DETERMINING THERMAL NEUTRON POROSITY FROM NEUTRON-SLOWING DOWN LENGTH, FORMATION THERMAL NEUTRON CAPTURE CROSS SECTION AND BULK DENSITY Russian patent published in 2013 - IPC G01V5/10

Abstract RU 2475783 C2

FIELD: physics.

SUBSTANCE: in order to determine at least one formation property calculated from neutron measurements obtained using a downhole tool, the following operations are performed: emitting neutrons from a source in the tool into the formation; detecting neutrons with at least one detector in the downhole tool; calculating a first slowing-down length (L₁) based on the neutron detection results; and deriving a second slowing-down length (L₂) based on the first slowing-down length (L₁).

EFFECT: highly accurate estimation of porous space using a neutron logging tool with an electron source.

18 cl, 8 dwg

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RU 2 475 783 C2

Authors

Frike Skott Kh.

Adol'F Robert A.

Ehvans Majk

Dates

2013-02-20—Published

2008-08-13—Filed