Carbonate Reservoir Identification Based on Pure P-Wave Data

doi:10.7657/XJPG20200515

Abstract

Abstract:

Regarding the characteristics of large burial depth and strong heterogeneity of the paleokarst carbonate reservoir in the Tarim basin, the pure P-wave data calculated from pre-stack inversion are introduced to replace the traditional full-stack seismic data so that the accuracy of wave impedance inversion and reservoir prediction can be improved. The numerical modeling results suggest that compared with the theoretical zero-offset data, the computed pure P-wave data have negligible errors, while the traditional full-stack data inevitably contain errors that might associated with different factors, i.e., wavelet, incidence angle range and reflection boundary. The field data comparison in the Wellblock ZG8, Tazhong area shows that when the dominant frequency of P-wave in target carbonate strata has been improved by 8 Hz, the fitting rate of reservoir prediction result with actual drilling result can be increased by 7.39%, which provides practical methods and corresponding standards for the reservoir prediction in the carbonate reservoirs in Tarim basin.

Key words: Tarim basin, Wellblock ZG8, carbonate rock, reservoir prediction, pre-stack inversion, pure P-wave data

CLC Number:

TE112.24

ZHANG Yuanyin, SUN Zandong, YANG Haijun, HAN Jianfa, ZHANG Jingting. Carbonate Reservoir Identification Based on Pure P-Wave Data[J]. Xinjiang Petroleum Geology, 2020, 41(5): 605-611.

Figures/Tables 8

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Table 1

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