Interaction tests of geothermal wells in Tótkomlós

At the beginning of 2023, an important milestone of a project that started in 2019 was reached. We had to determine the interaction of two production and two injection geothermal wells in the Tótkomlós area by performing production and injection tests. Our company participated in this work together with several other companies, and our task was to continuously register surface and depth parameters at exceptionally high temperatures of 130-140 °C for Hungarian geothermal conditions.

We registered the depth pressure and temperature simultaneously in all four wells, using high-temperature memory probes installed by slickline method.

In addition, we had to continuously register online the wellhead pressure, the amount and temperature of the outflowing water, determine the gas-water ratio, take gas-water samples and perform laboratory tests on the well that was operating at the time.

At the end of the tests, we provided our partners with a total of 290 hours of depth and 140 hours of surface registered data.

Geothermal wells are boreholes that reach deep into the Earth’s crust and tap into the hot water or steam that can be used for various purposes, such as heating, cooling or electricity generation.

Geothermal wells can be classified into two main types: production wells and injection wells. Production wells are those that bring the geothermal fluid to the surface, while injection wells are those that return the cooled fluid back to the reservoir.

The interaction of geothermal wells is an important factor that affects the performance and sustainability of a geothermal system. The interaction can be positive or negative, depending on the distance, orientation and operation mode of the wells.

To measure the interaction of geothermal wells, various methods can be used, such as production and injection tests, tracer tests, pressure interference tests and temperature interference tests.

One of our company’s specialization is conducting production and injection tests, as well as registering depth pressure and temperature data with high-temperature memory probes. We use modern equipment and techniques to ensure the accuracy and reliability of our measurements.

We believe that geothermal energy is a valuable resource that can provide clean, renewable and affordable energy for Hungary and beyond.

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