特种油气藏2024，Vol.31Issue(3)：70-77,8.DOI:10.3969/j.issn.1006-6535.2024.03.009
微波强化煤层气井压裂开采的物性规律
Physical Property Law of Coalbed Methane Well Fracturing Development Enhanced by Microwave
摘要
Abstract
To study the effects of microwave heating on the properties of coal,the temperature rise and cracking laws of coal under microwave action were studied through physical and numerical simulation methods.The research shows that the water cut of coal has a direct impact on the microwave heating effect,and the temperature rise rate inside the coal mass is anisotropy,which leads to the uneven heating of different parts,thereby generating thermal stress.Higher microwave power leads to more severe coal fragmentation.Microwaves applied to the fractured coal can fur-ther expand the artificial cracks.The additives in the fracturing fluid can improve the dielectric properties of coal.The production-increasing effect of slickwater fracturing fluid is significant,and it is expected to replace active wa-ter(KCl)for efficient production-increasing technology transformation.In the early stage of implementation,hy-draulic fracturing technology is used for the fracturing fluid fill into the depth of the fracture as much as possible,which can enhance the dielectric properties of the coal seam.In the later stage,using microwave heating technology can enhance the effectiveness of coalbed methane recovery.This study can provide guidance for the refracturing process of coalbed methane development.关键词
煤层气/微波加热/煤岩/压裂/热应力/介电性能Key words
coalbed methane/microwave heating/coal/fracturing/thermal stress/dielectric properties分类
能源科技引用本文复制引用
李小刚,秦杨,刘紫微,朱静怡,杨兆中,谢诗意,金心岫,高晨轩..微波强化煤层气井压裂开采的物性规律[J].特种油气藏,2024,31(3):70-77,8.基金项目
国家科技重大专项"多层复杂煤体结构区煤储层直井压裂技术研究"(2016ZX044-004-002) （2016ZX044-004-002）
四川省自然科学基金"耐高温自生泡沫压裂液生成规律及其携砂机理研究"(2022NSFSC1036) （2022NSFSC1036）
