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基于瞬时流场潜力系数的水驱开发效果评价方法
冯其红,李闪闪,黄迎松,张先敏,刘海成,刘丽杰
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(1.中国石油大学(华东)石油工程学院,山东青岛266580;2.中国石化胜利油田分公司勘探开发研究院,山东东营257015)
摘要:
目前常用的水驱开发效果评价指标多根据油藏基本生产数据构建,评价过程较为繁琐,无法直接表征地下流场的驱替变化特征。因此,针对水驱油藏地下流场分布特征,通过提取流线空间位置坐标及流线上油水相流动速率、饱和度分布的属性数据,构建表征水驱油能力的流场潜力系数,进而提出了基于瞬时流场潜力系数的水驱开发效果评价方法。以孤岛油田西区北Ng3-4单元为例,进行油藏流场调整后的水驱开发效果评价,分析结果表明:瞬时流场潜力系数与实际累积产油量之间呈正相关,与借助于油藏工程或数值模拟计算的评价方法相比,新建立的水驱开发效果评价方法仅采用瞬时流场潜力系数来直接表征地下流场水驱油潜力,摆脱了评价指标计算的时间依赖性,实现了水驱油藏长期开发效果的快速、定量评价,在大规模水驱油藏开发效果评价中的实际应用意义重大。
关键词:  特高含水期  流场调整  流线  流场潜力系数  开发效果评价
DOI:10.13673/j.cnki.cn37-1359/te.2020.04.009
基金项目:国家科技重大专项“特高含水后期整装油田延长经济寿命期开发技术”(2016ZX05011-001)
Evaluation method of water flooding development effect based on instantaneous flow field potential coefficient
FENG Qihong,LI Shanshan,HUANG Yingsong,ZHANG Xianmin,LIU Haicheng,LIU Lijie
(1.School of Petroleum Engineering,China University of Petroleum(East China),Qingdao City,Shandong Province,266580,China;2.Exploration and Development Research Institute,Shengli Oilfield Company,SINOPEC,Dongying City,Shandong Province,257015,China)
Abstract:
At present,the commonly used evaluation indicators of water flooding development effects are mostly constructed based on the basic production data of the reservoir,and the evaluation process is relatively cumbersome,and it cannot directly characterize the displacement change characteristics of the underground flow field. Therefore,in view of the distribution characteristics of the subsurface flow field in water flooding reservoirs,by extracting the attribute data of the spatial position coordinates of the streamline and the flow rate and saturation distribution of oil and water phases on the streamline,a flow field potential coefficient characterizing the water flooding capacity is constructed. Furthermore,an evaluation method of water flooding development effect based on the instantaneous flow field potential coefficient is proposed. Taking the north Ng3-4 unit in the west area of Gudao Oilfield as an example,the evaluation of the water flooding development effect after the adjustment of the reservoir flow field was conducted. The analysis results show that there is a positive correlation between the instantaneous flow field potential coefficient and the actual cumulative oil production indicators. Compared with the evaluation methods by means of reservoir engineering or numerical simulation calculation,the newly established evaluation method of water flooding development effect only uses the instantaneous flow field potential coefficient to directly characterize the water flooding potential of the underground flow field,which gets rid of the time dependence of the evaluation index calculation,and realizes the rapid and quantitative evaluation of the long-term development effect of water flooding reservoirs. The practical application in the evaluation of large-scale water flooding reservoir development effects is of great significance.
Key words:  extra-high water cut period  flow field adjustment  streamline  flow field potential coefficient  development ef⁃ fect evaluation

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