中国石油大学学报（自然科学版）2024，Vol.48Issue(1)：13-24,12.DOI:10.3969/j.issn.1673-5005.2024.01.002
岩溶热储古岩溶发育机制与地热水富集模式
Mechanism and model of paleokarst development in karst geothermal reservoirs
摘要
Abstract
Understanding the mechanisms underlying ancient karst development,the evolution of formations,and character-istics of karst reservoirs holds immense significance in unveiling the occurrence patterns and enrichment principles of geother-mal resources.Using the northern Jinan geothermal field as a case study,the research focuses on elucidating the sequence stratigraphy and sedimentary facies characteristics of the Ordovician Majiagou Group carbonate rocks.It formulates the paleo-karstification types and the mechanisms governing karst geothermal reservoirs by analyzing the spatial development character-istics of surface and underground karstification,revealed through bore holes,and the distribution of the water-rich areas un-covered by geothermal wells.The evolution of karst in the northern Jinan geothermal field follows a specific process:The three-stage karst development involving contemporaneous karst,paleo-weathering crust karst,and buried karst influences lay-er distribution and regional karst development,particularly interlayered karst.The intensity of karst development is governed by structural karst.The depth of eothermal water circulation and karst development is influenced by gravitational potential.Furthermore,the model depicting strong karst development and geothermal water enrichment in the northern Jinan geothermal field is as follows:Within a depth range of 320 meters below the Ordovician roof,the strongly developed karstification zone and the geothermal water enrichment zone occur either within the compound zone consisting of interlayered karst and structur-al karst,or at the contact zone between the interlayered karst and intrusive rock masses.关键词
奥陶纪马家沟群/岩溶热储/古风化壳/层间岩溶/构造岩溶/演化过程Key words
Ordovician Majiagou Group/karstic reservoir/paleo-weathering crust/interstratified karst/tectonic karst/evo-lution process分类
能源科技引用本文复制引用
康凤新,隋海波,李常锁,魏善明,江露露,崔洋..岩溶热储古岩溶发育机制与地热水富集模式[J].中国石油大学学报（自然科学版）,2024,48(1):13-24,12.基金项目
国家自然科学基金项目(42072331,U1906209) （42072331,U1906209）
山东省泰山学者工程专项(tstp20230626) （tstp20230626）
山东省地矿局地质勘查与科技创新项目(HJ202109) （HJ202109）
