Boots – shoes – and leggings
Patent
1974-05-01
1982-11-02
Atkinson, Charles E.
Boots, shoes, and leggings
33302, 33303, 324323, 324347, 364300, G01V 318
Patent
active
043576605
ABSTRACT:
Illustrative embodiments of the present invention include methods and apparatus for processing measurements indicative of the dip and azimuth of formation features at various depths in a borehole to produce three-dimensional representations of the formation features. These three-dimensional representations may be in the form of two-dimensional presentations of apparent dip traces for various depths in one or more planes. The apparent dips may be varied with distance from the borehole in accordance with information derived from dips above and below a selected dip. The three-dimensional representations may also take the form of a contour map of a formation surface around the borehold which represents a three-dimensional structural model derived from dips above and below the contoured formation surface.
Dip and azimuth variations over a given interval are used to define a family of surfaces in a three-dimensional reference system. Each dip represents a possible tangent plane to one of the surfaces at its intersection with the borehole. Dips are statistically analyzed to define a structural model, such as intersecting or faulted planes or cylindrical folds. Once a model is defined, the position of any surface in the model with direction and distance away from the borehole may be found and represented as variations in apparent dip in a given azimuth or as variations in dip or contour lines.
A statistical analysis of combined dip and azimuth variations determines a dominant mode for a dip distribution which corresponds to the structural dip for an automatically determined interval, even though the interval may also contain many dips corresponding to stratigraphic or depositional features.
REFERENCES:
patent: 3309607 (1967-03-01), Yungul
patent: 3466532 (1969-09-01), Kolb
Matthews et al., Supplementary Computer Programs for Dipmeter Analysis, 1965 PWLA Conference, pp. 1-19.
Atkinson Charles E.
Schlumberger Technology Corporation
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