胍胶压裂液用高效杀菌剂研究及现场应用  

Research and Application of High-efficiency Bactericide for Guar Gum Fracturing Fluid

作　　者：常青 邹春凤 蔡景超 王越 张秋红 李风光 杨超 CHANG Qing;ZOU Chunfeng;CAI Jingchao;WANG Yue;ZHANG Qiuhong;LI Fengguang;YANG Chao(Engineer Technology Research Institute,BHDC,Tianjin 300280;Downhole Technology Service Company,BHDC,Tianjin 300280;Science and Technology Information Department,CPTEC,Beijing 100007)

机构地区：[1]中国石油集团渤海钻探工程技术研究院,天津300280 [2]中国石油集团渤海钻探井下技术服务分公司,天津300280 [3]中国石油集团油田技术服务有限公司科技信息部,北京100007

出　　处：《钻井液与完井液》2023年第4期535-539,共5页Drilling Fluid & Completion Fluid

基　　金：中国石油集团渤海钻探工程有限公司重大研发项目“大庆页岩油缝网精细压裂技术研究”(2021ZD42Y)。

摘　　要：夏季压裂施工过程中存在胍胶压裂液受细菌等微生物滋生影响而腐化变质的问题,利用微生物多样性测序技术对大庆、内蒙和四川区域储液罐中胍胶压裂液的细菌菌种进行了分析,针对微生物类型研制了季铵盐复合聚赖氨酸类高效杀菌剂,通过平板计数法评价了其对胍胶压裂液的杀菌效果。室内实验结果表明:新研制的复合型杀菌剂可在2 h内使得细菌的致死率达到100%。现场胍胶压裂液添加该杀菌剂后储存3 d后体系的黏度保持率仍达90%。现场应用8口井共计352段,胍胶类压裂液体系使用该杀菌剂后未再出现腐败变质,证实了该新型杀菌剂具有高效杀菌效果。In response to the problem of guar gum fracturing fluid being affected by bacteria and other microorganisms during the summer in Daqing area,which leads to deterioration,and hydration,and affects the success rate of construction,the microbial diversity sequencing technology was used to analyze the bacterial species of guar gum fracturing fluid in three reservoir tanks constructed at the same time in different blocks,and the Quaternary ammonium cation composite polylysine high-efficiency bactericide was developed.The bactericidal effect of the new compound bactericide on fracturing fluid in Daqing area was evaluated by plate counting method.The experimental results showed that the newly developed compound bactericide could make the sterilizing rate reach 100%in 2h.A total of 352 sections were applied in 8 wells on site,and the viscosity retention rate of guar gum fracturing fluid was still 90%after 72 hours.This bactericide effectively solves the technical problem of rapid deterioration of on-site guar gum fracturing fluids,providing important performance guarantee for smooth fracturing construction,and has important application prospects in plant gum fracturing fluids.

关 键 词：菌种分析 扩增子测序 季铵盐 聚赖氨酸 复合杀菌剂 

分 类 号：TE357.12[石油与天然气工程—油气田开发工程]