油气成藏系统的概念及其在东营凹陷博兴地区的应用

对含油气系统进行了简要评述 ,指出了经典的含油气系统划分方法存在的局限性 ,提出了油气成藏系统的概念及其划分方法。研究认为 ,含油气系统在空间上是一个以“源”为核心且相对独立的油气地质单元 ;油气成藏系统是在含油气系统内或之间的一个以“藏”为核心且相对独立的油气运聚单元。油气成藏系统划分的依据是控制油气运移聚集指向的高势面及其他遮挡面 ,成藏系统对勘探程度较高地区的油气勘探评价更具实用价值。对东营凹陷西南部地区的油气成藏系统进行了划分 ,划分出西部高青断裂带、中部金家正理庄樊家鼻状构造带、东部纯化梁家楼和北部小营平方王等 4个油气成藏系统。各成藏系统大致以油气运移的“分水岭”为界 ,其成藏特点及勘探潜力均有较大差别

Petroleum migration-accumulation system concept and its application in Boxing area of Dongying depression

The shortages of traditional petroleum system method and the concept of petroleum migration accumulation system were discussed. A new concept and division method of the petroleum system was presented. The petroleum migration accumulation system centers on the hydrocarbon pools. The system includes occurrence area of oil and gas pools and is related to the source rock. This system is a relatively independent geological unit of petroleum migration and accumulation. The division of petroleum system depends on the number of the effective source rocks in the basin, but the division of the petroleum migration accumulation system is mainly based on the high hydrocarbon potential interfaces, which control the directions of hydrocarbon migration and accumulation. The new division method has been successfully applied in Boxing area of Dongying depression in Bohai Bay basin. Four petroleum migration and accumulation systems were classified in this area. The result shows that it is of more useful value to the area with the high level petroleum exploration.