The permeability is an important and primary rock property to access the fluid movement within the reservoir. 2012 Singha and Chatterjee 2014 Chatterjee and Mukhopadhyay 2002). Basic reservoir properties such as porosity, permeability and hydrocarbon saturation are directly linked to the storage capacity, fluid flow capacity, type of rock and amount of hydrocarbon in pore volume, respectively (Verma et al. The permeability estimation relationship can further be used for the estimation of permeability in the inter-well region of Chandmari oil field.Īn oil/gas reservoir is a heterogeneous geological structure having large inherent complexity properties (Verma et al. The estimated permeability results suggest that the oil reservoir has the higher permeability than the gas reservoir. The estimated permeability in the reservoirs using Buckles’ method ranging from 1500 to 4554.38 mD is well matched with the permeability estimated from core sample. The estimated irreducible water saturation which is an essential parameter for water cut and permeability estimation is used for estimating the permeability in the field. The relationship between porosity and water saturation which is required to distinguish mobile from capillary bound water or irreducible water saturation is used to estimate the irreducible water saturation. In this study, petrophysical evaluation from log data and that from core data are integrated for the analysis of the reservoir characteristics.
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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