Petrophysical corner - using digitizers with microcomputers for chart conversion in induction log corrections

Journal Article · Fri Dec 01 00:00:00 EST 1989 · Geobyte; (USA)

OSTI ID:6976751

Tsay, F S ^[1]

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1. Univ. of Alabama, Tuscaloosa (USA)

In multi-layer or multi-well log interpretation, complete induction log corrections may involve possible use of about 150 curves from more than 14 different correction charts depending on tool types, wellbore conditions, mud resistivities, and bed thickness. To solve this complex problem, a digitizer is used to convert these charts into digital files so that proper numerical methods can be used for numerical solutions. It has been found that proper combinations of least-squares curve fitting, numerical interpolations and multiple-files search routine have provided satisfactory results in computer-based induction log corrections. The computer program has been tested with more than 150 possible combinations of logging conditions and the result has shown that this approach can provide solutions as reliable as any careful engineering calculation.

• OSTI ID: 6976751
• Journal Information: Geobyte; (USA), Vol. 4:6; ISSN 0885-6362
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
99 GENERAL AND MISCELLANEOUS//MATHEMATICS, COMPUTING, AND INFORMATION SCIENCE
58 GEOSCIENCES
WELL LOGGING
COMPUTER CALCULATIONS
DATA ANALYSIS
DIGITIZERS
PERSONAL COMPUTERS
COMPUTERS
DIGITAL COMPUTERS
ELECTRONIC CIRCUITS
MICROCOMPUTERS
PULSE CIRCUITS
SIGNAL CONDITIONERS
020200* - Petroleum- Reserves
Geology
& Exploration
020300 - Petroleum- Drilling & Production
990200 - Mathematics & Computers
580000 - Geosciences