Please help in simulation model

[bayan]

I will be appreciated for explain the following terms in simulation model:Numerical dispersion and Throughput.

Thank you in advance

[Shakespear]

I will be appreciated for explain the following terms in simulation model:Numerical dispersion and Throughput.

Thank you in advance

A good explanation of this is here

Correcting for Numerical Dispersion

A numerical simulator such as Eclipse considers each grid block as an element in which all properties are averaged. When water enters one side of such a grid block it is immediately dispersed throughout the gridblock due to the averaging of properties such as saturation. The water saturation at the far end of the grid block will be at the same as at the inlet instantaneously. The water can travel through a course gridded model more quickly than a fine gridded model. Consequently the water front becomes smeared causing a prematurely water break through in the coarse gridded model. This effect is called numerical dispersion. In practice there are other factors contributing to numerical dispersion such as the averaging of relative permeability and of saturations.

[link Point to another website Only the registered members can access]
Fig 13 here shows this even clearer,

[link Point to another website Only the registered members can access] or this

[link Point to another website Only the registered members can access]
This is a problem in HOW you numerically model the reservoir rock through which flow occurs. You decide how large to make grid blocks hence this will effect the degree of numerical dispersion.

When water enters one side of such a grid block it is immediately dispersed throughout the gridblock due to the averaging of properties such as saturation.

You can see this on this page very clearly. Look at the figure where "Gas injection in heterogeneous media by finite difference...."

[link Point to another website Only the registered members can access]
What do you see ?

[bayan]

Thank you Shakespear for interst post and explaination

[DAH7542]

Shakespear provided enough material/explanation on Numerical Dispersion. On the other hand, "Throughput" is defined as the volume of fluid that passes through a gridblock in a single timestep.

[bayan]

Thank you DAH7542 for explaination