摘要
针对改性瓜胶高温压裂液增稠剂使用质量分数高、破胶性能低、成本高的问题,制备了可与羟丙基瓜胶交联且使形成的压裂液体系具备良好性能的硼交联剂,得到了适用于深层致密油气藏的高温羟丙基瓜胶压裂液体系。对影响交联剂的主要因素进行了分析和优选,基于优选结果制备了络合硼交联剂,并对其交联形成的羟丙基瓜胶压裂液体系进行了综合性能评价。结果表明:硼酸质量分数20%,交联促进剂质量分数7%,多元醇混合物质量分数25%~30%,可制备出优良的硼交联剂,其性能优于国内通常使用的有机硼交联剂。羟丙基胍胶使用质量分数为0.5%时,形成的高温低质量分数压裂液黏度提高74.5%,残渣质量分数降低48.7%,满足180℃储层改造的需要。
In view of the problems of high dosage of thickener,poor gel breaking performance and high cost of modified guar gum high temperature resistance fracturing fluid,boron crosslinking agent which can cross-link with hydroxypropyl guar gum and make the formed fracturing fluid system have good properties was prepared,and a high temperature resistance hydroxypropyl guar gum fracturing fluid system suitable for deep tight reservoirs was obtained.The main factors affecting the crosslinking agent were analyzed and optimized.Based on the optimized results,the boron complex crosslinking agent was prepared and the comprehensive performance of the hydroxypropyl guar gum fracturing fluid system formed by crosslinking was evaluated.The results showed that,when boric acid content was 20%,crosslinking promoter content was 7%,polyol mixture content was 25%~30%,the excellent boron crosslinking agent was prepared,and its performance was better than that of organic boron crosslinking agent commonly used in China.When the concentration of hydroxypropyl guanidine gum was 0.5%,the viscosity of high temperature resistance and low concentration fracturing fluid increased by 74.5%,and the residual content decreased by 48.7%,which met the need of reservoir modification at 180℃.
作者
王子毓
WANG Zi-yu(PetroChina Dagang Zhaodong Oil Production Company,Tianjin 300280,China)
出处
《当代化工》
CAS
2020年第9期1855-1858,共4页
Contemporary Chemical Industry
基金
国家科技重大专项,大型油气田及煤层气开发(项目编号:2016ZX05007-002)
关键词
高温压裂液
低质量分数
交联剂改性
High temperature resistance fracturing fluid
Low concentration
Modification of crosslinking agent
作者简介
王子毓,工程师,毕业于西南石油大学石油工程专业,研究方向:油气田开发。E-mail:ziyu.wang@ptrzhaodong.com.cn。
