The application of using EDTA to dissolve calcium sulphate deposits for plugged ESP wells in Rumaila oilfield

2nd International Symposium on Resource Exploration and Environmental Science

生态环境科学

Ren, Shuangshuang^1 ; Xu, Hao^2 ; Li, Meng^3 ; Wang, Yuxiong^2 ; Shen, Fei^1

Research Institute of Drilling and Production of Jidong Oilfield, China^1

China National Oil and Gas Exploration and Development Co. Ltd., China^2

CNOOC Research Institute Co. Ltd., China^3

关键词: Application effect;    Calcium sulphate;    Electric submersible pumps;    New pumps;    Pump failure;    Root cause;    Root cause failure analysis;    Workover rig;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/170/2/022081/pdf
DOI  :  10.1088/1755-1315/170/2/022081

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

In Rumaila oilfield, many electric submersible pumps (ESP) have been found plugged during commissioning shortly after the new pumps were installed. After these failed plugged pumps have been replaced through workover rigs, the new pumps still face the same problem. Based on the result of root cause failure analysis, this paper describes the potential root cause of pump failure, the solution to treat the plugged pump, the operation steps and application effects of using ethylenediaminetetraacetate acid (EDTA) to dissolve calcium sulphate (CaSO4) deposits for plugged ESP wells in Rumaila oilfield, providing references for solution of similar issue and application of this technology.