Honglian District of Sichuan Province is one of the most populated and economically developed areas in the province. With the implementation of the national "energy conservation and emission reduction" policy, how to apply advanced ground source heat pump technology in this area and develop the shallow geothermal energy of interest has become an important research task for geologists. Based on the ground-source heat pump project in typical areas, this paper focuses on the geological and hydrogeological conditions in the red zone, and analyzes the suitability of the ground-source heat pump in this area. Honglian District of Sichuan Province is one of the most concentrated and economically developed areas in the province. The terrain elevation of the area is relatively large with less surface water resources and uneven distribution of time and space. The surface river tributaries have fewer source shortages, long drought and more interruptions, low water level of the major rivers and difficulties in extraction; groundwater resources are scarce and most areas Groundwater and groundwater can not be used directly to apply groundwater heat pump technology to develop and utilize shallow geothermal energy. With the gradual establishment, improvement and deepening of the national "energy conservation and emission reduction" policy, how to improve the drilling technology and reduce the drilling cost, and use advanced ground source heat pump technology to reasonably develop and benefit the shallow geothermal energy in the red zone and finally achieve energy saving The effect of reducing consumption has become an important task for geologists. 1 Overview of the Red Beds The red beds in Sichuan Province refer to the Cretaceous (K) and Jurassic (J) formations in the Central Sichuan Basin with a distribution area of ​​131,800 km 2 and 106 counties (cities and districts) in 17 cities. . Its geographical coordinates are: longitude 101 ° 20'-108 ° 30 ', latitude 26 ° 00'-32 ° 20'. The subtropical humid climate, the terrain affected by the basin, cloudy fog, less sunshine, is one of the most cloudy days in the country. The coldest month (January) the average temperature of 4-6 ℃, the hottest month (August) the average temperature of 25-30 ℃. The area belongs to the Yangtze River basin. The four major tributaries of the Minjiang River, Jialing River, Fujiang River and Tuojiang River flow from the north or the north west to the south and into the Yangtze River. 2 Geological and hydrogeological conditions 2.1 Topography The topography of the red beds in Sichuan Province is controlled by tectonic framework and lithology. In the middle of the basin, between Longquan Mountain and Huaying Mountain, it is a red hill and mountainous area that has attracted thousands of miles. It is dominated by eroded hills with sandstone and mudstone superimposition. In the eastern part of the basin, between Huadong Mountain and Fangdo Mountain, The "East Ridge parallel to the ridge," Ridge between the red sand and mudstone hills longitudinal valley. Basin edge of the area is low, Zhongshan. The topography of the whole area is high in the north and low in the south, while Tuojiang River, Fujiang River and Jialing River and Qujiang River flow through the whole area from northwest to south, and the dendritic water system develops. Mianyang in central Sichuan, south of Langzhong generally less than 500m above sea level, the relative elevation of less than 100m, the heart of the belt only 30-50m, was finely divided hilly terrain; Mianyang, Langzhong north, elevation greater than 500m, the relative elevation 100-200m, is low Mountain terrain; then north elevation gradually increased, gradually transition to low, Zhongshan. Longquan Mountain is a north-easterly anticlinal ancillary low mountain on the west side, about 800m above sea level. The southern side of Weiyuan anticline is a vault-shaped low-mountain with its central part being a karst trough. There are small-area alluvial flat bars (floodplain and grade â… terraces) and ice-water accumulation slow-moving platforms (â…¡-â…¤ terraces) along both banks of the Yangtze River.
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