PVTsim Nova 3 2 Nova 3 Cubic Plus Association (CPA) was introduced in PVTsim Nova 2. As CPA reduces...

PVTsim Nova 3.0RELEASE HIGHLIGHTS

HOUSTON | COPENHAGEN | DUBAI | KUALA LUMPUR

EXTENDED GC ANALYSES


Over the years Gas Chromatographs (GC) have advanced. Most PVT laboratories report GC compositions to C36+. The GC technique does however not allow molecular weights and densities to be measured of the individual carbon number fractions. Use of default densities for the carbon number fractions will often create a mismatch with the plus fraction density and that may cause unphysical PVT simulation results.

The new PVTsim Nova GC input not only corrects for the above mentioned mismatch, but also allows the user to input compositional data in the format reported by a PVT lab.

A Carbon Number Distillation (ASTM D2892), also known as a True Boiling Point (TBP) distillation is carried out on a stock tank oil sample, most often taken during a separator test. A TBP analysis has the advantage over a GC analysis that it provides measured molecular weights and densities of the individual carbon number fractions and of the plus fraction. Molecular weights and densities are key parameters in the PVTsim Nova fluid characterization.

The new TBP input in Nova 3 allows the users to directly input measured cumulative weight%’s, distillation cut temperatures, molecular weights and densities of each distillation cut and have that input converted into a mole% composition.

TRUE BOILING POINT (TBP) INPUT


CUTPOINTS

C12

Tem

pera

ture

(˚F)

wt% distilled

216.8

196.4

Asphaltene modeling work is often documented through a PT diagram covering a limited temperature area as seen on the left hand plot. A new asphaltene phase tracking option allows the whole asphaltene phase envelope to be plotted. That is useful to check whether the model is physically sound or only matching a few data points measured in a limited temperature range. PVTsim Nova 3 supports cubic equations, PC-SAFT and CPA for asphaltene modeling.

ASPHALTENE PHASE TRACKING


JAMALUDDIN 2002

Temperature (˚C)

Pres

sure

(psi

a)

1200

1000

800

600

400

200

00 20 40 60 80 100 120 140 160 180 200 220

Upper Asphaltene Onset Pressure Saturation Pressure Lower Asphaltene Onset Pressure

EXPERIMENTAL BUBBLE POINTS EXPERIMENTAL ASPHALTENE ONSET PRESSURES

JAMALUDDIN 2002

Temperature (˚C)

Pres

sure

(psi

a)

800

700

600

500

400

300

200

100

00 100 200 300 400 500 600 700 800 900

Upper Asphaltene Onset Pressure Saturation Pressure Lower Asphaltene Onset Pressure

EXPERIMENTAL BUBBLE POINTS EXPERIMENTAL ASPHALTENE ONSET PRESSURES

Nova 2

Nova 3

Cubic Plus Association (CPA) was introduced in PVTsim Nova 2. As CPA reduces to the classical cubic EoS in the absence of polar components, it is possible for process and flow assurance engineers to make use of EoS models developed for hydrocarbon reservoir fluids and still use CPA and HV for the fluids with water and hydrate inhibitors added. All the user has to do is to select the polar model of preference on a new Polar Comps drop down menu.

ENHANCED POLAR COMPONENTS HANDLING


In Nova 3.0, the user can calculate viscosities of water-in-oil and oil-in-water emulsions. For each input temperature and pressure, viscosities can be calculated for water volume fractions ranging from 0 to 1. The emulsion viscosity may be calculated using the Rønningsen model (default) or the model of Pal and Rhodes.

VISCOSITY OF WATER-OIL EMULSIONS


0.00 0.10 0.20 0.30 0.40 0.50 0.70 0.80 0.90 1.00

VISC

OSI

TY (c

P)

WATER VOLUME

EMULSION VISCOSITY AT 60˚C AND 200 BARA

ETHANOL HURON-VIDAL PARAMETERS UPDATED

PVTsim Nova 3.0 uses HV parameters updated based on the measured data from the Dortmund Data Bank.Validation reports available for SRK-HV and PR-HV.

AC

T 8

49

04

PO

INT

S

AC

M 1

56

0 S

ET

S

CR

I 3

193

SE

TS

AZ

D 5

60

88

PO

INT

S

PO

W 1

40

40

CP

E 5

99

0 S

ET

S

EG

LE

25

75

SE

TS

EG

LE

10

84

0 S

ET

S

EC

ND

718

6 S

ET

S

EC

ND

43

59

SE

TS

PO

LY

ME

R 2

00

21

SE

TS

MT

CN

45

41

SE

TS

MS

OS

15

189

SE

TS

MS

FT

49

24

SE

TS

MP

VT

10

84

6 S

ET

S

GH

D 3

26

8 S

ET

SM

FL

P 4

20

SE

TS

VLE36415SETS

HPV38149SETS

HPV52568SETS

VF67423SETS

PCP270475

SETS

PCP VLE: 85404 SETS (VLE+HPV+ELE)

VAPOR (GAS) - LIQUID LIQUID - LIQUID EXCESS ADSORPTION TRANSPORT GAS - HYDRATE

X24166SETS

VIS36240SETS

ESLE38732SETS

HE22469SETS

LLE29489SETS

GLE22355SETS

SOLID - LIQUID

PURE

FURTHERDATA

ELECTROLYTESPOLYMER

FLASH POINTS


Taking the Huron Vidal parameter update project further, PVTsim Nova 3.0 will have updated parameters for Ethanol - Cx (x = 1, 2, 3) and Ethanol - H2O. The Ethanol - CO2 parameters were also reviewed and found to be acceptable.

CPA PARAMETERS FOR GLYCOLS & EtOH

The CPA model was introduced in PVTsim Nova 2.0. It has in Nova 3 been extended to also handle MEG, DEG, TEG and EtOH.


C O H H

H H

- +

C O H H

H

- +

C H

H H

OH H

-

+

S H H

C OO

C H H

OC H

H O

H H

- -

+ +

C O C H

H

H

H C H

H C H

H O

C H H

OC H

H O

H H

- -

+ +

C H H

OC H

H O

H H

- -

+ +

C O C H

H

H

H

OO O H

H + + -

- O

OH

+ -

O H + -

OO

O H H + + - -

PVTsim Nova 3 can model hydrates formation based on the phase equilibria calculated by the Cubic Plus Association (CPA) equation-of-state. Hydrate inhibition equilibrium can also be modeled by CPA.

CPA FOR HYDRATES


Gas Molecules

Water Molecules

ENHANCED ECLIPSE BLACK OIL INTERFACE

Eclipse Black Oil has strict input checks. Bo, Rs, and other black oil properties must be monotonic with pressure. Eclipse Black Oil further checks for negative oil and gas compressibilities (Co and Cg). These are defined in terms of black oil properties and not to be mistaken for isothermal gas and oil compressibilities. PVTsim Nova 3 has enhanced procedures for adjusting black oil properties to comply with the input check in Eclipse Black Oil without sacrificing a physical meaningful fluid description. PVTsim Nova 3 also supports Eclipse Black Oil API vs. Depth.


0 100 200 300 400 500 600

Bo

(m3 /

Sm

3 )

Pressure (bara)

PVTO - Bo vs. Pressure1.400

1.350

1.300

1.250

1.200

1.150

1.100

1.050

1.000

0 100 200 300 400 500 600

Oil

Visc

osity

(cP)

Pressure (bara)

PVTO - Oil Viscosity vs. Pressure25.0

20.0

15.0

10.0

5.0

0.0

New interface options for t-NavigatorReservoir Simulator

New interface for UniSim Design Process Simulator

NEW PVTsim Nova INTERFACES


CALSEP OFFICES

Copenhagen · DenmarkCalsep A/SParallelvej 12DK-2800 Kgs. Lyngby, DenmarkPhone: +45 45 87 66 46Fax: +45 45 87 62 72Email: [email protected]

Houston · USACalsep Inc.10370 Richmond Avenue, Suite 1375Houston, Tx 77042, USAPhone: +1 281 759 0844Fax: +1 281 759 0845E-mail: [email protected]

Dubai · UAECalsep FZ-LLCP.O. Box 500 534, Dubai Internet CityDubai, United Arab EmiratesPhone: +971 4 391 3667Fax: +971 4 390 8208E-mail: [email protected]

Kuala Lumpur · MalaysiaCalsep Asia Pacific Sdn BhdSuite 19-05, G-Tower, 199 Jalan Tun Razak50400 Kuala Lumpur, MalaysiaPhone: +6(03) 2168 4252Fax: +6(03) 2168 4618E-mail: [email protected]


PVTsim Nova 3 2 Nova 3 Cubic Plus Association (CPA) was introduced in PVTsim Nova 2. As CPA reduces...

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