深水双梯度钻井技术分类及其研究进展

Classification and Research Progress of Deep Water Dual Gradient Drilling Technology

简述了双梯度钻井技术的原理。双梯度钻井系统可分为海底泵举升方案、无隔水管方案、注低密度介质方案3种类型。分析了国外公司研制的几种双梯度钻井系统的工作原理、以及技术特点。介绍了国内在双梯度钻井技术方面的研究进展,有利于促进我国深海油气勘探技术的发展,并降低钻井成本。

The principle of dual gradient drilling technology was introduced.The dual gradient drilling system can be divided into three types:submarine pump lifting scheme,Non-riser scheme and low density medium injection scheme.The working principle and technical characteristics of several dual-gradient drilling systems developed by foreign companies were analyzed.This paper introduces the research progress of dual gradient drilling technology in China and can promote the development of deep-sea oil and gas exploration technology with the reducing of the drilling cost.