花岗岩型干热岩储层信息获取方法及控震压裂技术介绍  

Introduction of information acquisition method and controlled seismic fracturing technology for granite⁃type hot dry rock reservoir

作　　者：陈秋 刘一凡 金雪 林睿 潘曰卓 解经宇 杨现禹 蒋国盛[5] 乔伟[2] CHEN Qiu;LIU Yifan;JIN Xue;LIN Rui;PAN Yuezhuo;XIE Jingyu;YANG Xianyu;JIANG Guosheng;QIAO Wei(Sun Yueqi College,China University of Mining and Technology,Xuzhou Jiangsu 221116,China;School of Resources and Earth Sciences,China University of Mining and Technology,Xuzhou Jiangsu 221116,China;School of Safety Engineering,China University of Mining and Technology,Xuzhou Jiangsu 221116,China;State Key Laboratory of Coal Resources and Safe Mining,China University of Miningand Technology,Beijing 100083,China;Faculty of Engineering,China University of Geosciences,Wuhan Hubei 430074,China.)

机构地区：[1]中国矿业大学孙越崎学院,江苏徐州221116 [2]中国矿业大学资源与地球科学学院,江苏徐州221116 [3]中国矿业大学安全科学与工程学院,江苏徐州221116 [4]中国矿业大学(北京)煤炭资源与安全开采国家重点实验室,北京100083 [5]中国地质大学(武汉),湖北武汉430074

出　　处：《钻探工程》2023年第S01期50-55,共6页Drilling Engineering

基　　金：国家自然科学基金青年基金“结构面影响下干热岩水力裂缝扩展行为特征及能量释放机制研究”(编号:42102353);“纳米颗粒钻井液离散元流固耦合模拟与页岩孔隙封堵机理研究”(编号:42002311);中国博士后科学基金面上项目“低渗油藏CO_(2)地质封存THM耦合模拟与砂岩破裂机制研究”(编号:2021M703512)。

摘　　要：干热岩型地热作为一种大储量的清洁能源,在日趋严峻的环保形势下,正在逐渐影响着世界能源格局,并成为学术界、政府和企业关注的焦点。开发花岗岩型干热岩需要建立增强型地热系统(EGS),其核心是向储层钻井并压裂形成一定规模的裂缝网络,构建注入井和生产井的循环回路来提取热能发电。从瑞士Basel EGS工程、韩国Pohang EGS工程等花岗岩型干热岩EGS压裂工程案例可以发现,诱发地震已成为制约花岗岩型干热岩开发的关键因素,其原因在于未明确大尺寸高倾角结构面的具体位置,无法预测压裂液在压裂过程中的流动方向,导致压裂液进入此类结构面造成结构面滑移从而诱发地震。本文将针对此问题通过查明干热岩所在储层的信息对开发花岗岩型干热岩控震压裂人工热储建造方法进行介绍。As a kind of clean energy with large reserves,hot dry rock geothermal is gradually affecting the world energy pattern under the increasingly severe environmental protection situation,and has become the focus of academia,government and enterprises.The development of granite‑type hot dry rock requires the establishment of Enhanced Geothermal Systems(EGS)and the core of EGS is to drill into and fracture the reservoir to form a certain scale of fracture network,and construct a circulation circuit of injection wells and production wells to extract thermal energy for power generation.From the EGS fracturing engineering cases of granite‑type hot dry rock such as Basel EGS project in Switzerland and Pohang EGS project in South Korea,it can be found that the induced earthquake has become a key factor restricting the development of granite‑type hot dry rock because the specific location of large‑size and high‑inclination structural plane is not clear,and the flow direction of fracturing fluid in the fracturing process cannot be predicted,which leads to the slip of structural plane caused by fracturing fluid entering such structural plane and inducing earthquake.This article will focus on this problem by identifying the information of the reservoir where the hot dry rock is located and furthermore introduce the construction method of seismic control and fracturing to build artificial heat reservoir for the development of granite‑type hot dry rock.

关 键 词：花岗岩型干热岩 增强型地热系统 诱发地震 水力压裂 矩张量反演 信息获取 控震压裂 

分 类 号：P314[天文地球—固体地球物理学] TE37[天文地球—地球物理学]