摘要
目的针对页岩气井的泡沫排水稳产及细菌腐蚀的控制,研究出150℃井温下兼具泡沫排水及杀菌防腐功能的复合杀菌起泡剂。方法结合对泡沫生成到破灭变化过程的分析,通过对起泡主剂、稳泡助剂及杀菌助剂的优选,复配形成复合杀菌起泡剂并进行现场试验验证。结果在温度为90℃、复合杀菌起泡剂的质量浓度为1.0 g/L时,起始泡高大于185 mm、5 min泡高大于122 mm、携液量大于149 mL/15 min;在压力为5 MPa、温度为150℃、复合杀菌起泡剂的质量浓度为2.0 g/L时,发泡体积大于650 mL、1000 s时泡沫体积降低率小于10%;复合杀菌起泡剂的质量浓度为1.0 g/L时,对SRB的杀菌率达100%;现场试验中,相同用量的常规起泡剂和复合杀菌起泡剂的气产量、水产量相当,未实施泡沫排水的井使用复合杀菌起泡剂后气产量、水产量稳定,杀菌率达98.0%以上。结论研制的复合杀菌起泡剂兼具泡沫排水及杀菌防腐功能,可用于井底温度为150℃页岩气井的泡沫排水稳产及杀菌防腐。
Objective In order to meet the needs of stable production of foam drainage and control of bacterial corrosion in shale gas wells,a compound bactericidal foaming agent with functions of foam drainage,bactericidal and antiseptic at 150℃well temperature was developed.Methods Combined with the analysis of foam formation to burst process,through the optimization of foaming agent,foam stabilizing agent and bactericidal agent,compound bactericidal foaming agent was formed and verified by field test.Results At 90℃and the mass concentration of 1.0 g/L,the initial bubble height was more than 185 mm,the 5 min bubble height was more than 122 mm,and the liquid carrying capacity was greater than 149 mL/15 min.At 5 MPa,150℃and the mass concentration of 2.0 g/L,the foaming volume was more than 650 mL,and the foam volume decreases less than 10%at 1000 s.The bactericidal rate of sulfate reducing bacteria(SRB)was 100%at the the mass concentration of 1.0 g/L.In the field application test,the gas yield and water yields of conventional foamer and compound bactericidal foamer with the same the mass concentration were equal,the gas yield and water yield of the wells without foam drainage were stable after using the compound bactericidal foaming agent,and the bactericidal rate was over 98.0%.Conclusions The compound bactericidal foaming agent has functions of foam drainage,bactericidal and antiseptic.It can be used for stable production and bactericidal antiseptic of foam drainage in 150℃shale gas well.
作者
蒋泽银
李小蓉
罗鑫
陈满
杜国佳
Jiang Zeyin;Li Xiaorong;Luo Xin;Chen Man;Du Guojia(Research Institute of Natural Gas Technology,PetroChina Southwest Oil&Gasfield Company,Chengdu,Sichuan,China;Sichuan Province Key Laboratory of Shale Gas Evaluation and Exploitation,Chengdu,Sichuan,China;PetroChina Southwest Oil&Gasfield Company,Chengdu,Sichuan,China;Sichuan Changning Gas Development Co.,Ltd.,Chengdu,Sichuan,China)
出处
《石油与天然气化工》
CAS
CSCD
北大核心
2023年第4期73-76,82,共5页
Chemical engineering of oil & gas
基金
中国石油天然气股份公司“深层页岩气有效开采关键技术攻关与试验”(2019F-31)
中国石油西南油气田公司科学研究与技术开发项目“长宁页岩气平台井泡排剂加注技术深化研究”(20210303-27)。
关键词
页岩气井
泡沫排水
起泡剂
杀菌剂
高温
高压
shale gas well
foam drainage
foaming agent
bactericide
high temperature
high pressure