山东聊城西部地热田地热地质特征

Geological Characteristics of Geothermal Heat in Geothermal Field in West Part of Liaocheng City

山东省聊城西部地热田位于临清拗陷内的莘县凹陷的南部，面积约为1280km^2。地热类型属低温层控砂岩孔隙型，盖层为第四系和新近纪黄骅群明化镇组。常被利用的地热有新近纪黄骅群馆陶组和古近纪济阳群东营组2个热储层，其中馆陶组热储层中地热水矿化度为5000mg／L左右，可利用地热资源量为2．5490×10^18J，热水资源静储量为126．06×10^9m^3；东营组热储层中地热水矿化度较高，为6566．73—9125．38mg／L，可利用地热资源量为3．6600×10^18J，热水资源静储量为94．339×10^9m^3。该地热田中地热水主要为大气降水在深循环过程中被地温加热而成。

Geothermal heat in west part of Liaocheng city locates in south of Shenxian sag in Linqing depression with the square of 1 280 km^2. Its geotheraml heat belongs to low temperature strata sandstone crack type. Its covering is Minghuazhen formation in Quarternary and Neogene Huangye group. 2 geothermal heat reservoirs in Guantao formation of Neogene Huangye group and Dongying formation of Paleogene Jiyang group are ofiern used. Among them, degree of mineralization of underground water in the reservori in Guantao formation is about 5000mg/L, useful reserve is 2. 5490 × 10^18J and static reserve is 126.06 × 10^9m^3 ;while degree of mineralzation in the heat reservoir of Dongying formation is 6 566.73 ~ 9 125.38 mg/L, useful heat reserve is 3. 6600 × 10^18 J, and static heat reserve is 94. 339 × 10^9m^3. Geothermal heat is formed when meteroic water is heated during the period of deep circling.