Tag: modeling

Petrel error: “unable to find first line of input data”

I ran into this today, and my best guess is that I was trying to use ASCII columnar data rather than Standard Keyword data.  

File that didn’t work:

MD TVD EW NS INC AZM
2018 2018 0 0 0.57 63.8
2070 2070 0.42 0.33 0.57 49.74
2160 2160 1.37 0.69 0.88 66.9
2250 2249.98 2.9 1.4 1.19 68.68

File that did work:

*WELL 33xxxxxxxxxxxx    
*XYUNITS  M    
*DEPUNITS F    
*COLUMNS *MD *INC *AZM
0 0 0
2018 0.57 63.8
2070 0.57 49.74
2160 0.88 66.9
2250 1.19 68.68
2340 1.55 71.48

Petra exports in both formats for individual wells but not for bulk export.

QOTD: Smallest Model Possible in gslib?

Q:  How small can a 3D geological model be?  Does gslib even recognize units, or is the coordinate system external to the software?

A:  It does not appear that any coordinate systems are built into gslib, which means units are held externally.  “100” could mean 100 km or 100 microns as far as gslib is concerned.  http://www.gslib.com/gslib_help/format.html

(QOTD: question of the day)

Getting Started with Spatial Modeling Environment

UPDATE: This attempt has been abandoned at the advice of one of the SME developers. R was suggested as an alternative.

Sometime this week I hope to get the Spatial Modeling Environment up and running on at least one of my computers (office Windows 7 PC, Macbook Pro OS X Snow Leopard, or Ubuntu 12.04(?) in VirtualBox), but I’m posting this as a shoutout to anyone who has attempted this before: the README is pretty technical, and I could use some help.

This is also a note to developers (even if they are scientists) who write “user-friendly,” “icon-based” software and then make you jump through command line hoops to install it. Stop it. What are you trying to accomplish? The more people who can install your software, the more people will use it, and the better it will become.

I don’t think I’m being unnecessarily harsh. Luckily, I really want to use this software and I’m fairly comfortable following detailed specifications and dealing with the command line, but there are others who aren’t. Hopefully I can follow the directions and install this software and use it for my dissertation; hopefully I can put together some sort of installation tutorial that is clearer than the README; and hopefully this will help someone in the future.

P.S. I’m working through Landscape Simulation Modeling this week as well, and I’m pretty pumped to try SME. How’s that for an endorsement?