Characterization of hydrocarbon reservoir by pore fluid and lithology using elastic parameters in an x field, Niger delta, Nigeria

  • Abstract
  • Keywords
  • References
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  • Abstract

    Quantitative rock physics analysis was carried out to determine the lithology and pore fluid of a reservoir in the Niger Delta. Density, compressional wave velocity and shear wave velocity logs were used as input to calculate elastic parameters such as velocity ratio, Poisson’s ratio, and Bulk Modulus, after estimating the hydrocarbon reservoir in the X field. The calculated velocity ratio log was used to differentiate between sand, sandstone and shale. Poisson’s ratio and velocity ratio were used delineate pore fluid content; gas sand, oil sand and sandstone formation from cross plot analysis. The reservoir in the field lies ranges from 9050 - 9426.5ft, (2760.25 – 2874.93m), this confirm what is obtained in the Niger Delta Basin. The Net Pay zones show an economical viable reservoir, it Net pay depth is 39 – 73.5ft. The Porosity and Permeability of the reservoirs suggested a productivity hydrocarbon reservoir. The reservoir lies between Gas sands, Oil sands and Brine sands, reservoir 2 and reservoir 3 are oil sand reservoirs while reservoir 1 lies between an oil sand and a brine sand.




  • Keywords

    Elastic Parameters; Bulk and Shear Modulus Gas Sands; Oil Sand; Poisson’s Ratio.

  • References

      [1] Agbasi, O. E., Inyang N. and Ibout, J. (2013), Estimation of Water Saturation in Niger Delta Nigeria Using Wire-Line logs. IOSR, Journal of Applied Physics (IOSR-JAP). E-ISSN: 2278 – 4861, volume 3, issue 4(2013) pp.66 -71.

      [2] Akpabio, I., Ibuot, J., Agbasi, O. E and Ojo, O. T. (2014), Petrophysical Characterization of eight wells from Wire-line Logs, Niger Delta Nigeria. Asian Journal of Applied Science, ISSN 2521 - 0893, volume 02, Issue 02, 105 -109.

      [3] Akankpo, A.O., Umoren E.B., and Agbasi O.E., (2015). Porosity Estimation Using Wire-Line Log to Depth in Niger Delta, Nigeria. IOSR Journal of Applied Geology and Geophysics (IOSR-JAGG) e-ISSN: 2321–0990, p-ISSN: 2321–0982.Volume 3, Issue 4 Ver. II (Jul - Aug. 2015), PP 31-38

      [4] Agbasi. O. E, Akankpo A. O., and Essien, U. E. (2017). Estimation of Reservoir Potentials of Two Wells in Niger Delta Region, Nigeria. Journal of Geosciences and Geomatics, 2017, Vol. 5, No. 2, 87-95. DOI: 10.12691/jgg-5-2-5.

      [5] Agbasi, E. Okechukwu, Godwill U. Chukwu, Magnus U. Igboekwe and Edet E. Sunday. (2018). Pore Fluid and Lithology Discrimination of a Well in the Niger Delta Region using Elastic Parameters. World News of Natural Science. WNOFNS 17 (2018) 75-88.

      [6] Aigbedion, I., (2007). Reservoir Fluid Differentiation case study from the Oredo Field. International, Journal of Physical Sciences, 2 (6): 144-148.

      [7] Bahremandi, M., Mirshahani, M., Saemi, M. (2012). “Using of Compressional-Wave and Shear Wave Velocities Ratio in Recognition of Reservoir Fluid Contacts Case Study: A Southwest Iranian Oil Field” Journal of Scientific Research and Reviews. 1(2):015–019.

      [8] Brigaud, F., Chapman, D.S., Le Douaran, S. (1990). Estimating thermal conductivity in Sedimentary Basin using lithological data and geophysical well logs: AAPG Bulleting. Vol. 74. No. 9. pp. 1459-1477

      [9] Castagna, J. P., and Batzle, M. L., and Kan, T. K., 1993, Rock physics - The link between rock properties and AVO response, in Castagna, J. P., and Backus, M. M., Eds., Offset-dependent reflectivity-Theory and practice of AVO analysis: Soc. Expl. Geophys. 124-157.

      [10] Castagna, J.P., Batzle, M.L., Eastwood, R.L. (1985). "Relationships between compressional wave and shear wave Velocities in Clastic Silicate Rocks". Geophysics. 50(4): pp. 571-581.

      [11] Chang, H., Kopaska-Merkel, D., Chen. (2002). Identification of lithofacies using Kohonen Self –Organizing Maps. Computers and Geosciences. 28: pp. 223 – 229.

      [12] Dresser Atlas (1982): Well logging and interpretation techniques. The course for home study, Dresser Atlas Publication.

      [13] Ellis, D. V., Singer, J. M. (2008). Well Logging for Earth Scientists, Dordrecht, Netherlands, Springer, pp. 692

      [14] Falebita, B. (2003). Deep drilling in the Niger Delta. Nape bulletin. Vol 10(1).

      [15] Fens, T.W., (2000). Petrophysical properties from small rock samples using Image Analysis Technique. Pp. 31, 32.

      [16] Inyang, Namdie J., Akpabio. O. and Agbasi Okechukwu E. (2017). Shale Volume and Permeability of the Miocene Unconsolidated Turbidite Sand of Bonga Oil Field, Niger Delta, Nigeria. International Journal of Advanced Geosciences, 5 (1) 37 – 45.

      [17] Inyang, N.J., Okwueze, E. E. and Agbasi, O. E. (2015), Detection of Gas Sands in the Niger Delta by Estimation of Poisson’s Dampening-Factor (PDF) Using Wireline Log Data, Geosciences, p-ISSN: 2163-1697, e-ISSN: 2163-1719, 2015; 5(1): 46-51, doi:10.5923/j.geo.20150501.06.

      [18] Han, D., Nur, A., and Morgan, D., 1986, Effects of porosity and clay content on wave velocities in sandstones: Geophysics, 51, 2093-2107.

      [19] Kupecz, J.A., Gluyas, J., Bloch, S. (1997). Reservoir Quality Prediction in Sandstones and Carbonates: An Overview

      [20] Saberi, M.R. (2013) Rock physics integration: From petrophysics to simulation. 10th Biennal International Conference and Expositions.

      [21] Schlumberger. (2000). Beginnings. A brief history of Schlumberger wireline and testing. website:

      [22] Serra, O., and Abbott, H. T., 1982. The contribution of logging data to sedimentology and stratigraphy. Soc. Pet. Eng. AIME, Spec. Pap., J: 117-131.

      [23] Tathan, R.H. (1982). Vp/Vs and Lithology. Geophysics. 47 (3): 336 - 334

      [24] Ubong E. Essien, Akaninyene. O. Akankpo and Okechukwu E. Agbasi (2017). Evaluation of Reservoir’s Petrophysical Parameters, Niger Delta, Nigeria. International Journal of Advanced Geosciences, 5(1) (2017) 19-25.




Article ID: 13274
DOI: 10.14419/ijag.v6i2.13274

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