Published June 23, 1981 | Version v1
Patent Metadata-only

Earth formation porosity log using measurement of fast neutron energy spectrum

Creators

Description

A method and apparatus for measuring the porosity of earth formations in situ in a borehole is provided. A relatively high intensity continuous or pulsed neutron source irradiates the formation surrounding a borehole with fast neutrons. A pair of detectors, one sensitive to epithermal neutrons and the other sensitive to fast neutrons or to the consequent inelastic gamma rays, each spaced approximately the same distance from the neutron source, generate signals which may be interpreted in terms of the earth formation porosity in accordance with predetermined relationships

Availability note (English)

Available from Micromedia Ltd., 165 Hotel de Ville, Hull, Quebec, Canada J8X 3X2.

Additional details

Publishing Information

Imprint Pagination
39 p.
IPC:
Int. Cl. G01v5/00.
IPC
Int. Cl. G01v5/00.
Patent number
CA patent document 1103814/A/

INIS

Country of Publication
Canada
Country of Input or Organization
Canada
INIS RN
13702388
Subject category
S58: GEOSCIENCES;
Resource subtype / Literary indicator
Non-conventional Literature
Descriptors DEI
BOREHOLES; EPITHERMAL NEUTRONS; FAST NEUTRONS; NEUTRON-GAMMA LOGGING; NEUTRON-NEUTRON LOGGING; POROSITY; WELL LOGGING EQUIPMENT
Descriptors DEC
BARYONS; CAVITIES; ELEMENTARY PARTICLES; FERMIONS; HADRONS; NEUTRON LOGGING; NEUTRONS; NUCLEONS; RADIOACTIVITY LOGGING; WELL LOGGING

Optional Information

Notes
U.S. pat. appl. 789057, 789058, 789059 (20 Apr 1977).