Application of Narrow Azimuth Seismic data in Metamorphic Fractured Reservoir Prediction

Tian, Liang; Ming, Jun; Zhang, Pingping

doi:10.1190/1.3513327

Cited by 3 publications

(1 citation statement)

References 3 publications

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“…Among high-precision 3D seismic exploration methods, wide-azimuth 3D seismic exploration is the main method adopted by major oilfields in China at present. Wide-azimuth seismic can obtain relatively complete seismic wave field information, and enhance the identification ability of faults, lithology and fractures as well, which also has greater advantages in solving the problem of anisotropy (Andreas et al 2002;Brian and Tim 2009;Li 2010). In this paper, taking Y3 area of Qijiagulong Sag in Songliao Basin in Eastern China as an example, through the analysis of wideazimuth seismic data (including frequency, signal to noise ratio, etc.…”

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Wide-Azimuth Seismic Processing Method for Shale Oil Exploration

Zhang

2023

Preprint

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Continental shale oil has become a major replacement area for increasing oil and gas reserves and production in China. Accelerating the research on exploration and development technology of continental shale oil in China is the key to improving shale oil production. Shale oil reservoirs have strong heterogeneity, it is hard to describe the "sweet spots", and higher imaging accuracy is required as well. Therefore, the use of wide-azimuth seismic data to develop research on shale oil reservoir anisotropy and resolution improvement is the key to improve the shale oil reservoirs imaging. In this paper, taking the Y3 study area in the Qijiagulong sag, Songliao Basin, eastern China as an example, by analyzing the wide-azimuth seismic raw data (including static correction, signal-to-noise ratio, frequency, etc.), the targeted processing technology of wide-azimuth data in the study area is determined. Better imaging results have been achieved, the frequency band of the wide azimuth processing section is 11Hz wider than that of the conventional processing section, and the favorable area of "sweet spot" is comprehensively predicted by using the data after wide-azimuth processing.

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confidence: 99%

Wide-Azimuth Seismic Processing Method for Shale Oil Exploration

Zhang

2023

Preprint

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Study and application of wide-azimuth seismic anisotropy analysis and correction in shale reservoir in Gulong Sag, Songliao Basin, China

Zhang,

2024

Geosci J

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Azimuth anisotropy prediction and correction of wide-azimuth seismic data

Zhang,

Li,

2024

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For seismic wave propagation in HTI media, both kinematic and dynamic attributes are anisotropic. P-waves run slower in the direction perpendicular to fracture azimuth than in the direction parallel to fracture azimuth; meanwhile, reflection strength and frequency vary with azimuth. We quantitatively analyzed azimuthal effects of reflection coefficients and velocities of seismic waves in HTI medium. The anisotropy on the azimuth gathers from theory and real wide-azimuth data was studied as well. Therefore, ellipse fitting was performed to quantitatively predict the direction and strength of the anisotropy in the study area, which was consistent with that obtained by the shear wave splitting prediction method. In wide azimuth data processing, in order to eliminate the influence of azimuthal anisotropy, the coherent spectrum pickup method was utilized to accurately calculate the azimuthal velocity of underground HTI media, and conducts azimuthal anisotropy correction processing, which eliminates the fast and slow wave time difference caused by azimuthal anisotropy, and achieves good results, providing a support for subsequent high-resolution imaging.

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Application of Narrow Azimuth Seismic data in Metamorphic Fractured Reservoir Prediction

Cited by 3 publications

References 3 publications

Wide-Azimuth Seismic Processing Method for Shale Oil Exploration

Wide-Azimuth Seismic Processing Method for Shale Oil Exploration

Study and application of wide-azimuth seismic anisotropy analysis and correction in shale reservoir in Gulong Sag, Songliao Basin, China

Azimuth anisotropy prediction and correction of wide-azimuth seismic data

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