摘要
针对现场使用羟丙基瓜胶压裂液杀菌剂易出现腐败变质过快,影响现场压裂施工的现象,将企业产品标准评价条件与现场实际的对比,认为以下3个方面是引起腐败变质过快的主要原因:标准评价方法中,菌类来源未考虑来自罐体的菌类;碱性交联的羟丙基瓜胶用杀菌剂pH值应不小于7为宜,同时应考虑pH值0.1以上的变化引起的瓜胶原液黏度变化,杀菌剂的效果应优于羟丙基瓜胶压裂液pH值交联调节剂的效果;黏度保持率应结合不同浓度羟丙基瓜胶黏度值大小及交联携砂性来确定。
Bactericides used in hydroxyl propyl guar gum （HPGG） fracturing fuids are inclined to become decayed quickly, hence hindered well fracturing. In laboratory studies the conditions under which the bactericides were evaluated and the feld conditions compared.Three factors were found affecting the decaying process of the bactericides.First, the bacteria used in standard evaluation process do not take into account those from fuid tanks. Second, the pH values of the bactericides used in HPGG （produced through alkaline crosslinking） fracturing fuids should not be less than 7. Consideration should be given to the changes in pH values by greater than 0.1 which will cause changes in the viscosity of the guar gum liquid, and the effectiveness of bactericides should be superior to that of pH value crosslinking modifers used in HPGG fracturing fuids. Third, percent viscosity retention should be determined on the basis of the viscosities of HPGG of different concentrations and sand carrying capacity through crosslinking performance.
出处
《钻井液与完井液》
CAS
北大核心
2017年第5期91-95,共5页
Drilling Fluid & Completion Fluid
基金
中石油集团公司"新疆大庆"重大科技专项"试油及储层改造关键技术研究"(2012E-31-14)
关键词
羟丙基瓜胶
杀菌剂
评价指标
有效性
关键因素
Hydroxyl propyl guar gum
Bactericide
Evaluation indicator
Effectiveness
Key factor
