圈闭群:一种可能的新油气圈闭分类方案

Trap groups: a possible classification scheme of hydrocarbon trap

在对全球大陆边缘主要含油气盆地圈闭类型及特征调研和分析后,发现目前圈闭分类方案存在的问题和不足,为更好的指导油气勘探,提出了"圈闭群"的概念,即具有成因联系、在同一地质作用中伴生的一系列圈闭,可为构造圈闭也可为地层或(和)岩性圈闭,而不局限于圈闭的几何形态、遮挡条件或封闭机制。同时给出了基于"圈闭群"概念的新的圈闭分类方案,该分类方案包括底辟构造相关圈闭群、生长断层相关圈闭群、挤压构造相关圈闭群、伸展构造相关圈闭群、扭动构造相关圈闭群、沉积、成岩相关圈闭群、水动力相关圈闭群、复合成因相关圈闭群共8类圈闭群,最后给出了各圈闭群在主要大陆边缘盆地中的分布。

After the investigation of trap types and characteristics in the major petroliferous basins on continental margins,it is found that there are some problems and deficiencies in the current trap classification schemes.In order to better direct the oil-gas exploring,the new concept of trap groups is introduced,referring to those genetically related to the traps associated in the same geological process.They may be structural traps or/and lithologic ones and they are not limited to their geometric configuration,sealing condition or trapping mechanism.In addition,a new trap genetic classification scheme based on trap groups is proposed,including eight types of trap groups： trap group related to diapir structure,trap group related to growth fault,trap group related to compressional structure,trap group related to extensional structure,trap group related to torsion satructure,trap group related to deposition and diagenesis,trap group related to hydrodynamic force and trap group related to synthetical genesis.At last,the distribution of these trap groups in major oil-bearing basins of continental margins is provided.