Some high pressure, temperature and volume gas wells located in the Anadarko Basin area of Washita, Beckham, and Roger Mills counties of Oklahoma have demonstrated in several cases severe corrosion rates which has led to surface equipment and tubular failures. This paper deals primarily with the El Paso Exploration Company's approach to the corrosion problem in producing gas wells.

A basic theory on the mechanism of CO2 corrosion and the identification of this type of corrosion will be presented to insure a general understanding of this type of corrosion. A discussion on the detection and monitoring system used with comparison of water and gas analysis, visual inspections, ultrasonic thickness measurements and coupon installation. The procedures which determines whether or not a well may require corrosion treating, along with the method by which the wells are treated, and the amount of protection which can be expected from individual treatments. Some specific problems and personal observations will be presented on the corrosion that has been found in the field which may be utilized as a guide or a better indication that a corrosive environment exists. A discussion on corrosion and a corrosion program as it affects economic, environmental and personal safety aspects should a failure occur is also presented.

You can access this article if you purchase or spend a download.