低渗油藏用CO_(2)泡沫压裂液的黏度影响因素分析  

Analysis of factors influencing the viscosity of CO_(2) foam fracturing fluid for low permeability reservoirs

作　　者：延小亮 李刚[1] 房葛 甄浩 刘号明 郝锦涛 易居安 李建勋[1] 张璐[1] YAN Xiaoiang;LI Gang;FANG Ge;ZHEN Hao;LIU Haoming;HAO Jintao;YI Ju’an;LI Jianxun;ZHANG(Xingzichuan Oil Production Plant,Yanchang Oilfield Co.,Ltd.,Yan’an 717400,Shaanxi,China)

机构地区：[1]延长油田股份有限公司杏子川采油厂,陕西延安717400

出　　处：《能源化工》2023年第4期58-62,共5页Energy Chemical Industry

基　　金：中石油重大开发实验项目(XJYT-2020-FW-51857)。

摘　　要：在高温高压(HTHP)、泡沫稳定剂存在的条件下制备了较稳定的CO_(2)泡沫,并考察了表面活性剂质量分数、盐度和剪切速率对CO_(2)泡沫黏度的影响,试验结果表明,表面活性剂质量分数和盐度对幂定律指数(K,n)的影响较大。流动稠度指数(K)与表面活性剂质量分数呈二次函数关系,流动行为指数(n)与表面活性剂质量分数呈线性关系。K和n均为盐度的二次函数。修正后的幂函数模型在表面活性剂质量分数为0.25%~1%、盐度为0.5%~8%、剪切速率为10~500 s-1的条件下均可适用,且试验值和预测值匹配度较高。Stable CO_(2) foam is prepared under the conditions of high temperature and high pressure(HTHP)and the presence of foam stabilizer.The effects of the mass fraction of surfactant,salinity and shear rate on the viscosity of CO_(2) foam are investigated.The results show that the mass fraction of surfactant and salinity have a significant impact on the power law index(K,n).The flow consistency index(K)shows a quadratic function relationship with the mass fraction of surfactant,while the flow behavior index(n)shows a linear relationship with the mass fraction of surfactant.K and n are quadratic functions of salinity.The revised power function model is applicable under the conditions of surfactant mass fraction of 0.25%~1%,salinity of 0.5%~8%,and shear rate of 10~500 s-1,and has a high matching degree between experimental and predicted values.

关 键 词：压裂液 泡沫黏度 表面活性剂 盐度 

分 类 号：TE357.12[石油与天然气工程—油气田开发工程]