【摘要】 通过岩心描述、样品和剖面结构分析,以岩石学研究为基础、BYT井为代表,详细研究了珠江口盆地白云凹陷古近系珠海组砂岩储层沉积学特征,从中划分出三角洲和陆棚2种沉积体系,探讨了此2种沉积体系的基本特征,识别出连续进积型和连续退积型2种三角洲沉积演化序列,建立了珠海组三角洲沉积模式。在此基础上,分析孔隙类型和储层控制因素,将珠海组砂岩储层划分为4类,并进行了综合评价。提出水下分流河道砂体是最有利储层发育的微相类型,其次为前缘席状砂、水下主河道、河口坝和远砂坝微相。对珠江口盆地白云凹陷BYT井的储层沉积学研究,有助于我国南海油气资源的勘探开发。更多还原

【Abstract】 Based on core description,sample and section structure analyses,and petrology characteristics,the sedimentology characteristics of sandstone reservoir of Paleogene Zhuhai Formation in Baiyun Depression are studied,taking BYT well as a representative.The reservoir is divided into two sedimentary systems:marine delta and continental shelf,of which the characteristics are discussed.Two kinds of deltaic sedimentary evolutionary sequences are recognized,including progradation and retrogradation,and the deltaic depositional model of Zhuhai Formation is established.The pore types and reservoir controlling factors are analyzed,and the sandstone reservoir of Zhuhai Formation is divided into four types.Subaqueous distributary channel is the most favorable facies belt,followed by frontal sheet sand,subaqueous main channel,mouth bar and distal bar.This study on the reservoir sedimentology of BYT well in Pearl River Mouth Basin is of advantage to the exploration of oil and gas resources in South China Sea.更多还原