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→Hydrodynamic gradients
Because the density difference between gas and water is greater than that between oil and water, the dips of gas-oil and gas-water contacts are the same and always less than those of oil-water contacts responding to the same hydrodynamic gradient. The dip direction is the same for all fluid contacts.
Because the density difference between gas and water is greater than that between oil and water, the dips of gas-oil and gas-water contacts are the same and always less than those of oil-water contacts responding to the same hydrodynamic gradient. The dip direction is the same for all fluid contacts.
''Example:'' Determine the position and dips of the fluid contacts from data in [[Figure 3]]. Well B is a discovery well with reservoir gas, oil, and water densities of 0.15, 0.8, and 1.0 g/cm<sup>3</sup>, respectively. Gas and oil contacts are at elevations of [[length::-5020 ft]] and [[length::-5080 ft]], respectively.
''Example:'' Determine the position and dips of the fluid contacts from data in [[:file:fluid-contacts_fig3.png|Figure 3]]. Well B is a discovery well with reservoir gas, oil, and water densities of 0.15, 0.8, and 1.0 g/cm<sup>3</sup>, respectively. Gas and oil contacts are at elevations of [[length::-5020 ft]] and [[length::-5080 ft]], respectively.
''Solution:'' First determine (in English units) the potentiometric gradients using sea level datum:
''Solution:'' First determine (in English units) the potentiometric gradients using sea level datum: