Therefore, in the present study an attempt is made to estimate the permeability from well log and core data using Buckles’ method approach in Langpar and Lakadong + Therria sanstone reservoir of Eocene–Paleocene geologic age in the field under the assumption and geological support that reservoirs in the study area are clean sand having very less shale control and are homogenous reservoir with little/no heterogeneity. In study area, the Chandmari field of upper Assam-Arakan basin with the availability of only seven core samples and conventional logs such as density, porosity, resistivity and gamma ray data from few wells, the estimation of permeability becomes a difficult task. However, when few core samples are available to calculate the permeability in the field, estimation of permeability becomes a challenging task. Formation permeability is often measured in the laboratory test using core samples. Permeability is an important petrophysical parameter of hydrocarbon reservoirs for oil and gas production.
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