Selection and Application of Floating Datum in Seismic Data Processing in Loess Plateau Area

doi:10.7657/XJPG20210116

Abstract

Abstract:

The loess plateau area in the southern Ordos basin is of “double complexity”, namely very rugged surface and super-thick LVL (low velocity layer). In order to reduce the error caused by static correction on a fixed datum, seismic data processing in time domain is often carried out on a floating datum which is selected in different ways. The comparison of how floating datums based on average statics, elevation and a fix value influence t₀ reflections indicates that, in the area with rugged surface and thick LVL, an elevation floating datum is very helpful to reduce the influences of drastically changing elevation and thick LVL on seismic data processing. The actual seismic data processing also proves the advantages of an elevation floating datum in velocity analysis and NMO stretching and mute processing.

Key words: Ordos basin, loess plateau area, seismic data processing, floating datum, average statics, t₀ reflection, velocity analysis, NMO stretching

CLC Number:

P631

XU Weiya, ZHAO Yanping, CHEN Shijun. Selection and Application of Floating Datum in Seismic Data Processing in Loess Plateau Area[J]. Xinjiang Petroleum Geology, 2021, 42(1): 113-119.

Figures/Tables 6

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