Hi Brennan & All, On 29 March 2010 00:46, Brennan Williams wrote:
Andrea Gavana wrote:
As for your question, the parameter are not spread completely randomly, as this is a collection of simulations done over the years, trying manually different scenarios, without having in mind a proper experimental design or any other technique. Nor the parameter values vary only on one axis in each simulation (few of them are like that).
I assume that there is a default "norm" that calculates the distance between points irrespective of the order of the input coordinates?
So if that isn't working, leading to the spurious results, the next step is to normalise all the inputs so they are in the same range, e.g max-min=1.0
Scaling the input data using their standard deviation worked very well for my case.
On a related note, what approach would be best if one of the input parameters wasn't continuous? e.g. I have three quite different geological distributions called say A,B and C. SO some of my simulations use distribution A, some use B and some use C. I could assign them the numbers 1,2,3 but a value of 1.5 is meaningless.
Not sure about this: I do have integer numbers too (the number of wells can not be a fractional one, obviously), but I don't care about it as it is an input parameter (i.e., the user choose how many o2/o3/injector wells he/she wants, and I get an interpolated production profiles). Are you saying that the geological realization is one of your output variables?
Andrea, if you have 1TB of data for 1,000 simulation runs, then, if I assume you only mean the smspec/unsmry files, that means each of your summary files is 1GB in size?
It depends on the simulation, and also for how many years the forecast is run. Standard runs go up to 2038, but we have a bunch of them running up to 2120 (!) . As we do have really many wells in this field, the ECLIPSE summary file dimensions skyrocket pretty quickly.
Are those o2w,o3w and inw figures the number of new wells only or existing+new? It's fun dealing with this amount of data isn't it?
They're only new wells, with a range of 0 <= o2w <= 150 and 0 <= o3 <= 84 and 0 <= inw <= 37, and believe it or not, our set of simulations contains a lot of the possible combinations for these 2 variables (and the other 4 variables too)... Andrea. "Imagination Is The Only Weapon In The War Against Reality." http://xoomer.alice.it/infinity77/ ==> Never *EVER* use RemovalGroup for your house removal. You'll regret it forever. http://thedoomedcity.blogspot.com/2010/03/removal-group-nightmare.html <==