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Integrated interpretation with Gassmann fluid substitution for optimum field development of Sanghar area, Pakistan: a case study

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Abstract

The optimum field development of area under exploration for hydrocarbons requires an integrated analysis of seismic and well log data. Fluid substitution is a process which provides a tool for fluid identification and quantification in a reservoir during the development phase. In the present study, an integrated approach of seismic, petrophysics, and Gassmann fluid substitution has been applied on Goru sands of Sanghar area, Pakistan, for optimum field development. The results of seismic indicate probable prospect zones of hydrocarbons in eastern and western part of the study area. These prospect zones have vertical closures of 20 to 50 ms and 20 to 30 ms at Goru sands and Chiltan levels, respectively. Four hydrocarbon-bearing zones (zones 1, 2, 3, and 4 with thicknesses of 28, 9, 24, and 8 m respectively) were identified on the basis of petrophysical interpretation of well log data at Goru sand level. Fluid substitution results at Goru sand level show maximum variation of P-wave velocity and density when hydrocarbon phase was substituted completely with water. This represents the maximum change in the acoustic impedance after complete extraction of hydrocarbon phase which can be modeled using synthetic seismograms.

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References

  • Ali A, Ahmad Z, Akhtar G (2005) Structural interpretation of seismic profiles integrated with reservoir characteristics of Qadirpur area. Pak J Hydrocarb Res 15:25–34

    Google Scholar 

  • Al-Sadi HN (1980) Seismic exploration technique and processing, 1st edn. Birkhauser Verlag publications, Basel, 215

    Book  Google Scholar 

  • Asquith G, Gibson CR (1982) Basic well log analysis for geologists. AAPG memo. AAPG, Tulsa, 216

    Google Scholar 

  • Asquith GB, Krygowski D, Gibson, CR (2004) Basic well log analysis. American Association of Petroleum Geologist

  • Avseth P, Mukerji T, Mavko G (2005) Quantitative seismic interpretation: applying rock physics tools to reduce interpretation risk. Cambridge University Press, Cambridge

    Book  Google Scholar 

  • Badley M (1985) Practical seismic interpretation. IHRDC Publishers, Boston, 266

    Google Scholar 

  • Banks CJ, Warburton J (1986) Passive roof duplex geometry in the frontal structure of Kirthar and Sulaiman Mountain Belt, Pakistan. J Struct Geol 8:229–237

    Article  Google Scholar 

  • Batzle ML, Wang Z (1992) Seismic properties of pore fluids. Geophysics 64:1396–1408

    Article  Google Scholar 

  • Berryman J, Berge P, Bonner B (2002) Estimating rock porosity and fluid saturation using only seismic velocities. Geophysics 67(2):391–404

    Article  Google Scholar 

  • Castagna JP, Batzle ML, Eastwood RL (1985) Relationship between compressional-wave and shear-wave velocities in clastic silicates. Geophysics 50(4):571–581

    Article  Google Scholar 

  • Duffy J, Mindlin RD (1957) Stress–strain relations and vibrations of a granular medium. J Appl Mech 24:585–593

    Google Scholar 

  • Fatmi AN (1973) Lithostratigraphic units of Kohat –Potwar Provence, Indus Basin Pakistan. Pak Geol Surv Mem 10:80

    Google Scholar 

  • Gassmann F (1951)Über die elastizitätporösermedien: Vierteljahrsschrift der NaturforschendenGesellschaft in Zurich 96:1–23

  • Han DH, Batzle ML (2004) Gassmann’s equation and fluid-saturation effects on seismic velocities. Geophysics 69(2):398–405

    Article  Google Scholar 

  • Hill R (1952) The elastic behavior of a crystalline aggregate. Proc Phys Soc Lond Ser A 65:349–354

    Article  Google Scholar 

  • Iqbal MWA, Shah SMI (1980) A guide to the stratigraphy of Pakistan, geological survey of Pakistan records. Geol Surv Pak Quetta 53:34

    Google Scholar 

  • Kadri IB (1995) Petroleum geology of Pakistan. Pakistan Petroleum Limited, Karachi

    Google Scholar 

  • Kadri IB (1993) Cretaceous source rocks in Pakistan. AAPG/ SVG, International Conference and Exhibition, Venezuela

  • Kingston DR, Dishroon CP, Williams PA (1983) Global basin classification system. AAPG Bull 67(12):2175–2193

    Google Scholar 

  • Krief M et al. (1990) A petrophysical interpretation using the velocities of P and S waves (full-waveform sonic). Log Analyst, 31, November, pp 355–369

  • Kumar D (2006) Tutorial on Gassmann fluid substitution: formulation, algorithm and Matlab code: Geohorizons

  • Lines LR, Newrick RT (2004) Fundamentals of geophysical interpretation. Society of Exploration Geophysicists

  • Mavko G, Mukerji T, Dvorkin J (2009) The rock physics handbook: tools for seismic analysis in porous media: Stanford Univ. Press

  • Nguyen PKT, Nam MJ (2011) A review on methods for constructing rock physics model of saturated reservoir rock for time-lapse seismic. Geosyst Eng 14(2):95–107

    Article  Google Scholar 

  • Quadri VUN, Shuaib SM (1986) Hydrocarbon prospects of southern Indus basin, Pakistan. Am. Assoc. Pet. Geol., Bull, United States.70, no. 6

  • Russell BR, Hedlin K, Hilterman FJ, Lines LR (2003) Fluid-property discrimination with AVO: a Biot-Gassmann perspective. Geophysics 68:29–39

    Article  Google Scholar 

  • Schlumberger (1972) Log interpretation manual/principles. Vol I. Schlumberger Well Services, Inc, Housten

    Google Scholar 

  • Schlumberger (1991) Log interpretation principles/applications. Schlumberger Educational Services

  • Simm R (2007) Practical Gassmann fluid substitution in sand/shale sequences. First Break 25(12):61–68

    Google Scholar 

  • Skelt C (2004) Fluid substitution in laminated sands. Lead Edge 23(5):485–493

    Article  Google Scholar 

  • Smith TM, Sondergeld CH, Rai CS (2003) Gassmann fluid substitutions: a tutorial. Geophysics 68:430–440

    Article  Google Scholar 

  • Telford WM, Sheriff RE (1990) Applied geophysics (vol. 1): Cambridge University Press

  • Tiab D, Donaldson EC (2011) Petrophysics: theory and practice of measuring reservoir rock and fluid transport properties. Gulf professional publishing

  • Wood AW (1955) A textbook of sound. The Macmillan Co., New York

    Google Scholar 

  • Zhu X, McMechan GA (1990) Direct estimation of the bulk modulus of the frame in fluid saturated elastic medium by Biot theory: 60th Ann. Internat. Mtg., Soc. Expl. Geophys., Expanded Abstract 787–790

  • Zinszner B, Pellerin FM (2007) A geoscientist’s guide to petrophysics. Editions Ophrys

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Acknowledgments

Prof. Dr. Gulraiz Akhter would like to thank the Directorate General of Petroleum Concessions (DGPC), Pakistan, for allowing the use of seismic and well log data for research and publication purposes and the Department of Earth Sciences, Quaid-i-Azam University, Islamabad, Pakistan, for providing the basic requirements to complete this work.

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Authors and Affiliations

  1. Department of Earth Sciences, Quaid-i-Azam University, Islamabad, Pakistan

    Gulraiz Akhter, Zulfiqar Ahmed, Adnan Ishaq & Aamir Ali

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  1. Gulraiz Akhter
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  2. Zulfiqar Ahmed
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  3. Adnan Ishaq
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  4. Aamir Ali
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Correspondence to Gulraiz Akhter.

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Akhter, G., Ahmed, Z., Ishaq, A. et al. Integrated interpretation with Gassmann fluid substitution for optimum field development of Sanghar area, Pakistan: a case study. Arab J Geosci 8, 7467–7479 (2015). https://doi.org/10.1007/s12517-014-1664-8

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  • DOI: https://doi.org/10.1007/s12517-014-1664-8

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