Voroni Polygons in Moving Domain Analysis

**Chee Koh Peh** · 10-22-2010, 05:42 AM

Thanks my Fellow REs!

Thanks for the papers, illuminating......I think the reason this technique evolved was because it was a lot less of an expensive screening tool compared to simulation in large mature 100+ well fields.

Apart from using Voroni grids and estimated well drainage areas to screen for infill opportunities, using Fekete RTA and pool analysis (i.e. grouping of wells) you can determine if wells are interfering depletion wise (i.e. maximum well density has already occurred in the pool and drainage areas overlap).

The voroni gridding program is a bit of challenge. You know the story, OFM/EHarmony can give you a field map with well locations, but getting this data out into a form where a voroni grid and areas can be calculated is not straightforward.

Besides all the moving domain analysis work to date (as far as I can see) has been performed on single phase gas wells.......multiphase oil wells now that would be a challenge!

Chee Koh Peh.

**Shakespear** · 10-22-2010, 11:35 AM

Within SLB it was hoped that this could be sold as a screening took to then lead to more detailed work on mature fields. I would use it for that. This should then be followed by close analysis of logs in these areas to see if "pay" has not been missed due to bad logs or bad interpretation. There is a LOT of this "treasure" out there but it takes time and experience to find it.

I had a school buddy who was very good at this, who told me that as time passes more of this is left behind. Few have the time or the knowledge of dealing with old data. Remember old logs are not modern logs. Completion, drilling methods changed with time.