Seismic Inversion to Improve the Reservoir Characterization: Case Study in Central Blue Nile Basin - Sudan
Commenced in January 2007
Frequency: Monthly
Edition: International
Paper Count: 32769
Seismic Inversion to Improve the Reservoir Characterization: Case Study in Central Blue Nile Basin - Sudan

Authors: S. E. Musa, N. E. Mohamed, N. A. Ahmed

Abstract:

In this study, several crossplots of the P-impedance with the lithology logs (gamma ray, neutron porosity, deep resistivity, water saturation and Vp/Vs curves) were made in three available wells, which were drilled in central part of the Blue Nile basin in depths varies from 1460m to 1600m. These crossplots were successful to discriminate between sand and shale when using PImpedance values, and between the wet sand and the pay sand when using both P-impedance and Vp/Vs together. Also some impedance sections were converted to porosity sections using linear formula to characterize the reservoir in terms of porosity. The used crossplots were created on log resolution, while the seismic resolution can identify only the reservoir, unless a 3D seismic angle stacks were available; then it would be easier to identify the pay sand with great confidence; through high resolution seismic inversion and geostatistical approach when using P-impedance and Vp/Vs volumes.

Keywords: Basin, Blue Nile, Inversion, Seismic.

Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1100050

Procedia APA BibTeX Chicago EndNote Harvard JSON MLA RIS XML ISO 690 PDF Downloads 2419

References:


[1] Schull, (1988), Rift Basin of Interior Sudan, Petroleum Exploration and Discovery AAPG Bulletin V.72 No.10.
[2] Bosworth, W., 1992. Mesozoic and early Tertiary rift tectonics in East Africa. In: C.J. Ebinger, H.K. Gupta and 1.0. Nyambok (Editors), Seismology and Related Sciences in Africa. Tectonophysics, 209: 115- 137.
[3] Fairhead, 1988. Mesozoic plate tectonic reconstructions of the central South Atlantic Ocean:The role of the West and Central African rift system
[4] McHargue et al.,1992, Tectonstratigraphic development of the Interior Sudan rift, Central Africa:Tectono-physics, v.213, p.187-202, doi:10.1016/0040-1951(92)90258-8.
[5] Van Riel, P., 2000. The past, present, and future of quantitative reservoir characterization. The Leading edge, p. 878 – 881.
[6] Robert E Sheriff 1982 Seismic Stratigraphy. Published in India by THE English Book Depot Dehra Dun-248001.
[7] Neftex, (2010), Sequence Stratigraphy and Petroleum Geology of block 8, Blue Nile Basin. WNPOC, Sudan, Unpublished.
[8] Pendrel, J., Stewart, R.R. and Van Riel, P., 1998 Interpreting Sand Channels from 3C - 3D Seismic Inversions. SEG International Convention.
[9] Pendrel, J. and Van Riel, P., 1997. Using Seismic Inversion and Geostatistics to Estimate porosity. CSEG Convention.