Infinite Aquifer in Eclipse model

[Tejaswy]

Hello,
I have a query with making a infinet aquifer in a model .


A screen shot of the model is given below.

The aquifer is about 1km in length and the gas reservoir is only 500m
Now I have been adding the aquifer manually all this while

For example

AQUNUM
1 50 18 1 1.00E+05 40000 1* 500 2* 1 1/
1 49 18 1 1.00E+05 40000 1* 500 2* 1 1/
1 48 18 1 1.00E+05 40000 1* 500 2* 1 1/
1 47 18 1 1.00E+05 40000 1* 500 2* 1 1/
1 46 18 1 1.00E+05 40000 1* 500 2* 1 1/
1 45 18 1 1.00E+05 40000 1* 500 2* 1 1/
1 44 18 1 1.00E+05 40000 1* 500 2* 1 1/
1 43 18 1 1.00E+05 40000 1* 500 2* 1 1/
1 42 18 1 1.00E+05 40000 1* 500 2* 1 1/
1 41 18 1 1.00E+05 40000 1* 500 2* 1 1/
1 40 18 1 1.00E+05 40000 1* 500 2* 1 1/
1 39 18 1 1.00E+05 40000 1* 500 2* 1 1/
1 38 18 1 1.00E+05 40000 1* 500 2* 1 1/
1 37 18 1 1.00E+05 40000 1* 500 2* 1 1/
1 36 18 1 1.00E+05 40000 1* 500 2* 1 1/
1 35 18 1 1.00E+05 40000 1* 500 2* 1 1/
1 34 18 1 1.00E+05 40000 1* 500 2* 1 1/

I went like this for 33000 lines defining my aquifer.
And now after going through this gruesome process, it seems that the aquifer is not connected to the reservoir.There is no water encroachment into the reservoir.

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

[link Point to another website Only the registered members can access] I checked AQUCON and AQUDIMS. Dunno what the problem is.

So what I wanted to ask you guys for help is, Is there any other easy way to add an aquifer into a reservoir or vice versa.

[Shakespear]

Take a look in the ECL directory for Eclipse 100 data sets. You will find one called Aquifer.Data

-- ================================================== ==================
-- THIS SMALL X-Z CROSS SECTION ILLUSTRATES THE USE OF A FOUR-CELL
-- NUMERICAL AQUIFER.
--
-- THE AQUIFER IS CONNECTED TO THE ENTIRE RIGHT SIDE OF THE FIELD,
-- AND PROVIDES PRESSURE SUPPORT WHILE THE FIELD IS DEPLETED BY A
-- PRODUCTION WELL IN THE LEFT-MOST COLUMN.
-- ================================================== =================
-- IN THE RUNSPEC SECTION THE AQUIFERS ARE DIMENSIONED
-- BY MXNAQN ( THE MAXIMUM NUMBER OF LINES OF AQUNUM DATA )
-- AND BY MXNAQC ( THE MAXIMUM NUMBER OF LINES OF AQUCON DATA )
--
RUNSPEC

[Tejaswy]

Ya i think this is it.
But I cannot find it on my work computer.


Can you paste it here, Please.
It will be of great help

[Shakespear]

-- ================================================== ==================
-- this small x-z cross section illustrates the use of a four-cell
-- numerical aquifer.
--
-- the aquifer is connected to the entire right side of the field,
-- and provides pressure support while the field is depleted by a
-- production well in the left-most column.
-- ================================================== =================
-- in the runspec section the aquifers are dimensioned
-- by mxnaqn ( the maximum number of lines of aqunum data )
-- and by mxnaqc ( the maximum number of lines of aqucon data )
--
runspec
title
numerical aquifer test

dimens
10 1 3 /

oil

water

gas

disgas

field

eqldims
1 100 10 1 20 /

tabdims
1 1 16 12 1 12 /

welldims
2 3 1 2 /

nupcol
4 /

aqudims
4 1 0 0 0 0 /

start
19 'oct' 1982 /

nstack
4 /

grid ================================================== =========

--the basic grid is 10 by 3, the main field lying in columns
-- 1 to 5, and the aquifer in the top cells of columns 7 to 10
dx

30*1000 /

dy

30*1000 /

dz

30*50 /

permx

30*200 /

permy

30*200 /

permz

30*200 /

poro

5*0.3 0.0 4*0.5
5*0.3 5*0.0
5*0.3 5*0.0 /

tops

10*5000 10*5050 10*5100 /

-------------------------------------------------------------------
--the aquifer cells are set up using the aqunum keyword
--all belong to aquifer 1, and connections are made to the first
--cell specified with a given aquifer number - in this case (7,1,1)
--
--the aquifer cell cross section and pore volume are 100000 and 20000,
--the permeability is specified as 200 md, but the porosity (0.5), depth
--an initial pressure are taken from the grid cell values
------------------------------------------------------------------
aqunum
1 7 1 1 1.0e+5 20000 1* 200.0 2* 1 1 /
1 8 1 1 1.0e+5 20000 1* 200.0 2* 1 1 /
1 9 1 1 1.0e+5 20000 1* 200.0 2* 1 1 /
1 10 1 1 1.0e+5 20000 1* 200.0 2* 1 1 /
/

-------------------------------------------------------------------
--the aquifer cell in (7,1,1) is now connected to the positive x-face
--of all the cells in the fifth column of cells. All have connections,
--as there are no active neighbouring cells on this side
--
--the fifth column is specified as a box of cells with i values 5 to 5,
--j values 1 to 1 and k values 1 to 3. The transmssibility multiplier
--is set to unity.
------------------------------------------------------------------
aqucon
1 5 5 1 1 1 3 'i+' 1.0 /
/

rptgrid
24*1 /

props ================================================== =============

swfn

0.12 0.0 0
1.0 0.9 0 /

sgfn

0 0 0
0.02 0 0
0.05 0.005 0
0.85 0.98 0
0.88 1.0 0
/

sof3

0 0 0
0.18 0 0
0.28 0.0001 0.0001
0.38 0.001 0.001
0.83 0.98 0.98
0.86 0.997 0.997
0.879 1 1
0.88 1 1 /

pvtw
4014.7 1.029 3.13d-6 0.31 0 /

rock
14.7 3.0d-6 /


density
49.1 64.79 0.06054 /

pvdg
14.7 166.666 0.008
264.7 12.093 0.0096
514.7 6.274 0.0112
1014.7 3.197 0.014
2014.7 1.614 0.0189
2514.7 1.294 0.0208
3014.7 1.080 0.0228
4014.7 0.811 0.0268
5014.7 0.649 0.0309
9014.7 0.386 0.047 /

pvto
0.001 14.7 1.062 1.04 /
0.0905 264.7 1.15 0.975 /
0.18 514.7 1.207 0.91 /
0.371 1014.7 1.295 0.83 /
0.636 2014.7 1.435 0.695 /
0.775 2514.7 1.5 0.641 /
0.93 3014.7 1.565 0.594 /
1.270 4014.7 1.695 0.51
5014.7 1.671 0.549
9014.7 1.579 0.74 /
1.618 5014.7 1.827 0.449
9014.7 1.726 0.605 /
/

solution ================================================== ===========

equil

5000 4800 6000 0 4200 0 1 0 0 /

rsvd

8200 1.270
8500 1.270 /

rptsol
3*1 9*0 /

summary ================================================== ===========

schedule ================================================== ============

rptsched field 21:07 12 jun 85
1 1 1 1 0 0 0 0 1 0 2 2 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 /

drsdt
0 /


welspecs
'producer' 'g' 1 1 5000 'oil' /
/

compdat
'producer' 1 1 1 3 'o' 0 -1 0.5 -1 0 0 /
/

wconprod
'producer' 'o' 'orat' 5000 4* 1000 0 0 0 /
/

tstep
10*60
/

end

[Tejaswy]

That is how i proceed in my case. Didn't really help.
I can post the data file if you want to have a look .

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

[Shakespear]

Buddy, you have the model

"There is no water encroachment into the reservoir."
Q: Is there a pressure drop for movement to occur around the aquifer ?

Start looking at properties, pressures etc around your aquifer to try to figure out what is happening. For me, no movement means no pressure drop. Why? Maybe porosity is ZERO, Rel. perm is zero etc.

[Tejaswy]

I don't get it. Is it not supposed to take it from the grid section when left blank
I have a porosity of 0.2 for the whole grid.

7 Porosity
• DEFAULT: Grid cell value

From eclipse manual.

So how should the aqunum keyword look like?

Something like this
1 50 18 1 1.00E+05 40000 0.2 1* 500 2* 1 1/