Building 2-D stratigraphic and structure models from well log data and control horizons

An algorithm to build a gridded 2-D seismic velocity (or any other physical property) model from well log data and control horizons is developed. Interpolation of well log data onto a 2-D grid uses inverse distance weighting or linear interpolation, guided by the shape of the control horizons that a...

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Bibliographic Details
Published inComputers & geosciences Vol. 29; no. 5; pp. 557 - 567
Main Authors Patel, Maulin D., McMechan, George A.
Format Journal Article
LanguageEnglish
Published Oxford Elsevier Ltd 01.06.2003
Elsevier Science
Subjects
Applied geophysics
Earth sciences
Earth, ocean, space
Exact sciences and technology
Internal geophysics
Model building
Stratigraphic interpolation
Stratigraphy
Structural control
Well log interpolation
North Carolina
Canada
United States
North Atlantic
South Carolina
Northwest Atlantic
Eastern Canada
Well log interpolation
Model building
Stratigraphic interpolation
Structural control
algorithms
Atlantic Ocean
data processing
well logs
North America
offshore
seismic methods
extrapolation
interpolation
acoustical impedance
two-dimensional models
stratigraphic controls
computers
electrical resistivity
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Summary:An algorithm to build a gridded 2-D seismic velocity (or any other physical property) model from well log data and control horizons is developed. Interpolation of well log data onto a 2-D grid uses inverse distance weighting or linear interpolation, guided by the shape of the control horizons that are predefined from seismic or other 2-D constraints. A key feature of the models is that they may contain layers that are truncated by unconformities or at faults, or that lap out smoothly at their tops and bottoms. Abrupt or smooth terminations are controlled by user flags. Applications are illustrated using resistivity and acoustic impedance log data from the Blake Ridge (offshore Carolina) and using a complex structure produced by overthrust tectonics in western Canada. Geologically reasonable models can be produced only if there are sufficient wells to sample every salient element in the model and sufficient control horizons to define the lateral character of the structures at the required level of detail.
ISSN:0098-3004
1873-7803
DOI:10.1016/S0098-3004(03)00039-6