Abstract
The harsh effects and costly losses due to erosion-corrosion in the oil and gas industry have made studying aspects of erosion, corrosion, and, the additive of the two, erosion-corrosion a high priority in recent years. Corrosion and the combined effects of erosion-corrosion have been more prevalent in recent years primarily as a result of a combination of improved oil collection techniques where CO2 is injected into the reservoirs, as well as increased development of crude with higher quantities of H2S and CO2, from drilling in deeper wells. 1 Corrosion prediction has become more important because of the difficulties in taking measurements in deeper wells and offshore drilling sites. In the past, the detrimental effects of pure erosion, CO2 corrosion (sweet corrosion) and chloride corrosion, and the combined effects of erosion-corrosion had to be considered separately. This study introduces a new test facility and testing procedure that allows all three components to be measured simultaneously using a variety of testing techniques. This new facility uses a three cell, plugged-tee test cell configuration designed to measure pure erosion, pure corrosion, and combined erosion-corrosion in a single test. Testing was completed using linear polarization resistance (LPR), electrical resistance (ER), and weight loss (WL) measurement techniques. Data from this project are being used to more accurately and effectively model and predict erosion-corrosion for a variety of field conditions.
