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97606 PARAMETERS AFFECTING DOWNHOLE pH

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Product Number: 51300-97606-SG
ISBN: 97606 1997 CP
Author: Jeffery Willmon, Vamshidhar R. Jangama, James D. Garber
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The presence of acetic and formic acids in the produced water of gas condensate wells has been known for some time by the industry. In traditional water analysis, it has been titrated and reported as alkalinity. The calculation of accurate downhole pH values requires that these ions be analyzed separately in the water and that an organic acid material balance be performed on all three phases in the separator. In this manner, it is then possible to use phase distribution coefficients involving ionic equilibrium to determine how these acids distribute themselves between phases as the pH calculation proceeds downhole. In this paper, the above method of calculation of pH... Kevwords: pH calculations, CO2, acetic acid, formic acid, ionic equilibrium
The presence of acetic and formic acids in the produced water of gas condensate wells has been known for some time by the industry. In traditional water analysis, it has been titrated and reported as alkalinity. The calculation of accurate downhole pH values requires that these ions be analyzed separately in the water and that an organic acid material balance be performed on all three phases in the separator. In this manner, it is then possible to use phase distribution coefficients involving ionic equilibrium to determine how these acids distribute themselves between phases as the pH calculation proceeds downhole. In this paper, the above method of calculation of pH... Kevwords: pH calculations, CO2, acetic acid, formic acid, ionic equilibrium
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