Method of correlating a core sample with its original position in a borehole

Patent · Tue Sep 24 00:00:00 EDT 1985

OSTI ID:5699927

Vinegar, H J; Wellington, S L

A method of correlating a core sample with its original position in a borehole. The borehole is logged to determine the bulk density of the formation surrounding the borehole. The core sample is scanned with a computerized axial tomographic scanner (CAT) to determine the attenuation coefficients at a plurality of points in a plurality of cross sections along the core sample. The bulk density log is then compared with the attenuation coefficients to determine the position to which the core sample correlates in the borehole. Alternatively, the borehole can be logged to determine the photoelectric absorption of the formation surrounding the borehole, and this log can be compared with data derived from scanning the core sample with a CAT at two different energy levels.

• Assignee: Shell Oil Company
• Patent Number(s): US 4542648
• OSTI ID: 5699927
• Resource Relation: Patent File Date: Filed date 29 Dec 1983; Other Information: PAT-APPL-566611
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
03 NATURAL GAS
DRILL CORES
CAT SCANNING
NATURAL GAS WELLS
GAMMA-GAMMA LOGGING
OIL WELLS
CORRELATIONS
ENERGY LEVELS
POSITIONING
COMPUTERIZED TOMOGRAPHY
DIAGNOSTIC TECHNIQUES
RADIOACTIVITY LOGGING
TOMOGRAPHY
WELL LOGGING
WELLS
020300* - Petroleum- Drilling & Production
030300 - Natural Gas- Drilling
Production
& Processing