干热岩长期开采过程中水岩作用的研究进展  

Research progress on water⁃rock interaction during long⁃term mining of hot dry rock

作　　者：许振华[1,2] 陈晨[1,2] 钟秀平 聂帅帅 王亚斐[1,2] 马英瑞 刘昆岩 XU Zhenhua;CHEN Chen;ZHONG Xiuping;NIE Shuaishuai;WANG Yafei;MA Yingrui;LIU Kunyan(Engineering Research Center of Geothermal Resources Development Technology and Equipment,Ministry of Education,Jilin University,Changchun Jilin 130026,China;Engineering Research Center of Geothermal Resources Exploitation Technology and Equipment,Ministry of Education,Changchun Jilin 130026,China)

机构地区：[1]吉林大学地热资源开发技术与装备教育部工程研究中心,吉林长春130026 [2]吉林大学复杂条件钻采技术自然资源部重点实验室,吉林长春130026

出　　处：《钻探工程》2023年第S01期44-49,共6页Drilling Engineering

基　　金：国家自然科学基金面上资助项目“热岩裸眼水平井采热周期内井壁力学行为及其对取热的影响”(编号:42272364)。

摘　　要：干热岩资源是一种储量巨大的可再生清洁能源,我国的干热岩资源储量丰富,高效稳定开采干热岩是我国实现“双碳”战略目标的途径之一。干热岩开发主要是通过增强型地热系统完成。在干热岩开发时,岩石长期处于高温高压的水环境中,会出现岩石中不同矿物溶解/沉积的现象,造成裂缝堵塞或者管道结垢等问题。同时,在水与干热岩进行接触换热的过程中,水岩作用还会对岩石的力学性质产生影响,诱导岩石微孔隙生成、裂隙扩展,使岩石劣化损伤程度加剧,力学性能下降。本文分析了干热岩开发过程中高温高压条件下水岩作用引起的问题,阐述了水岩作用的机理,总结了当前水岩作用的实验方法以及数值模拟方法,最后对未来干热岩开发中水岩作用的研究方向进行了探讨,为今后干热岩长周期高效安全开发提供一些理论参考。Hot dry rock resource is a kind of renewable clean energy with huge reserves.Abundant hot dry rock resource reserves exist in China,efficient and stable exploitation of hot dry rock is one of the important ways to achieve the strategic goal of“double carbon”.The development of hot dry rock is mainly accomplished through enhanced geothermal systems.When developed,the hot dry rock is exposed to water environment with high temperature and high pressure for a long time.In this process,different minerals in the rock will dissolve/deposit,causing problems such as crack blockage or pipe scaling.At the same time,in the process of contact heat transfer between water and hot dry rock,the water‑rock interaction also has an impact on the mechanical properties of rock,inducing the formation of micro‑pores and the expansion of cracks,aggravating the damage degree of rock and decreasing the mechanical properties of rock.In this paper,the problems caused by water‑rock interaction under high temperature and high pressure conditions in the development of hot dry rock are analyzed,the current experimental methods and numerical simulation methods of water‑rock interaction are summarized,and the mechanism of water‑rock interaction is described.Finally,the research direction of water‑rock interaction in the development of hot dry rock in the future is discussed,which provides some theoretical reference for the long periodical,efficient and safe development of hot dry rock in the future.

关 键 词：干热岩 增强型地热系统 水岩作用 结垢问题 岩石劣化 

分 类 号：P634[天文地球—地质矿产勘探] TE37[天文地球—地质学]