Comparison of Well Completions used in Oil/Gas Wells and Geothermal Wells: a New Approach to Technology Transfer

Teodoriu, C. and Falcone, G. (2008) Comparison of Well Completions used in Oil/Gas Wells and Geothermal Wells: a New Approach to Technology Transfer. In: 33rd Workshop on Geothermal Reservoir Engineering, Stanford, CA, USA, 28-30 Jan 2008,

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Publisher's URL: https://pangea.stanford.edu/ERE/db/IGAstandard/record_detail.php?id=5271

Abstract

Renewable energy is seen as the future source for meeting the world’s growing demand, with geothermal offering a constant and independent supply. Tapping geothermal energy is not always straightforward as deep drilling is required in order to access this high -temperature resource. Geothermal drilling is expensive and is financed by the operator (usually districts or state representatives) with a long period of debt service before costs can be recovered from the energy sale (heat, electricity or a combination of both). It is reported that the success rate for geothermal wildcat wells is only 25-40%, so a reduction in the exploratory drilling costs would be a major incentive for increased exploitation of this resource. However, drilling costs are only a part of the total well expenditure. Tubulars can double the total well cost , especially when complex well completions are required. Together, drilling and well completions can account for more than half of the capital cost for a geothermal power project. This paper presents a comparison of different well completions used for oil, gas and geothermal wells. The study identifies ways in which to facilitate a faster technology transfer from the traditional oil and gas arena to the developing geothermal industry. The study provides engineers with a better understanding of geothermal well completion needs and suggests ways to reduce cost.

Item Type:Conference Proceedings
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Falcone, Professor Gioia
Authors: Teodoriu, C., and Falcone, G.
College/School:College of Science and Engineering > School of Engineering > Systems Power and Energy

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