山西省王村地区隐伏侵入岩体隆起区地热地质特征  

Geothermal and Geological Characteristics of the Uplift Area of Concealed Intrusive Body in Wangcun, Shanxi Province

作　　者：张玉良 ZHANG Yuliang(Shanxi Coal Geological Prospecting Institute of Hydrology,Taiyuan 030006)

机构地区：[1]山西省煤炭地质水文勘查研究院

出　　处：《城市地质》2019年第2期42-47,共6页Urban Geology

摘　　要：祁县王村地区位于晋中盆地中部东缘,晋中盆地四周为活动断裂所控制,盆地内受不同方向的次级断层切割,形成隆凹起伏的次级构造单元。祁县王村隆起中心部位是一个岩浆岩侵入体。井深350~400m时水温28℃,多年来水温稳定,该区域存在地热异常。为了查明该区域深部地热地质条件,省地勘基金项目立项进行勘查,采用地球化学调查、地球物理勘查、地热钻探、水文测井等工作方法,推测隐伏岩体分布面积57km^2,地热勘探井深2905.65m时,井口水温仅39℃,含水层为岩体,上覆三叠、二叠系砂岩裂隙水,涌水量1064m^3/d,水化学类型为HCO3·Cl-Na型水。同时测温曲线反映,随着井深增加,井深2045.92m以下侵入岩浆岩体地层地温梯度未见明显增高,说明在长期的地壳构造活动中侵入岩浆岩体的大部分热量已散失,因此本区地热资源勘探开发前景有限。侵入岩体上覆砂岩热储层所含低温温水,对养殖业有一定的开发利用价值。The Wangcun area,Qixian County,Shanxi Province,is located in the eastern margin of the central Jinzhong basin,which is controlled by active faults.The basin is cut by secondary faults in different directions.Therefore,it forms a secondary tectonic unit with ups and downs.There is a magmatic intrusive body in the central uplift part of the Wangcun area.The water temperature is 28℃at 350~400 m depth,being stable for many years.It is proved that there are geothermal anomalies in this area.The project of the Provincial Land Prospecting Fund was surveyed to identify the deep geothermal geological conditions in the area.This paper adopts research methods of geochemical investigation,geophysical exploration,geothermal drilling and hydrological logging.It is speculated that the distribution area of hidden intrusive body is 57 km^2.The wellhead water temperature is only 39℃when geothermal exploration well is drilled to the depth of 2905.65 m.The aquifer is covered with sandstone fractured water of Triassic and Permian,which inflow rate is 1064 m^3/d and the type of hydrochemical is HCO3-Cl-Na.The temperature measurement curve reflects that with the increase of well depth,there is no significant increase in the geothermal gradient of the invading magma rock formation below the depth of 2045.92 m,which indicates that most of the heat of the intrusive body has been lost in the long-term crustal tectonic activity.Thus,the prospect of geothermal resources exploration and development is limited in this area.

关 键 词：侵入岩体 地热异常 热储层 井温梯度 水温 水化学特征 断裂带 

分 类 号：P314[天文地球—固体地球物理学]