Construction of digital representation of complex compositional fluids

Patent metadata

Field	Value
Publication number	US-11118428-B2
Application number	US-201415102271-A
Country	US
Kind code	B2
Filing date	Nov 25, 2014
Priority date	Dec 4, 2013
Publication date	Sep 14, 2021
Grant date	Sep 14, 2021

Abstract

A method for performing a simulation of a field having a subterranean formation is described. The method includes obtaining phase behavior data of subterranean fluids of the field, generating an equation of state (EOS) model of the fluids based on the phase behavior data, generating a Helmholtz free energy model that reproduces predictions of the EOS model over a pre-determined pressure and temperature range, and performing the simulation of the field using the Helmholtz free energy model. The method may further include reducing the EOS model to a reduced EOS model having a reduced number of components to represent the EOS model over a pre-determined pressure and temperature range, generating the Helmholtz free energy model based on the reduced EOS model, and obtaining and using phase behavior data of injection fluids used. A computer system data.

First claim

What is claimed is:

1. A method for improving hydrocarbon recovery by performing a simulation of a field having a subterranean formation, comprising:
obtaining phase behavior data of subterranean fluids of the field;
generating an equation of state (EOS) model of the fluids based on the phase behavior data;
generating, by a processor of a computer system, a Helmholtz free energy model that reproduces predictions of the EOS model over a pre-determined pressure and temperature range;
performing, by the processor, the simulation of the field using the Helmholtz free energy model; and
performing or modifying a field operation based on the simulation results, wherein the field operation is well planning, well targeting, well completion, operating levels, or production rates.

2. The method of claim 1 , wherein the subterranean fluids comprise injection fluids.

3. The method of claim 1 , further comprising:
reducing the EOS model to a reduced EOS model having a reduced number of components to represent the EOS model over a pre-determined pressure and temperature range, and
wherein the Helmholtz free energy model is generated based on the reduced EOS model.

4. The method of claim 1 , wherein the phase behavior data represents at least one property of the fluids selected from a group consisting of pressure, volume, temperature, fluid-fluid interface phenomenon, fluid-solid interface phenomenon, and rheological property.

5. The method of claim 4 , wherein the fluids comprise a multiphase compositional fluid system.

6. A computer system comprising:
a processor and memory; and
a reservoir production (RP) tool stored in the memory, executing on the processor, and comprising:
an input module configured to obtain phase behavior data of fluids;
an equation of state (EOS) model generator configured to generate an EOS model of the fluids based on the phase behavior data;
a free energy model generator configured to generate a Helmholtz free energy model that reproduces predictions of the EOS model over a predetermined temperature and pressure range; and a simulator configured to perform simulation of the field using the Helmholtz free energy model; and

a repository configured to store the phase behavior data, the EOS model, and the Helmholtz free energy model
wherein the processor further configured to perform or modify a field operation based on the simulation result, wherein the field operation is well planning, well targeting, well completion, operating levels, or production rates.

7. The system of claim 6 , the EOS model generator further configured to:
reduce the EOS model to a reduced EOS model having a reduced number of components to represent the EOS model over a pre-determined pressure and temperature range, and
wherein the Helmholtz free energy model is generated based on the reduced EOS model.

8. The system of claim 6 , wherein the phase behavior data represents at least one property of the fluids selected from a group consisting of pressure, volume, temperature, fluid-fluid interface phenomenon, fluid-solid interface phenomenon, and rheological property.

9. The system of claim 6 , wherein the fluids comprise a multiphase compositional fluid system.

10. A non-transitory computer-readable medium comprising instructions for improving hydrocarbon recovery by performing a simulation of a field having a subterranean formation, the instructions when executed by a computer processor comprising functionality for:
obtaining phase behavior data of subterranean fluids of the field;
obtaining phase behavior data of injection fluids used in the field;
generating an equation of state (EOS) model of the subterranean and injection fluids based on the phase behavior data;
generating a Helmholtz free energy model that reproduces predictions of the EOS model over a pre-determined pressure and temperature range;
performing the simulation of the field using the Helmholtz free energy model; and
performing or modifying a field operation based on the simulation result, wherein the field operation is well planning, well targeting, well completion, operating levels, or production rates.

11. The non-transitory computer readable medium of claim 10 , the instructions when executed by the computer processor further comprising functionality for:
reducing the EOS model to a reduced EOS model having a reduced number of components to represent the EOS model over a pre-determined pressure and temperature range, and
wherein the Helmholtz free energy model is generated based on the reduced EOS model.

12. The non-transitory computer readable medium of claim 10 , wherein the phase behavior data of the subterranean and injection fluids represents at least one property of the fluids selected from a group consisting of pressure, volume, temperature, fluid-fluid interface phenomenon, fluid-solid interface phenomenon, and rheological property.

13. The non-transitory computer readable medium of claim 10 , wherein the subterranean and injection fluids comprise a multiphase compositional fluid system.

14. A method for improving hydrocarbon recovery by performing a simulation of a field having a subterranean formation, comprising:
obtaining phase behavior data of subterranean fluids of the field;
obtaining phase behavior data of injection fluids used in the field;
generating, by a processor of a computer system, a Helmholtz free energy model that reproduces the phase behavior data of the fluids of the field over a predetermined pressure and temperature range;
performing, by the processor, the simulation of the field using the Helmholtz free energy model; and
performing or modifying a field operation based on the simulation result, wherein the field operation is well planning, well targeting, well completion, operating levels, or production rates.

15. The method of claim 14 , further comprising:
deriving an equation of state (EOS) model of the subterranean and injection fluids based on the Helmholtz free energy model.

16. The method of claim 14 , wherein the phase behavior data of the subterranean and injection fluids represents at least one property of the fluids selected from a group consisting of pressure, volume, temperature, fluid-fluid interface phenomenon, fluid-solid interface phenomenon, and rheological property.

17. The method of claim 14 , wherein the subterranean and injection fluids comprise a multiphase compositional fluid system.

18. A computer system comprising:
a processor and memory; and
a reservoir production (RP) tool stored in the memory, executing on the processor, and comprising:
an input module configured to obtain phase behavior data of subterranean fluids of a field;
an input module configured to obtain phase behavior data of injection fluids used in the field;
a free energy model generator configured to generate a Helmholtz free energy model that reproduces the phase behavior data of the subterranean and injection fluids over a pre-determined pressure and temperature range; and
a simulator configured to perform a simulation of the field using the Helmholtz free energy model; and

a repository configured to store the phase behavior data and the Helmholtz free energy model;
wherein the processor further configured to perform or modify a field operation based on the simulation result, wherein the field operation is well planning, well targeting, well completion, operating levels, or production rates.

19. The system of claim 18 , wherein the phase behavior data of the subterranean and injection fluids represents at l

Assignees

• Schlumberger Technology Corp

Inventors

• Ratulowski John
• Klemin Denis
• Andersen Mark
• Dinariev Oleg
• Evseev Nikolay Vyacheslavovich
• Ivanov Evgeny
• Safonov Sergey Sergeevich
• Koroteev Dmitry Anatolievich

Classifications

• E21B49/00 Primary

  Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells · CPC title

• E21B49/02

  by mechanically taking samples of the soil · CPC title

• E21B43/20

  Displacing by water · CPC title

• G06F2111/10

  Numerical modelling · CPC title

• G06F30/20

  Design optimisation, verification or simulation (optimisation, verification or simulation of circuit designs G06F30/30) · CPC title