临邑洼陷油气二次运移特征研究

A Research on Secondary Migration of Oil and Gas in Linyi Sag

临邑洼陷是济阳坳陷惠民凹陷的次级负向构造单元。文中详细分析了洼陷内油气二次运移的输导系统、运移时期、运移方式、运移方向，确定了洼陷内油气二次运移时期；输导系统由砂层、不整合面、断层、火成岩侵入体组成；运移方式为渗流和涌流；洼陷内油气具有“离心式”的区域运移规律。位于凹陷附近的隆起带和斜坡带及长期继承性隆起是油气滚动勘探的有利区域。

Linyi sag is a subsidiary negative structure element in Jiyang depression. This paper analyzes in detail the transporting and conducting system, time, mode and direction of secondary migration of oil and gas in the sag. The transporting and conducting system is consisted of sandstone layers, unconformities, faults and volcanic intrusions; migration modes are seepage flowing and shoving; and oil and gas migration obeys 'centrifugal' regional migration law in the sag. The uplift zone, slop zone and inherited rift are favorable areas for progressive exploration and development.