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Technical Committee Drilling and Completion Technology

Cement Corrosion in Oil and Gas Wells

The goal of DGMK-project 652 is to determine the main factors which are responsible for cement corrosion in oil and gas wells, and to develop concepts for improvements with respect to the cement slurry formulation, the cementing process and the impact of factors such as temperature, electrolyte containing reservoir fluids, cement admixtures, sour gas, CO2, acids etc.

To determine the state of the art, a literature survey in relevant journals and monographies with the help of data banks was performed. The results are presented in this report. At first, a detailed description of the chemistry and mineralogy of oil well cement and its corrosion processes is given. Then, current experiences from conventional concrete technology as well as the oilfield are presented. The state of art of cement corrosion in the oilfield was investigated.

Overall, little literature about cement corrosion in oil and gas wells exists. In particular, only a few field reports were ever published. The subject of cement corrosion is mainly presented in the form of laboratory tests simulating certain conditions and using common analytical methods.

J. Plank, A. Brandl
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