How is ultimate recovery determined in water drive reservoirs?
How is ultimate recovery determined in water drive reservoirs?
In water drive reservoirs or in most waterflood or streamflooding operations, ultimate recovery can be estimated by plotting the ratio of water to oil produced (WOR) against cumulative recovery (Figure 7.1.5 ). The maximum WOR that can be sustained under the assumed economic conditions can be used as an economic limit.
How much oil is recovered from a Gor reservoir?
When the GOR initially rises, the oil production falls and artificial lift systems are then instituted. Oil recovery from this type of reservoir is typically between 20% and 30% of original oil in place (i.e. low). Of this only 0% to 5% of oil is recovered above the bubblepoint.
What’s the difference between a reservoir and a depletion drive?
Reservoir pressure: The reservoir pressure falls slowly and continuously. Pressure tends to be maintained at a higher level than in a depletion drive reservoir. The degree of pressure maintenance depends upon the volume of gas in the gas cap compared to the oil volume. Water production: Absent or negligible water production.
How is a solution gas drive related to a reservoir drive?
A solution gas drive refers to the gas present in solution or dissolved in the oil. Light oil, for instance, has a high concentration of dissolved gas compared to heavy oil. As the oil is produced, the oil expands as a result of this dissolved gas. Remember that this gas is dissolved in the oil under great pressure.
In water drive reservoirs or in most waterflood or streamflooding operations, ultimate recovery can be estimated by plotting the ratio of water to oil produced (WOR) against cumulative recovery (Figure 7.1.5 ). The maximum WOR that can be sustained under the assumed economic conditions can be used as an economic limit.
When the GOR initially rises, the oil production falls and artificial lift systems are then instituted. Oil recovery from this type of reservoir is typically between 20% and 30% of original oil in place (i.e. low). Of this only 0% to 5% of oil is recovered above the bubblepoint.
What should I do if my oil reservoir is full?
If the drive is full already, all you need to do is fill the reservoir. I would strongly suggest you remove the reservoir and clean it out (This should be done yearly) to prevent the build up of sludge in the reservoir. Then fill the reservoir.
Reservoir pressure: The reservoir pressure falls slowly and continuously. Pressure tends to be maintained at a higher level than in a depletion drive reservoir. The degree of pressure maintenance depends upon the volume of gas in the gas cap compared to the oil volume. Water production: Absent or negligible water production.
