Method for Identifying Stratigraphic Pinch-out Line Based on Tuner Attribute

doi:10.3969/j.issn.1006-6535.2022.01.007

Abstract

Abstract: To address the problem of unclear pinch-out lines in the Upper Wuerhe and Fengcheng Formations at Zhongguai Uplift, Junggar Basin, the distribution characteristics of pinch-out lines of target formation were characterized by the tuner attribute method in combination with seismic profile and drilling data. The results of the study proved that within the effective frequency bandwidth, the pinch-out lines identified by the tuned phase attributes of upper Wuerhe Formation at 55 Hz and Fengcheng Formation at 45 Hz were closer to the real positions, but it is difficult to improve the accuracy of the stratigraphic pinch-out line beyond the effective frequency bandwidth. The effect of this method was obviously better than that of instantaneous phase cosine, instantaneous phase and single-frequency phase, and other attributes. This method has reference significance for the characterization of pin-out lines of overburden and eroded formations.

Key words: tuned phase, stratigraphic pinch-out line, effective frequency bandwidth, discrete Fourier transform, amplitude attribute, instantaneous phase

CLC Number:

TE121.3

Yue Xiwei. Method for Identifying Stratigraphic Pinch-out Line Based on Tuner Attribute[J]. Special Oil & Gas Reservoirs, 2022, 29(1): 46-51.

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