复杂断块油藏注水体积波及系数与驱替程度变化规律研究  

Volume Swept Efficiency and Displacement Variation in Complicated Fault-block Pool

作　　者：孟立新[1] 成洪文[1] 高淑芳[1] 林华英[2] 梁伯勋[1] 徐世银[1] 

机构地区：[1]中国石油大港油田勘探开发研究院,天津300280 [2]川庆钻探工程有限公司地质勘探开发研究院,四川成都610051

出　　处：《天然气地球科学》2010年第4期638-641,共4页Natural Gas Geoscience

摘　　要：对于注水开发油田而言,体积波及系数和驱替程度是重要的评价参数。以渤海湾盆地黄骅坳陷港东一区一断块明三油组和枣南孔一段枣1281断块为研究对象,采用油藏数值模拟研究、油藏工程计算和注采井网分析等方法,定量分析了研究区块注水体积波及系数与驱油效率及其在开发过程中的变化规律。指出在油田开发初期注水体积波及系数增长迅速,在开发后期增长缓慢,到高含水阶段后,宏观注水波及系数提高幅度不大,但水洗强度增加,使强水洗段厚度比例和驱油效率增大。认为需通过提高波及范围内的整体驱替程度来提高水驱采收率。该项研究对老油田开发后期调整具有一定的参考作用。For the water-flood oil pool,the volume sweep efficiency and displacement degree of reserve recovery are two important parameters.In this paper,the fault blocks of Gangdong 1 Q1 and Zao 1281 in the Huanghua depression of the Bohai bay basin as a case was studied by means of numerical simulation,reservoir engineering calculation,and injection-production well net.We quantitatively study the volume sweep efficiency,displacement efficiency as well as their variation in the development process.During the process of oilfield development,the swept volume efficiency rapidly increases at the early stage and decrease at the late stage.At the high water stage,the swept volume efficiency is almost constant,but the intensity of water washing increases to make the increase of water washing thickness ratio and the oil displacement efficiency.Thus,it is required to raise the scope of the whole displacement to improve water flooding recovery.The result will be useful to adjust the development proposal of mature oil field.

关 键 词：复杂断块油藏 体积波及系数 驱油效率 驱替程度 

分 类 号：TE319[石油与天然气工程—油气田开发工程]