Abstract
Laboratory results of total porosity and physical permeability were the basis to calculate Flow Zone Indicator and GR log and porosity log were used for facies identification in the Miocene sandy-shaly sediments in two wells in the Eastern Part of Polish Carpathian Foredeep. There was observed FZI increase with the total porosity from the comprehensive interpretation of logs in the regressive set of parasequences what can be interpreted as better reservoir and hydraulic abilities of them in comparison to transgressive ones. Combining laboratory origin information with well logging results on the basis of facies and FZI correlation worked also as a kind of data scaling.
Highlights
The study was undertaken to show a relationship which exist between facies, depositional environment and reservoir properties
Facies and depositional environment determination are the fundamental work carried out when clastic reservoir are studied for the purposes of hydrocarbon exploration and development
The occurrence of reservoir quality strata in different rock types is related to the distribution of rock facies which in turn reflects the environment of deposition
Summary
The study was undertaken to show a relationship which exist between facies, depositional environment and reservoir properties. This relationship can be determined accurately from analysis of well logs (Basham & Dorfam 1983). Facies and depositional environment determination are the fundamental work carried out when clastic reservoir are studied for the purposes of hydrocarbon exploration and development. The occurrence of reservoir quality strata in different rock types is related to the distribution of rock facies which in turn reflects the environment of deposition. Depositional facies distribution is determined from geologic analysis of laboratory and well logging data (Samadi et al 2006, Bingjian et al 2011). The presented case study was aimed to show that in monotonous sandy-shaly thin-bedded Miocene formation combination of reservoir properties with facies distribution can be helpful in prospecting small gas accumulations
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