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中国东部以渤海湾盆地及其演化为典型代表,经历了地台发育、持续沉降,断褶充填、拉张翘倾、挤压坳陷等五个构造发育阶段,表现为手风琴式演化史,形成有三层“断—坳”结构:(1)中—上元古界的“断”,古生界的“坳”;(2)侏罗系的“断”,白垩系的“坳”;(3)下第三系的“断”,上第三系的“坳”。断陷与坳陷分别由拉张与挤压应力场所致,并不是“一张到顶”的,这种应力场的变化是由相邻洋壳板块俯冲倾角由小到大的变化所引起的。根据地震剖面资料,在中国东部可区分出八种断块油气藏类型。
The Bohai Bay basin in east China and its evolution as a typical representative, experienced five tectonic development stages of platform development, continuous subsidence, fold fold filling, stretching and tilting, squeezed depression, showing the accordion evolution history, forming There are three layers of “fault-depression” structure: (1) middle-upper Proterozoic “off” and Paleozoic “depression”; (2) Jurassic “off” and Cretaceous “depression”; 3) under the Tertiary “off” on the Tertiary “Au”. Faults and depressions are caused by extensional and compressive stress fields, respectively, and not “one-on-one”. The change of stress field is caused by small to large changes of subduction dip of the adjacent oceanic plate . According to the seismic section data, eight types of fault block reservoirs can be distinguished in eastern China.