8/11/2019 Presentacin Control-Inhinbicion Dao Formacion May 31-06
1/12
Production EnhancementFormation DamageControl & Inhibition
8/11/2019 Presentacin Control-Inhinbicion Dao Formacion May 31-06
2/12
2
Organic Deposits Managment
Paraffin Deposits: Precipitation out of waxycrudes when there is a sligh change inequilibrium conditions, causing loss of solubility.A lowering in temperature is the most commoncause.
Asphaltenes Deposits: Precipitation occurs whenthe crude loses it ability to keep asphaltensparticles dispersed. Ususally the occur at thebottom of the well adjacent to the producingformation wall.
8/11/2019 Presentacin Control-Inhinbicion Dao Formacion May 31-06
3/12
3
Visualization of paraffins deposition
8/11/2019 Presentacin Control-Inhinbicion Dao Formacion May 31-06
4/12
4
Organic Deposits Managment
Removal Aromatic and hydrocarbon based
fluids Paraffins in the wellbore,
feedlines, etc Asphaltenes sometimes inside
the formation Inhibition
Paraffins Inhibition: Materialswork by altering chemicalstructure of the paraffin crystals,difficulting them to adhere to
metal surfaces. Asphaltenes Inhibition: Materials
reduce or eliminate flocculationdownhole and allow them to flowback to surface.
8/11/2019 Presentacin Control-Inhinbicion Dao Formacion May 31-06
5/12
5
Paraffins Removal depending on melting point
8/11/2019 Presentacin Control-Inhinbicion Dao Formacion May 31-06
6/12
6
Follow up on paraffins & asphaltenes inhibition
Paraffins Cloud Point Pour Point Temperature
Asphaltenes SARA analysis & CII
CII = (Saturates+Asphaltenes)/(Resins+Aromatics)
API
Pressure Saturation pressure Refractive Index
Rioil=(S*1.4452+A*1.4982 +(R+As)*1.6624)*100(empirical equation after analyzing 67 oils byTianguang/Wang/Buckely)-New Mexico Tech
Delta Ri < 0.04 or 0.05, maybe problem oilsDelta Ri >0.06, stable asphaltenes
. .Re in os
Saturados Asfaltenos C I I
s as Aromtic
8/11/2019 Presentacin Control-Inhinbicion Dao Formacion May 31-06
7/12
10 September 2014
Scaling Innhibition
8/11/2019 Presentacin Control-Inhinbicion Dao Formacion May 31-06
8/12
8
What is Scale?Solid mineral deposit usually formed from producedsalt water. Scale occurs in primary production wells,Secondary wells, injection wells, disposal wells, andpipelines that connect wells to tank batteries.
Scale causes: Pressure changes Temperature changes Impurities Additives Variation of flow rates Mixing of incompatible waters
8/11/2019 Presentacin Control-Inhinbicion Dao Formacion May 31-06
9/12
9
Common OilField Scales
8/11/2019 Presentacin Control-Inhinbicion Dao Formacion May 31-06
10/12
10
Effect of temperature on solubility of CaCO 3 and CaSO 4
8/11/2019 Presentacin Control-Inhinbicion Dao Formacion May 31-06
11/12
11
How Scaling Inhibition works?
Chemical scale inhibitors control thedeposition of scale by either interacting withthe miscroscopic scale surface and altering
the crystal structure as it is forming or bysequestering the cations that precipitate asscale.
8/11/2019 Presentacin Control-Inhinbicion Dao Formacion May 31-06
12/12
12
Typical follow up after a scale inhibition treatment Control Residual LP-55 vs BOPD/BWPD
Pozo XXX Fecha Tratamiento ---------- -
0
300
600
900
1200
1500
M a r c
h 1 5
, 2 0 0 0
M a y
1 5
, 2 0 0 0
J u
l y 1 5
, 2 0 0 0
A u g u s t
1 5
, 2 0 0 0
S e p
t e m
b e r
4 ,
2 0 0 0
S e p
t e m
b e r
4 ,
2 0 0 0
S e p
t e m
b e r
5 ,
2 0 0 0
S e p
t e m
b e r
5 ,
2 0 0 0
S e p
t e m
b e r
6 ,
2 0 0 0
S e p
t e m
b e r
2 0
, 2 0 0 0
O c
t o b e r
6 ,
2 0 0 0
N o v e m
b e r
3 ,
2 0 0 0
N o v e m
b e r
1 7
, 2 0 0 0
D e c e m
b e r
5 ,
2 0 0 1
D e c e m
b e r
2 8
, 2 0 0 0
J a n u a r y
1 6
, 2 0 0 1
F e
b r u a r y
8 ,
2 0 0 0
M a r c
h 1 5
, 2 0 0 1
Tiempo ( Fecha )
B O P D / B W P D ( b b l s
)
0
5
10
15
20
25
R e s
i d u a
l L P - 5
5 ( p p m
)
bopdbwpdppm LP-55
Salinidad & Retorno de calcio @ superficiePozo XXX
Fecha Tratamiento ----------
0
500
1000
1500
2000
2500
3000
M a r c
h 1 5
, 2 0 0 0
J u n e
1 5
, 2 0 0 0
A u g u s
t 1 5
, 2 0 0 0
S e p
t e m
b e r
4 ,
2 0 0 0
S e p
t e m
b e r
5 ,
2 0 0 0
S e p
t e m
b e r
5 ,
2 0 0 0
S e p
t e m
b e r
2 0
, 2 0 0 0
O c
t o b e r
1 8
, 2 0 0 0
N o v e m
b e r
1 7
, 2 0 0 0
D e c e m
b e r
1 6
, 2 0 0 0
J a n u a r y
1 6
, 2 0 0 1
F e
b r u a r y
2 6
, 2 0 0 1
Tiempo ( Fecha )
C a
l c i o
& D u r e z a
C c
i c a
( p p m
)
0
2000
4000
6000
8000
10000
12000
14000
16000
S a l
i n i d a
d ( p p m
C l o r u r o s
)
CalcioCaCO3
Cloruros ppm
Top Related