干热岩热储建造的二氧化碳爆破致裂器优化设计  

Optimum design of CO2 fracture initiator for thermal reservoir construction in hot dry rock

作　　者：夏杰勤 窦斌[1,2] 徐超 田红 郑君[1,2] 崔国栋 谷俊廷 陈劲 XIA Jieqin;DOU Bin;XU Chao;TIAN Hong;ZHENG Jun;CUI Guodong;GU Junting;CHEN Jin(Faculty of Engineering,China University of Geosciences,Wuhan Hubei 430074,China;National Center for International Research on Deep Earth Drilling and Resource Development,Wuhan Hubei 430073,China;The First Geology Brigade,Hebei Bureau of Geology and Mineral Resources,Handan Hebei 056001,China)

机构地区：[1]中国地质大学〈武汉〉工程学院,湖北武汉430074 [2]地球深部钻探与深地资源开发国际联合研究中心,湖北武汉430074 [3]河北省地矿局第一地质大队,河北邯郸056001

出　　处：《钻探工程》2021年第1期75-80,共6页Drilling Engineering

基　　金：国家自然科学基金项目“共和盆地储层干热岩人工裂隙与流体传热机理及热能效应研究”(编号:41674180);中国地质大学(武汉)实验技术研究项目“多场耦合水-岩相互作用下砂岩热储层动态监测”(编号:SKJ2019088);中国地质大学(武汉)大学生自主创新启航项目“多场耦合水-岩作用下砂岩热储层改造机理研究”(编号:1910491A18)。

摘　　要：干热岩作为一种可再生的清洁能源,如何开采具有重要意义,但温度和深度双重因素导致干热岩型地热资源开采难度大。在开采过程中,储层建造是其中的关键技术。储层建造产生大规模的体积裂隙网络,以保证有大面积的换热通道进行长期的热能提取,二氧化碳爆破致裂技术作为一种新方法为储层建造提供了新思路。本文简述了二氧化碳爆破致裂技术,以及爆破过程中二氧化碳充装量、活化剂用量、定压片厚度之间的内在关系,重点优化了用于干热岩型地热储层建造的二氧化碳致裂器,设计了致裂器内部结构的具体参数,完善了外部结构和整体系统,最终研发了一种可用于干热岩型地热储层建造的新型二氧化碳致裂器,为干热岩型地热储层建造提供有效的技术手段,填补了耐高温高压的井下二氧化碳致裂器领域的空白。How to mine hot dry rock,which is a kind of renewable clean energy,is of great significance;however,both the temperature and depth of hot dry rock makes it difficult to exploit hot dry rock geothermal resources.In the mining process,reservoir construction is one of the key technologies.Reservoir construction produces a large‑scale volumetric fracture network to ensure a large area of heat exchange channels for long‑term thermal energy extraction.As a new method,the carbon dioxide blasting fracturing technology provides new ideas for reservoir construction.This paper briefly describes the carbon dioxide blasting fracturing technology,as well as the internal relationship between the amount of carbon dioxide charged,the amount of activator,and the thickness of the rupture disc during the blasting process.The carbon dioxide fracture initiator used in the construction of hot dry rock geothermal reservoirs is optimized.The specific parameters of the internal structure of the initiator have been designed,and the external structure and overall system have been improved.Finally,a new type of carbon dioxide initiator that can be used in the construction of hot dry rock geothermal reservoirs is developed,which provides effective technical means for the construction of hot dry rock geothermal reservoirs,and fills the gap in the field of downhole carbon dioxide fractur initiators that are resistant to high temperature and pressure.

关 键 词：储层建造 干热岩 二氧化碳爆破 致裂器 结构优化 

分 类 号：P314[天文地球—固体地球物理学]