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本文着重利用岩性标志和测井相标志对研究区的沉积相、亚相及微相类型及展布进行研究,认为本区长6油层为一套曲流河三角洲前缘沉积,曲流河三角洲前缘主要发育水下分流河道、水下天然堤、水下决口扇、河口坝、前缘席状砂和分流间湾等微相。其中以水下分流河道、分流间湾和河口坝沉积为主。研究区发育三角洲沉积体系,形成沿北北东方向分布的条带状、块状储集砂体,主要类型有分流河道、水下分流河道、决口扇、河口坝以及席状砂等砂体。长6下部长7油层组在纵向上沉积的旋回性构成了多套生储盖组合。
In this paper, the lithofacies and log facies markers are used to study the sedimentary facies, subfacies and microfacies types and distribution in the study area. It is concluded that the Chang 6 reservoir in this area is a set of meandering delta front deposits, meandering delta The leading edge mainly develops submarine distributary channel, underwater natural dike, underwater rupture fan, estuarine dam, front sands sand and shunt bay. Among them, underwater distributary channels, shunt bay and estuary dam dominated. Triassic sedimentary systems are developed in the study area to form strip-shaped and block-shaped reservoir sand bodies distributed along the north, east and east direction. The main types are distributary channels, underwater distributary channels, rivulets, estuarine dams and sand bodies such as sheet sand. Long 6 Lower Member 7 The cyclic nature of the deposition of the reservoir in the longitudinal direction constitutes a multi-reservoir combination of reservoirs.