塔里木盆地巴麦地区寒武-奥陶系圈闭类型及其油气勘探意义

Trap type and its significance in petroleum exploration of Cambrian-Ordovician formation in Bachu-Maigaiti region,Tarim basin

巴麦地区寒武-奥陶系圈闭划分为构造、地层岩性和复合型三个大类和背斜、断背斜、岩溶缝洞型、构造-岩溶复合型圈闭四个亚类。圈闭的发育和分布受控于断裂、不整合面的发育分布,具有多期次、多层位特点,平面上具有明显的分带性,垂向上不同时期的圈闭相互叠置。巴楚地区的构造圈闭和麦盖提斜坡玉北地区的岩溶缝洞型圈闭是今后勘探的主要目标和方向。

The trap of Cambrian-ordovician formation in Bachu-Maigaiti region are divided into three types,including structural trap,stratigraphic-lithologic trap and composite trap and four subtypes,including anticline trap,faulted anticline trap,structure,karst seam hole.The development and distribution of traps is controlled by fault zone and unconformable side,and has characteristics of multistage and multilayer.The traps are distributed in zone on the plane and are superimposed vertically at different stages.Structural trap in Bachu area and karst trap in YuBei area of the maigaiti slope are the main target and direction for exploration in the future.