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An operator drilling off the west coast of Africa encountered high-gas content in one of their wells. In order to control pressure throughout the wellbore, the well was drilled with managed pressure drilling (MPD) techniques. It was critical for the operator to quantify CO2levels. This information would help them determine the economic viability of the reservoir before drilling farther or completing the well. Due to the highly corrosive environment, tight formation, and near-balance condition, pressure testing and sampling proved to be extremely challenging.
RCX CO2 Offshore West Africa Case Study.pdf