Distinguishing the Gas-Contained Carbonate Rocks by P-S Wave Quality Factor Ratio

Abstract

Abstract: Compressional (P)-and shear (S)-wave attenuation and quality factors (Q_p and Q_s) were calculated by using the dipole shear sonic imager (DSI) log data. The studies of the features of the P-S wave attenuation in the carbonate formation containing gas and noncontaining gas show that P-wave attenuation in the carbonate formation containing gas is higher than non-containing gas. However, S-wave attenuation and quality factor do not show such a strong dependence. According to the features, this paper presents a method to distinguish the carbonate formation containing gas and non-containing gas by P-S wave quality factor ratio of Q_p/Q_s.

Key words: dipole, compressional-wave, shear-wave, quality factors, attenuation

CLC Number:

P631.84

XIN Yi, LIU Rui-lin, ZHANG Xiao-ming. Distinguishing the Gas-Contained Carbonate Rocks by P-S Wave Quality Factor Ratio[J]. Xinjiang Petroleum Geology, 2006, 27(3): 308-310.

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Distinguishing the Gas-Contained Carbonate Rocks by P-S Wave Quality Factor Ratio

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