韦5断块三角洲前缘储层构型及剩余油分布  

Delta Front Reservoir Architectural Characteristics and Its Relations with Remained Oil Distribution in Wei-5 Fault Block,Gaoyou Sag,Subei Basin

作　　者：袁静[1] 梁绘媛 宋璠 唐湘明[3] 董道涛 

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 [2]中国石化胜利油田分公司,山东东营257062 [3]中国石化江苏油田分公司,江苏扬州225012

出　　处：《西南石油大学学报（自然科学版）》2015年第6期1-11,共11页Journal of Southwest Petroleum University(Science & Technology Edition)

基　　金：中国石化科技攻关项目(P13125)

摘　　要：高邮凹陷韦5断块阜一段一砂组三角洲前缘储层剩余油潜力大,但分布规律不明。针对该问题开展了对三角洲前缘砂体构型特征及其与剩余油分布关系的研究。研究中充分利用岩芯、测井和动态监测等信息,取得如下认识:在识别出的六级构型界面中,四级界面是层内剩余油分布的主要控制界面;以四级界面为界,识别出8种成因砂体构型单元;构型单元内部砂体韵律与构型单元之间的渗流差异控制剩余油分布。研究区内剩余油富集区可划分为边缘型和孤立型两种,前者主要位于分流河道末梢或边缘、河口坝侧缘,以及与主力构型邻接的天然堤、席状砂和远砂坝;后者主要位于不与水下分流河道连通的透镜状河口坝、远砂坝等。The remaining oil potential is great in the delta front in the first sand group of the 1-（st） Member of Funing Formation of the Wei-5 fault block,but the distribution of the remaining oil is not clear.With such data as the core,well logging,dynamic monitoring,the architectural characteristics of the delta front sand body and its relations with the distribution of remaining oil were studied.The results show that among the six recognized orders of bounding surface,the forth order bounding surfaces is crucial to the distribution of remained oil within the layer.Eight facies architectural elements,bounded by the fourth order bounding surface,are identified.Studies found that the configuration of single architectural element and seepage flow differences between elements control the remaining oil distribution.Areas with rich remaining oil can be divided into rim area and isolated area.Rim areas are mainly distributary channel endings or lateral margin edge,mouth bar lateral margin,and natural levee,sand sheet and distal bars.Isolated areas enriched with remaining oil are mainly lenticular sand bodies,such as mouth bar and distal bar,which is not connected with the underwater distributary channel.

关 键 词：储层构型 三角洲前缘 剩余油 阜一段 高邮凹陷 

分 类 号：TE122[石油与天然气工程—油气勘探]