Abstract:
This study is carried out to investigate the shale gas potential of Talhar shales on
the basis of seismic interpretation, TOC (Total organic content) analysis and
petrophysical analysis. Specific fault behavior and geometry is established on the basis
of 2D seismic data interpretation. The role of faults is significant in this area because the
structures are generally fault bounded with associated dip closures. As fault pattern (Horst
and graben structures) is bit simple in this area due to normal faulting in the area. The
fault and horizon interpretation process lead to the better understanding of the structural
geometry and its extents etc. This investigation incorporates conservative seismic
interpretation which involves the seismic to well tie followed by horizon tracking, fault
identification and marking. Different reservoir properties like porosity, water saturation,
hydrocarbon saturation, are computed from the merger of different wireline logs.
Consequences to the above shown processes lead to a better and more consistent
understanding of depositional and structural models. After the petrophysical evaluation
process, rock physics is carried out to better recognize the nature of lithology and fluid
present inside the Talhar shales and effect of fluids on the overall response of Formation.
Talhar shales in both wells proved to have hydrocarbon present in them on the basis of
rock physics analysis. Later on TOC (total organic content) analysis is done using
Passey’s updated method, which also errands the presence of fair to excellent organic
content in Talhar shales.
