隐蔽圈闭解释模式的地层学意义及应用实例

摘要

为突破准噶尔盆地中部隐蔽油气藏勘探瓶颈,在层序地层学及坡折带理论指导下,首次提出“等时—圈闭地震地质解释模式”的名称和定义,并通过地层对比的等时性和形态圈闭的有效性,以及单个朵叶体构成独立隐蔽圈闭来论述该模式的理论和实践意义.在分析准中1区块Z6、Z7井“串层”地质问题的勘探实例中,总结出朵叶体间呈现类似“七巧板”之间拼合的隐蔽圈闭时空组合特征,解决了井间对比串层的难题.并提出地震剖面解释中“轴串而层不串”的工作方法和解释技巧,由此说明“等时—圈闭地震地质解释模式”的正确性和推广应用价值.%In view of the difficulties of subtle trap exploration in the middle Junggar Basin, based on the theories of sequence stratigraphy and slope break belt, it was proposed for the first time in this paper the name and definition of "isochronous-trap seismic geologic interpretation mode". The mode was discussed and practiced in single subtle trap formed by single lobes body according to the isochronous nature of sequence contrast and the effectiveness of morphology trap. In solving the problem of serial layers between well Z6 and well Z7, the time and space combination features of subtle trap among lobes bodies were summarized as jigsaw puzzles. A new interpretation method based on the idea of "connection along axial direction and isolation between layers" was put forward.