酸化返排液中无机离子对电导率的影响  

Effects of inorganic ions in acidified effluent on electrical conductivity

作　　者：刘洋[1] 胡红福[1] 王春林[1] 荣新明[1] 黄志明 LIU Yang;HU Hongfu;WANG Chunlin;RONG Xinming;HUANG Zhiming(Production Optimization Department of China Oilfield Services Limited,Tianjin 300459,China)

机构地区：[1]中海油田服务股份有限公司油田生产事业部,天津300459

出　　处：《精细石油化工进展》2021年第5期56-58,共3页Advances in Fine Petrochemicals

摘　　要：酸化是油田增产增注的重要措施之一,但酸化返排液的电导率过高会引起流程中电脱水装置跳闸。本文研究渤海油田4口油井酸化后返排液中离子种类、含量及高价金属离子对返排液电导率的影响,结果表明:返排液中所含无机离子的种类基本一致;返排液中的离子总含量越高,其相应电导率越大;随着Ca^(2+)、Mg^(2+)和Fe^(3+)这3种特征离子浓度的增加,返排液的电导率逐渐增加,当离子质量浓度为1 000 mg/L时,3种返排液的电导率分别为57.8、59.7和55.4 mS/cm;特别地,Fe^(3+)对前期返排液电导率的提升能力约为同浓度下Ca^(2+)、Mg^(2+)的2~3倍。Acidification is one of the important measures to increase production and injection in oilfields,but the excessively high conductivity of the flowback fluid after acidification will cause the problem of tripping of the electric dehydrator in the process. This paper studied the effects of ion species,content and high-valent metal ions in the flowback fluid on the conductivity of the flowback fluid after acidification in four oil wells of Bohai Oilfield. Results showed that the types of inorganic ions contained in the flowback liquid were basically the same. As the total content of ions in the flowback fluid was high,in which the corresponding conductivity was greater. As the concentration of the three characteristic ions of Ca^(2+),Mg^(2+),Fe^(3+)increased,the conductivity of the flowback liquid gradually increased. When the ion concentration was 1 000 mg/L,the conductivity of the three flowback liquids were 57.8,55.4 and 59.7 mS/cm,respectively. In addition,Fe^(3+)could improve the conductivity of the flowback fluid in the early stage,about 2-3 times than that of Ca^(2+)and Mg^(2+)under the same concentration.

关 键 词：酸化返排液 无机离子 FE 电导率 高价金属离子 

分 类 号：TE357.2[石油与天然气工程—油气田开发工程]