Carbonate rock geothermal well fixing method based on tectonic stress field

Abstract

The invention is suitable for the technical field of carbonate rock geothermal resource exploration and prospecting, and provides a carbonate rock geothermal well fixing method based on a tectonic stress field. The method comprises the following steps: step 1, analyzing a tectonic stress field: determining a regional fracture tectonic occurrence and a principal stress direction, determining a target region fracture tectonic occurrence and a principal stress direction, and judging a principal stress direction near a planned well position; 2, carbonate rock heat storage geothermal water power condition analysis is carried out, and runoff characteristics of the geothermal water of the fault zone and the interlayer karst development area based on the tectonic stress field condition are obtained; step 3, determining a carbonate rock structure well fixing mode through modes of fracture stress condition, water conductivity identification and accurate geophysical exploration; 4, determining the interlayer karst well fixing mode of the carbonate rock thermal reservoir through interlayer erosion analysis, and finally determining the drilling position. Through the steps, the geothermal resource exploration cost can be reduced, and the geothermal prospecting accuracy is improved.

Description

technical field [0001] The invention relates to the technical field of carbonate rock geothermal resource exploration and prospecting, in particular to a carbonate rock geothermal well setting method based on a tectonic stress field. Background technique [0002] Carbonate thermal reservoirs have the characteristics of abundant geothermal resources, good mining conditions, large water influx per well, and easy recharge. They are one of the main thermal reservoirs for the development and utilization of mid-deep geothermal resources. However, due to the deep burial depth of thermal reservoirs and uneven development of fissures and karsts, it is difficult to explore and locate wells. [0003] Karst development is controlled by tectonic faults, especially extensional or extensional torsional faults, and forms a network of karst fractures with interlayer karst development, which becomes the storage space for underground hot water. The compressive fracture and compressive torsion...

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Problems solved by technology

[0005] The purpose of the embodiments of the present invention is to provide a method for determining wells in carbonate rock geothermal wells based on tectonic stress field, aiming to solve the following problems: the existing method of purely relying on geophysical exploration, the detection line of large-scale planar layout objects, the search guide Water fracturing has a large workload and high investment; affected by the lithology of the formation, there are many solutions in geophysical prospecting, and the resistivity may be distorted in karst identification, which reduces the accuracy of geothermal exploration to a certain extent and increases the cost of exploration, so it is difficult to obtain widely used

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