陆相断陷盆地成藏组合体定义及划分——以东营凹陷为例

The concept and division of the reservoir forming assemblages in continental rift basin——case study of Dongying Depression

输导体系及其与油气运聚的关系是当前成藏研究的主要方向,成藏组合体是基于输导体系的成藏地质单元概念,是对复式油气聚集带的进一步细化,它的提出进一步完善了陆相断陷盆地成藏单元划分序列。根据断层、骨架砂体和不整合面等输导体系要素作用机理,建立了东营凹陷宏观输导体系格架,明确了油气主要运移路线,提出成藏组合体划分原则,以此为基础在平面上将东营凹陷划分为14个成藏组合体单元。

Conduit system and its relation with the oil-gas migration and accumulation are the main direction of the research on hydrocarbon reservoir forming. The reservoir forming assemblage is a kind of geological unit about hydrocarbon accumulation divided according to the conduit system,and it is the fined composite oil -gas accumulation belts. The suggestion of the concept of reservoir forming assemblage makes the division sequence of petroleum accumulation units in continental rift basin perfect further. The conduit system consists of faults, framework sands, unconformity beds and their compositions. Based on the mechanism of the elements of the conduit system, macroscopic conduit system framework was established in Dongying Depression. Main migration pathway and the division rule of the reservoir forming assemblage were pointed out,and 14 reservoir assemblages were divided in Dongying Depression.