Two detector pulse neutron logging porosity technique
Patent
·
OSTI ID:4153997
An illustrative embodiment of the invention discloses a technique for reducing the influence of borehole characteristics on earth formation porosity measurements. Measurements of this sort are accomplished with a borehole logging tool and comprises two neutron detectors spaced at different distances from a pulsed neutron generator. The thermal neutron decay time of the short-spaced detector identifies that portion of the time-dependent population that is most indicative of the formation porosity. Both detectors then register the portion of the neutron distribution so identified to produce two signals from which a ratio is computed that is related to the porosity of the formation. (auth)
- Research Organization:
- Originating Research Org. not identified
- NSA Number:
- NSA-33-003099
- Assignee:
- to Schlumberger Technology Corp.
- Patent Number(s):
- US 3621255
- OSTI ID:
- 4153997
- Country of Publication:
- United States
- Language:
- English
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