干热岩水力压裂实验室模拟研究

地壳中干热岩所蕴含的地热能量巨大,已成为世界各国重点研究开发的新能源。干热岩资源开发的增强型地热工程的场地试验研究投资大、周期长、风险大,在现场压裂和人工热储层建造示范工程前,实施干热岩水力压裂实验室研究很有必要。为此,吉林大学深部地热和干热岩研究团队建设了大尺寸高温高压下干热岩水力压裂实验室模拟系统,为现场压裂工艺设计和储层改造提供参数和技术支持。本文介绍模拟系统的实验设备、实验条件和初步的实验研究成果。

Laboratory study of hydraulic fracturing on hot dry rock

Hot dry rock (HDR), which contains abundant geothermal energy, is a new type of geothermal resources and has become the worldwide focus in new energy utilization and development. The field test of enhanced geothermal engineering for development of HDR resources is costly, risky, and time-consuming. Therefore, it is necessary to carry out laboratory test for investigating the property of HDR before field fracturing and construction of artificial geothermal reservoir. The most urgent and essential problem is the research on hydraulic fracturing and micro seismic monitoring technology in the process of utilizing HDR. To further explore this issue to provide parameters and technical support for field fracturing and reservoir stimulation, Jilin University established a HDR laboratory simulation system that can carry out hydraulic fracturing of large-sized samples under high temperature and pressure. This paper focuses on the testing instrument, testing conditions and research results of the simulation system.