Application of Absorption and Attenuation Analysis Based on Pre-Stack Seismic Data: Su-77 Block Gas Field Example

Abstract:

Most hydrocarbon absorption attenuation studies are based on poststack seismic data processing but, because of multiple stacks at full angle, poststack data will lose some lithology and hydrocarbon-bearing capacity information. To overcome this disadvantage, a prestack angle-domain absorption attenuation analysis technique can be performed for seismic data stacked at various angles to obtain angle-domain-dependent absorption profiles. The absorption anomaly reflects the gas-bearing reservoir and also decreases as the angle increases. Actual data from the Sulige gas field, Ordos Basin, have been processed, and the hydrocarbon predictions match very well with actual drilling results, validating the method's effectiveness.

• Periodical: Advanced Materials Research (Volume 772)
• Pages: 771-775
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.772.771
• Online since: September 2013
• Authors: Tong Cao, Shao Bin Guo
• Keywords: Absorption Attenuation, Hydrocarbon Detection, Lithological Gas Reservoir, Prestack Data

References

[1] Connolly P. Elastic impedance. The Leading Edge, 18(1999), pp.438-452.

[2] Gray F. D. Bridging the Gap: Using AVO to detect changes in fundamental elastic constants. Expanded Abstract of 69th SEG Mtg (1999), pp.852-855.

DOI: 10.1190/1.1821163

[3] Gray F. D., et al. The application of AVO and inversion to the estimation of rock properties. Expanded Abstracts of 70 th SEG Mtg(2000), pp.549-552.

DOI: 10.1190/1.1816120

[4] Sun P. Y. Advances in AVO techniques. Progress in Exploration Geophysics, 28(2005), pp.432-439.

[5] Eugene Lichman. Unified approach to gas and fluid detection on instantaneous seismic wavelets. SEG Technical Program Expanded Abstracts(2003), pp.1699-1702.

DOI: 10.1190/1.1817634

[6] Li L., Liu Sh. Y., Chen Zh. H., et al. Discussion of Absorption Attenuation Method. West-China Exploration Engineering, 22(2010), pp.143-145.

[7] Dong N., Yang L.Q. Application of absorption and attenuation based on wavelet transform for prediction of reservoir in tahe oilfield. Progress in Geophysics, 23(2008), pp.533-538.

[8] Bian Sh. T., Dong Y. L., Zheng J. M. Study on Application of Seismic Frequency Spectrum Attenuation to Detect Natural Gas. Oil Geophysical Prospecting, 42(2007), pp.296-301.

[9] Li ZH. CH., Wang Q. ZH. A review of research on mechanism of seismic attenuation and energy compensation. Progress in Geophysics. 22(2007), pp.1147-1152.

[10] Hudson J.A. Wave speeds and attenuation of elastic waves in material containing cracks, GeoPhys J.R. AstrSoe. (1981)，pp.133-150.

DOI: 10.1111/j.1365-246x.1981.tb02662.x

[11] Hudson J.A. overall elastic properties of isotropic materials with arbitrary distribution of circular cracks，GeoPhys.J. Int. (1990)，pp.465-469.

[12] S.E. Hough, J.M. Lees, and F. Monastero. Attenuation and Source Properties at the Coso Geothermal Area, California. Bulletin of the Seismological Society of America, 89(1999), pp.1606-1619.

DOI: 10.1785/bssa0890061606

[13] Rahul Dasgupta , Roger A. Clark, et al. Estimation of Q from surface seismic reflection data. Geophysics. 63(1995), pp.2120-2128.

DOI: 10.1190/1.1444505

[14] Zhang CH. J. and Tadeusz J. Ulrych et al. Estimation of quality factors from CMP records, Geophysics. 67: (1999), pp.1542-1547.

DOI: 10.1190/1.1512799

[15] Shi S. Q., Zhao Y. H. Research on gas-bearing prediction using AVO in sandstone reservoir with low-impedance, Sulige gas field[J]. Oil Geophysical Prospecting, 28(2003), pp.77-83.