Heuristic stratigraphic prediction

[fraserkeppie]

Brief Description:

Given an incomplete strip log (i.e., with descriptions missing for different intervals and/or below the deepest description), fill in the blanks with predicted descriptions or lithology classification. The idea is that one or more nearby wells or surface sections would have complete descriptions for the relevant stratigraphic intervals from which a heuristic algorithm could fill in the blanks of the incomplete strip log. Or, generic descriptions of stratigraphic content could be referenced to fill in the blanks. Or, solid rock fill in the blanks could be used as a default. The striplog with original and predicted components should have an attribute that indicates whether the lithology components are original or predicted.

Actors:

users of this workflow want to predict geology in different locations and depths based on nearby or reference rock characterizations from other wells or geological information.

Preconditions:

can assume that complete stratigraphic logs from nearby wells and/or reference stratigraphy descriptions exist; can assume that the incomplete stratigraphic log exists as well.

Alternate Flows:

predictions of rock type could be generated from petrophysical logs where available

Exception Flows:

?

Post-conditions:

the filled striplog should be returned with an associated attribute indicating which intervals have an original designation and which were predicted (and, if predicted, from which source and algorithm).