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Stratigraphic interpretation using formation imaging and dipmeter analyses

Conference ·
OSTI ID:7077016
; ;
Successful stratigraphic interpretation depends on the analysis of several parameters. For many years, the dipmeter has been the key logging tool in stratigraphic interpretation. However, the nature of the measurement (four to eight microresistivity curves from four pads) placed some limits on a detailed interpretation beyond the wellbore. The recent development of 54 clustered microresistivity curves from two of the four dipmeter pads now provides two continuous side-by-side images oriented at 90/sup 0/ to each other. In an 8-in. hole, for example, the images cover 22% of the sedimentary formation exposed in the wellbore. The image characterize stratigraphic discontinuities (unconformities, erosional contacts), bedding thickness (thick bedded to laminated) and types (flaser, graded), sedimentary structures (crossbedding, bioturbation, deformational), and rock textures (conglomerates, breccias, shaly sandstones). Images of these oriented sedimentary features, in combination with conventional dipmeter interpretation, define the stratigraphic units and the reservoir geometry beyond the wellbore. Two case studies, including whole core analyses, are used to demonstrate the synergism between formation imaging and dipmeter interpretation.
Research Organization:
Schlumberger Well Services
OSTI ID:
7077016
Report Number(s):
CONF-861080-
Country of Publication:
United States
Language:
English

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Related Subjects

02 PETROLEUM
020200* -- Petroleum-- Reserves
Geology
& Exploration
03 NATURAL GAS
030200 -- Natural Gas-- Reserves
Geology
& Exploration
DEFORMATION
DIMENSIONS
DIPMETER LOGGING
EQUIPMENT
GEOLOGIC DEPOSITS
GEOLOGY
GEOMETRY
GEOPHYSICS
IMAGE PROCESSING
IMAGES
MATHEMATICS
MINERAL RESOURCES
NATURAL GAS DEPOSITS
PETROLEUM DEPOSITS
PROCESSING
RESERVOIR ROCK
RESOURCES
ROCKS
SANDSTONES
SEDIMENTARY ROCKS
SHALES
STRATIGRAPHY
THICKNESS
WELL LOGGING
WELL LOGGING EQUIPMENT