蠡县斜坡隐蔽油藏类型及勘探思路

Type of subtle reservoirs and exploration thought in Lixian Slope

杨帆 张峰

Yang Fan Zhang Feng

中国地质大学, 北京 100083; 中国石油华北油田评价部, 河北任丘 062552

China University of Geosciences(Beijing), Beijing 100083; PetroChina, Evaluation Department of Huabei Oil Field, Renqiu 062552

蠡县斜坡是饶阳凹陷西部的一个大型宽缓型继承性沉积斜坡,是冀中坳陷的重要靶区,隐蔽油气藏勘探将成为该区的首要勘探方向。蠡县斜坡南北方向分为平台区和斜坡区,东西向可分为外带、中带、内带。通过南北分带、东西分区的研究,认为蠡县斜坡北部平台区的滩坝相砂体和南部的三角洲砂体是主要的砂体发育带;斜坡不同部位隐蔽油藏成藏模式各不相同,以斜坡中带的多种类型隐蔽油藏作为寻找规模储量的最佳目标。

Lixian Slope is a large wide-gentle inheritance sedimentation slope that located in the western part of Raoyang Sag, which is an important exploration target of Jizhong Depression, Bohai Bay Basin. Exploration of subtle reservoirs will be the main exploration orientation in this region. Lixian Slope can be divided into platform terrain unit in the north and monocline slope terrain unit in the south. And from east to west, it can be divided into three zones: outer zone, middle zone and inner zone. According to the thorough investigation of this slope, it is believed that the sand bar and beach facies sand body in the north and the delta facies sand body in the south are the main sand body development areas. Different zones of this slope have different subtle reservoir forming patterns, and the various subtle reservoirs in the middle zone is the optimal target in search of large scale reservoirs.

https://doi.org/10.3969/j.issn.1008-2336.2009.04.033