摘要
我国东部某油田惠25区块压裂施工地层具有埋藏深（约5000m）、温度高（150—160℃）及岩性致密的特点，其对压裂液性能提出了很高的要求。通过室内研究，研制出了一种新型耐高温低摩阻压裂液。评价结果表明，该体系耐温、抗剪切性能良好（160℃、170S一下剪切90min，黏度可达100mPa·s），且具有延迟交联（交联时间120s）、低摩阻（降阻率介于35％～70％之间）、低伤害（岩心平均伤害率为17．92％）等优点，可以满足现场施工要求。
The objective fracturing formation in Hui 25 area is characterized by great buried depth( about 5 000 m),high temperature( 150 ~ 160 ℃) and tight lithology. It has high requirement to the performance of the fracturing fluid. For this reason,a novel fracturing fluid with high temperature-resistance and low friction is developed with organic boron-zirconium compound crosslinking agent Gh-g and composite temperature stabilizer based on laboratory study,and the performance of the fracturing fluid is evaluated accordingly. The experimental results show that the fracturing fluid system has a good performance under high temperature and high shearing rate. Its viscosity can maintain 100 mPa·s or even more after shearing 90 min at 160 ℃ and 170 s- 1. Furthermore,the system exhibits the feature of delayed crosslinking. It takes 120 s to crosslink completely. Another property of the fluid system is its low friction and the friction reduction rate is 35% ~ 70%. Moreover,laboratory experiments show that the fluid system has low damage to formation,and the average permeability reduction rate of cores is 17. 92%. All these advantages ensure this fracturing fluid system to meet the requirements of the fracturing construction.
出处
《西安石油大学学报（自然科学版）》
CAS
北大核心
2014年第1期80-84,9,共5页
Journal of Xi’an Shiyou University（Natural Science Edition）
基金
中石油重大专项"低渗低压储层影响措施改造方案的关键技术研究"(编号:2012-ZG-010)
关键词
高温压裂液
配方优选
耐剪切性
羟丙基胍胶
低摩阻
延迟交联
high temperature fracturing fluid
formulation optimization
resistance to shearing
hydroxypropyl guar
low friction
delayed crosslinking
