Corrosion Behavior and Protection Measures of Casings for Production in Salt Cavern Gas Storage Well in Jintan

In order to ensure the long-term safe operation of salt cavern gas storage well in Jintan area, the corrosion behavior of the casings for production in salt cavern gas storage well was analyzed through laboratorial evaluating tests in saturated NaCl solution. And the protection measures for improving the corrosion resistance of the casings were proposed. The results show that the casings suffered general corrosion mainly. And saturated NaCl solution had little effect on the corrosion of casings. But the Cl^- ions in NaCl solution have strong penetration capacity and adsorption capacity, which made the casings suffer localized corrosion and shortened the lives of casings. Using tube material with stronger anti-corrosion ability in design and protection measures for the casings are suggested.