Please recommend materials that may help. Plausible explanations are also highly appreciated.
Thanks
Dear Abubakar: I send you a couple of publications of interest from your inquiry. I understand that your question is related with Seismic Reservoir Characterization, in focus with prestack simultaneously inversion.
Best wishes, Mario E. Sigismondi
First, you need to understand your uncertainties. They can come from the structural model, the petrophysical model, the fluid model and the well bore model.
The structural model uncertainties come from seismic interpretation uncertainties, the time to depth conversion uncertainties.
The petrophysical model uncertainties come from the conversion of the wire logs to the petrophysical facies (shale, sand, shaly-sand, etc.) , gamma ray, porosity logs. etc. The other petrophysical model uncertainties come from the geostatistical uncertainties themselves, i.e. what is the uncertainty on the variogram model, on the facies proportion, on the correlation between porosity and permeability, what is the algorithm used to model facies and then rock properties inside the different facies, etc.
The fluid model uncertainties come from your initial pressure, saturation measurements, the gas-oil-water contacts geometries (fault sealing or not sealing) which drive your initial saturations, etc.
The well bore model uncertainties come from the evaluation of parameters such as skin factor. The last uncertainty is on the well placements themselves, i.e. what is the location of the injectors, producers, etc.
Once you have understood your uncertainties you need to choose a sampling method to sample this huge space as the relation is non-linear between any of these parameters and the recoverable oil volume.
There is a lot of software vendor based literature on this subject.
https://books.google.iq/books?id=HizeDwAAQBAJ&pg=PA44&lpg=PA44&dq=Quantify+and+reduce+uncertainties+in+earth+fluid+models&source=bl&ots=s9uQidkwiC&sig=ACfU3U2NC6M27VhmXLbL6Vh7RCo0hC9eJg&hl=ar&sa=X&ved=2ahUKEwi0oujN-9vpAhXoQUEAHfnbB3MQ6AEwBXoECAoQAQ