| With the development of society, the consumption of energy is also increasing, therefore it’s significant that development of new energy. This kind of new energy needs been renewable and clean, and more important is to have plenty of resources. As far as it is concerned, the three kinds of most popular renewable energy in the world are water energy, biomass energy and geothermal energy. It’s benefit for relieve the energy situation and environmental protection to explore and use of new energy resources. As one of the three largest renewable energy, geothermal energy has attracted more and more experts’ attention, and the technology of development and utilization of geothermal energy is increasingly mature. Geothermal energy resources include deep shallow geothermal energy and deep geothermal energy, the domestic study of deep geothermal energy was still in the stage of theory, and the development and utilization of shallow geothermal energy has started and has a certain scale. The use of shallow geothermal energy mainly include power generation, health, tourism, irrigation, aquaculture, heating, etc.This paper regards Lanxi county in Heilongjiang province as study field, through collecting hydrology, meteorology, geology, geothermal and other information in the field and reference to the research results of the predecessors in the area and get geothermal reservoir parameters by geophysical prospecting and hydrogeology survey. Based on the system analysis of geothermal reservoir and heat source, channel and the characteristics of the geothermal fluid, calculate the geothermal resources and allowable exploitation quantity in the study area by geothermal reserve method and EOR(enhanced oil recovery). And analyze the water chemical composition of geothermal water in Lanxi heat 1 well, evaluate the availability of geothermal water and give preliminary suggestions for development and utilization of the geothermal water.The type of geothermal reservoirs in research area is sedimentary basin conduction type, wide area of distribution, the lithology and thickness changed little, the tectonic conditions is straightforward. The cap rock is constituted by Quaternary and nenjiang group, yaojia group and qingshankou group in cretaceous system, thermal reservoir is he upper quantou group in cretaceous, the channel of heat transfer is substratum of quantou group in cretaceous system and jurassic stratum. The thickness of thermal reservoir 141 meters, geothermal gradient of the reservoir within 1500 meters is 3.27℃/100 m. According to the results of the research area of magnetotelluric sounding, there exists that bedded sandstone in stratum between 1500 meters and 2100 meters, it’s good thermal reservoir and in accordance with geothermal mining conditions. physical property of fractures in thermal reservoir is better and it’s favorable position of heat storage. Calculation results show that the amount of geothermal resources in this area is 1.36×1014 kcal, thermal water storage capacity is 5.62 × 108 m3, the quantity of heat in thermal water is 2.29 × 1013 kcal, single well allowable yield is 207 m3/d, production capacity can reach 476 kw.According to the water temperature and water chemical composition of Lanxi heat 1 well, this geothermal water belongs to warm water of low temperature geothermal resources. This thermal can be used for physical therapy, bath, heating, greenhouse and planting industry, and the use pattern of therapy is direct use, the others are indirect use. Discharge after processing and indirect use of injection. |
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