南阳凹陷古近系核桃园组沉积微相研究  

Sedimentary microfacies in the Paleogene Hetaoyuan Formation,Nanyang depression

作　　者：李海燕[1] 

机构地区：[1]中国石油大学资源与信息学院,北京昌平102249

出　　处：《沉积与特提斯地质》2008年第4期44-49,共6页Sedimentary Geology and Tethyan Geology

基　　金：国家973项目重大基础研究前期研究专项(2002CCA00700)

摘　　要：综合利用岩心、测井、录井及相关测试资料,对南阳凹陷东部核桃园组核二段沉积微相进行了系统研究。结果表明:该区核桃园组发育两套沉积相,北部为一套曲流河三角洲沉积,主要发育水下分支水道、河口坝、远砂坝、支流间湾4个微相;南部为冲积扇相,发育辫状沟道和辫状沟道间微相。其中水下分支水道、河口坝和辫状沟道砂体为储集层骨架砂体。认为油气的聚集受沉积微相的控制,水下分支水道和辫状沟道的储集性能最好,河口坝次之,远砂坝较差,为油田开发方案的调整和动态分析提供了可靠的地质依据。The analysis of the sedimentary microfacies in the second member of the Hetaoyuan Formation, Nanyang depression is based on the cores, well logs and relevant analytical data. Two sets of sedimentary facies have been distinguished： the meandering stream-delta facies including the subaqueous distributary channel, channel mouth bar, distal bar and interdistributary bay microfacies in the northern part, and alluvial fan facies including braided channel and braided interchannel microfacies in the southern part. The hydrocarbon accumulation is dominantly controlled by the sedimentary microfacies cited above. The reservoir quality is best in the subaqueous distributary channel and braided channel sedimentary microfacies, followed by channel mouth bar and distal bar.

关 键 词：南阳凹陷 沉积微相 曲流河三角洲 冲积扇 

分 类 号：P121.3[天文地球—天体测量]