基于声波速度分析神狐海域水合物垂向分布特征

基金项目:
国际科技合作计划(2010DFA21740)

国家重点基础研究发展计划(973)(2009CB219508)

国土资源部公益性科研专项项目(200811014-02)

详细信息

收稿日期: 2011-03-11

VERTICAL DISTRIBUTION OF GAS HYDRATE IN SHENHU AREA OF THE SOUTH CHINA SEA BASED ON ACOUSTIC VELOCITY

Received Date: 11 March 2011

摘要: 在分析了等效介质理论提出的2种模式的异同点后,结合神狐海域水合物钻井的测井数据与沉积物样品分析数据,基于物理模型的等效介质理论,计算了在不同水合物饱和度条件下的纵波速度,并估算了神狐海域某钻井沉积物孔隙空间中水合物的饱和度,进而分析水合物在沉积物层中的垂向分布特征。研究表明,神狐海域水合物主要分布在190~220 m之间,其饱和度随深度表现为先增大后减小的特点,水合物饱和度最高可达45%。
- 天然气水合物 /
- 垂向分布 /
- 饱和度 /
- 神狐海域
Abstract: The similarities and differences of the two modes raised by the effective medium theory were analyzed. Using the logging data and core samples from the drilling hole in the Shenhu area and based on the equivalent medium theory of a physical model, we estimated the saturation of gas hydrate in pore space of the sediment from a well in Shenhu area and calculated the P-wave velocity on different saturation of gas hydrate. Vertical distribution patterns of the gas hydrate in sediment layer was established. The result shows that the gas hydrate in Shenhu area mainly occurs in the depth of 190~220 m. The gas hydrate saturation increases in the beginning and decreases later on with depth. The highest saturation of the gas hydrate in this area may be as high as 45%.
- gas hydrate /
- vertical distribution /
- saturation /
- Shenhu area