Assessing Uncertainties with Simulations - Application to Volumetrics

3 days

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Price: 1650 € (Euros)
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OBJECTIVE

To provide participants with a sound understanding of the capabilities of the geostatistical approach, especially stochastic simulation, when characterising uncertainties in oil & gas volumetric estimates.

KEY FEATURES

Geostatistical simulation techniques are recommended for the calculation of GRV, HCPV and STOIIP / GIIP, rather than using an interpolation method such as kriging. The course emphasises the optimal use of wells and seismic data for generating a distribution of expected volumes and hydrocarbon reserves, rather than a single answer.

WHO SHOULD ATTEND

Geologists and geophysicists involved in development decisions and risk analysis of reservoir volumetric and reserve evaluation. A basic understanding of geostatistics is required (variograms & kriging).

COURSE CONTENT

Why use a geostatistical simulation method to compute hydrocarbon reserves, rather than use an interpolation method such as kriging?
General overview of geostatistical simulation methods.
Pros and cons of geostatistical simulation techniques: Turning Bands and Sequential Gaussian.
Integration of Seismic data during the simulation process: External Drift Simulation and Collocated Cosimulation.
Accounting for the uncertainty of the OW and GO contacts.
Determination of the spill point and its effect on the reservoir closure.
How to account for uncertainties in the reservoir size and in petrophysical properties.
Identification of optimistic, most - likely, and pessimistic scenarios.

Prior knowledge of basic geostatistic (variogram, kriging and cokriging) is recommended.

Half of the course is dedicated to a complete application on a real gas reservoir using Isatis.