9 Key Elements of the HC System Source Quality Reservoir Presence Trap Quality Source Maturation Reservoir Quality Seal Adequacy HC Migration Biodegra- dation Not Low Gas Saturation Slide 33 One way to derive these numbers is to consider the 9 elements listed here: source quality, etc. We assemble a team composed of two types of people: 1. People who know this area/prospect by having worked the data (e.g., from the Alpha prospect area) 2. People who specialize in specific technical areas and have a lot of experience from many different basins (e.g., a structural geologist who has worked many fault-related traps) This team reviews data and interpretation, and assigns a chance of success number (COS) for all 9 on a scale from 0 to 1 A team of experts consider these key elements for each prospect. They rate the chance of success (COS) for each on a scale of 0 to 1 Courtesy of ExxonMobil L14 – Prospect Analysis