应用坡折带理论寻找隐蔽油气藏

以层序地层学理论为基础，提出应用坡折带理论勘探陆相湖盆斜坡带隐蔽油气藏的方法。通过东营凹陷的中央隆起带北翼挠曲坡折带、陈家庄凸起南翼侵蚀坡折带、东营三角洲沉积坡折带勘探实例，分析和总结构造坡折带、沉积坡折带和侵蚀坡折带隐蔽圈闭的成因机制和特点。陆相湖盆斜坡带是低位体系域发育地带，也是隐蔽油气藏发育部位，在高精度勘探地区，可以根据坡折带勘探理论寻找隐蔽油气藏，四级层序的体系域限定储油砂体的部位及规模更具体，有利于勘探部署。图6参6

Searching subtle traps using the theory of slope break

Based on sequence stratigraphy principles, an exploration method for the subtle traps in lake basin slope break of land facies was put forward by using the theory of slope break. By analyzing and summarizing the formation mechanisms and characteristics of structural slope break, sedimentary slope break and erosional slope break in the areas of torsion slope break belt in north of the central uplift, the erosional slope break belt in south of Chenjiazhuang salient, and the sedimentary slope break belt of the Dongying delta in the Dongying Sag, it was suggested that the lake basin slope break zone of land facies was the developed area of lowstand system tracts and subtle traps, and the subtle traps directed by the theory of slope break in the exploring areas with high level exploration could be found. The system tract of grade four can concretely control the location and scale of sandstone bodies, and it is satisfactory for oil exploration.