Well, I worked for one of Sclumberger's major competitors.
Looks like you have got yourself a good job. How are you managing to avoid going offshore? Are you working in realtime ops?
Just done a bit of Googling of "Schlumberger Information Solutions". Reminds me of Landmark. I notice there's a huge range of Sclumberger software products.
http://www.slb.com/services/software.aspx