Method for determining hydraulic fracture orientation and dimension

Patent metadata

Field	Value
Publication number	US-9988895-B2
Application number	US-201414575176-A
Country	US
Kind code	B2
Filing date	Dec 18, 2014
Priority date	Dec 18, 2013
Publication date	Jun 5, 2018
Grant date	Jun 5, 2018

Abstract

Method for characterizing subterranean formation is described. One method includes: placing a subterranean fluid into a well extending into at least a portion of the subterranean formation to induce one or more fractures; measuring pressure response via one or more pressure sensors installed in the subterranean formation; and determining a physical feature of the one or more fractures.

First claim

The invention claimed is:

1. A method for characterizing a subterranean formation comprising:
placing a subterranean fluid into a well extending into the subterranean formation thereby inducing one or more fractures that extends from a section of the well, wherein the one or more fractures cause a change in volumetric stress of the subterranean formation;
determining a pressure response that results from the change in volumetric stress of the subterranean formation, wherein the pressure response is measured by a sensor that is in at least partial hydraulic isolation with the section of the well that is being fractured; and
determining a physical feature of the one or more fractures via a geomechanical model that relates the pressure response to the physical feature.

2. The method of claim 1 , wherein the physical feature is selected from the group consisting of: orientation, length, height, width, position, and any combination thereof.

3. The method of claim 1 , wherein the one or more fractures is induced by stimulation during multi-stage hydraulically fracturing treatment.

4. The method of claim 3 , wherein a stimulated region of the well is plugged or substantially isolated from upstream portion of the well after each stage of the multi-stage hydraulic fracturing treatment.

5. The method of claim 1 , wherein at least a portion of the well is substantially horizontal.

6. The method of claim 1 , wherein the pressure response is measured by one or more pressure sensors.

7. The method of claim 6 , wherein the one or more pressure sensors are installed in one or more of: an active well, an offset well, or a monitoring well.

8. The method of claim 6 , wherein the placing of the fluid into the well causes a poroelastic response measurable by the one or more pressure sensors.

9. The method of claim 1 , wherein the subterranean fluid is selected from the group consisting of: fracturing fluid, water, gas, and any combination thereof.

10. The method of claim 1 , wherein the pressure response is a change in pressure ranging from about 1 to about 1000 psi.

11. The method of claim 1 , further comprising: determining formation permeability by simulating closure of the one or more fractures due to leak-off.

12. The method of claim 1 , wherein the sensor is installed in the subterranean formation.

13. The method of claim 1 , wherein the mechanical pressure response is poroelastic pressure response.

14. A method comprising:
placing a fracturing fluid down a well of a subterranean formation at a rate sufficient to induce a fracture;
measuring a mechanical pressure response caused by change in volumetric stresses of the subterranean formation via one or more pressure sensors, wherein the one or more pressure sensors are in at least partial hydraulic isolation with the section of the well that is being fractured; and
determining a physical feature of the fracture by applying poroelastic response analysis on the mechanical pressure response via a geomechanical model that relates the mechanical pressure response to the physical feature.

15. The method of claim 14 , wherein the physical feature is selected from the group consisting of: orientation, length, height, width, position, and any combination thereof.

16. The method of claim 14 , wherein the fractures is induced by stimulation during multi-stage hydraulically fracturing treatment.

17. The method of claim 16 , wherein a stimulated region of the well is plugged or substantially isolated from upstream portion of the well after each stage of the multi-stage hydraulic fracturing treatment.

18. The method of claim 14 , wherein at least a portion of the well is substantially horizontal.

19. The method of claim 14 , wherein the one or more pressure gauges are installed in one or more of: an active well, an offset well, or a monitoring well.

20. The method of claim 19 , further comprising:
utilizing pressure response measurements from the one or more pressure gauges to triangulate the physical feature of the fracture.

21. The method of claim 14 , wherein the placing of the fracturing fluid into the well causes a poroelastic response.

22. The method of claim 14 , wherein the pressure response is a change in pressure ranging from about 1 to about 1000 psi.

23. The method of claim 14 , wherein the physical feature is tracked in real time or shortly thereafter.

24. The method of claim 14 , further comprising: determining formation permeability by simulating closure of the one or more fractures due to leak-off.

25. The method of claim 14 , wherein the one or more pressure sensors are installed in the subterranean formation.

26. The method of claim 14 , wherein the mechanical pressure response is poroelastic pressure response.

27. A method for characterizing a subterranean formation comprising:
inducing one or more fractures in a portion of the subterranean formation;
determining a poroelastic pressure response due to the inducing of the one or more fractures, wherein the poroelastic pressure response is measured by a sensor that is in at least partial hydraulic isolation with the portion of the subterranean formation; and
determining a physical feature of the one or more fractures via a geomechanical model that relates the poroelastic pressure response to the physical feature.

28. A method for characterizing a subterranean formation comprising:
inducing one or more fractures in a section of the subterranean formation;
determining a pressure response caused by change in volumetric stresses of the subterranean formation, wherein the pressure response is measured by a sensor that is in at least partial hydraulic isolation with the section of the subterranean formation; and
determining a physical feature of the one or more fractures via a geomechanical model that relates the pressure response to the physical feature.

Assignees

• Conocophillips Co

Inventors

• Roussel Nicolas Patrick
• Florez Horacio
• Rodriguez Adolfo Antonio
• Agrawal Samarth

Classifications

• E21B47/06 Primary

  Measuring temperature or pressure · CPC title

• E21B43/26

  by forming crevices or fractures · CPC title