Prediction of porosity and water saturation using seismic inversion for Habib Rahi limestone, Mari Gas field, Central Indus Basin, Pakistan. | [Proceedings SPE-PAPG Annual Technical Conference • 2005]

Author(s):

1. Naseer Ahmad Mirza: LMK Resources, Islamabad, Pakistan

2. Mirza Naseer Ahmad: LMK Resources, Islamabad, Pakistan

3. Mohammad Saqib: LMK Resources, Islamabad, Pakistan

4. Farhana Ali: LMK Resources, Islamabad, Pakistan

5. Ali Farhana: LMK Resources, Islamabad, Pakistan

6. Hamid Mushtaq: Mari Gas Company Ltd, Islamabad, Pakistan

7. Tufail Khoso: Mari Gas Company Ltd, Islamabad, Pakistan

8. Farukh: Mari Gas Company Ltd, Islamabad, Pakistan

Abstract:

The main advantage of using seismic acoustic impedance for studying reservoir properties is that it can be used wherever seismic data exist, provided that well logs are available for calibration. In this article reservoir properties such as porosity and Sw of Habib Rahi limestone of Mari Gas field has been predicted using seismic inversion technique. Empirical relation was developed between acoustic impedance and porosity/Sw using well data. These relations were applied on average inverted impedance horizon of Habib Rahi unit to calculate distribution map of porosity and Sw over the extent of whole available seismic data. The porosity prediction is in good match with actual average log data of Habib Rahi limestone. The estimated Sw also highlights zones of high and low Sw. These results suggest that locally derived empirical functions between impedance and porosity/Sw can provide cost effective estimates of porosity and Sw distribution for carbonates of Indus Basin.

Page(s): 169-177

DOI: DOI not available

Published: Journal: Proceedings SPE-PAPG Annual Technical Conference, Volume: 0, Issue: 0, Year: 2005

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