Lecture-4 aquifer influx models Pot aquifer

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Lecture-4 aquifer influx models Pot aquifer

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Description

Lecture-4 aquifer influx models Pot aquifer Schilthuis steady-state Hursts modified steady-state The van Everdingen-Hurst unsteady-state Edge-water drive Bottom-water drive Linear-water drive The Carter-Tracy unsteady-state Fetkovichs

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Lecture-4 aquifer influx models Pot aquifer
Schilthuis’ steady-state
Hurst’s modified steady-state
The van Everdingen-Hurst unsteady-state
Edge-water drive
Bottom-water drive
Linear-water drive
The Carter-Tracy unsteady-state
Fetkovich’s method
Radial aquifer
Linear aquifer

Do you know Farouk Al Kasim?

Problem-1 Tarek Ahmed

or Water influx constant

Problem-3 Schilthuis

Water influx models Hurst’s modified steady-state model.
The problem with the Schilthuis’ steady-state model is that the water is drained from the aquifer, the aquifer drainage radius ra will increase as the time increases. Hurst (1948) proposed that the aquifer radius ra will be a function of time.
Dimensionless radius

Schilthuis’ model will be

Determination of the two unknown constants a and C.

Example 10-5 Hurst

Solution

Solution Using any point at the straight line to find the constant a

Solution

The van Everdingen-Hurst unsteady-state
Dimensionless diffusivity equation

Van Everdingen-Hurst

They solved diffusivity equation for
Water influx by applying the laplace transformation

The constant terminal presssure at the initial and outer boundary condtions

The Van Hurst assumed that the aquifer is characterized by:

Water does not encroach on all sides of the reservoir, or the reservoir is not circular in nature.

Example 10-6 Van Everdingen and Hurst

Use table 10-1 (Tarek Ahmed), take the average of WeD between two points of tD if the given tD is in between.

Then calculate the cumulative water influx by: What is wrong here ?

See you next time inshallah HAVE A NICE TIME

Lecture-4 aquifer influx models Pot aquifer

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