松辽盆地大安沿江地区葡萄花油层物源分析

 物源方向研究是沉积相研究的重要内容,物源方向代表了地质历史时期古水流的方向,控制了砂体的展布范围和延伸趋势。因此,物源方向的分析和研究对沉积相展布、储层评价及油气成藏等综合分析起着重要作用。本文结合盆地区域地质背景、重矿物组合、砂岩厚度及沉积砂体展布特征,对松辽盆地大安沿江地区葡萄花油层进行物源分析。结果表明:大安沿江地区葡萄花油层西区受西北物源(北西、北西西两分支)控制,南山湾地区受北部物源北东向分支控制。

Provenance Analysis on the Putaohua reservoir in Da'an Regions along the River,Songliao Basin

Provenance direction research is an important part of the sedimentary facies research. The provenance direction is able to represent the direction of ancient water flow in the geological historical period. Furthermore, it is able to control the distribution range and the extensive trend of the sand body as well. Consequently, the analysis and research on the provenance direction plays an important role in the comprehensive analysis involving the sedimentary facies distribution, reservoir evaluation, as well as oil and gas accumulations. Combining the analysis on basin regional geological background, heavy mineral assemblages, the thickness of sandstone, and the distribution characteristics of sedimentary sand body with each other, the provenance analysis on Putaohua reservoir is comprehensively conducted in Daan regions along the river, Songliao Basin. The results show that the west part of Putaohua reservoir in Daan regions along the rivers greatly controlled by northwest provenance (north-west branch and north-west-west branch); in the meantime, Nanshanwan region is mainly affected by the northeast branch of northern provenance.