斜坡带低位扇砂岩体岩性油气藏勘探方法——以埕岛潜山披覆构造东部斜坡带为例

METHODS FOR THE EXPLORATION OF SANDBODY LITHOLOGICAL OIL-GAS RESERVOIR IN THE LOW?LEVEL FAN OF SLOPE-TAKING THE EAST SLOPE ZONE OF CHENGDAO AS AN EXAMPLE

针对隐蔽油气藏成因和分布规律复杂、勘探技术要求高的特点 ,把层序地层学方法应用于陆相湖盆隐蔽油气藏的勘探。在高分辨率层序地层研究的基础上 ,对沉积体系进行精细的解剖分析 ,研究沉积作用发生和演化的机制 ,探讨隐蔽油藏 (圈闭 )分布的边界条件 ,进而形成了关于斜坡带低位扇砂岩体隐蔽油藏 (圈闭 )分布与预测的地质方法和技术 ,初步提出了湖相盆地“低位扇”和“坡折带”的理论。以埕岛地区东部斜坡带为例 ,介绍了斜坡带低位扇砂体岩性油气藏的勘探思路和方法 ,使该类砂体油藏预测的成因类型和分布规律更加清楚 ,有效地指导了对该类油气藏的勘探。

For the characteristics of complication on the subtle oil_gas reservoir formation and its distribution,as well as demanding on the high technology,the sequence stratigraphic methodologies have been adopted to explorate subtle oil_gas reservoirs in lacustrine basin.Based on the study of high resolution sequence stratigraphy,authors carry out a fine analysis on the depositional system,study the sedimentation generation and evolutionary mechanism,as well as the boundary condition of subtle reservoir (trap) distribution,resulting in the geological method and technology on the sandbody subtle reservoir (trap) distribution and prediction of low_level fan in the slope zone.This paper preliminarily put forward the theories of 'low_level fan' and 'slope break zone' of lacustrine basin,by taking the east slope zone of Chengdao as an example.In this paper authors introduce the exploration idea and method on sandbody lithological reservoir of low_level fan in the east slope zone,making the genetic classification and distribution law of the sandbody reservoir prediction more clear.