纤维压裂液性能研究  

STUDY ON FIBROUS FRACTURING FLUID PROPERTIES

作　　者：赵海峰[1] 王伟 蒋成银[3] 田建超[1] 穆二飞 

机构地区：[1]中国石油大学(北京)石油工程学院 [2]中石油煤层气有限公司韩城分公司 [3]长庆油田第三采气厂

出　　处：《钻采工艺》2017年第6期90-92,11,共3页Drilling & Production Technology

基　　金：国家自然科学基金面上项目"一种复杂缝网的能量断裂准则及其在致密砂岩压裂模拟中的应用"(11672333);国家科技重大专项"复杂结构井;丛式井设计与控制新技术"(2017ZX05009-003)

摘　　要：针对纤维压裂液的降解能力问题,设计了室内实验,研究了温度、碱浓度对纤维压裂液降解能力的影响。实验表明,KTL1型纤维在10 d内无论是水解还是碱解降解率都低于60%,不适合工程使用;KTL2型纤维在75℃时,无论是水解还是碱解降解率都不超过40%,在储层温度为75℃时不适合工程使用;储层温度为100℃时,经过16 h后,降解率已达到90%以上;储层温度为120℃时,经过4 h后,降解率已达到90%以上;因此,建议在储层温度低于90℃时慎用KTL2型纤维,在储层温度高于90℃时选做工程使用,效果较好。最后评价了纤维压裂液的携砂能力和储层伤害,对长庆油田纤维压裂液的使用具有指导意义。Lab experiments have been done to study the effects of temperature and alkali concentration on degradation of fibrous fracturing fluid. The results show that degradation of KTL1 fiber in 10 days is below 60% whether by hydrolysis or by alkali,not suitable for engineering application. The degradation of KTL2 fiber is less than 40% whether by hydrolysis or by alkali at 75 ℃,not suitable for engineering use in 75 ℃ reservoirs.The degradation rate is more than 90% at 100 ℃ after 16 hours and more than 90% at 120 ℃ after 4 hours. So for reservoirs below 90℃ KTL2 fiber is not the optimum,for reservoirs over 90℃ KTL2 can have a good performance. Finally the sand carrying capacity and reservoir damage by the fibrous fracturing fluid are also evaluated. The study will be a guide for application of fibrous fracturing fluid at Changqing oilfield.

关 键 词：纤维压裂液 降解能力 携砂能力 储层伤害 

分 类 号：TE357.12[石油与天然气工程—油气田开发工程]