关键词: 固井, 超深水, 高温高压, 浅层气, 盐膏层, 技术进展

Abstract: China’s offshore oil and gas exploration and development has been set on the track of high-speed development since the 12th Five-year Plan Period. Offshore cementing faces sterner challenges under the complicated well conditions, such as super-deep water, high temperature and high pressure, and shallow-layer gas. Based on the cementing technological research projects in the 12th Five-year Plan Period, COSL has developed a series of high-functional cementing additives, perfect cementing process technology, accurate cement slurry appraising instrument and stable and reliable cementing equipment. Significant progress has been made in such cementing areas as cement sheath integrity under high temperature and high pressure, deepwater, shallow-layer gas and high-pressure gypsum. This paper focuses on low oil prices, new exploration areas, production at old oilfields and safety and environmental protection and looks forward into future offshore cementing technological development direction. It is pointed out that cementing products calls for serialization and standardization while the efforts for creation and research should be focused on the well-tailored cement slurry system and cementing technology and tools.