Sign Up Now For Our 2011 Property Evaluation Seminar! Our Seminars are extremely popular, and operate on a "space available" basis due to limited seating. The dates for our next seminars, in both Dallas and London, will be announced in early 2011. If you have any questions please email Tara Urbanski at seminar@nsai-petro.com or call her at (214) 969-5401.