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- W2978837583 abstract "In order to explore the corrosion and protection methods of casing used in CO2-riching block deep oil and gas wells, CO2 development wells, CO2 storage wells, we used high-temperature and high-pressure corrosion instrument and SEM to detect the form of corrosion product film and corrosion rate. We analyzed the basic principle of CO2 corrosion on casing steel and the influence of temperature and CO2 partial pressure on corrosion rate. We also established mathematical model for calculation and analysis of corrosion rate. The result shows that the corrosion product layer consists of three layers of films with different microstructures; the temperature and CO2 partial pressure affect the casing corrosion rate by affecting the chemical reaction process and the corrosion product film formation mechanism; the composition of the casing material, temperature, CO2 partial pressure conditions are different, the degree of change in the corrosion rate of the steel is different; when the temperature increases, the corrosion rate of N80 and J55 casings decreases, while the corrosion rate of P110 casing increases; the partial pressure of CO2 increases, and the corrosion rate of steels generally increases; the corrosion resistance of J55 steel in three casing grades is relatively strong, increasing the Cr content in the steel can effectively improve the corrosion resistance of the steel. The above research system reveals the law and mechanism of CO2 corrosion in down-hole casing under high-temperature and high-pressure conditions and establishes a corrosion rate calculation model suitable for higher temperature and pressure conditions, which provides a basis for reasonable determination of corrosion protection measures." @default.
- W2978837583 created "2019-10-10" @default.
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- W2978837583 date "2019-10-02" @default.
- W2978837583 modified "2023-09-27" @default.
- W2978837583 title "Carbon Dioxide Corrosion on Casing Under High-Temperature and High-Pressure Conditions in Deep Wells" @default.
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- W2978837583 doi "https://doi.org/10.1007/978-981-13-7127-1_24" @default.
- W2978837583 hasPublicationYear "2019" @default.
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