孔雀河地区致密气藏有利构造带研究

Favorable tectonic belts of tight gas reservoirs in Kongquehe area

孔雀河地区位于塔里木盆地东北缘,在库鲁克塔格断隆和多期构造运动控制下,构造较为复杂,经历了5个构造沉积演化阶段:被动陆缘盆地阶段、挤压反转古鼻凸形成阶段、克拉通内凹陷阶段、克拉通内坳陷盆地发展阶段和类前陆盆地发展阶段,发育有寒武系、奥陶系等烃源岩储层,具备较好的油气成藏条件。通过石油地质条件、油气成藏条件研究,结合周边已钻探井资料认为,大西海构造带、维马克构造带是寻找志留系背斜构造圈闭有利区带;开屏构造带是寻找奥陶系背斜构造圈闭有利区带。

Located in the northeastern of the Tarim basin,Kongquehe area is relatively complex because of Kuruktag fault and multi-tectonic movement,and experienced five evolutionary phases:passive margin basin stage,squeeze reversal ancient noses form stage,craton depression stage,craton depression basin development stage,and foreland like basin development stage.The Cambrian and Ordovician hydrocarbon source rocks reservoirs are widespread in Kongquehe area,which have a good hydrocarbon accumulation conditions and tight gas exploration prospects.Based on hydrocarbon source rock,reservoir caprock combination and dense gas reservoir research,and combined with the wells data,this paper provides exploration recommendation among the favorable tectonic belt.