Operation regulation method of open geothermal system for group pumping and group irrigation facing cross-season energy storage

By dividing the geothermal well group into a central hot well group and an outer cold well group, and establishing multi-dimensional evaluation indicators, the flow rate and temperature are dynamically adjusted, solving the problem of imbalance in the well location layout and operation control of medium and deep geothermal wells, and realizing cross-seasonal energy circulation and efficient utilization.

CN122107596APending Publication Date: 2026-05-29XI AN JIAOTONG UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
XI AN JIAOTONG UNIV
Filing Date
2026-01-29
Publication Date
2026-05-29

AI Technical Summary

Technical Problem

The existing layout of medium-deep geothermal wells lacks a systematic consideration of the synergistic effect of well groups, and the operation and control strategies are rigid, making it difficult to cope with seasonal load fluctuations and changes in reservoir status, resulting in uneven energy consumption and energy waste in the reservoir.

Method used

The geothermal well group is divided into a central hot well group and a peripheral cold well group. Evaluation indicators such as heat recovery efficiency, heat breakthrough risk index, mining balance and efficiency coefficient are established. The flow rate and temperature of the well group are dynamically adjusted through real-time data feedback to build a cross-seasonal energy circulation system.

Benefits of technology

It has enabled the efficient and balanced utilization of geothermal well reservoir resources, improved the operational flexibility and energy efficiency of the geothermal system, and extended the service life of the reservoir.

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Abstract

This invention belongs to the field of geothermal energy utilization technology, and relates to a method for the operation and control of open geothermal systems with mass production and injection for cross-seasonal energy storage. The method includes: 1. Dividing geothermal wells located within the core reservoir area into central hot well groups, and wells located on the outer edge of the core reservoir area into peripheral cold well groups; 2. Establishing evaluation indicators including: heat recovery efficiency, heat breakthrough risk index, and production balance. E 1. Efficiency coefficient; 2. Under summer heat storage conditions, the peripheral cold well group pumps water, and the central hot well group reinjects water at high temperature; under winter heat extraction conditions, the central hot well group extracts heat at high temperature, and the peripheral cold well group reinjects water at low temperature; 3. Adjust the water flow rate and reinjection temperature under summer heat storage conditions and winter heat extraction conditions according to the evaluation indicators; This invention solves the problems existing in the layout and operation control of existing medium and deep geothermal wells, and realizes the efficient and balanced utilization of geothermal well heat storage resources.
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