Eclipse step by step

[coyee]

temr, excellent effort.. I'm following

Thank you

[poss007]

exuse me temr ,but the pictures in the filefactory are not downloadable???
please help ( or put them like an attached files).
Thanks for this great and nice effort...
by the way i'have a step by step course for eclipse if you want i'll share it
i think it can clarify well your explanation

[temr]

Again friends share with you questions and success))
to poss007 not a problem please share here more information more understanding
the link with model and all 5 chapters is
Elamin Wrote
Dear Temr please if you have Swi from the log is =0.35 and from Pc =0.15 and from relative permeability =0.20 which one I can depend on and why ?? thanks
To Elamin
The main chalange of reservoir engeenier to combine core data and log data . You have raised very keen issue how to link Sw by Archie with Core Data , like Pc and Real Perm.
In your example Swc by Pc =0.15, Swc by realperm = 0.2 , first of all check if it the sample core sample. Some times laboratories use different core samples.
If poro sample are different then try to establish trend Swc vs Perm. If this are the same sample then i would use Pc value because the displacement pressure much higher during Swc measurements ( mercury, oil injection) comparing to real perm.
Regarding Archi Sw value if 0.35 is you average then before to change something try to build SCAL data with your Pc pressure un the model , import it to petrel and in Petrel run volumetrics, and compare that value to wat you have from logs .
Follow my link i will insert now step by step profile

[temr]

Chapter 5_1
Elamin, raised a good question. So how we can check average saturation in sim model fast and quick and compare it let say to saturation of well data or gmodel or play with scal data and see results
For example i have to sets of scal data how that will impact to my Sw and apparently reserves

Firstly i prepare second set of scal with following data
SWOF
0.428595 0 1 1.36
0.440147 0.001664 0.906708 0.902168
0.460815 0.001794 0.755375 0.444337
0.483279 0.00262 0.612257 0.213154
0.509156 0.005004 0.472792 0.095297
0.510767 0.005218 0.464956 0.090764
0.512465 0.005452 0.456795 0.086231
0.514261 0.00571 0.448278 0.081698
0.516167 0.005995 0.43937 0.077165
0.518196 0.006314 0.430029 0.072632
0.520364 0.00667 0.420207 0.068099
0.522692 0.007072 0.409847 0.063566
0.525204 0.007529 0.398881 0.059033
0.527929 0.008051 0.387224 0.0545
0.530908 0.008656 0.374775 0.049967
0.53419 0.009364 0.361406 0.045434
0.53784 0.010205 0.346954 0.040901
0.54195 0.011221 0.331203 0.036368
0.546645 0.012474 0.313867 0.031835
0.552113 0.014063 0.294544 0.027302
0.558646 0.016153 0.272644 0.022769
0.56674 0.019047 0.247251 0.018236
0.577333 0.023375 0.216798 0.013703
0.592556 0.030752 0.178212 0.00917
0.619323 0.047409 0.123698 0.004637
0.792122 0.3 0 0.000104
1 1 0 0
/

SGOF
0 0 1 0
0.036361 0.002542 0.683335 0
0.072721 0.02537 0.463762 0
0.109082 0.068665 0.312376 0
0.145443 0.133083 0.208646 0
0.181803 0.219281 0.138051 0
0.218164 0.327919 0.090368 0
0.254525 0.459651 0.058431 0
0.290885 0.615138 0.037243 0
0.327246 0.795035 0.023339 0
0.363607 1 0 0
/

then
i run 1 model with initial scal and import data as i describe in Chapter 5

as all properties in sim folder are dynamic ( if you delete data in sim model all data will disappeared in Petrel ) i create new Sw_scal1 property




Press Enter then NO
you will get new property


now you can run volumetrics
on process tab double click on volume culculations as shown in pictures below




You will be return to


DO the following
Step 1
Define contact by dragging existing contact

In jeneral properties uncheck poro and Ntg

in Oil prop check sw_scal1

Press apply and run
 
Petrel will calculate reserve table

you can import it to excell an get following

for this filed my saturation oil will make 55%

NOTE!!!!!!!!!!! the reserves in table are at reservoir condition to get to standard meter cubic you need to multiply them to shrinkage factor
So you by this approach you can check you reserves in model, average saturation, and play with scal
i mooved to 4share here is link with all chapters

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

[temr]

Sorry for making not clear statements in some sentences - end of the day )

[vitaly1971]

Temr

Plz reupload your link for all chapters.

TIA

[temr]

Vitaly
please find below

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

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

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

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

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

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

[mesozoic]

thank you very much,I want to study step by step following you!

[poss007]

this is the link for the step by step course for eclipse
i hope that it'll be helpful!!

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

[brainmolester]

Temr, Poss007.... you are AWSOME!!!!!!!!!!!!!!!!!!!!!!! keep it coming!!!

[temr]

Poss007 Thanks for you input

[temr]

The Chapter 6 and Chapter 7 will be dedicated pure to well model applied in Eclipse
In the chapter 6 following point will be discussed
1. Well as it defined geometrically in simulator
2. Well inflow equation ( approximate)
3. Connection productivity index calculation

1. Well representation in Eclipse.
Normally what we call well, has wellbore , bottom hole and trajectory, in eclipse for the purpose of simplicity stated that the well penetrates the cell strictly in the center of it so, for showing to eclipse the well you do not need to input well coordinates, all you need is to give to Eclipse the i,j,k indexes of cell which well penetrate.
So for representing well to eclipse you need
1. give i, j of well head , usually it is the value of i,j of 1 cell well penetrates.
2. cells indexes well penetrates .
How to get that values
In Petrel, eclipse specification, this data called , eclipse well connection data, and usually files with that data has extension *.trj.
For exporting that data open test project in Petrel
go to model and press export

in combo box choose eclipse well connection data

and press save
 

in option menu check properties



press ok and open file in text editor

you will have something like this

Lets go details for well_1 connection data
but before this form table in excel and sort data as shown below

in row TRAJECTORY_COLUMN_ORDER you have the following table heads the description of each showed below
MD_ENTRY - measured depth of well trace where well_1 penetrates cell
GRID_I - i index of cell , penetrated by well_1
GRID_J - j index of cell , penetrated by well_1
GRID_K - k index of cell , penetrated by well_1
WELL_ENTRY - note that there 3 rows after it which are x,y,z of point where well_1 penetrates cell
ENTRY_FACE - entry face of cell which well_1 penetrates
MD_EXIT - measured depth of well where well_1 exits cell
WELL_EXIT - note that there 3 rows after it which are x,y,z of point where well_1 exits cell
EXIT_FACE - exit face of cell which well_1 exit cell
After this amust parameters following user properties which will required in Chapter 7 when we will calculate Ro, CCF, Kh
So what is the face of cell? below is the example describing face of cell



From this picture you can see that there is 8 faces of cell and 16 direction all faces might have

From this data for building schedule section we will need
For representing well to eclipse
wellhead_i
wellhead_j

For connection well to grid blocks
GRID_I
GRID_J
GRID_K

For perforation Kh calculation
MD_ENTRY
MD_EXIT
Permx - user defined property
Permy - user defined property
Permz- user defined property

For Ro (pressure equivalent radius )
Nx-user defined property( cell dimension in i direction)
Ny-user defined property( cell dimension in j direction)
Nz-user defined property( cell dimension in k direction)
Permx - user defined property
Permy - user defined property
Permz- user defined property


Just write this data for now we will return to it later in Chapter 7


2. Well inflow equation ( approximate)
For calculating well inflow the following assumptions are used
• The well is assumed to penetrate the full thickness of the block, through its center,
perpendicularly to two of its faces .

NOTE!!!!!!!!!!!!!! the perforation length is counted by Kh

• For any calculation time step density of fluid within the well bore does not vary with
depth.
• Friction effects in the well bore are neglected.
• Capillary pressure is neglected when calculating inflow performance relationship; oil
phase pressure is used.
The inflow equation could be describe by following equation



Or if simply to rewrite equation 5.1 is
Q_liq=(Productivity_index*Delta_Pressure)

and Productivity index= CCF/ viscosity
were CCF - cell connection factor

3. Cell connection factor (CCF) calculation

For calculating CCF you will need following
you need to calculate connection transmissibility in x,y,z direction by following formula



Rw is well radius


NOTE!!!!!!!!! As the inflow formula describe perfect flow model for purposes of taking in to account not perfectness of well drainage area Skin parameter was introduce.
Skin is the degree of clearness of nearwellbore area.
Traditionally if skin is negative it is mean that the area has better drainage and the more skin is positive the bad properties drainage area has. One of way to get skin is to calculate it during well tests base on pressure build up curve.

So you will need to derive 3 T
Tx,Ty,Tz


For this you will need
1. Khx, Khy, Khz




Note!!!!!!!!!!!!!!! that original formula assumes not H, but Hx,Hy,Hz which is magnitude of perforation vector in all 3 direction.
For simplicity I substitute it with constant H




2. Pressure equivalent radius Ro

The pressure equivalent radius should be calculate in 3 direction
At the end you need to get Rox, Roy, Roz
In a Cartesian grid the Peaceman’s formula is used
Below is example of Ro in x direction



Where
Dx-Cell size in z direction
Dy-Cell size in z direction
Dz-Cell size in z direction
Kx-permiability x
Ky-permiability y
Kz-permiability z




3. Culculation of KH ,CCF, Ro


Take in to account that connection transmissibility should be calculated in all 3 direction ( Tx, Ty,Tz)

NOTE!!!! all this 3 values will be used in schedule section to make able eclipse calculate rates
The link is

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