泌阳凹陷双江地区下第三系核桃园组沉积微相研究

Study of Sedimentary Microfacies of the Eogene Hetaoyuan Formation in the Shuangjiang Area,Biyang Depression

文章以泌阳凹陷双江地区核三段 (H3 )Ⅱ、Ⅲ、Ⅳ砂组为研究对象 ,对沉积微相做了一定程度的分析和研究 ,推导出该区发育的主要沉积微相有水下分流河道、河口坝、间湾、近岸水下辫状河道、远岸水下分流河道、扇间微相[1] (发育在西南部长桥扇三角洲和北部古城三角洲之间的沉积微相 )、远砂坝、席状砂八种微相类型。储层分布较分散 ,成藏条件苛刻 ,以河口坝、分流河道砂、席状砂为主。

The paper studies the second,the third and the forth sand sets member of Shuangjiang zones in Biyang depression,and analyzes the sedimentary microfacies,proves that this zone can be devided into eight sedimentary microfacies:underwater distributary channel,river mouth bar,interdistributary bay,nearshore underwater braided channel,farshore underwater distributary channel,microfaices between deltas,distal bar,sheet sand.The distribution of reservior in this zone is dispersal,and the condition of reservoir formation is not ideal,and reservoir is primarily river mouth bar,distributary channel sand and sheet sand.