Abstract
Unconventional reservoirs mostly consist of fine-grained wealthy with organic shales trapped gas are considered as source, seal, and the reservoir rock. Integration of well logs played an important contribution in evaluation of unconventional reservoirs in order to identify the shale deposited basinward on the basis of their position in Basin, Total Organic Contents (T.O.C), mineralogical composition and reservoir parameters like porosity, saturation, fracture, brittleness, etc. required for optimizing recovery and production of hydrocarbons by integrating of seismic and petrophysical attributes. Seismic data is also used to map the shale gas away from well and identify its distribution with in the basin. In this regard, Passey’s method has been used for the identification of T.O.C contents in shale, commonly known as ΔlogR Method used for assessment of shale gas and depends upon cross plot Gamma Ray (GR), Density (DT) and LLD logs. Using cross plots of GR, DT and LLD Zone with high organic matter (OM) has been identified and integrated with results of petrophysical interpretation of Log to identify Shale Gas of producing fields of Sinjoro Blok, Lower Indus Basin of Pakistan.