Effects of H2S and CO2 on cement/casing interface corrosion integrity for cold climate oil and gas well applications

Justin Beck, Ruishu Feng, Derek M. Hall, Aysel Buyuksagis, Margaret Ziomek-Moroz, Serguei N. Lvov

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Low-temperature corrosion relevant to oil and gas wells was investigated. Casing cement was exposed to brine in contact with CO2 at 4 °C and 10 MPa. Pore water was extracted from wet cement using a die press, and a cement simulated pore solution (CSPS) was developed to be used for corrosion studies. High levels of chloride similar to the original brine solution were found. The sodium content was well below that of the original brine, with the change in charge mostly balanced by an increase in dissolved calcium. The calcium content was above predictions for brine-CO2- Ca(OH)2 equilibrium, suggesting that sodium was displaced in favor of calcium. Corrosion measurements were performed on casing steel using linear polarization resistance, electrochemical impedance spectroscopy, and mass loss samples with H2S:CO2 ratios from 0 to 0.001. The corrosion rate was found to decrease slightly with increasing sulfide content from 0.02 to 0.01 mm y-1.

Original languageEnglish (US)
Title of host publicationCorrosion General Session
EditorsR. G. Buchheit, S. Virtanen
PublisherElectrochemical Society Inc.
Pages107-122
Number of pages16
Edition17
ISBN (Electronic)9781607685395
DOIs
StatePublished - Jan 1 2016
EventCorrosion General Session - 229th ECS Meeting - San Diego, United States
Duration: May 29 2016Jun 2 2016

Publication series

NameECS Transactions
Number17
Volume72
ISSN (Print)1938-5862
ISSN (Electronic)1938-6737

Other

OtherCorrosion General Session - 229th ECS Meeting
CountryUnited States
CitySan Diego
Period5/29/166/2/16

    Fingerprint

All Science Journal Classification (ASJC) codes

  • Engineering(all)

Cite this

Beck, J., Feng, R., Hall, D. M., Buyuksagis, A., Ziomek-Moroz, M., & Lvov, S. N. (2016). Effects of H2S and CO2 on cement/casing interface corrosion integrity for cold climate oil and gas well applications. In R. G. Buchheit, & S. Virtanen (Eds.), Corrosion General Session (17 ed., pp. 107-122). (ECS Transactions; Vol. 72, No. 17). Electrochemical Society Inc.. https://doi.org/10.1149/07217.0107ecst