Notional Field Development Final Report - EBN

EBN Notional Field Development Plan
but the clay bound water porosity sections were very similar to the uphole organic shales we are
interested in. These lower sections will be mostly mechanically analogous because clay bound water
drives the majority of the mechanical properties in these types of shales. The synthetic curves
demonstrated good fidelity to the measured velocities over all ranges of porosity and lithology. we do
have a measured DTC across the organic shales of interest in the KWK-01 well that will also allow us to
quality check our synthetically derived DTC & DTS in that well.
Figure 3-3, WWS-02 Stimlog Analysis - Best Fit Synthetic DTC-DTS
3.1.3.2 Synthetic Neutron Calibration
The OTL-1 well had both a neutron & DTC available across the target zones, so that well was used to
baseline the calibration function. This may sound unorthodox, but the neutron and DTC both primarily
respond to all the water in any formation. The only place they might significantly diverge is in a partially
geopressured gas interval where the gas would make the DTC read higher and the neutron lower. In the
crossplot data below, it is easy to see that the central range of data is going to only support a synthetic
neutron with an accuracy of +/- .03 which is roughly a 10% swing in either direction. This will manifest
itself in a total porosity that is too high by the same amount before we correct for clay and calculate
kerogen volume.
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