钻探工程2024，Vol.51Issue(z1)：117-123,7.DOI:10.12143/j.ztgc.2024.S1.017
地热储层损害修复与增产技术研究
Research on restoration and stimulation technology for damaged geothermal formations
摘要
Abstract
With the large-scale implementation of deep geothermal resources exploration and development,deep drilling technology and geothermal reservoir protection and restoration are facing new challenges and problems.At present,almost all deep geothermal drilling projects are using circulation boring method of water-based drilling fluid,which caused the damage of geothermal reservoir.In terms of geothermal reservoir restoration there are no compulsory standard in China.As a result,after the completion of geothermal Wells,many of them enter into the depressurization or pumping test without standardized geothermal reservoir restoration,resulting in the wrong evaluation of geothermal resources and contract disputes.This paper is based on a large number of geothermal drilling engineering examples,combined with oil and gas reservoir reconstruction literature.The damage type,lithology,mineral composition of plugging and filling,restoration and stimulation mechanism of geothermal formation are studied.The test and engineering practice show that hydrochloric acid(HCl),mud acid(HCl+HF)and supercritical carbon dioxide can dissolve,expel,displace and expand the blockage or fracture in geothermal reservoir,which is the basic method to restore geothermal reservoir and improve the reservoir ermeability.The single restoration method is not effective in practical application,and the"two-in-one"or"three-in-one"method should be adopted in combination with the mechanism and degree of formation damage.In view of the common problems at present,the basic methods of restoration and stimulation technology for different types of geothermal reservoirs are put forward,in addition,the restoration and reconstruction of geothermal reservoirs should be an important part(working procedure)for geothermal drilling engineering.关键词
地热储层/盐酸/土酸/临界CO2/损害修复/增产Key words
geothermal reservoir/hydrochloric acid/mud acid/supercritical carbon dioxide/restoration for damaged formations/stimulation分类
能源科技引用本文复制引用
卢玮,张晗,申云飞,王金亮,顾超,白晨..地热储层损害修复与增产技术研究[J].钻探工程,2024,51(z1):117-123,7.基金项目
河南省重点研发专项"河南省中深层地热清洁能源开发利用关键技术研究与示范"(编号:231111320800) （编号:231111320800）
河南省地质研究院2024年度院管财政科研类项目"地球气体动力与地热煤系气资源形成机理研究研究"(编号:2024-331-XM026-KT03)、"地热储层损害机理与修复技术研究"(编号:2023-902-XM005-KT01) （编号:2024-331-XM026-KT03）
