鲁西北地区明化镇组地热储/盖层及热储流体化学特征  

Characteristics of Geothermal Reservoir/Cap Rock and Fluid Chemical Characteristics of Minghuazhen Formation in Northwestern Shandong Province

作　　者：张红红 张姗 唐天明 刘鹏磊 王昕宇 李晓静[2] 杜亚虎 ZHANG Honghong;ZHANG Shan;TANG Tianming;LIU Penglei;WANG Xinyu;LI Xiaojing;DU Yahu(Shandong Provincial Geo-Mineral Engineering Co.,Ltd.,Ji’nan,Shandong 250000;Shandong University of Science and Technology,Qingdao,Shandong 266590)

机构地区：[1]山东省地矿工程集团有限公司,山东济南250000 [2]山东科技大学,山东青岛266590

出　　处：《中国煤炭地质》2024年第7期29-34,共6页Coal Geology of China

基　　金：山东省地矿工程集团有限公司科技项目“山东省地热源储盖地质背景及类型划分研究”。

摘　　要：基于鲁西北地热区地热勘查、热储水地球化学及综合编图等工作,研究了鲁西北地区明化镇地热储/盖层等特征。研究表明,研究区主要为层状热储,地温相对于其它地热区均匀,具有较高的热流值和富水性较强的含水层,是山东省地热资源开发潜力较大的地区。明化镇组上部发育杂色砂质黏土、砂质泥岩、泥岩和粉砂岩、细粒砂岩;下部发育砂质泥岩、泥岩及细粒砂岩、中细粒砂岩,总的分布规律是自西向东厚度由厚变薄,在凸起区埋藏浅、厚度薄,凹陷区埋藏深、厚度大。热储分布规律:顶板埋深约500m,底板埋深为500~1 100m,局部地段最深可达1 300m,热储厚度一般为30~120m,凸起区热储厚度小,凹陷区热储厚度大,新近系明化镇组上段可视为相对热储盖层,厚度970~1 130m,岩性由黏性土、砂性土组成,其密度小,导热性能差,热阻大,是天然的良好热储保温层。Based on the work of geothermal exploration,geothermal reservoir water geochemistry and comprehensive mapping in the geothermal area of northwest Shandong,the characteristics of geothermal reservoir/cover rock of Minghuazhen Formation in northwest Shandong were studied.The research shows that the thermal reservoir in the study area is mainly a layered thermal reservoir,and the ground temperature is uniform compared with other geothermal areas,aquifer with high heat flow value and strong water abundance,which is the area with the greatest potential for geothermal resource development in Shandong Province.The upper part of Minghuazhen Formation develops variegated sandy clay,sandy mudstone,mudstone,siltstone and fine sandstone.Sandy mudstone,mudstone,fine sand and medium-fine sandstone are developed in the lower part.The general distribution law is that the thickness becomes thinner from west to east.In the uplift area,the burial depth is shallow and the thickness is thin.In the depression area,the burial depth is deep and the thickness is large.The distribution law of thermal reservoir is that the buried depth of roof is about 500 m,the buried depth of floor is 500~1100 m,the deepest depth of local area can reach 1300 m,the thickness of thermal reservoir is generally 30~120 m,the thickness of thermal reservoir in convex area is small,and the thickness of the thermal reservoir in depression area is large.The Neogene Minghuazhen Formation is regarded as a relative thermal reservoir cover rock with a thickness of 970~1130 m.The lithology is composed of cohesive soil and sandy soil.It has low density,poor thermal conductivity and large thermal resistance.It is a natural good thermal reservoir insulation layer.

关 键 词：明化镇组 地热储层 地热盖层 鲁西北地区 

分 类 号：P314[天文地球—固体地球物理学]