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Integrated 2d seismic interpretation of Missa Keswal area and petrophysical analysis of Missa Keswal well 03 in Potwar sub-basin, Gujar Khan, Punjab Province, Pakistan

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Author Affiliations

  • 1Center of Excellence in Mineralogy, University of Baluchistan, Quetta, Pakistan
  • 2Department of Geology, University of Baluchistan, Quetta, Pakistan
  • 3Institute of Geology, University of Azad Jammu and Kashmir, Muzaffarabad, Pakistan

Int. Res. J. Earth Sci., Volume 7, Issue (2), Pages 27-38, May,25 (2019)

Abstract

The 2D seismic and Petrophysical data were integrated to define the subsurface structural alignments and reservoir assets of Missa Keswal well-03. The research study was undertaken using the seismic lines, 994-GJN-09 and 994-GNA-12of Missa Keswal well-03. A synthetic seismogram was articulated to relay seismic and well data from a seismic section. The seismic to well tie has further ensured the fidelity of seismic maps. The 2D Seismic was utilized in horizons mapping and faults identification. The two horizons were figured out on time domain and later on depth domain by changing time grid to a depth function with the help of interval velocity. The seismic interpretations has discovered an anticlinal structure with both limbs dislocated by the two detachment faults headed towards each other from east to west in response to the compressional stresses in the area. The thickness of two horizons, the Chorgali and Sakesar Limestone Formations was gauged from the perceptible depth intervals at 1870 m to 1983 m in the well using Petrophysical interpretations beside the determination of environment of deposition, effective porosity, saturated contents of hydrocarbon and extent of pay zone. Study has revealed variable environments of deposition ranging from fluvial to marine for both Chorgali and Sakesar Limestone Formations. A high porosity, permeability and hydrocarbon saturation was encountered in the well. The pay zone was much thick in Sakesar Limestone Formation than Chorgali Formation. The 2d seismic data and Petrophysical parameters indicate that the Sakesar Limestone Formation can act as a reservoir.

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