地球物理技术在降低水合物钻井风险中的应用

The application of geophysical techniques in reducing the drilling risks induced by gas hydrates

在海洋深水钻井工程中,天然气水合物诱发的钻井风险问题正越来越引起重视,而地球物理技术在降低水合物钻井风险过程中发挥着不可替代的作用.本文首先介绍了含水合物地层的岩石物理性质,然后详细阐述了深水钻探过程中钻遇含水合物地层可能引发的各种风险,包括天然气水合物的分解以及在井筒中形成天然气水合物可能诱发的工程事故和技术问题,并对地球物理技术在降低钻井风险过程中的应用进行详细介绍,可以为我国的海洋深水钻井工程提供一定的参考.

In deepwater drilling engineering, the drilling risks induced by gas hydrates are paid more and more attention. Geophysical techniques play an irreplaceable role in reducing the risks. This paper first introduced the rock physical properties of gas hydrate-bearing sediments and then elaborated the possible risks due to the drilling of gas hydrate-bearing sediments in deep-water drilling process, including the engineering accidents and technical problems induced by the decomposition and the formation of gas hydrates in the wellbore. Also the application of geophysical techniques in reducing the drilling risks was described in detail, which can provide some references for the deepwater drilling engineering of our country.