锦州J油田重矿物物源分析及沉积演化研究

Research on the Provenance of Heavy Mineral and Sedimentary Evolution in Jinzhou J Oilfield

明确沉积物源方向以及沉积演化模式,对于油田下一步的调整挖潜具有重要意义。利用5口井的重矿物含量数据,采用Q型聚类分析法和因子分析法对辽西凹陷锦州J油田东营组东二下段的重矿物组合特征、沉积物源方向和母岩类型进行了分析。在此基础上结合钻井和测试资料对目标区的沉积演化模式进行了分析。研究结果表明,目标区存在东、西两侧沉积物源体系,西侧物源来自于燕山隆起,东侧物源来自于中央凸起,目的层段均位于这两支物源沉积体系的边部。沉积早期以东侧物源为主,经过Ⅲ油组、Ⅱ油组至沉积晚期,逐渐过渡到以西侧物源为主,这两侧物源沉积体系呈现出此消彼长的变化关系。

It is of great significance to define the direction of sediment provenance and its evolution model for further adjustment in the oilfield.Using the percentage data of heavy minerals from five wells,the heavy mineral assemblage characteristics,the direction of sediment provenance and source rock types of the second lower section of Dongying formation in Jinzhou J Oilfield of Liaoxi sag are analyzed by Q-cluster and factor analysis method.Based on this,the sedimentary evolution model of the target area is studied by combining drilling and testing data.The results show that there are two provenances in the target area,the west side is from Yanshan uplift and the east is from central uplift,and the target horizon is located at the edge of two sedimentary systems.In the early stage of sedimentation,the east source is the main source,and after the third and second oil groups to the late stage of sedimentation,the west source is the main source gradually.The two sedimentary systems present a reciprocal relationship.