3种压裂液性能评价及其储层损害原因分析  

Performance evaluation of 3 fracturing fluids and the analysis of the formation damage caused by 3 fracturing fluids

作　　者：曹广胜[1] 李迎新[1] 赵明彪 张春辉[1] 朱磊[1] 

机构地区：[1]大庆石油学院提高油气采收率教育部重点实验室,黑龙江大庆163318 [2]大庆商城集团公司,黑龙江大庆163000

出　　处：《大庆石油学院学报》2006年第6期34-36,共3页Journal of Daqing Petroleum Institute

摘　　要：通过室内实验,测定了大庆油田3种压裂液的残渣质量浓度,评价了压裂液与葡萄花油田地层水的相容性.根据模拟压裂过程中压裂液与地层的作用机理,测定了压裂液反排率及对岩样渗透率的影响程度,找出了压裂液对油层污染的原因,可为改善压裂液的性能提供重要依据.实验结果表明:田菁胶、香豆胶和瓜胶3种压裂液残渣质量浓度均较大,是造成压裂低效的主要原因;压裂液与地层水相容性差,产生CaCO3等沉淀物质,堵塞地层孔隙和裂缝,使油层渗透率和裂缝导流能力下降,压裂效果变差;目前的3种压裂液对葡萄花油层污染均较为严重,田菁胶、香豆胶、瓜胶压裂液对岩心渗透率损害率分别为27.89%,18.51%,26.06%.Based on experiments,the mass concentrations of 3 fracturing fluids were determined,and the compatibility of these fracturing fluids with the formation water of Putaohua reservoir was evaluated.By simulating the interaction mechanism between fracturing fluid and formation,the recovery and the decrease degree of permeability of core sample were determined,and the main reason why the fracturing fluid contaminated formation was discovered,which could provide an important basis for improving the performance of fracturing fluid.The result of experiments showed that the mass concentrations of sesbania gum,fenugreek gum and guar gum were all high,and that was the main reason leading to the poor effect of fracturing.Because of bad compatibility of these fracturing fluids with the formation water,(CaCO_3) was produced and pore and fracture in formation was plugged,which would decrease permeability and fracture conductivity,resulting in poor fracturing.These 3 kinds of fracturing fluids may seriously contaminate Putaohua reservoir.The damage rate of sesbania gum,fenugreek gum and guar gum were 27.89%,18.51%,26.06% respectively.

关 键 词：压裂液 性能评价 储层损害 大庆油田 葡萄花储层 

分 类 号：TE357.1[石油与天然气工程—油气田开发工程]