Reservoir characterization of Paleocene Clastics and Carbonates in Chanda-01 Well, Kohat Basin, Khyber Pakhtunkhwa, Pakistan: A Petrophysical Approach

Syed Mamoon Siyar, Awais Khan, Muhammad Waqas, Shah Faisal Zeb

Abstract


The present study deals with the reservoir characterization of Paleocene reservoirs in Chanda-01 well drilled in the Kohat Basin, Pakistan. The petrophysical evaluation of the Paleocene Hangu Formation (Clastics) and Lockhart Limestone (carbonates) have been carried out using conventional Petrophysical logs. The petrophysical parameters estimated includes volume of shale (Vsh), density porosity (фD), neutron porosity (фN), sonic porosity (фS), average porosity (фA), effective porosity (фE), qualitative permeability, water saturation (Sw) and hydrocarbon saturation (Shc). One possible pay zone with 14 m thickness has been marked in the Hangu Formation and one having 10 m thickness in Lockhart Limestone after detailed interpretations. In Zone A the average petrophysical values like Vsh, фA, фE and Shc  are 4 %, 24 %, 22 % and 88 % respectively. The reservoir zone of   Lockhart Limestone has the average values of Vsh 4%, фA5%, фE4 % and Shc 85 %. Between the studied Paleocene reservoirs Hangu Formation has high porosity, while the other Lockart one has less porosity. Based on the фN and bulk density cross-plot, the lithology of Hangu Formation and Lockhart Limestone is dominated by sandstone and limestone respectively.


Full Text:

PDF

References


M. A. Khan, R. Ahmed, H. A.Raza and A. Kemal, “Geology of petroleum in Kohat Potwar depression, Pakistan”, American Association of Petroleum Geologist Bulletin,vol. 70, pp. 396- 414, 1986.

W. Paracha. A.Kemal and Abbasi, “Kohat Duplex in Northern Potwar Deformed Zone, Pakistan”, Geological Survey of Pakistan, Geologica, vol. 5, pp. 99-107,2000.

W.J. Sercombe, D.A.Pivnik, W.P.Wilson, L. Albertin, M. Beck, and M.A. Stratton, “Wrench faulting in the Northern Pakistan foreland”, American Association of Petroleum Geologist Bulletin, vol. 82, no. 11, pp. 2003-2030, 1998.

A.H. Kazmi, M.Q. Jan, “Geology and Tectonics of Pakistan, Graphic Publishers, Karachi, Pakistan, 1997.

A. H. Kazmi and R.A. Rana, “Tectonic map of Pakistan at a scale of 1:200000”, Geological Survey of Pakistan, Quetta,1982.

J. McDougall,“Strike-slip faulting in a foreland fold-thrust belt, Western Salt Range, Central Pakistan”, Tectonics, vol. 9, no. 5,

pp. 1061-1075, 1985.

I.B. Kadri, “Petroleum Geology of Pakistan”, Published by Pakistan Petroleum Limited, Karachi, Pakistan,1995.

C.R. Meissner, J.M. Master, M.A. Rashid and M.Hussain, “Stratigraphy of the Kohat Quadrangle, Pakistan”, United States Government Printing Office, Washington. USGS Prof. Paper 716-D, pp. 1-30, 1974.

G.B. Asquith and C. R Gibson, “Basic Well Log Analysis for Geologists”, The American Association of Petroleum Geologists, Tulsa, Oklahoma, USA, pp. 28-30,1982.

E.R Crain, “The Log Analysis Handbook, Volume 1: Quantitative Log Analysis Methods”, Penn Well, Tulsa, vol. 44, pp. 91-95, 1986.

M.H. Rider, “The Geological Interpretation of Well Logs”, John Wiley and Sons, New York, 1996.

S. Babar, N. Ahmad, I. Jan, M Hanif, S. Anjum, Ijaz, M. F.Mufeed, and A.Yasir, “Petrophysical analysis of the reservoir intervals in Kahi-01 well, Kohat Sub-Basin, Pakistan”, Journal of Himalayan Earth Sciences, vol. 49, no. 1, 2016, pp.30-40, 2016.

C. Schlumberger and E.G. Leonardon, “Log Interpretation Chart Book”, Houston, 201, 1996.

M.R. Shah, “Palaeoenvironments, sedimentology and economic aspects of the Paleocene Hangu formation in Kohat-Potwar and Hazara area”, Unpublished PhD thesis, National Centre of Excellence in Geology, University of Peshawar, Peshawar, Pakistan. pp. 89-92, 2001.


Refbacks

  • There are currently no refbacks.