海安油田双物源沉积研究

Dual Source Sedimentation in Hai’an Oilfield

为明确海安油田曲塘次凹阜三段沉积物源方向,给下一步勘探指导方向,应用碎屑岩轻矿物组合特征、岩屑成分差异分析、石英颗粒的阴极发光结合地震相对海安油田曲塘次凹阜三段物源方向开展了综合研究。研究表明:海安油田阜三段沉积物源分别是来自北部的泰州凸起和来自南部的通杨隆起,油田中部凹陷区域是双物源共同控制的叠加区,根据沉积砂体厚度以及发育范围,证明来自泰州凸起的物源较为充足。海安油田南北两部分储层物性、油井的产量存在明显差异,储层平面非均质性强。

In order to clarify the sediment source direction of the third member of Qutang sub-concave in Hai’an Oilfield,and provide guidance for further exploration,the application of clastic rock light mineral combination characteristics,the analysis of debris composition difference,the cathodoluminescence of quartz particles combined with earthquakes and the Qutan of Hai’an Oilfield,a comprehensive study was conducted on the source direction of the three-segment.The research indicates that the sedimentary sources of the third member of the Hai’an Oilfield are the Taizhou bulge from the north and the Tongyang uplift from the south.The central depression of the oilfield is a superposition zone controlled by the dual source.According to the thickness and development range of the sedimentary sand body,it is proved that the source from the Taizhou bulge is sufficient.Therefore,there are obvious differences in reservoir physical characteristics and oil well production capacity between the north and the south of Hai’an Oilfield.Reservoir plane heterogeneity is strong.