By Sean Shannon Murphy, P.E. Sean has a degree in petroleum engineering and over 45 years of experience in domestic and international onshore and offshore operations, reservoir engineering, well control, snubbing, fishing, and production engineering. He is a registered professional petroleum engineer in the states of Oklahoma, Texas, and Ohio. The spreadsheet software contains all of the equations from the book, Oil and Gas Survival Guide, 2nd Edition in addition to other practical petroleum engineering equations.