论文部分内容阅读
对埋藏浅，油层温度低的油藏进行压裂改造，需解决压裂液低温破胶水化的问题。采用活化剂来提高过硫酸铵（ＡＰＳ），酶，胶囊破胶剂的低温破胶能力。通过对有机硼交联的羟丙基瓜胶（ＨＰＧ）压裂液低温下破胶后粘度损失率的测定，筛选出用于５０℃下的ＡＰＳ／活化剂破胶系统及胶囊破胶剂。结果表明：在ＡＰＳ／活化剂破胶系统的作用下，采用有机硼作交联剂的ＨＰＧ压裂液在较低温度条件下能彻底破胶水化。
For shallow buried reservoirs with low reservoir temperature, it is necessary to solve the problem of low pressure fracturing hydration in fractured reservoirs. The use of activators to improve the ammonium persulfate (APS), enzymes, capsules breakers low gel breaking capacity. The APS / activator breaking system and capsule breaker at 50 ℃ were screened through the determination of viscosity loss rate of HPB fracturing fluid crosslinked by organoboron at low temperature. The results show that under the action of APS / activator breaking system, HPG fracturing fluid using organic boron as crosslinking agent can completely break hydration at lower temperature.