永安镇油田永3-1断块沙二段5—6砂层组河控三角洲前缘沉积模式  

Study on combination and features of fluvial induced delta front microfacies of sang groups of 5-6,ShaⅡ member,Yong 3-1 fault block,Yonganzhen oilfield

作　　者：束宁凯 

机构地区：[1]中国石油大学(华东)地球科学与技术学院,山东青岛266580

出　　处：《油气地质与采收率》2014年第2期84-86,116-117,共3页Petroleum Geology and Recovery Efficiency

摘　　要：明确三角洲前缘河口坝和水下分流河道的组合关系及发育模式对河控三角洲前缘砂体内部剩余油分布规律研究至关重要。以现代三角洲研究和沉积模式为指导,利用永安镇油田永3-1断块区岩心、录井、测井、生产动态资料,系统分析了研究区沙二段5—6砂层组河控三角洲沉积特征和沉积模式,根据各井所处位置不同和测井曲线形态差异,将三角洲前缘水下分流河道与河口坝垂向沉积模式划分为单一水下分流河道、上河下坝、上坝下河、孤立式河口坝和叠加式河口坝5种类型。在此基础上,以沉积模式为指导,对研究区沙二段5砂层组2小层进行了精细沉积微相构成研究,结果表明,研究区东部主要发育单一水下分流河道沉积,中部以上河下坝为主,西部为河口坝发育区。The front sand of fluvial induced delta front is the most active deposition in the delta facies,and also one of the most impor-tant reservoirs in our terrestrial basin.The distributary channel and mouth bar in the delta front interact each other,and its evolutionmay be classified into three stages.The planar evolution may result in the vertical depositional differences,and according to the depositional difference,location and well logging curves,the vertical depositional in the delta front may be divided into 5 types: the single dis-tributary channel,upper distributary bar,upper bar distributary channel,isolated bar and superimposed bar.Based on the guidance ofmodern delta study and depositional mode,the delta front sand in Sha Ⅱ member of Yonganzhen oilfield is analyzed thoroughly to ascer-tain the combination relationship of distributary channel and mouth bar,as well as the planar distribution.

关 键 词：河控三角洲前缘 沉积模式 水下分流河道 河口坝 永安镇油田 

分 类 号：TE111.3[石油与天然气工程—油气勘探]