously develop shale gas,steadily promote marine conventional natural gas,and continually research of continental tight sandstone gas.Aiming at the efficient exploration of the three resource types,the following tasks need to be strengthened:Prediction of deep and ultra-deep reef-shoal reservoirs,weathered crust reservoirs,and technological breakthrough of efficient drilling and fracturing test of ultra-deep wells;technological breakthrough of geological-logging-seismic integrated sweet spot prediction of tight sandstones and low-cost multi-layer fracturing of vertical wells;technological breakthrough of increasing-yield and reducing-cost drilling,completion and fracturing of deep marine shale gas;resources potential evaluation and adaptive exploration&development technologies preparation of continental and transitional shale gas.