Changes

==Fault seal behavior alteration==

==Fault seal behavior alteration==

Faults can also leak over geologic time spans but seal during production time spans. Even a low fault-zone permeability may allow hydrocarbons to leak given a time span of 10⁶ m.y. High production rates, however, creating pressure changes over a span of 1–10 years, will cause low-permeability fault zones to act as barriers to hydrocarbon movement. A cross-leaking fault may develop different hydrocarbon contacts and different pressures during production. SGR thresholds for seal behavior may have to be calibrated separately for exploration and for reservoir simulations.

Faults can also leak over geologic time spans but seal during production time spans. Even a low fault-zone permeability may allow hydrocarbons to leak given a time span of 10⁶ m.y. High production rates, however, creating pressure changes over a span of 1–10 years, will cause low-permeability fault zones to act as barriers to hydrocarbon movement. A cross-leaking fault may develop different hydrocarbon contacts and different pressures during production. Shale gouge ratio (SGR) thresholds for seal behavior may have to be calibrated separately for exploration and for reservoir simulations.

==Fault seal and field unitization==

==Fault seal and field unitization==