长岭凹陷腰英台地区青山口组沉积微相及其对有利储层的控制作用  

Sedimentary microfacies of Qingshankou formation and its control over favorable reservoir in Yaoyingtai area of Changling sag

作　　者：陈亚青[1,2] 侯伟[1] 樊太亮[1] 王宏语[1] 沈武显[1] 

机构地区：[1]中国地质大学能源学院,北京100083 [2]中国石油华北油田公司勘探开发研究院,河北任丘062552

出　　处：《大庆石油学院学报》2010年第2期16-20,25,共6页Journal of Daqing Petroleum Institute

基　　金：国家"973"重点基础研究发展计划项目(2005CB422103);中国石化华东分公司勘探先导项目(G1408-07-k-0148)

摘　　要：通过沉积微相研究和数据统计,分析青山口组重点层位的沉积微相类型和分布特征,及其对储层控制作用.结果表明:松辽盆地南部长岭凹陷腰英台地区青山口组发育湖泊相和三角洲相沉积.湖泊相由滨浅湖亚相组成,可识别泥滩、混合滩、砂质滩坝微相;该区三角洲相由三角洲平原亚相和三角洲前缘亚相组成,三角洲平原亚相可识别分流河道、分流间湾微相;三角洲前缘亚相可识别水下分流河道、水下分流间湾、河口坝、席状砂、远砂坝微相.不同类型的相、亚相和微相特征不仅控制该区岩相变化特征、砂体展布和砂体的储集性能,而且控制砂体的含油气性.河口坝、水下分流河道和滩坝砂体在储集性能和含油气性方面更具优越性,是勘探开发的重点.By the statistics of sedimentary microfacies and statistic research,this paper discusses the type and distribution characteristics of sedimentary microfacies of Qingshankou Formation,and its controlling effect on favorable sand.The results show that:The analysis result of abundant cores,logging,and well logging data reveals lacustrine facies and delta facies are main sedimentary facies types of Qingshankou formation in Yaoyingtai area of Changling Sag,Songliao Basin.Lacustrine facies are composed of shore-shallow lacustrine subfacies,which are subdivided into 3 sedimentary mircorfacies:sandy beach-bars,mixed beaches and muddy beaches.Delta facies are mainly composed of delta plain subfacies and delta frontal subfacies.The delta plain can be divided into distributary channel,inter-distributary bay microfacies.The delta front includes underwater distributary channel,underwater inter-distributary bay,estuary bar,sheet sand,distal sandbar microfacies.Different types of facies,sub-facies and microfacies will not only control the lithofacies change characteristics,sandbody distribution characteristics and reservoir performance of the sandbody,but also control oil bearing of sandbody.Because estuary bars,the underwater distributary channels and beach-bars have more excellent quality in reservoir performance and oil bearing,they are key targets of exploration and exploitation.

关 键 词：长岭凹陷 腰英台 青山口组 沉积微相 有利储层 

分 类 号：TE121[石油与天然气工程—油气勘探]