牡丹江市镜泊乡地热地质特征及资源评价

Geological characteristics and resource evaluation of Jingpo geotherm in Mudanjiang city

为更好服务牡丹江镜泊乡地区地热资源开发利用,文章基于镜泊湖1号井取得的相关数据,分析了该区的热储层、地温场、水化学等热储特征,利用"热储法"和"回采系数法"对地热资源量和可开采热储量进行了估算。结果表明:(1)镜泊乡地热田为受构造控制的断陷沉积盆地层状孔隙型热储,热储层为新近系土门子组沉积岩,累计厚度157.20 m。热矿水矿化度为922 mg/L,平均水温48℃,水化学类型为HCO_(3)-Na型水,氟含量为12.0 mg/L,属氟化物淡温泉水;(2)镜泊乡地区热储层中储存的热量为3.35×10^(18) J,可开采出的热量为3.35×10^(17) J,热流体可开采量为275.04 L/s,热功率为5.113×10^(4) kW,年产能为2.687×10^(9) MJ;(3)黑龙江省东部敦密断裂带上的其他盆地是热储形成的潜力地段,可作为下一步地热资源勘查的远景规划区。

In order to better serve the development and utilization of geothermal resources in Jingpo area of Mudanjiang,based on the relevant data obtained from Jingpohu river 1,this paper analyzes the characteristics of thermal reservoir,geothermal field and Hydrochemistry in this area,and estimates the amount of geothermal resources and recoverable thermal reserves by using "thermal reservoir method" and "recovery coefficient method".The results show that:(1)Jingpo geothermal field is a layered porous thermal reservoir controlled by structure in a faulted sedimentary basin.The thermal reservoir is sedimentary rock of the Tumenzi formation of Neogene,with a cumulative thickness of 157.20 m.The salinity of hot mineral water is 922 mg/L,the average water temperature is 48℃,the hydrochemical type is HCO_(3)-Na type water,and the fluorine content is 12.0 mg/L,which belongs to fluoride light hot spring water;(2)The thermal energy stored in the thermal reservoir in Jingpo area is 3.35 × 10^(18) J,and the recoverable heat is 3.35 × 10^(17) J;the recoverable amount of thermal fluid is 275.04 L/s,the thermal poweris 5.113 × 10^(4) kW,and the annual production capacity is 2.687 × 10^(9) MJ;(3)Other basins on Dun-Mi fault zone in eastern Heilongjiang Province are potential areas for the formation of thermal reservoir,which can be used as prospective planning areas for the next step of geothermal resources exploration.