Understanding Material Selection Challenges in Geothermal Well and Systematic Qualification Approach

Abstract

Geothermal wells are usually operated under High Temperature High Pressure (HTHP) conditions where corrosion is the major threat to the well integrity. As a result, high operation cost and production time loss due to a short life span of steel casing reported in less than two years. This paper describes a study of the casing problems and failures observed in geothermal wells and a possible approach to optimize material selection and qualification of geothermal wellhead system materials.