深层地热热储改造技术进展与发展建议  

Technical Advancements and Development Suggestions of Geothermal Heat Reservoir Stimulation in Deep Formations

作　　者：陈作 赵乐坤 卫然 刘星 CHEN Zuo;ZHAO Lekun;WEI Ran;LIU Xing(Sinopec Research Institute of Petroleum Engineering Co.,Ltd.,Beijing,102206,China)

机构地区：[1]中石化石油工程技术研究院有限公司,北京102206

出　　处：《石油钻探技术》2024年第6期10-15,共6页Petroleum Drilling Techniques

基　　金：国家自然科学基金重大项目“干热岩地热资源开采机理与方法”(编号:52192621)资助。

摘　　要：我国深层地热资源量非常丰富,但因具有温度高、硬度高、应力高、施工压力高等“四高”特征,通过热储改造经济利用其热能难度极大,大量深层高温沉积岩及干热岩等深层地热资源因技术与经济原因尚未得到规模动用。总结分析了当前国内外深层地热热储改造技术的最新进展,认识到传统的直井或斜井注采模式及笼统的压裂改造方法难以满足深层地热效益开发需求。为此,提出了大力发展“直井+水平井”或“水平井+水平井”联合注采井网+分段压裂技术及配套的耐高温工具、材料与裂缝系统定量表征技术等建议,可为加速我国能源转型与早日实现“双碳”目标提供参考。China has abundant geothermal resources in deep formations.Due to the characteristics of high temperature,high hardness,high stress,and high operation pressure,it is extremely difficult to economically utilize its heat energy through heat reservoir stimulation.A large number of geothermal resources in deep formations,such as high-temperature sedimentary rocks and dry hot rocks,have not been utilized on a large scale due to technical and economic limits.The latest research advancements of geothermal heat reservoir simulation in deep formations in China and overseas was summarized.It was found that the conventional injection and production mode of vertical wells or inclined wells and the general fracturing method failed to meet the needs of geothermal economical development in the deep formation.Therefore,suggestions were proposed,i.e.extensively developing combined injector and producer pattern of“vertical wells+horizontal wells”or“horizontal wells+horizontal wells”+staged fracturing technology,supporting high temperature-resistant tools and materials,and fracture system quantitative characterization technology,so as to ramp up China’s energy transformation and facilitate the achievement of“carbon peaking and carbon neutrality”goals.

关 键 词：深层地热 联合注采井网 热储改造 复杂裂缝系统 换热 

分 类 号：P314[天文地球—固体地球物理学]