Abstract:
Sawan gas field is located in Thar platform, eastern part of the lower Indus
basin. It is considered one of the largest gas field of Pakistan with an expected
ultimate recovery of more than 1 trillion cubic feet.
Petrophysics is relatively younger subject in the domain of geology, which is
the study of the physical and chemical properties of rocks for the exploration of
reservoirs of resources, including ore deposits and oil or natural gas reservoirs. This
project involves the evaluation of the petrophysical characteristics and depositional
environment of two of the Sawan wells namely, Sawan 8 and Sawan 9. This includes
first the evaluation of the petrophysical characteristics which includes the
determination of volume of shale, lithology, porosity, permeability, saturation of
water, saturation of hydrocarbon, saturation of flushed zone, movable hydrocarbons,
bulk volume of water, pore volume of hydrocarbon and finally the net pay thickness
was calculated by using different techniques. After this, the depositional environment
was determined with the help of GR log which came out to be shallow to deep marine
environment.
The petrophysical interpretation shows that both the wells have the potential
to produce the hydrocarbon economically.
