石油钻采工艺2017，Vol.39Issue(4)：399-404,6.DOI:10.13639/j.odpt.2017.04.002
致密油藏热水驱增油机理定性分析及定量评价
Qualitative analysis and quantitative evaluation on the stimulation mechanisms of hot water flooding in tight oil reservoirs
杨树坤 1张博 1赵广渊 1李翔 1郭宏峰1
作者信息
摘要
Abstract
To enhance the recovery factor of tight oil reservoirs, the target block was selected. Then, based on the core and crude oil data collected in the field, the stimulation mechanisms of hot water flooding considering variable threshold pressure were investigated by means of laboratory experiment. And finally, all stimulation mechanisms of hot water flooding were quantitatively evaluated by using the numerical simulation method. The laboratory experiment results show that thermal expansion, threshold pressure decline, thermal viscosity reduction, interfacial tension decrease and relative permeability curve improvement are the oil displacement mechanisms of hot water flooding in tight oil reservoirs, and thermal expansion and threshold pressure decline are the main stimulation mechanisms. Nu-merical simulation results indicate that the contribution ratios of thermal expansion and threshold pressure decline are the highest when hot water flooding is carried out at 100 ℃ and 150 ℃. The contribution ratio of thermal expansion is 29.79％ and 33.28％, respectively, and that of threshold pressure decline is 31.66％ and 30.48％, respectively. Relative permeability improvement and thermal viscosity reduction take the second place, and the contribution ratio of interfacial tension decrease is the lowest (7.08％ and 6.27％, respectively). Obviously, the correctness of experimental results is verified further by the simulation results.关键词
致密油藏/热水驱/增油机理/室内实验/数值模拟Key words
tight oil reservoir/hot water flooding/stimulation mechanism/laboratory experiment/numerical simulation分类
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杨树坤,张博,赵广渊,李翔,郭宏峰..致密油藏热水驱增油机理定性分析及定量评价[J].石油钻采工艺,2017,39(4):399-404,6.
