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世界深海油气资源充足,但对深水油气的开发还不是十分完善。本文研究了国外采用的深水双梯度钻井技术,详细阐述了它的技术方法、工作原理以及这些年来开发的系统。双梯度钻井系统相对于常规钻井,它的优势是建井周期短、操作更安全、生产成本低、产量高。双梯度钻井技术可以为我国南海油气的开发提供技术保障,对我国的深水开发具有指导意义。
The deep-sea oil and gas resources in the world are abundant, but the development of deep-water oil and gas is not yet perfect. This paper studies the deepwater double-gradient drilling technology used in foreign countries, and elaborates on its technical methods, working principle and systems developed over the years. Dual-gradient drilling systems have the advantage of short formation times, safer operations, lower production costs and higher yields than conventional drilling. Double gradient drilling technology can provide technical support for the development of oil and gas in the South China Sea, which is of guiding significance to the deepwater development in China.