Material Selection and Corrosion Rate Analyzed for CO2 Injection Well

Typical materials used for CO₂ injector wells are either corrosion-resistant alloys (CRA) or epoxy-lined tubulars. The most widely adopted CRA material is 25Cr, which features a high well-application cost. Application of materials other than 25Cr for CO₂ injector wells are uncommon but may be fit for purpose. The complete paper describes material-selection methodology and corrosion studies performed in the K1 field CO₂ sequestration project using materials other than 25Cr in an effort to optimize well costs and improve overall project economics without jeopardizing CO₂ injector-well integrity.

Introduction

K1 field is in the Sarawak Basin at a water depth of 453 ft.