鄂尔多斯盆地李安沟门油田长4+5地层沉积特征

Sedimentary characteristics of Chang 4+5 reservoir in Liangoumen Oilfield,Ordos Basin

本文以鄂尔多斯盆地为例,通过岩心描述、录井、岩石薄片等资料对李安沟门油区三叠系延长组长4+5的地层划分、沉积环境和沉积微相进行了综合分析,探讨了砂体在空间上的展布,以识别出水下分流河道,河口沙坝,分流间湾等沉积微相。

The stratigraphic classification,sedimentary environment and microfacies of Triassic Chang4+5reservoir inYanchang Formation,Liangoumen Oilfield,Ordos Basin are described in this article via core description,logging,and rock slice.The distribution of the sand body is explored to identify the microfacies of underwater distributary channels,river mouth bar andinterdistributary bay.