Global Net-to-Gross Uncertainty Assessment at Early Appraisal Stage: Application To Stanford VI Reservoir
Amisha Maharaja. ( 2005 )
in: 25th gOcad Meeting, ASGA
Abstract
Scarce and preferentially located well data at early appraisal stage of a reservoir tend to give an upwardly biased estimate of Net-to-Gross (NTG). Seismic data provide the most extensive coverage of the reservoir which helps to correct the biased estimate, but they need to be calibrated with well data. A Bayesian approach is used to calibrate acoustic impedance with core facies data in the synthetic Stanford VI reservoir. Such a calibration calls for a prior probability of NTG, which itself is highly uncertain and therefore treated as a random variable. Multiple-point sequential simulation honoring all available data is used to obtain multiple equi-probable realizations of the reservoir. Spatial bootstrap done on the realizations is used to obtain uncertainty about the NTG estimate.
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BibTeX Reference
@inproceedings{MaharajaRM2005, abstract = { Scarce and preferentially located well data at early appraisal stage of a reservoir tend to give an upwardly biased estimate of Net-to-Gross (NTG). Seismic data provide the most extensive coverage of the reservoir which helps to correct the biased estimate, but they need to be calibrated with well data. A Bayesian approach is used to calibrate acoustic impedance with core facies data in the synthetic Stanford VI reservoir. Such a calibration calls for a prior probability of NTG, which itself is highly uncertain and therefore treated as a random variable. Multiple-point sequential simulation honoring all available data is used to obtain multiple equi-probable realizations of the reservoir. Spatial bootstrap done on the realizations is used to obtain uncertainty about the NTG estimate. }, author = { Maharaja, Amisha }, booktitle = { 25th gOcad Meeting }, month = { "june" }, publisher = { ASGA }, title = { Global Net-to-Gross Uncertainty Assessment at Early Appraisal Stage: Application To Stanford VI Reservoir }, year = { 2005 } }