分散型天然气水合物对储层的物性影响特征分析

The Impact Analysis of Disseminated Gas Hydrates on Reservoir Properties

天然气水合物以不同的赋存形态存在于温压条件适合的海底沉积物及永久冻土带中。目前对于天然气水合物的勘探以地震方法为主,而随着天然气水合物钻探工作的不断开展,地球物理测井成为必不可少的工作,测井通过不同的方法采集储集层的地球物理参数,由于天然气水合物的存在对储层物性的特殊影响,在利用测井方法评价储集层时需要综合考虑这些影响因素,才能获得准确的储层参数。本文详细阐述了由于天然气水合物的存在对地层的声学、电学及密度特性的影响及其在利用这些参数评价储层时需注意的问题。

Gas hydrates exist with different modes in the temperature and pressure available sub- marine sediments and permafrost area. At present, seismic prospecting is still the primary ways for exploring gas hydrates. While with the continuously undergoing of drilling of gas hydrates, well logging has been an indispensable approach for acquiring many geophysical properties from the reservoir. For the sake of the special impact of gas hydrates on formations, only by consid- ering these factors can we get the more accurate parameters of reservoir when making parameters evaluation. This paper makes it clear that gas hydrates can affect the acoustics, electrology and density of the formation and some issues should be paid attention to.