Investigation of Reservoir Quality of Sarvak Formation Using Well-Logging Data in an Oilfield in the Abadan Plain

Document Type : Review Paper

Authors
Arad Kiani 1
Mohammad Hossein Saberi 2
Bahman Zarenezhd 3
Elham Asadi Mehmandosti 4
Nasim Rahmani 5
1 M. Sc, Dept. of Petroleum Exploration, Faculty of Petroleum engineering, Semnan University, Semnan, Iran
2 Assistant Professor, Dept. of Petroleum Exploration, Faculty of Petroleum engineering, Semnan University, Semnan, Iran
3 Associate Professor, Petroleum and Gas, Faculty of Chemical Engineering, Semnan University, Semnan, Iran
4 Assistant Professor, Dept. of Geology, Faculty of Earth Sciences, Kharazmi University, Tehran, Iran
5 Petroleum Engineering and Development Company, Tehran, Iran
Abstract
Dated back to the Albian to the Turonian, Sarvak Formation serves as an important oil reservoir in the Zagros Basin. In this study, well-logging data was used as input for stochastic petrophysical evaluation by means of the Geolog software in an attempt to assess reservoir quality of the Sarvak Formation in an oilfield in the Abadan Plain, Iran. For this purpose, we studied the formation in terms of petrology, shale volume, porosity, water saturation, and net-to-gross pay ratio. Once finished with editing the well logs and applying the required corrections, the mentioned parameters were analyzed along the studied well. Based on the results of the evaluations, at this well, the Sarvak Formation was found to be composed of limestone and dolomite with varying amounts of shale interbeddings. Based on the petrophysical properties, the Sarvak Formation was divided into 13 zones, of which the Zones 1, 3, 4, 5, and 8 characterized a suitable reservoir in terms of saturation, porosity, petrology, and shale volume, with the Zone 8 exhibiting the best reservoir quality with a net-to-gross pay ratio of 98%.

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  • Receive Date 25 April 2022