Method and system for identifying high-temperature hydrothermal geothermal field in volcanic region

Abstract

The invention belongs to the technical field of volcano region information identification, discloses a method and a system for identifying a high-temperature hydrothermal geothermal field in a volcanoregion, and provides a quantitative index for judging whether the high-temperature hydrothermal geothermal field in the volcano region is suitable for hydrothermal power generation or not. The quantitative index is less involved in the existinggeothermal field exploration and identification research, and has certain innovativeness. Firstly, which geothermal field type is preliminarily judged fromearth surface thermal display, then the geothermal field type to which the geothermal field type belongs is further quantitatively judged and an underground exploration range is delineated through gravity and magnetic anomaly and a geodetic heat flow value, then fault development condition identification is carried out, and quantitative analysis of reservoir stratum lithology and quantitative analysis of resistivity measured by magnetotelluric are combined; and a corresponding type of geothermal field range suitable for hydrothermal power generation is finally delineated. Multi-parameter combined judgment, quantitative analysis and qualitative analysis are combined, and whether the geothermal field is suitable for hydrothermal power generation or not is judged as accurately as possible.

Description

technical field [0001] The invention belongs to the technical field of volcanic area information identification, and in particular relates to a method and an identification system for identifying high-temperature hydrothermal geothermal fields in volcanic areas. Background technique [0002] At present, geothermal, as a clean energy, is playing an increasingly important role in the process of economic development and energy transformation. Vigorously developing and utilizing geothermal resources plays an important role in adjusting the energy supply structure, alleviating energy supply pressure, ensuring energy supply security and promoting regional economic development. [0003] At present, in the global energy framework, geothermal energy is the energy with the highest utilization coefficient. The United States, Indonesia, the Philippines, Turkey, New Zealand and other countries have realized commercial hydrothermal power generation, and their total annual heat capacity is...

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Problems solved by technology

However, at this stage, most scholars only combine gravity and magnetic anomalies with terrestrial heat flow values ​​to delineate underground high-temperature fluids, and do not combine geothermal field geological characteristics such as the development of water-conducting faults in geothermal fields and fault combination relationships with gravity and magnetic anomalies and terrestrial heat flow values. stand up

[0010] (4) Measuring the resistivity of underground high-temperature fluids using magnetotelluric technology is the most common and relatively accurate technical means at present, which can identify the distribution of underground high-temperature fluids and the corresponding resistivity, but rarely determine the accumulation conditions, For example, if the combination of reservoirs and caprocks and stratum lithology are related to them, the range of geothermal fields delineated in this way may not have great economic value due to the poor quality of reservoirs or poor insulation effect of caprocks.

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