论文部分内容阅读
鄂尔多斯盆地安塞油田晚三叠世延长组长101油层段为勘探新层系,本文着重对安塞油田延长组长101期沉积类型、沉积微相进行系统研究认为,研究区长101油层段发育曲流河三角洲沉积体系,主要为三角洲平原亚相,进一步划分出分流河道、天然堤、决口扇、河漫滩4种沉积微相并对不同微相的特征进行了详细的论述。进而分析了研究区长101油层段3个小层平面展布规律,认为分流河道是主要的油气储集砂体。
Chang 101 reservoir of Late Triassic Yanchang Formation in Ansai Oilfield, Ordos Basin, is a new exploration system. This paper focuses on systematically studying the depositional facies and sedimentary microfacies of Yanchang Formation 101 in Ansai Oilfield. Meandering river delta sedimentary system, mainly delta subfacies, further divided into four types of sedimentary microfacies such as distributary channel, natural dike, ripple fan and river floodplain and discussed the characteristics of different microfacies in detail. Then the paper analyzes the plane distribution law of three small layers in the section of Chang 101 reservoir, and considers that the distributary channel is the main oil and gas reservoir.