US Patent 8000899 Borehole invariant porosity measurement method

Patent 8000899 was granted and assigned to Schlumberger on August, 2011 by the United States Patent and Trademark Office.

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Is a

Patent

Patent attributes

Current Assignee

Schlumberger

Patent Jurisdiction

United States Patent and Trademark Office

Patent Number

8000899

Date of Patent

August 16, 2011

Patent Application Number

11340054

Date Filed

January 26, 2006

Patent Primary Examiner

‌

Manuel L. Barbee

Patent abstract

The invention concerns a method for determining the porosity of an earth formation penetrated by a borehole. The method comprises conveying a tool along said borehole, wherein the tool comprises a source of neutron radiation and at least two detectors axially spaced from said source at at least two different spacings. At least one near detector and at least one far detector are selected and a correction computed. The porosity of the earth formation is determined by correcting the far detector porosity with the computed correction.