红柳构造坡折带层序地层学模式与油气分布

Relationship between Sequence Stratigraphy Models in Hongliu Structure Slope Belt and Distribution of Oil and Gas

在对地震、测井和钻井等资料详细分析的基础上,将济阳坳陷红柳地区下第三系划分出了7个三级层序、19个体系域.在层序地层单元划分和对比的基础上,结合断层上下盘地层厚度的差异变化所反映的古地形,认为济阳坳陷红柳地区在下第三系沉积时期,发育两种不同类型的构造坡折带,并建立了该区的构造坡折带层序地层学模式,研究了构造坡折带层序地层学模式与油气的关系,认为第Ⅰ,Ⅱ层序间的界面附近可形成有利的地层不整合覆盖圈闭与构造-岩性圈闭;第Ⅳ层序低位域可作为油气的运载层,在合适构造的匹配下,可形成有利的构造圈闭或构造-岩性圈闭,并对有利区带做出了预测.

On the basis of analysis of the data of seismic,well-log,7 sequences, 19 sedimentary system tracts were identified in lower Tertiary in Hongliu area of Jiyang depression. On the basis of the identification and correlation of stratigraphic units,and paleotopography reflected by the study of the variation of the thickness of strata, it is thought that in the west part of Hongliu area, two different kinds of slope belt were developed in the period of sedimentation of lower Tertiary, and that sequence stratigraphy models of steep slope belt were built up. The relationship between the sequence stratigraphy models of steep slope belt and the distribution of oil and gas was studied. It is considered that near the boundary of sequence Ⅰ and sequence Ⅱ transgression zone, there are unconformity oil traps and structurelithologic traps, that lowstand system tract of sequence Ⅳ can act as transgression zone, in suitable condition,structure trap or structure-lithic trap can be formed. At last,the orofitable area was oredicted.