Numerical simulation study on multifield coupling of enhanced geothermal systems under different fracture characteristics.

As the process of heat extraction progresses, the production temperature under all fracture characteristics shows a decreasing trend, with a high decrease rate at the early stages and a relatively low decrease rate at the middle and late stages of heat extraction.

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During heat extraction, the average in situ stress of the reservoirs generally shows an increasing trend, with a rapid increase at the early stages of heat extraction and a slight slowdown at the later stages of heat extraction.

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