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Geomodelling workflow for the study


Te produced model could explicitly describe the crucial changes in geometry of the facies, which potentially is of great importance for future drilling campaigns within the modelled zone. Fan shaped deposits were present on the Layer-5,


especially on the Southwest and Central Northeast part of the model.


Te facies model has been tested with


the available gas-water contact (GWC) of studied zone, hence it paves the way for higher probability of development for


particular facies proportions above the GWC level (-3,050m SSTVD). Based on the execution of all the major


interpretational modules of DSSB’s algorithm, depositional facies are genetically cleaner and are above the GWC. Te spatial distribution of the potential seismically derived sand facies is interpreted. Te overall interpretation of the different probabilities of sand occurrence within the model states that P50 (probability of occurrence) and P60 sands have higher percentage of occurrence within the middle layers (k=7 to k=13) whereas the probability of occurrence of P70 and P80 sands is from k=1 to k=13 layers of the model. P90 sands are assumed to be found within k=9 to k-19 layers within the model. Tis advanced geomodelling technique equipped with the facies paleo-trend modelling is tested on several prominent hydrocarbon fields/prospects in Asia Pacific, showing immense potential in resolving complex depositional facies interpretations with substantially improved outcomes.


Seismic facies occurrence in different layers within the model 10 www.engineerlive.com


Dr AKM Eahsanul Haque is technical director of Dimension Strata www.dimensionstrata.com


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