Try to use colocate cosimulation or external drift in simulation (you need ISATIS to do that) there are classic examples with seismic data.
Be careful with sequential approach, it have be deduced to simulate in an strict second stationary context. Regards Adrian ----- Original Message ----- From: <Rühaak>; "Wolfram" <[EMAIL PROTECTED]> To: <[email protected]> Sent: Tuesday, January 16, 2007 9:55 AM Subject: AI-GEOSTATS: Simulation with hard and soft data > Dear all, > > I would like to ask for some advice regarding a simulation I am planning to compute. > > I want to grid/interpolate the depth of a sedimentary layer. I have two sets of information: 1. drillings and 2. seismics, the seismic data give 3-dimensional lines. > > The drilling information is supposed to be exact; I have two different sets of seismic data: a) with an associated error of approx. +/- 10 m and b) with an associated error of +/- 3 m. > > Although the seismic data are weak concerning the exact depth of the layer, they give good and dense information about the spatial relationship (nice semi-variogram). > > In conclusion I want to calculate a simulation (with gslib) based on the seismic variogram and the drillings as hard data, the seismics should be included as upper/lower bounds for the simulated surface. > > Which geostatistical method suits best for this purpose: Sequential Gaussian Simulation or Sequential Indicator Simulation, or something else? > > Are there papers available dealing with a similar problem. Of course I have books dealing with this topic (e.g. Goovaerts, GSLIB), however I am not a geostatistican and wanted to ask before doing something foolish ;-) > > I favor a simulation because a simple conditional SGS I have computed reproduces in a good manner the surface roughness which is visible within the seismics. > > I would also appreciate additional, general suggestions regarding this purpose. > > Many thanks in advance, regards > Wolfram > -- > Wolfram Ruehaak, [EMAIL PROTECTED] > Phone/Fax: +49 +511 643 -3490/-3665 > Section S5 - geo information systems and databases > Leibniz Institute for Applied Geosciences (GGA) > Stilleweg 2, D-30655 Hanover > > + > + To post a message to the list, send it to [email protected] > + To unsubscribe, send email to majordomo@ jrc.it with no subject and "unsubscribe ai-geostats" in the message body. DO NOT SEND Subscribe/Unsubscribe requests to the list > + As a general service to list users, please remember to post a summary of any useful responses to your questions. > + Support to the forum can be found at http://www.ai-geostats.org/ > + + To post a message to the list, send it to [email protected] + To unsubscribe, send email to majordomo@ jrc.it with no subject and "unsubscribe ai-geostats" in the message body. DO NOT SEND Subscribe/Unsubscribe requests to the list + As a general service to list users, please remember to post a summary of any useful responses to your questions. + Support to the forum can be found at http://www.ai-geostats.org/
