Methods of evaluating cement isolations and quality

Patent metadata

Field	Value
Publication number	US-10557341-B2
Application number	US-201615358891-A
Country	US
Kind code	B2
Filing date	Nov 22, 2016
Priority date	Nov 22, 2016
Publication date	Feb 11, 2020
Grant date	Feb 11, 2020

Abstract

A method may include preparing a map of cement quality for one or more intervals of a wellbore; determining anticipated regions of fluid communication and anticipated regions of zonal isolation from the map of cement quality; and designing a stimulating treatment based on the presence of regions of fluid communication.

First claim

What is claimed is:

1. A method comprising:
preparing a map of cement quality for one or more intervals of a wellbore;
determining anticipated regions of fluid communication and anticipated regions of zonal isolation from the map of cement quality;
designing a stimulating treatment based on the presence of regions of fluid communication based on the map of cement quality created from one or more cement logs,
wherein the designing the stimulating treatment comprises using diversion techniques at anticipated regions of fluid communication; and
performing the stimulation treatment.

2. The method of claim 1 , further comprising: characterizing a cementing job within one or more intervals in a wellbore.

3. The method of claim 1 , wherein the designed stimulating treatment places stimulation stages at anticipated regions of zonal isolation.

4. The method of claim 1 , wherein the designed stimulating treatment avoids placing stimulation stages at anticipated regions of fluid communication.

5. The method of claim 1 , wherein the one or more cement logs are selected from a group consisting of cement bonding logs, variable cement density logs, and ultrasonic cement logs.

6. The method of claim 1 , wherein preparing the map of cement quality comprises simulating mud displacement.

7. The method of claim 1 , further comprising: importing the map of cement quality into a software configured to design stimulating operations.

8. The method of claim 1 , wherein the map of cement quality is based on presence or absence of hydraulic isolation, reservoir quality, or completion quality.

9. A method, comprising:
preparing a map of cement quality for one or more intervals of a wellbore;
comparing the map of cement quality to a map of completion quality and a map of reservoir quality;
designing a stimulating treatment based on the maps of cement quality, completion quality, and reservoir quality; and
performing the stimulation treatment.

10. The method of claim 9 , wherein the designed stimulating treatment comprises stimulation stages placed at regions of having at least two of good cement quality, good completion quality and good reservoir quality.

11. The method of claim 9 , wherein the designed stimulating treatment comprises stimulation stages placed at regions having good reservoir quality and poor cement quality with the use of diversion techniques where there is poor cement quality.

12. The method of claim 9 , wherein the map of cement quality comprises a simulated map based on cement displacement.

13. The method of claim 9 , wherein the map of cement quality comprises one or more cement logs selected from a group consisting of cement bonding logs, variable cement density logs, and ultrasonic cement logs.

Assignees

• Schlumberger Technology Corp

Inventors

• Kolchanov Petr
• De Bruijn Gunnar Gerard
• Potapenko Dmitriy
• Lee Jesse
• Khalilova Polina
• Todd Larry Charles
• Enkababian Philippe
• Naud Olivier
• Mogou Dessap Jean-Paul

Classifications

• E21B33/14 Primary

  for cementing casings into boreholes · CPC title

• E21B47/005 Primary

  Monitoring or checking of cementation quality or level · CPC title

• G06F30/20

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

• E21B43/25

  Methods for stimulating production {(by vibrating earth formations E21B43/003)} · CPC title

• E21B47/0005 Primary

  Fixed Constructions · mapped topic