| 摘要 |
An improved well logging system and method is provided for deriving and visibly displaying a recordable representation of a comprehensive lithological profile of the earth materials traversed by a borehole. In a particular form of the invention, all logging measurements are derived in digital form and on the same depth-dependent bases, such that measurements taken during one trip through the borehole may be combined or processed with other logging measurements taken during a different trip through the same borehole of interest, such that all of the measurements may then be processed at one time to derive the various lithological indications sought to be provided. An improved monitoring system and technique is further provided, such that those logging measurements and lithological relationships of interest may also be correlatively displayed on a real-time basis with respect to at least some of the logging measurements from which they are derived. In a further feature, apparatus and methods are provided for generating visible representations of such lithological relationships in a manner and form such as to provide both qualitative and quantitative indications of various subsurface earth characteristics along a borehole of interest. More particularly, such indications may be in both a linear and in a non-linear or symbolic form, and may also be recordable for subsequent retrieval and examination.
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