Application of integrated physical exploration methods in geothermal investigations of Hequan farm in Anhui Province
Hequan Farm in Anhui Province is located in Yuhui District,Bengbu City,and in order to meet the subsequent development needs of the farm,geothermal resource investigation work mainly based on comprehensive physical exploration was carried out in the vicinity of the farm. Comprehensive physical exploration methods include ground high-precision magnetic method,audio geomagnetic bathymetry( AMT)and controlled-source audio geomagnetic bathymetry( CSAMT),and the geological conditions in the area and the results of this comprehensive physical exploration have achieved the following main results and conclusions:(1)it is clear that the main direction of geothermal exploration in the area is water-bearing fracture structure;(2)it is assumed that there are four fracture structures in the area,namely NE F1,near-south-north F2,near-south-north F3,north-northeast F4. Among which F4 deep and large fracture structure is conducive to geothermal formation and water conduction,and is the preferred possible water-bearing fracture structure;(3)It is circled that near 2000 points of V1 line is a suitable well location for geothermal wells,and it is recommended to drill to a depth of 1400 m. On the one hand,the results of this project have proved the validity of the comprehensive physical exploration method in the detection of hidden fracture structures,and provided the direction of the subsequent geothermal exploration;on the other hand,as a systematic geothermal investigation method,it can be used for the geothermal investigation in the similar area. On the other hand,as a systematic geothermal investigation method,it has important reference significance for similar work in similar areas.
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