Optimization of Core Sampling Program for Selected Sedimentology

The article is devoted to investigation of possibilities to optimize routine core laboratory analysis design according to the sedimentological characteristics of reservoir. The work is focused upon permeability measurements. Terrigenous rocks are within the scope of the study. As far as core sampling is concerned, a-priori assessment of necessary number of plugs to be taken is possible on the basis of earlier cored wells for formations deposited in sedimentary environments of which laterally continuous sandbodies are typical, such as, shallow marine alongshore sandbars and barrier islands, or submarine fan system deposits. Moreover, results of minipermeametry measurements may be utilized in order to distinguish so-called “homogeneously heterogeneous” intervals within the reservoir which require different sampling density for permeability characterization. Creation of an individual sub-program for each interval may allow increasing number of measurements within more heterogeneous parts of the reservoir by decreasing them within relatively homogeneous intervals without additional expenses on plug sampling. It is likely to allow more detailed assessment of permeability distribution within the reservoir, and, as a result, make help in reservoir management improvement.