Petrophysical Parameters and Reservoir Evaluation from Well Log Analysis of Lam Member (Late Jurassic), Habban Oil Field, Marib-Shabwah (Sab'atayn) Basin, Yemen

Document Type : Regular Articles

Authors

1 Geology Department, Faculty of Science, Sohag University, Sohag 82524, Egypt.

2 Faculty of Geography and Geology, Institute of Geological Sciences, (Uniwersytet Jagielloński) Jagiellonian University in Krakow,31007, Poland. (Uniwersytet Jagielloński) Jagiellonian University in Krakow, Poland.

3 Department of Oil and Gas Engineering, Faculty of Oil and Minerals, Shabwah University, Shabwah, Yemen.

4 Faculty of Geography and Geology, Institute of Geological Sciences, (Uniwersytet Jagielloński) Jagiellonian University in Krakow,31007, Poland.

Abstract

The present work aims to quantify the petrophysical parameters including shale content, effective porosity, and fluid saturations of the Late Jurassic Lam Member in the Habban oil field, Marib Shabwah Basin, Yemen, and also, to define the distribution and lateral connectivity of reservoir rocks which are frequently marked by severe lithological variation.  The open-hole well log data from selected 5 wells, namely Habban 1A, Habban 8, Habban 11, Habban 14, and Habban 25 are used through computer software. The results revealed that the Lam Member rocks consist of an interbedded sequence of carbonate (limestone and dolomite) and claystone with intercalated sandstone. They are encountered in the study area with a relatively high thickness reaching up to 498 m. These rocks have reasonable effective porosity (12.2%), low shale content (14.9%), and high hydrocarbon saturation (70%) with maximum pay thicknesses reaching 40 m; accordingly, they are promising for future hydrocarbon exploration.

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