Reservoir characterisation of Meyal-8, Meyal-9, and Meyal-10 by well log data, southern Potwar, upper Indus Basin, Pakistan

The Meyal oil field is a significant oil field in the Potwar Basin, Punjab, Pakistan. This study deals with the petrophysical analysis of the Meyal-08, Meyal-09, and Meyal-10 wells to identify suitable reservoir zones with the help of well log data. Rock physics modelling allowed quantitative prediction of the relationship between porosity, saturation, shale volume, and elastic properties. The Chorgali Formation (Eocene) is the main reservoir of the Meyal oil field. Three suitable zones of interest have been marked: zone-1 of Meyal-08 with a shale volume of 3.1%, average porosity of 32.09%, effective porosity of 31.11%, water saturation of 79.21%, average hydrocarbon saturation of 20.79%, and net pay of 53.1%; zone-1 of Meyal-09 with a shale volume of 53.79%, average porosity of 20.55%, effective porosity of 7.20%, water saturation of 44.44%, average hydrocarbon saturation of 55.56%, and net pay of 9.4%; and zone-1 of Meyal-10 with a shale volume of 21.8%, average porosity of 19.1%, effective porosity of 14.68%, water saturation of 43%, hydrocarbon saturation of 57%, and net pay of 5%. Based on all these characteristics the Meyal field results to be a very significant field for the economical production of hydrocarbon in the Potwar area.