Method and system for enhancing hydrocarbon operations

Patent metadata

Field	Value
Publication number	US-10907472-B2
Application number	US-201815889929-A
Country	US
Kind code	B2
Filing date	Feb 6, 2018
Priority date	Mar 10, 2017
Publication date	Feb 2, 2021
Grant date	Feb 2, 2021

Abstract

A method and system are described for imaging core samples associated with a subsurface region. The imaging results may be used to create or update a subsurface model and using the subsurface model and/or imaging results in hydrocarbon operations. The imaging techniques may include NMR imaging and CT imaging. Further, the imaging techniques may also include exposing the core sample to the imaging gas.

First claim

The invention claimed is:

1. A method for generating and using imaging results for hydrocarbon operations comprising:
obtaining a core sample associated with a subsurface region;
exposing the core sample to an imaging fluid;
obtaining first imaging results by performing a first imaging technique on the core sample, wherein the imaging fluid is present within the core sample during the performance of the first imaging technique;
outputting the first imaging results;
obtaining additional imaging results by performing a second imaging technique on the core sample, wherein the core sample is exposed to a flood fluid concurrently with performing the second imaging technique; and
outputting the additional imaging results.

2. The method of claim 1 , wherein the first imaging technique is NMR imaging of the core sample.

3. The method of claim 1 , wherein the first imaging technique is CT imaging of the core sample.

4. The method of claim 1 , wherein the imaging fluid has a selectivity for hydrocarbons that is 1.1 times greater than the imaging fluid's selectivity for water.

5. The method of claim 1 , wherein the imaging fluid comprises a xenon gas.

6. The method of claim 5 , wherein the imaging fluid comprises greater than or equal to 50 volume percent of xenon gas based on the total volume of the imaging fluid.

7. The method of claim 5 , wherein the imaging fluid comprises greater than or equal to 70 volume percent of xenon gas based on the total volume of the imaging fluid.

8. The method of claim 1 , wherein the imaging fluid comprises a krypton gas.

9. The method of claim 8 , wherein the imaging fluid comprises greater than or equal to 50 volume percent of krypton gas based on the total volume of the imaging fluid.

10. The method of claim 8 , wherein the imaging fluid comprises greater than or equal to 70 volume percent of krypton gas based on the total volume of the imaging fluid.

11. The method of claim 1 , further comprising determining producible fluid for the core sample based on the first imaging results, the additional imaging results, or a combination thereof.

12. The method of claim 1 , further comprising determining distribution of oil, water, or any combination thereof based on the first imaging results, the additional imaging results, or a combination thereof.

13. The method of claim 1 , further comprising determining one or more of an amount of pores in the core sample, a distribution of pores in the core sample, and a content of the pores based on the first imaging results, the additional imaging results, or a combination thereof.

14. The method of claim 1 , wherein the flood fluid comprises water or a hydrocarbon recovery fluid.

15. The method of claim 1 , further comprising performing a flow simulation using one or more properties of the sample determined from the first imaging results, the additional imaging results, or a combination thereof.

16. The method of claim 15 , further comprising performing a hydrocarbon operation based on one of the first imaging results, the additional imaging results, the simulation results, and any combination thereof.

17. The method of claim 1 , wherein the imaging fluid has a selectivity for hydrocarbons that is 5 times or greater than the imaging fluid's selectivity for water.

18. The method of claim 1 , wherein the additional imaging technique is NMR imaging of the core sample.

19. The method of claim 1 , wherein the additional imaging technique is CT imaging of the core sample.

20. The method of claim 1 , further comprising drilling a well to obtain a core sample from the subsurface region.

21. An system, comprising:
a core sample unit comprising a housing and a plurality of valves, wherein the housing forms an interior region configured to hold a core sample and to isolate the interior region from external conditions, and wherein the plurality of valves are configured to provide fluid flow paths between the interior region and external locations to the interior region;
an imaging fluid unit in fluid communication with the core sample unit and configured to expose the core sample to an imaging fluid;
a flood fluid unit in fluid communication with the core sample unit, wherein the flood fluid unit is configured to expose the core sample with a flood fluid;
an imaging system configured to create imaging results of the core sample within the core sample unit and to store the imaging results in memory
a control system configured to communicate with the imaging system and to manage acquiring the imaging results; and
a monitor configured to display the imaging results;
wherein the flood fluid unit is configured to communicate with the control system and to manage fluid flow of the flood fluid into the interior region of the core sample unit.

22. The system of claim 21 , wherein the imaging fluid unit comprises one or more vessels, one or more conduits and one or more valves that are coupled together and configured to provide an imaging fluid having a specific composition.

23. The system of claim 21 , wherein the imaging system comprises a nuclear magnetic resonance (NMR) imaging system configured to create NMR imaging results of the core sample within the core sample unit.

24. The system of claim 21 , wherein the imaging system comprises a computed tomography (CT) imaging system configured to create CT imaging results of the core sample within the core sample unit.

25. The system of claim 21 , wherein the control system is further configured to manage pressure conditions, temperature conditions, or any combination thereof that the core sample is exposed to during the creation of the imaging results.

26. The system of claim 25 , further comprising:
a heating unit coupled to the core sample unit, wherein the heating unit is configured to communicate with the control system and to adjust the temperature within the core sample unit; and
a temperature sensor coupled to the heating unit, the core sample unit or any combination thereof, wherein the temperature sensor is configured to measure temperature data within the core sample unit and to communicate the temperature data with the control system, the heating unit or any combination thereof.

27. The system of claim 21 , further comprising:
a pressure unit coupled to the core sample unit, wherein the pressure unit is configured to communicate with the control system and to adjust the pressure within the core sample unit; and
a pressure sensor coupled to the pressure unit, the core sample unit or any combination thereof, wherein the pressure sensor is configured to measure pressure data within the core sample unit and to communicate the pressure data with the control system, the pressure unit or any combination thereof.

28. A system for generating imaging results for a core sample associated with a subsurface region, comprising:
a processor;
an input device in communication with the processor and configured to receive input data associated with a subsurface region;
memory in communication with the processor, the memory having a set of instructions, wherein the set of instructions, when executed by the processor, are configured to:
isolate a core sample associated with a subsurface region within an imaging system;
expose the core sample to an imaging fluid;
obtain first imaging results by performing a first imaging technique on the core sample, where

Assignees

• King Jr Hubert E
• Fullmer Shawn
• Buono Antonio S
• Sansone Michael
• Kortunov Pavel
• Dunsmuir John H
• Gao Bo
• Kralik James G
• Xu Ye
• Exxonmobil Upstream Res Co

Inventors

• King Jr Hubert E
• Fullmer Shawn
• Buono Antonio S
• Sansone Michael
• Kortunov Pavel
• Dunsmuir John H
• Gao Bo
• Kralik James G
• Xu Ye

Classifications

• G01N24/081 Primary

  Making measurements of geologic samples, e.g. measurements of moisture, pH, porosity, permeability, tortuosity or viscosity · CPC title

• G01V3/32

  operating with electron or nuclear magnetic resonance · CPC title

• E21B49/02 Primary

  by mechanically taking samples of the soil · CPC title

• G01R33/305

  specially adapted for high-pressure applications · CPC title

• G01N2223/616

  earth materials · CPC title