Field/project development

Study Outlines Challenges of Repurposing Oil and Gas Wells for Geothermal Applications

This paper provides insights into the technical and economic viability of repurposing oil and gas wells for geothermal energy production for direct heating.

A finite-element model of a wellbore demonstrating gaps between cement and the formation, and plastic deformation in the cement, that can generate microfractures.
Fig. 1—A finite-element model of a wellbore demonstrating gaps between cement and the formation, and plastic deformation in the cement, that can generate microfractures.
Source: SPE 215751.

This work provides insights into the technical and economic viability of repurposing oil and gas wells for geothermal energy production for direct heating. The potential benefits—especially for areas that are highly dependent on fossil fuels for heating—and challenges of this approach are assessed, while technical, market, and policy barriers for future development are identified. Repurposing oil and gas wells for geothermal energy requires a multidisciplinary approach that involves expertise in geology, engineering, and regulatory affairs.

Introduction

Repurposing abandoned wells for power generation in geothermal energy projects can present challenges because of the low temperatures associated with these wells. The low temperature gradients and thermal energy available in such wells have been found to limit overall power-generation potential.

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