− | The solid fraction of oil unaffected by these processes ultimately is recycled in the erosional regime. Because all three processes result in oil with higher viscosity sulfur, and nitrogen, the processes may reduce the economic value of the accumulation before the accumulation is actually destroyed. | + | The solid fraction of oil unaffected by these processes ultimately is recycled in the erosional regime. Because all three processes result in oil with higher [[viscosity]], [[sulfur]], and [[nitrogen]], the processes may reduce the economic value of the accumulation before the accumulation is actually destroyed. |
| * Condensates and dry gases are also affected by biodegradation.<ref name=ch11r36>Walters, C. C., 1990, Organic geochemistry of gases and condensates from Block 551A High Island South Addition offshore Texas, Gulf of Mexico, in D. Schumacher, and B. F. Perkins, eds., Gulf Coast Oils and Gases—Their Characteristics, Origin, Distribution, and Exploration and Production Significance: Proceedings of the Ninth Annual Research conference, GCS-SEPM, October 1990, p. 185–198.</ref> | | * Condensates and dry gases are also affected by biodegradation.<ref name=ch11r36>Walters, C. C., 1990, Organic geochemistry of gases and condensates from Block 551A High Island South Addition offshore Texas, Gulf of Mexico, in D. Schumacher, and B. F. Perkins, eds., Gulf Coast Oils and Gases—Their Characteristics, Origin, Distribution, and Exploration and Production Significance: Proceedings of the Ninth Annual Research conference, GCS-SEPM, October 1990, p. 185–198.</ref> |
− | * Most biodegraded oils are characterized by higher viscosity and lower [[API gravity]] than unaltered petroleum, but biodegraded high-wax oils may have lower viscosity. | + | * Most biodegraded oils are characterized by higher [[viscosity]] and lower [[API gravity]] than unaltered petroleum, but biodegraded high-wax oils may have lower viscosity. |