东濮凹陷上第三系勘探前景分析

The Analysis of Exploration Prospects in Neogene in Dongpu Depression

东濮凹陷是渤海湾盆地的一部分。在渤海湾盆地其它坳陷中，上第三系是一个重要的含油气层系，但东濮凹陷至今尚未发现油气田。本文采用对比的方法，分析了上第三系勘探现状、石油地质条件和成藏机理。在讨论其利弊的基础上，指出明化镇组（Nm）应是它的主要勘探目的层，中央隆起带北部地质条件最佳，是最现实的地区，兰聊等主要断层附近及西部斜坡带具备形成地层、岩性、构造多种类型油气藏的条件。

Dongpu Depression is one part of Bohai Bay Basin. In many depressions in Bohai Bay Basin,Neogene system is an important oil-bearing series of strata,but there have been no reservoirs found in Dongpu Depression. In this paper,we have analyzed the present exploration situation of Neogene system,the petroleum-geological condition and the reservoir-forming mechanism by correlation method. On the basis of discussion on its advantages and disadvantages, it is indicated that Minghuazhen Formation (Nm) should be the major exploration target zone,with optimal geological condition on the northern part of the Central Uplift Belt which is the most realistic region. Near the major faults such as Lanliao and at the Westen Slope Belt is the favorable geological environment for forming the various types of reservoirs such as stratigraphic,lithological and structural reservoir.