Well logging: utilizing superposition of step-profile responses

Details Well logging: utilizing superposition of step-profile responses Well logging: utilizing superposition of step-profile responses

1981-12-22

1984-11-20

Krass, Errol A.

Boots, shoes, and leggings

73152, 324323, 324339, E21B 4900, G06F 1520

Patent

active

044842783

ABSTRACT:
Disclosed is a method of improving well logs, such as induction logs and laterologs, by taking into account the effect on a log measurement both of the particular bed in which it is taken and of one or more other beds. In one example the process starts with an original induction log and a provisional layered formation which is based thereon and is characterized by bed boundaries and constant induction log levels within a bed. A provisional reconstructed log is built up by applying the tool response to the layered formation by a new technique which makes this expedient enough to be practicable. The reconstructed log is matched against the original log, and the layered formation is refined accordingly, by adding and/or shifting boundaries and/or by changing the measurement levels within beds, until the match is satisfactory. The original log is then converted to an improved log on the basis of the latest layered formation. Modifications include use of laterolog measurements to improve laterologs and to improve induction logs.

REFERENCES:
patent: 3946604 (1976-03-01), Anderson
patent: 4297879 (1981-11-01), Howells et al.
patent: 4313164 (1982-01-01), Regat
patent: 4314338 (1982-02-01), Suau et al.
patent: 4346593 (1982-08-01), Howells et al.
patent: 4350979 (1982-09-01), Eberwein

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