Institut Francais Du Pe'trole

Joêlle Behot

Roland Lenormand

Patrick Egermann

Method and device for determining the formation factor of underground zones from drill cuttings. The device comprises a cell () associated with a device for measuring the electrical conductivity of the cell with the content thereof. The cell containing the drill cuttings is filled with a first electrolyte solution (A) of known conductivity (&#x3c3;). After saturation of the drill cuttings by first solution (A), the global electrical conductivity (&#x3c3;*) of the cell with the content thereof is determined. After discharging first solution (A), the cell containing the drill cuttings is filled with a second electrolyte solution (B) of known conductivity (&#x3c3;), and the global electrical conductivity (&#x3c3;*) of the cell containing the second solution and the cuttings saturated with the first solution is determined. The cuttings formation factor (FF) is deduced therefrom by combination of the measurements.

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Condecourt, France

Joêlle Behot