Reservoir Characterization of Unconventional Conglomeratic Deposites of Olpad Formation, India Using Resistivity Spectrum Analysis

Olpad formation, Cambay Basin, India possess all sorts of character to be a potential conglomerate reservoir in India. Paleocene basal clastics of Olpad Formation in Cambay basin, India is best known for its polycyclic fluvio-deltaic conglomerate deposits in a syn-rift basin system. The open hole and FMI* data reveals Olpad as highly potential unconventional reservoir in Cambay Basin which deposited under a typical syn-tectonic set up through archaic process of geological basin evolution. Using the high resolution image log the sand proportions are separated out from clast and clays which resulted in precise matrix computation. Matrix is the main contributor to the reservoir quality. Thus taking the result of sand proportion as an input, saturation model can be optimized through a combined basic petrophysical logs and image log in a complex conglomeratic reservoir through elemental analysis method. This whole study put forth a unique approach towards the complex hydrocarbon-play generation, estimation of reservoir properties and further supply input to reservoir modeling and production. The saturation has increased in the conglomerate reservoir zone.