Published April 19, 1973 | Version v1
Patent Metadata-only

Dual-spaced epithermal neutron detector porosity logging

Creators

Description

A method is described for measuring the porosity of earth formations in the vicinity of a well borehole comprising the steps of: 1) irradiating the earth formations in the vicinity of the borehole with fast neutrons from a relatively high intensity neutron source; 2) detecting the epithermal neutron populations at different first and second distances from the source in the borehole; and 3) combining the epithermal neutron population measurements made at the two different distances to derive an indication of formation porosity. (author)

Availability note (English)

Available from the Commissioner of Patents, Canberra.

Additional details

Publishing Information

Imprint Pagination
20 p.
IPC:
Nat. Cl. 85.22.
IPC
Nat. Cl. 85.22.
Patent number
AU patent document 73/54795/A/

INIS

Country of Publication
Australia
Country of Input or Organization
Australia
INIS RN
6198974
Subject category
S46: INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY;
Resource subtype / Literary indicator
Non-conventional Literature
Descriptors DEI
BOREHOLES; EPITHERMAL NEUTRONS; GEOLOGIC DEPOSITS; NEUTRON DETECTORS; NEUTRON RADIOGRAPHY; NEUTRON SOURCES; POROSIMETERS; WELL LOGGING
Descriptors DEC
BARYONS; CAVITIES; ELEMENTARY PARTICLES; FERMIONS; HADRONS; INDUSTRIAL RADIOGRAPHY; MATERIALS TESTING; MEASURING INSTRUMENTS; NEUTRONS; NONDESTRUCTIVE TESTING; NUCLEONS; PARTICLE SOURCES; RADIATION DETECTORS; RADIATION SOURCES; TESTING

Optional Information

Notes
Open to public inspection 24 Oct 1974, priority USA 17 May 1972, copies available from the Commissioner of Patents, Canberra.