博孜大北气田气井井筒结垢规律与阻垢剂优选研究  

Study on wellbore scaling law and optimization of scale inhibitor in Bozi-Dabei gas field

作　　者：郭东红[1,2] 李隽 杨晓鹏[1,2] 张义 刘岩 吴秋伯[1,2] GUO Dong-hong;LI Jun;YANG Xiao-peng;ZHANG Yi;LIU Yan;WU Qiu-bo(Department of Oil&Gas Production Engineering,Research Institute of Petroleum Exploration&Development,PetroChina,Beijing 100083,China;Key Laboratory of Oil&Gas Production,CNPC,Beijing 100083,China)

机构地区：[1]中国石油勘探开发研究院采油采气工程研究所,北京100083 [2]中国石油集团采油采气重点实验室,北京100083

出　　处：《精细与专用化学品》2022年第10期1-4,共4页Fine and Specialty Chemicals

基　　金：中国石油勘探与生产分公司资助项目(kt2020-21-01-02)。

摘　　要：塔里木油田博孜-大北气区气井井筒普遍存在结垢现象,通过气井水质分析,初步预测井筒结垢的主要成分是碳酸钙沉积物。为深入认识井筒结垢机理,开展了气井井筒结垢规律及其影响因素的研究。结果表明,随着温度以及pH值的升高,碳酸钙的结垢量增大;随着压力的升高,碳酸钙的结垢量减少。针对优选出的阻垢剂GY-405,开展了阻垢率影响因素的研究。结果表明,随着阻垢剂浓度、温度以及pH值的升高,阻垢率增大,但阻垢剂浓度、温度以及pH值分别存在一个最佳值;随着压力的升高,阻垢率增大。该研究结果对于博孜大北气田现场清垢、防垢具有重要的指导意义。The scaling phenomenon was widespread in the gas wells in Bozi-Dabei gas area of Tarim Oilfield.By analyzing the water quality of gas wells,it was preliminarily predicted that the main component of scaling in the wellbore was calcium carbonate sediment.In order to deeply understand the mechanism of wellbore scaling,the law of wellbore scaling and its influencing factors in gas wells were studied.The results showed that with the increase of temperature and pH value,the scaling amount of calcium carbonate increased,and with the increase of pressure,the scaling amount of calcium carbonate decreased.Aiming at the optimized scale inhibitor GY-405,the influencing factors of scale inhibition rate were studied.The results showed that the scale inhibition rate increased with the increase of scale inhibitor concentration,temperature and pH value,but there was an optimum value for scale inhibitor concentration,temperature and pH value respectively,and with the increase of pressure,the scale inhibition rate increased.The research results had important guiding significance for scale removal and scale prevention in Bozi-Dabei gas field.

关 键 词：博孜大北气田 井筒结垢 阻垢剂 阻垢率 

分 类 号：TE37[石油与天然气工程—油气田开发工程]