应用幂律和改良幂律模型研究干法泡沫压裂液流变性  

Study on the rheology of dry foam fracturing fluid using power-law (PL) model and modified power-law (PL) model

作　　者：孙晓[1] 王树众[1] 白玉[1] 陆友莲[1] 宋振云[2] 李志航[2] 

机构地区：[1]西安交通大学动力工程多相流国家重点实验室,陕西西安710049 [2]长庆石油勘探局工程技术研究院,陕西西安710021

出　　处：《西安石油大学学报（自然科学版）》2009年第2期60-63,66,共5页Journal of Xi’an Shiyou University（Natural Science Edition）

基　　金：国家自然科学基金资助项目(编号:90610021)

摘　　要：为了正确认识压裂液的流变特性,模拟高压高剪切速率实际压裂施工条件下,在大型高压泡沫压裂液实验回路上对改良的干法压裂液的流变特性进行实验研究,并用幂律模型和改良幂律模型对实验数据进行了处理.结果表明:当剪切速率和温度升高时,改良的干法压裂液流动变顺畅;当压力和泡沫质量增加时,其流动性变差.改良幂律模型中引入的比容膨胀率能包含温度造成的体积膨胀影响,但不能包含泡沫质量的影响,因为当泡沫质量高于70%时,泡沫质量增加带来的泡沫结构的变化没有考虑在比容膨胀率中.The rheology of modified foam fracturing fluid is studied on a large-scale experimental loop system.This experimental loop system simulates the practical fracturing operation condition of high-pressure and high-shearing rate.The experimental data is processed using PL model and modified PL model.The results show that the flowability of the modified foam fracturing fluid becomes better with the increase of temperature and shearing rate,and it becomes worse with the increase of pressure and mass fraction of foam.The specific volume expansion rate introduced in modified PL model can reflect the volume expansion caused by the change of temperature,but not reflect the effect of the mass fraction of foam,because the change of the foam structure caused by the increase of foam mass fraction can not be considered in the specific volume expansion rate when the mass fraction of foam is higher than 70%.

关 键 词：泡沫压裂液 流变特性 改良幂律模型 比容膨胀率 

分 类 号：TE357.29[石油与天然气工程—油气田开发工程]