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NET PAY Gaussian Method The optimum bandlimited Extended Elastic Impedance attribute for enhancing and isolating pay is derived and an amplitude map is extracted over the reservoir interval. When combined with the observed reservoir isochron map the amplitude can be detuned. A map of the Net Pay thickness can then be derived that is calibrated to the well data. The calibration process also gives a measurement of absolute error. Using an elastic impedance seismic volume (left) as input the Threshold method creates a volume of Net Pay (right). This Net Pay volume is useful as input to reservoir simulation and geovisualisation. The Gaussian method predicts the most likely Net Pay and probability of it’s existance. These results can be used directly in drill risk analysis. Probability of Net Pay with 50% confidence being between15-36 metres. De-Tuning Method Threshold Method Accurate Net Pay prediction from seismic elastic impedance data. Banchory Business Centre, Burn O’Bennie Road, Banchory AB31 5ZU, Scotland T: +44 1330 825505 F: +44 1330 820173 Crossweys, 28-30 High Street, Guildford, Surrey GU1 3EL, England, UK T: +44 1483 243430 F: +44 1483 243432 www.seismicimageprocessing.com

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Page 1: NET PAY - Seismic Image Processing: Premier Supplier of

NET PAY

Gaussian Method

The optimum bandlimited Extended Elastic Impedance attribute for enhancing and isolating pay is derived and an amplitude map is extracted over the reservoir interval. When combined with the observed reservoir isochron map the amplitude can be detuned. A map of the Net Pay thickness can then be derived that is calibrated to the well data. The calibration process also gives a measurement of absolute error.

Using an elastic impedance seismic volume (left) as input the Threshold method creates a volume of Net Pay (right). This Net Pay volume is useful as input to reservoir simulation and geovisualisation.

The Gaussian method predicts the most likely Net Pay and probability of it’s existance. These results can be used directly in drill risk analysis.

Probability of Net Pay with 50% confidence being between15-36 metres.

De-Tuning Method

Threshold Method

Accurate Net Pay prediction from seismic elastic impedance data.

Banchory Business Centre, Burn O’Bennie Road, Banchory AB31 5ZU, ScotlandT: +44 1330 825505 F: +44 1330 820173

Crossweys, 28-30 High Street, Guildford, Surrey GU1 3EL, England, UKT: +44 1483 243430 F: +44 1483 243432 www.seismicimageprocessing.com