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聚合物驱后油层优势渗流通道识别与治理-大庆石油地质与开发.PDF

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  2017年8月             大庆石油地质与开发 Aug , 2017                     第 36 卷第 4 期 Petroleum Geology and Oilfield Development in Daqing              Vol36 No4 DOI: 1019597/ JISSN1000⁃3754201705047 聚合物驱后油层优势渗流通道识别与治理 禹  影 (大庆油田有限责任公司第二采油厂, 黑龙江 大庆  163453) 摘要:聚驱后油层剩余油分布高度零散, 空间上中低水洗部位与优势渗流通道交互分布, 开采难度大, 经济效益 差。 如何识别和治理优势渗流通道是目前聚驱后油层开发中急需解决的问题。 以大庆油田萨南开发区一类油层 某区块为例, 通过定义有效渗透率、 含油饱和度界限, 结合动态资料识别并验证优势渗流通道, 描述其动态特 征, 与大庆长垣油田其他开发区聚驱后油层优势渗流通道发育特征基本一致。 根据优势渗流通道的发育及动态 特征的差异性, 明确调整方向, 采取黏度优化、 分层、 堵水、 调剖等治理方法, 取得了较好现场应用效果, 为 聚驱后油层优势渗流通道的识别与治理提供了依据。 关 键 词:聚驱后油层; 优势渗流通道; 识别; 治理 + 中图分类号: TE35746 1      文献标识码: A      文章编号: 1000⁃3754 (2017) 04⁃0101⁃05 IDENTIFICATION AND CONTROL OF THE PREFERENTIAL SEEPAGE CHANNELS FOR THE OIL RESERVOIRS AFTER THE POLYMER FLOODING YU Ying (No2 Oil Production Plant of Daqing Oilfield Co Ltd.,Daqing 163453,China) Abstract: After the polymer flooding,the remained oil in the reservoirs is extremely dispersed,the water flooded parts in the medium and lower waterflooded positions are alternately distributedwith the preferential seepage chan⁃ nels,so the production difficulty israther bigger andthe economicbenefit issopoorer. How to identify and control the preferential seepagechannelsistheissuetobe solvedurgently inthepresentpolymerfloodedreservoirs.Taking a certain block of the first⁃type reservoir in Sanan Developing Area of Daqing Oilfield as an example,by means of defining the boundary values of the effective permeability and oil saturation,integratedwith the dynamic data,the preferential seepage channels were identified and verified. And moreover the dynamic charac
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