大庆石油地质与开发2018，Vol.37Issue(3)：114-119,6.DOI:10.19597/J.ISSN.1000-3754.201706012
2清洁压裂液返排液驱油体系性能评价及矿场应用
PERFORMANCE EVALUATION AND FIELD APPLICATION OF THE FLOWBACK-FLUID OIL DISPLACING SYSTEM OF CLEAN FRACTURING FLUID
摘要
Abstract
In order to realize the reuse of the flowback liquid system of the clean fracturing fluid,the indoor research was conducted for a new kind of nano composite clean fracturing fluid system,the interfacial activity,wettability,emulsifying and adsorbing performances of the flowback fluid regarding as the oil displacing system were evaluated.On this basis,the oil recovery was studied to enhance for the system of the low-permeability-reservoir core after the water flooding.The results show that the interfacial tension between the system and the degassed crude oil can reach the order of 10-3mN/m under the conditions of 0.08％ and 60 ℃ temperature mass fraction of the oil displacement system,the viscosity reduced rate of the heavy oil can be more than 95％,and moreover the emulsifying property is much better;The oil displacing system can change the wettability of the rock surface from hydrophilic to neutral;The final retention of the surfactant in the flooding system is 2.8 mg/g in the core and the retention of the nano-particles is 8.8 mg/g.The simulation results of the core oil-flooding experiment show that the oil displacement system can make the saturated degassed crude oil recovery of the low-permeability core increased by 17.26％ after the water flooding,i.e.much better oil-flooded effects are achieved.The results of the field test show that the effects of increasing the oil are remarkable.关键词
清洁压裂液/返排液/黏度/界面张力/驱油效果/矿场试验Key words
clean fracturing fluid/flowback fluid/viscosity/interfacial tension/oil displaced effect/field test分类
能源科技引用本文复制引用
付文耀,冯松林,韦文,王博,许定达,苏煜彬..2清洁压裂液返排液驱油体系性能评价及矿场应用[J].大庆石油地质与开发,2018,37(3):114-119,6.基金项目
中石油科技创新基金项目“致密油体积压裂缝网与基质耦合流动机理研究”(2015D-5006-0208). （2015D-5006-0208）
