Abstract:
For evaluation of hydrocarbon potential in Ziarat area that lies in middle Indus basin
this research is carried out. Ziarat is situated in western side of the Sulaiman Fold and
Thrust Belt, east of Quetta Syntaxis The nearest town in the study area is Khost. Ziarat-1
was drilled in 2005 and was a commercial gas discovery from Chiltan Limestone, which
encouraged exploration activities targeting deeper horizons for delineation of potential
leads for prospects. The present study is conducted based on seismic and well data to
achieve the aim of structural interpretation, petrophysical analysis along with seismic
attributes and inversion. Assigned data was 2D seismic data that contains five seismic dip
lines that are oriented in NS direction and two strike lines oriented in EW direction along
with well log data. Seismic data was utilized for marking the horizons, three horizons are
marked (Dungan Limestone, Goru and Chiltan horizons), and the type of structural trap are
delineated. The structure has been interpreted is pop up structure. Chiltan (Jurassic) and
Dungan Formation (Paleocene) are the primary reservoirs in this area but due to very low
porosities they cannot be considered as a good reservoir. Seismic attributes have useful
results, to recognize major lithological discontinuities, energy response and faults. Seismic
inversion suggests that lithology of Dungan formation is limestone and impedance contrast
variations suggests that there is a lithological change. Petrophysical analysis showed that
Dungan formation have secondary porosity and tight reservoir conditions, but it is not of
potentially sound enough to produce commercially hydrocarbons.
