FEASIBILITY TO DETECT GAS HYDRATE BY USING TIME DOMAIN MARINE CSEM METHOD
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摘要: 海底天然气水合物储层和低阻沉积围岩之间存在明显的电阻率差异,观测这种电阻率差异所产生的电磁异常,有可能确定天然气水合物的分布范围和饱和度。通过建立不同孔隙度和天然气水合物饱和度的一维地电模型,分析时间域海洋可控源电磁(CSEM)响应和有效异常的特征,探讨时间域海洋CSEM法探测海底天然气水合物的可行性。Abstract: There is a significant resistivity difference between the gas hydrate and the sea-floor sediment. Measuring the electromagnetic anomaly caused by the resistivity difference below sea-floor can contribute to detecting the layout and saturation of target gas hydrate reservoir. We build several one-dimensional resistivity models with gas hydrate reservoirs having different porosity and saturation. Using the models we investigated the electromagnetic anomaly caused by gas hydrate reservoirs and the feasibility to detect gas hydrate by using time domain marine CSEM method.
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Key words:
- marine time domain CSEM /
- gas hydrate /
- porosity /
- saturation
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