Hello
I am simulating a simple 2D reservoir model of 100x100x1 cells with one producer ad one injector. PERMY*PERMZ have a constant value of 200 md and PERMX has a 10% variation around 200 md. simulation completes with some "non linear convergence failure" problems and many "linear equation not fully converged" errors. Also the producer cannot produce at the target rate from the very beginning and goes under rate control. I have tried checking several things like using EXTRAPMS* turning off TUNING etc but no improvement.
can anyone kindly suggest me what to do by checking the data file given below?

--------------------------------------------------------------------
RUNSPEC
--------------------------------------------------------------------

TITLE

--

METRIC

DIMENS
100 100 1 /

--NUPCOL
--30 /

OIL

WATER




TABDIMS
1 1 50 20 2 20 /

REGDIMS
2 1 0 0 /
WELLDIMS
2 1 2 20 /

ACTDIMS
--NACT MAXNLA MAXNC NACTX
3 50 80 10 /

START
31 'DEC' 0 /


NSTACK
100 /




GRID ================================================== ==============


INIT


SAVE
/

GRIDFILE

1 /


TOPS
10000*2537.4 /

INCLUDE
PERM.GRDECL /

DX
10000*1.00 /

DY
10000*1.00 /

DZ
10000*1.00 /

RPTGRID
'TRANX' 'TRANY' 'TRANZ'/

PROPS ================================================== =============

-- SWAT KRW PCOW
SWFN

0.1 0.000 0
0.2 0.012 0
0.3 0.049 0
0.4 0.111 0
0.5 0.197 0
0.6 0.308 0
0.7 0.444 0
0.8 0.605 0
0.9 0.790 0
1.0 1.000 0 /

SOF2

0.2 0.000
0.3 0.016
0.4 0.065
0.5 0.147
0.6 0.261
0.7 0.408
0.8 0.588
0.9 0.800
/

-- PVT PROPERTIES OF WATER
--
-- REF. PRES. REF. FVF COMPRESSIBILITY REF VISCOSITY VISCOSIBILITY
PVTW
276.8 1.029 4.54e-5 0.31 0 /

-- ROCK COMPRESSIBILITY
--
-- REF. PRES COMPRESSIBILITY
ROCK
1.01 4.35E-5 /

-- SURFACE DENSITIES OF RESERVOIR FLUIDS
--
-- OIL WATER GAS
DENSITY
786.5 1037.8 0.97 /

-- PVT PROPERTIES OF LIVE OIL (WITH DISSOLVED GAS)
-- POIL FVFO VISO
PVDO
276.8 1.695 0.51
545.75 1.671 0.549
621.4 1.579 0.74
/
RSCONST
226.2 276.8 /



SOLUTION ================================================== =============

-- DATUM DATUM OWC OWC GOC GOC RSVD RVVD SOLN
-- DEPTH PRESS DEPTH PCOW DEPTH PCOG TABLE TABLE METH
EQUIL
2560.32 310.26 2590.8 0 2500 0 1 0 0 /

SUMMARY ================================================== =============
RUNSUM
RPTSMRY
0 /
RPTONLY
WOPR
'PRODUCER' /
WOPT
'PRODUCER' /
WWCT
'PRODUCER' /
WWIR
'INJECTOR' /

SCHEDULE ================================================== =============

RPTSCHED
7*0 2 /

DRSDT
0 /
TUNING
/
/
/

-- WELL SPECIFICATION DATA
--
-- WELL GROUP LOCATION BHP PI
-- NAME NAME I J DEPTH DEFN
WELSPECS
'PRODUCER' 'G' 100 1 2560.32 'OIL' /
'INJECTOR' 'G' 1 1 2540.5 'WATER' /
/
-- COMPLETION SPECIFICATION DATA
--
-- WELL -LOCATION- OPEN/ SAT CONN WELL
-- NAME I J K1 K2 SHUT TAB FACT DIAM
COMPDAT
'PRODUCER' 100 1 1 1 'OPEN' 0 -1 0.1524 /
'INJECTOR' 1 1 1 1 'OPEN' 1 -1 0.1524 /
/
-- PRODUCTION WELL CONTROLS
--
-- WELL OPEN/ CNTL OIL WATER GAS LIQU RES BHP
-- NAME SHUT MODE RATE RATE RATE RATE RATE
WCONPROD
'PRODUCER' 'OPEN' 'BHP' 15899 4* 296.5 /
/

-- INJECTION WELL CONTROLS
--
-- WELL INJ OPEN/ CNTL FLOW
-- NAME TYPE SHUT MODE RATE
WCONINJ
'INJECTOR' 'WATER' 'OPEN' 'BHP' 4* 324 /
/

DATES
31 'JAN' 1 /
28 'FEB' 1 /
31 'MAR' 1 /
30 'APR' 1 /
31 'MAY' 1 /
30 'JUN' 1 /
31 'JUL' 1 /
31 'AUG' 1 /
30 'SEP' 1 /
31 'OCT' 1 /
30 'NOV' 1 /
31 'DEC' 1 /
31 'JAN' 2 /
28 'FEB' 2 /
31 'MAR' 2 /
30 'APR' 2 /
31 'MAY' 2 /
30 'JUN' 2 /
31 'JUL' 2 /
31 'AUG' 2 /
30 'SEP' 2 /
31 'OCT' 2 /
30 'NOV' 2 /
31 'DEC' 2 /
31 'JAN' 3 /
28 'FEB' 3 /
31 'MAR' 3 /
30 'APR' 3 /
31 'MAY' 3 /
30 'JUN' 3 /
31 'JUL' 3 /
31 'AUG' 3 /
30 'SEP' 3 /
31 'OCT' 3 /
30 'NOV' 3 /
31 'DEC' 3 /
31 'DEC' 4 /
31 'DEC' 5 /
31 'DEC' 6 /
31 'DEC' 7 /
31 'DEC' 8 /
31 'DEC' 9 /
31 'DEC' 10 /
/


END ================================================== ==============