一种带压作业化学封堵材料的制备与评价  

Synthesis and Evaluation of a Chemical Sealing Material for Snubbing Operation

作　　者：潘元 程立[1] 廖锐全[1] 李振 张康卫 袁龙 PAN Yuan;CHENG Li;LIAO Ruiquan;LI Zhen;ZHANG Kangwei;YUAN Long(The Branch of Key Laboratory of CNPC for Oil and Gas Production,College of Petroleum Engineering,Yangtze University,Wuhan,Hubei 430100,P R of China;School of Urban Construction,Yangtze University,Jingzhou,Hubei 434023,P R of China;Downhole Operation Company,DagangOilfield Company,PetroChina,Tianjin 300280,P R of China)

机构地区：[1]长江大学中石油采油采气重点实验室,湖北武汉430100 [2]长江大学城市建设学院,湖北荆州434023 [3]中国石油大港油田公司井下作业公司,天津300280

出　　处：《油田化学》2019年第4期582-586,593,共6页Oilfield Chemistry

基　　金：中国石油科技创新基金项目“不压井作业冻胶阀新材料的设计合成与性能评价”（项目编号2014D-5006-0309）

摘　　要：为满足日益严峻的不压井(带压)作业对冻胶材料的要求,实验室采用聚丙烯酰胺(HPAM)、交联剂Smel30、淀粉和促凝剂氯化铵为原料制备了一种适用性广、性能优良的带压作业封堵材料,研究了促凝剂、温度、pH值、金属离子和模拟油对该凝胶体系成胶性能的影响,同时考察了凝胶的长期稳定性和破胶性能.研究结果表明,基础配方为3%淀粉+0.5%交联剂Sme130+0.8%氯化铵+1%HPAM的凝胶体系的最佳使用pH范围为5~9,尤其适用于弱碱性油藏;金属离子对其成胶时间和凝胶强度影响较小;通过调节促凝剂加量可以控制凝胶成胶时间在6~20h,且凝胶强度可达到J级;实验室条件下采用过硫酸铵破胶剂2h内可实现有效破胶,破胶后胶液的黏度降至300 mPa·s,便于返排.In order to meet the increasingly severe snubbing operation environment,a kind of plugging material with wide applicability and excellent performance was prepared by using polyacrylamide(HPAM),cross-linking agent Smel 30,corn starch and ammonium chloride as raw materials in the laboratory.The effects of coagulant,temperature,pH value,metal ions and simulated oil on the gelling properties of the system were studied by rheological method.In addition,the stability and breakability of the gel was evaluated.The experimental results showed that the optimal pH range of the gel system,composed of 3%corn starch,0.5%cross-linking agent Smel 30,0.8%ammonium chloride and 1%HPAM,was 5—9,which is especially suitable for weakly alkaline reservoirs;metal ions had little effect on gelation time and gel strength.The gelation time of the gel could be controlled at the range of 6—20 h by adjusting the amount of coagulant,and the gel strength of the obtained gel could reach J level.Under the laboratory conditions,the gel could be effectively broken with ammonium persulfate within 2 h.The viscosity of the gel-breaking fluid reduced to 300 mPa·s,indicating the gel was easy for flowback.

关 键 词：带压作业 封堵 凝胶 室内评价 

分 类 号：TE39[石油与天然气工程—油气田开发工程]