页岩气压裂返排液浓缩结晶实验研究  

Experimental Study on Concentrated Crystallization of Shale Gas Fracturing Flow Back Fluid

作　　者：李永胜[1] 王远[1] 温冬 肖泽仪[1] LI Yong-sheng;WANG Yuan;WEN Dong;XIAO Ze-yi(College of Chemical Engineering,Sichuan University,Sichuan Chengdu 610065,China)

机构地区：[1]四川大学化学工程学院,四川成都610065

出　　处：《广州化工》2018年第2期82-84,127,共4页GuangZhou Chemical Industry

基　　金：2013年国家科技支撑项目计划(编号:2013BAC12B01);四川大学德阳校市科技合作专项资金(编号:HZYF201513)

摘　　要：对四川长宁页岩气田压裂返排液进行水样分析,其具有含盐量高、成分复杂的特点。探究利用机械蒸汽再压缩技术处理压裂返排液,通过蒸发结晶分离水和盐。实验研究了两种压裂返排液的浓缩结晶特性:返排液介稳区宽度和过饱和度对浓缩结晶的影响。实验结果表明:返排液介稳区随温度升高而减小,但结晶速率随温度升高而增大。温度从60℃增加到80℃,结晶平均粒径增长了56%左右;返排液结晶的主要成分为氯化钠。Water quality analysis of shale gas field fractured flow-back fluids in Changning of Sichuan showed that it had the characteristics of high salt content and complicated composition.The mechanical vapor recompression technology was explored to deal with fracturing flow-back fluid,then water and salts were separated by evaporation crystallization.The concentration and crystallization properties of two kinds of fracturing flow-back liquids were studied,including the meta-stable zone width and the influence of supersaturation on the concentration and crystallization.The experimental results showed that the meta-stable zone decreased with the increase of temperature,while the crystallization rate increased.The average particle size increased by about 56%,when the temperature from 60℃to 80℃.Besides,the main component of flow-back fluids crystallization was sodium chloride.

关 键 词：压裂返排液 浓缩结晶 机械蒸汽再压缩蒸发 结晶速率 

分 类 号：TE992.2[石油与天然气工程—石油机械设备]