Accuracy of shaly sand formation evaluation

Measuring and testing – Borehole or drilling – Fluid flow measuring or fluid analysis

Reexamination Certificate

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C073S152010, C073S152020, C073S152040

Reexamination Certificate

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10927974

ABSTRACT:
A novel process and methodology in deterministic formation evaluation is provided. The formation evaluation results can accurately quantify formation attributes, such as clay-volume, clay-bound-water, effective-porosity and water saturation in shaly sands. Total-porosity is determined using porosity-logs, such as density, neutron and sonic logs. After clay-volume and total-porosity are determined, sand volume (quartz, feldspar, mica . . . ) is the remaining part in the bulk formation evaluated, see FIG.5.

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