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冷泉活动区天然气水合物上覆水体中气泡羽状流的数值模拟

, PP. 391-399

Keywords: 天然气水合物,羽状流,冷泉,散射波,数值模拟

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Abstract:

?为研究冷泉活动区天然气水合物气泡羽状流产生的地震响应,通过含气泡介质声速模型及随机介质理论建立了羽状流水体模型.利用有限差分方法对模型进行了正演模拟,单炮地震记录上显示出羽状流产生的散射波,羽状流所在位置的散射波能量强,散射波能量较强部位旅行时极小值总是位于羽状流正上方,与激发点位置无关.炮集地震记录的叠前时间偏移剖面显示出羽状流的散射波能够清晰成像,且成像精度较高,这为进一步研究羽状流产生的地震响应奠定了基础,也为寻找天然气水合物提供了一条新的思路.

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