Research on SC-CO2 Heat Extraction from Abandoned Oil and Gas Wells for Geothermal Resource Development in Horizontal Wells

Xingbao Che; Chunyu Yu; Yong Liu; Yaru Liu

doi:10.62051/

Authors

Xingbao Che
Chunyu Yu
Yong Liu
Yaru Liu

DOI:

https://doi.org/10.62051/

Keywords:

Geothermal Resources; SC-CO2 Heat Extraction; Abandoned Oil And Gas Wells; Sustainable Development.

Abstract

In order to study the design and performance analysis of the SC-CO2 extraction system of side wells for geothermal resource development of abandoned oil and gas wells, a model of SC-CO2 extraction in the middle and deep layers was established, and the extraction performance of geothermal resource modification of abandoned oil and gas wells was evaluated. The pumping schemes of one injection, two injections and four injections were designed. The effects of high-temperature reservoir size, well diameter and well depth on the performance of the geothermal system were analysed. The results show that the temperature field decreases gradually after SC-CO2 injection, which is especially obvious in the large fracture zone. Four injection schemes, increasing the number of injection wells and deepening the reservoir can improve the heat extraction efficiency and cumulative extraction of the geothermal system. Increasing the injection temperature can extend the operating time of the geothermal system.

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