Abstract:
This dissertation presents the Structural modelling and facies analysis using
spectral decomposition attribute of Sanghar area, Lower Indus basin, which is located
in the south western periphery of the Indian plate. 2D set of data including two strike
line, 7 dip lines and 1 well log data from Bobi-01 were used. The key objective of this
project is to delineate the subsurface geometry with the help of advance seismic
techniques such as spectral decomposition and other seismic attributes in order to
understand the petroleum system of the concerned area. Facies analysis is carried out
to understand the lithological variations and stacking patterns inside the Lower Goru
Formation. Main emphasize is on the interpretation methodology adopted in order to
illustrate the horizons and faults. Both the time and depth structure maps depict the
faults and tectonic style. As the study area tectonically present in extensional
tectonics, accordingly dominated by tilted normal faults and these are responsible for
horst and graben structures. From the seismic attributes the stratigraphic features are
enhanced. Geological chances of success (GCOS) is carried out to satisfy the
elements of petroleum play and 2 zones have 21% and 20.7%, respectively.
Volumetric estimation is carried out to calculate the amount of reserves present in the
area and reserves recoverable at 70% has 19.6 BCF for the Lower Goru Formation.
To check the credibility of the prospect, economic analysis is carried out and the net
pay value is calculated as 540.95 billion dollars.
