水驱微观渗流特征及剩余油启动机理  

WATERFLOODING MICROSCOPIC FLOW CHARACTERISTICS AND THE REMAINED OIL STARTING MECHNISMS

作　　者：贾忠伟[1] 袁敏[1] 张鑫璐[2] 窦建洋 杨清彦[1] JIA Zhongwei;YUAN Min;ZHANG Xinlu;DONG Jianyang;YANG Qingyan(Exploration and Development Research Institute ofDaqing Oilfield Co Ltd. , Daqing 163712, China;College of Geosciences, China University of Petroleum, Beijing 102249, China;No. 1 Oil Production Plant of Daqing Oilfield Co. Ltd. , Daqing 163001, China)

机构地区：[1]大庆油田有限责任公司勘探开发研究院,黑龙江大庆163712 [2]中国石油大学(北京)地球科学学院,北京102249 [3]大庆油田有限责任公司第一采油厂,黑龙江大庆163001

出　　处：《大庆石油地质与开发》2018年第1期65-70,共6页Petroleum Geology & Oilfield Development in Daqing

基　　金：国家科技重大专项"精细注采结构优化调整技术"(2016ZX05010002-001);中石油股份公司科技重大专项"特高含水后期水驱高效精准挖潜技术研究与规模应用"(2016E-02-05)

摘　　要：通过微观驱油实验、岩心驱油实验及渗流理论分析,明确了水驱微观渗流规律,量化了水驱后微观剩余油分布特征,提出了改善水驱效果及提高采收率方法机理。水驱后剩余油启动需要克服启动压力,按照驱油机理划分,水驱后剩余油可划分为受黏附力控制的剩余油和受毛管力、黏滞力控制的剩余油2种类型,其中受毛管力和黏滞力控制的剩余油占90%以上。通过增加驱替压力梯度、降低界面张力启动和增加驱替体系黏度可以提高油层采收率。Through the microscopic oil displacing experiment,core oil displacing experiment and the seepage theory analysis,the microscopic seepage laws of the water flooding were clarified,the distribution characteristics of the microscopic remained oil after water flooded were quantified,and the mechanisms of improving the water flooded effects and enhancing the recovery ratio were proposed. The start-up pressure of the remained oil after water driven should be overcome,according to the mechanisms of the oil displacement,the remained oil after the water drive can be divided into two types： the remained oil controlled by the adhesion force and the oil dominated by the capillary force and viscous force,and moreover the latter is more than 90%. By increasing the displacing pressure gradient,reducing the interfacial tension and increasing the viscosity of displacing system can enhance the recovery factor of the oil reservoir.

关 键 词：水驱油 剩余油 微观 渗流特征 机理 

分 类 号：TE312[石油与天然气工程—油气田开发工程]