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通过对中、新生代渤海湾盆地区演化过程及典型区带上古生界煤成气成藏条件的详细分析,对二者的关系进行了研究。结果表明渤海湾盆地中、新生代演化过程可划分为早—中三叠世、晚三叠世、早—中侏罗世、晚侏罗—早白垩世、晚白垩世、古近纪、新近纪—第四纪7个主要期次;依据早—中侏罗世、晚侏罗—早白垩世、古近纪沉积区与剥蚀区的叠加关系,可划分为持续沉降型、复合沉剥型、持续隆剥型3大类型的叠合单元,其中复合沉剥型又可细分为中沉新剥型、中剥新沉型、中复新沉型和中复新剥型4小类;对于寻找源自上古生界煤系源岩的煤成气藏而言,中剥新沉和中复新沉型最有利,持续沉降型较有利,中沉新剥型较不利,中复新剥型和持续隆剥型最不利。
Through the detailed analysis of the evolution process of Mesozoic and Cenozoic Bohai Bay Basin and the Paleozoic coal-formed gas accumulation in the typical zone, the relationship between the two is studied. The results show that the Meso-Cenozoic evolutionary processes in the Bohai Bay Basin can be divided into three types: Early-Middle Triassic, Late Triassic, Early-Middle Jurassic, Late Jurassic-Early Cretaceous, Late Cretaceous, Paleogene, Based on the superposition relationship between Early-Middle Jurassic, Late Jurassic-Early Cretaceous, Paleogene sedimentary and denudation zones, it can be divided into continuous subsidence type, complex subsidence type , Sustained profiling type three types of superimposed unit, which can be subdivided into complex Shen Shen Zhong Xin Pei Xing, Zhong Pei Xin Shen, Zhong Fu Shen Shen and Zhong Fu Xin Pei Shao 4 categories; For the search of coal-derived gas reservoirs originating from the Upper Paleozoic coal-bearing source rocks, it is most favorable for middle-pebble and intermediate-subsidence subsidence to be more favorable for continued subsidence, Long-term type and sustained the most unfavorable.