Seismic Lithofacies for Static Model Building and STOIIP Calculation in Bioturbated Shallow Marine Environments
- Saira Bannu Baharuddin (Petroliam Nasional Berhad, PETRONAS) | Hani Abul Khair (Petroliam Nasional Berhad, PETRONAS) | Reza Amarullah Bekti (CGG) | Amita Mohd Ali (Petroliam Nasional Berhad, PETRONAS) | Budi Kantaatmadja (Petroliam Nasional Berhad, PETRONAS) | Mohd Rapi Muhammad Som (Petroliam Nasional Berhad, PETRONAS) | Faizal Sedaralit (Petroliam Nasional Berhad, PETRONAS)
- Document ID
- Society of Petroleum Engineers
- SPE Annual Technical Conference and Exhibition, 24-26 September, Dallas, Texas, USA
- Publication Date
- Document Type
- Conference Paper
- 2018. Society of Petroleum Engineers
- 2.2 Installation and Completion Operations, 5.1.8 Seismic Modelling, 2 Well completion, 1.6 Drilling Operations, 5.5.2 Core Analysis, 1.6.9 Coring, Fishing, 5 Reservoir Desciption & Dynamics, 2.1.3 Completion Equipment, 2.2.2 Perforating, 1.2.3 Rock properties, 5.6 Formation Evaluation & Management
- Shallow Marine, Bioturbation, Lithofacies, Inversion, Seismic
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- 157 since 2007
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Bioturbated zones are frequently bypassed by oil and gas operating companies during perforation due to the perception that they are non-productive. We analysed data from wells in four fields in the Sarawak Basin, Malaysia, for selected bioturbated zones. The study included thin section, probe-permeameter, petrophysical, and routine core analysis. A bioturbation index classification scheme was established to allow semi-quantitative ranking for each foot of core.
In the current study, we introduce a simulation script to predict lithofacies types at well locations based on input from bioturbation intensity algorithm (Ali et al., 2016), this script can be used for application on shallow marine field within Malaysia.
We also used post stack seismic inversion for acoustic impedance and it proved to be a key approach to enhance the ability of predicting rock properties between wells. We generated a seismic derived lithofacies which provided the best estimate of lithofacies distribution between wells even though a well derived lithofacies had higher resolution. We calculated STOIIP using input from seismic lithofacies and porosity, and the results showed more accurate estimate of hydrocarbon in place compared with statistical approaches. Thus, the current seismic lithofacies methodology can be used for static model building and STOIIP calculation in shallow marine environments.
|File Size||2 MB||Number of Pages||10|
Gingras, M.K., Pemberton, S.G., Henk, F., MacEachern, J.A., Mendoza, C.A., Rostron, B., O'Hare, R., Spila, M., Konhauser, K., 2007. Applications of ichnology to fluid and gas production in hydrocarbon reservoirs. In: MacEachern, J.A., Bann, K.L., Gingras, M.K., Pemberton, S.G. (Eds.), Applied Ichnology: SEPM Short Course Notes, vol. 52. Society for Sedimentary Geology, pp. 129e143.