WellCAD Basics - Advanced Logic Technology

498 - APPENDIX C
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TVD(T, unit) Returns True Vertical Depth
derived from tilt (T) in units (1
= metre, 0.3048 = feet)
Logical functions:
If(A,B,C) If A is true then take B else take
C.
TVD({Tilt}, 0.3048)
If({DEPTH}>=100,{GR},
NULL)
AND(A,B) Returns true if A and B are true. AND({C1}>5, {P1AZ}> 90
)
OR(A,B) Returns true if A or B is true. OR({C1}>5, {C2}>5)
NOT(A) Returns true if A is false and
vice versa.
NOT({C1}5,FALSE)
TRUE Returns the logical value True. AND({C1}>5,TRUE)
Statistical functions, which apply to the entire log:
Ave Average value of log Ave ({GR})
StdDev Standard deviation of log StdDev ({GR})
Min Minimum value of log Min ({GR})
Min2( , ) Returns the minimum of both
arguments
Min (75, {GR})
Max Maximum value of log Max ({GR})
Max2( , ) Returns the maximum of both
arguments
Max (75, {GR})
All the above items can be combined in a complex multi-level formula.