The effect of wellbore condition on wireline and MWD neutron density logs

Journal Article · Mon Mar 01 04:00:00 EST 1993 · SPE Formation Evaluation (Society of Petroleum Engineers); (United States)

DOI:https://doi.org/10.2118/20563-PA· OSTI ID:6164011

Allen, D F; Best, D L; Evans, M; Holenka, J M ^[1]

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1. Schlumberger, Houston, TX (United States)

The wellbore condition and its corresponding effect on log readings must be assessed and corrected during log quality control and formation evaluation. Differences arise between measurement-while-drilling (MWD) and wireline neutron density, photo-electric factor (PEF) logs made in the same well because the two systems respond differently to the wellbore environment. Differences also occur because of changes in wellbore condition over time.

• OSTI ID: 6164011
• Journal Information: SPE Formation Evaluation (Society of Petroleum Engineers); (United States), Journal Name: SPE Formation Evaluation (Society of Petroleum Engineers); (United States) Vol. 8:1; ISSN 0885-923X; ISSN SFEVEG
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020200* -- Petroleum-- Reserves
Geology
& Exploration
03 NATURAL GAS
030200 -- Natural Gas-- Reserves
Geology
& Exploration
COMPARATIVE EVALUATIONS
DATA ANALYSIS
DATA COVARIANCES
EVALUATION
MWD SYSTEMS
NATURAL GAS WELLS
NEUTRON LOGGING
OIL WELLS
RADIOACTIVITY LOGGING
WELL LOGGING
WELLS