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# background of lithoblending

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Hi!

I have one question. could you please explane to me how the lithoblending works? what is the theory of that algorithm? for example I am searching a simmilar explanation like it is here for kriging: http://www.nbb.cornell.edu/neurobio/land/oldstudentprojects/cs490-94to95/clang/kriging.html .

I would like to know a bit of background of this method.

and another question, for making a lithological model, are there avaible only lithoblending and closest point or can I use some other methods such as Kiriging or IDW?!

many thanks for the anwsers!

Greetings,

Dejan

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Hi Dejan,

Lithoblending is explained in the RockWorks help topic Horizontal Lithoblending Solid Modeling. To paraphrase the topic, lithoblending is a nearest neighbor algorithm with the search restricted to the horizontal XY plane surrounding the model node being calculated.

One way to use Inverse Distance or Kriging to calculate a lithology solid model, enter the data as percentages in the I-Data table.

Using the G value for the lithology does not work well with Inverse Distance or Kriging since the G value is a classification value, and intermediate values are not always meaningful. For example, if limestone is a 2, shale is a 4, and sandstone is a 6, and you have two wells with limestone (2) in one and sandstone (6) in the other, half-way between the two wells would calculate a value of (6+2)/2 = 4. In other words, half way between a sandstone and a limestone should not indicate that you have shale.

Thanks,

Tom B

RockWare Inc

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There's a good explanation with pictures in the help file. Search for "Horizontal Lithoblending" and select the "Horizontal Lithoblending Solid Modeling" topic. If that doesn't answer your questions let us know.

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