塔东英吉苏坳陷中生界油气勘探前景

在塔里木盆地东部英吉苏坳陷钻探的华英参1井,发现了含油的三叠系,并证实中、下侏罗统煤系有良好的生烃条件。英吉苏坳陷的形成经历了早期拱张裂陷、中期挤压改造、晚期稳定覆盖等三个阶段,具有类前陆盆地的三分性地质结构,油气资源潜力大;预测它是由四个含油气系统、四大断裂构造复式油气聚集带组成的大型成油体系,中央挤压断裂带油气最富集,建议应继续加强勘探。

Oil and Gas Potential of Mesozoic Hydrocarbon in Yingjisu Depression, Eastern Tarim Basin

Oil-bearing Triassic was discovered in Well Huayingcan-1 drilled in the Yingjisu Depression of Eastern Tarim Basin and good source rock was proven in the Middle-Lower Jurassic coal measures. There were three stages for forming Yingjisu depression, namely the early stage of bending, gaping, faulting, the middle stage of compression transformation and the late stage of stable overlying, and the geological configuration of the depression as a foreland basin was threefold. Hydrocarbon potential in the depression is great. It is predicted that it was a large-scale oil pooling system combined by 4 oil-gas bearing systems and 4 big complex oilgas accumulation belt of rupture structures. Oil-gas in the central compressional rupture belt is rich. So we suggest the next exploration.