陕北富县探区长6沉积微相特征及其与石油富集关系研究

本文通过野外露头剖面、岩心观察和测井曲线资料,确定了陕北富县探区长6油层组的沉积微相特征,利用测井资料建立测井相,利用多种沉积相的识别标志及特征,进行长6油层组沉积相、沉积微相的划分,并进行各小层沉积微相及砂体平面展布规律研究。依据测井曲线综合解释、岩性特征及试油、试采资料,分析石油富集规律。通过以上综合研究,分析沉积微相与石油富集之间的关系,从而对有利含油砂体进行预测。长6油层组沉积属于三角洲相和湖泊相,主要发育三角洲前缘亚相,沉积微相以水下分流河道和分流间湾为主,骨架砂体为水下分流河道,以北东物源方向为主,总体来看砂体的发育完全受控于沉积微相的展布,均呈北东—南西方向条带状展布。长6油层组油藏主要分布在三角洲前缘水下分流河道砂体,主要受岩性控制,分布不均匀,属岩性油藏,通过生、储、盖组合综合评价,认为骨架砂体水下分流河道为有利沉积相带。

Research on Sedimentary Microfacies Characteristics of Chang-6 and the Relationship with Oil Enrichment in Fuxian Exploration Area of Shanbei

Based on outcrop section,cores and well logs,the sedimentary microfacies characteristics of Chang-6 oil-bearing beds are identify,based on log data and logging phase are established,based on a variety of sedimentary facies identifications and characteristics,sedimentary facies and sedimentary microfacies of Chang-6 oil-bearing beds are divided,distribution law of sedimentary microfacies and sand body planar are,studied.According to log comprehensive interpretation,lithology and testing,production test infor...