Research Progress on CO<sub>2</sub> and H<sub>2</sub>S Corrosion Prediction Models in Sour Gas Field
WANG Yan - ran, XIAO Jie, FAN Yong - zhao, ZHANG Yin - hui, TIAN Yuan, LI Shan
Affiliations
WANG Yan - ran, XIAO Jie, FAN Yong - zhao, ZHANG Yin - hui, TIAN Yuan, LI Shan
1. Research Institute of Natural Gas Technology, PetroChina Southwest Oil & Gas field Company, Chengdu 610213, China;2. National Energy R&D Center of High Sulfur Gas Exploitation, Chengdu 610213, China;3. High Sulfur Gas Exploitation Pilot Test Center, CNPC, Chengdu 610213, China;4. Gas Field Development Management Department, PetroChina Southwest Oil & Gasfield Company, Chengdu 610051, China
The corrosion rate prediction models about CO2 corrosion and CO2/H2S coexistence system were summarized, and the modeling ideas, factors considered, limitations of various models were expounded. CO2 corrosion prediction models were improved constantly. Flow state, corrosion product film, material and other complex factors were gradually contained in the calculation models. Some relatively mature theoretical achievements were obtained based on the semiempirical models, empirical models and mechanism models. However, less factors were contained in prediction models of CO2/H2S coexistence system at present, and the modeling methods were mainly established by empirical or semiempirical methods. On the one hand, the prediction models were not combined tightly with production on site. On the other hand, corrosion mechanism needed to be applied further to the study of prediction models.
