As the formation volume factor of oil is higher than that of oil, the field average pressure decreases constantly.

ECLIPSE ASSIGNMENT

Work Done By: Otepkaliyev Kairat

Student Number: 10023017

Plot the field liquid production rate, field water cut and field oil production rate vs. time on Figure 1:

Explain the trend N1:

In this figure we have set the Field Liquid Production rate as constant. The FOPR is decreasing because the saturation is decreasing and as a result of it the pressure also decreases. The field water cut is increasing because of the difference of densities of water and oil, so the water cut is high.

Plot field liquid production rate, water injection rate, reservoir volume production rate, reservoir volume injection rate and field reservoir pressure vs. time on Figure 2:

Explain the trend N2:

The FVPR is decreasing because the gas escapes after the bubble point pressure. The Field Average pressure is gradually decreasing but experiences an increase after the bubble point pressure because of the evolution of gas. The FVIR is higher than FWIR because there is gas dissolves inside the oil/water.

Plot the BHP of both wells (WBHP) vs. time and the field average pressure (FPR) vs. time on Figure 3:

Explain the trend N3:

In this figure the bottom hole, pressure of the injector is greater than the reservoir pressure and that is greater than the bottom hole, pressure of the producer. The FPR is in between the bottom hole, pressures of the injector and the producer because it is the average pressure between the two.

The BHP values for the first 10 days in the range 240 bar to 380 bar, explain the initial short-term rise in BHP in the injection well and drop in BHP in the production well. Account for the subsequent trends of these two pressures and of the field average pressure. Plot on Figure 4:

Explain the trend N4:

In this figure the water is injected at the injector well, therefore the BHP increases, and it production well produces. Because of the high permeability, it takes a long time to become stable

Plot field water cut and oil recovery factor for these two cases together with base case on Figure 5:

Explain the trends N5:

In this figure the viscosity of the oil has been changed. As there is a difference of viscosities, there is a fingering effect and the sweep area decreases and it corresponds to the difference in oil recovery factors.

The field liquid production rate, field water injection rate, reservoir production rate, reservoir injection rate and reservoir pressure, on Figure 6:

Explain the trends N6:

As the formation volume factor of oil is higher than that of oil, the field average pressure decreases constantly.

The field liquid production rate, field water injection rate, reservoir production rate, reservoir injection rate and reservoir pressure, explain the trends on Figure 7:

Explain the trends N7:

If the FVPR>FVIR, it results in a decrease in the reservoir pressure due to increase in liquid production. The average pressure decreases according to the pressure of the producer.

The field water cut and oil recovery factor vs. time, explain the trends on Figure 8:

Explain the trends N8:

If the injection and production rates are high, the water cut rises at a very high rate because of high mobility of oil and water, therefore the oil recovery factor is at a very high rate. The trends are dependent on the injection and production rates of the wells .

The field water cut and oil recovery factor vs. total water injection, on Figure 9:

Explain the trends N9:

This figure consists of the oil recovery factors and field water cut against the total water injection. If the injection and production rates are lower, the water cut rises at a high rate, and the total oil recovery factor is lower, because there are already forces acting on it such as the gravitational force, capillary force and driving force.

field water cut and oil recovery factor vs. time for these two cases together with the base case plot on Figure 10:

Explain the trends N10:

In the starting only oil is produced, but after the water breakthrough the water cut increases and more water is produced. The oil recovery factors for the TOP is higher than the one for MID and that is higher than the Base.

The distribution of oil saturation at the 10st time step for these two cases and the base case, Plot on Figure 11:

Explain the trends N11:

Base:

The density of oil is lower than the density of water. Therefore the water is easily moved in the lower layer, and since the permeability is high, there is less oil remaining on the top

Mid:

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