石油勘探与开发2018，Vol.45Issue(2)：320-325,6.DOI:10.11698/PED.2018.02.15
滑溜水在页岩储集层的吸附伤害及控制措施
Adsorption damage and control measures of slick-water fracturing fluid in shale reservoirs
摘要
Abstract
The slick-water polymer adsorption damage and control measures in shale were examined using a shale pack model of the Ordovician Wufeng Formation-Silurian Longmaxi Formation in the Changning block of the Sichuan Basin.The adsorption law of slick water under different displacement time,concentrations,pH values and temperatures of polymer were tested by traditional displacement experiment and UV-Vis spectrophotometer.The adsorption equilibrium time was 150 min,the amount of adsorption was proportional to the concentration of the polymer,and the maximum adsorption concentration was 1 800 mg/L.With the increase of pH value,the adsorption capacity decreased gradually,the adsorption capacity increased first and then decreased with the increase of temperature,and the adsorption capacity was the largest at 45 ℃.The adsorption patterns of polymers on shale were described by scanning electron microscopy and magnetic resonance imaging.It is proved that the adsorption of polymer on shale led to the destruction of the network structure of anionic polyacrylamide molecules,and the shale adsorption conformation was characterized qualitatively.Finally,according to the adsorption law and adsorption mechanism,it is proposed to reduce the adsorption quantity of polymer on shale surface by using hydrogen bond destruction agent.The effects of hydrogen bond destruction on four kinds of strong electronegative small molecules were compared,the hydrogen bond destroyer c was the best,which lowered the adsorption capacity by 5.49 mg/g and recovered permeability to 73.2％.The research results provide a reference for the optimization of construction parameters and the improvement of slickwater liquid system.关键词
页岩/水力压裂/滑溜水/聚合物/页岩吸附/解吸附Key words
shale/hydraulic fracturing/slick-water/polymer/shale adsorption/desorption分类
能源科技引用本文复制引用
郭建春,李杨,王世彬..滑溜水在页岩储集层的吸附伤害及控制措施[J].石油勘探与开发,2018,45(2):320-325,6.基金项目
国家杰出青年科学基金项目(51525404) （51525404）
“十三五”国家科技重大专项(2016ZX05021,2016ZX05023) （2016ZX05021,2016ZX05023）
四川省杰出青年学术技术带头人资助计划(2016JQ0015) （2016JQ0015）
