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滨南油田沙三段沉积时期为湖盆断陷期,由于强烈的构造活动与充足的物源,发育近岸浊积岩、远岸浊积扇以及远岸滑塌透镜体三种类型的浊积砂体。本文在岩心观察的基础上,结合薄片鉴定、粒度分析等技术方法,对目标层位的沉积特征进行了分析。结果表明,研究区浊积砂体储层发育砾岩、砂岩、深湖泥岩等多种类型的岩性;粒度概率累积曲线与C-M图都显示出典型的浊积岩特征;沉积构造以递变层理、平行层理以及水平层理等为主,常见典型Bouma序列。通过对典型井的单井相分析,建立了三种浊积体储层的沉积模式。最后在分析了各类储层储集条件的基础上,指出本区浊积体储层物性差异很大,为中孔中渗到低孔低渗,并且远岸浊积扇的辫状水道微相砂岩最有油气富集潜力。
The sedimentary period of Es3 in Binnan Oilfield is a lake faulted depression. Due to the strong tectonic activity and abundant provenance, three types of turbidity such as nearshore turbidite, far-fluted turbidite fan and far-shore slip-lens are developed Sand body. In this paper, based on the core observation, combined with the identification of thin sections, particle size analysis and other technical methods, the sedimentary characteristics of the target horizon were analyzed. The results show that many types of lithology such as conglomerate, sandstone and deep lacustrine mudstones are found in turbidite sandstone reservoirs in the study area. The cumulative probability curves of granulometry and CM show typical turbidite characteristics. Layering, parallel bedding and horizontal bedding, etc., and typical typical Bouma sequences. Through the single-well phase analysis of typical wells, sedimentary models of three turbidite reservoirs were established. Finally, based on the analysis of the reservoir conditions of various reservoirs, it is pointed out that the physical properties of the turbidite reservoir in this area are quite different. Sedimentary sandstone has the most potential for hydrocarbon enrichment.