Impedance Inversion and Its Application in Gas Hydrate Exploration in Shenhu Area, Northern South China Sea

Abstract

Abstract:

Impedance inversion is one of the means for oilgas reservoir prediction. In view of the complicated geology and formationdistribution features of gas hydrate, based on the 3D seismic data collected by Guangzhou Marine Geological Survey, the method, process and key technology of broadbandbased simulated annealing impedance inversion had been discussed, and the impedance data for the hydratebearing sediments of Shenhu area, Northern South China Sea were revealed in this paper. It is showed that the results of broadbandbased simulated annealing impedance inversion are of high vertical valid resolution and horizontal continuity. The very high impedance layer shows the hydratebearing sediments and relatively lower one corresponds with the free gas in Shenhu area, which coincide with the gas hydrate drilling results. Therefore, the broadbandbased simulated annealing impedance inversion may provide one of basis for gas hydrate recognition and prediction, exploration target confirmation and drilling site selection.

Key words: gas hydrate, impedance inversion, Shenhu area, Northern South China Sea

CLC Number:

P631.4

YANG Rui, WU Nen-You, LEI Xin-Hua, LIANG Jin-qiang, SHA Zhi-Bin, SU Zheng. Impedance Inversion and Its Application in Gas Hydrate Exploration in Shenhu Area, Northern South China Sea[J]. Geoscience, 2010, 24(3): 495-500.

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