Method of using pressure signatures to predict injection well anomalies

Inactive Publication Date: 2010-12-16
MI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0011]Other aspects and advantages of the invention will be apparent from the following description and the appended claims.

Problems solved by technology

When the drilling mud reaches the platform, it is contaminated with small pieces of shale and rock that are known in the industry as well cuttings or drill cuttings.
The disposal of the drill cuttings and drilling mud is a complex environmental problem.
Drill cuttings contain not only the residual drilling mud product that would contaminate the surrounding environment, but may also contain oil and other waste that is particularly hazardous to the environment, especially when drilling in a marine environment.

Method used

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  • Method of using pressure signatures to predict injection well anomalies
  • Method of using pressure signatures to predict injection well anomalies
  • Method of using pressure signatures to predict injection well anomalies

Examples

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Embodiment Construction

[0018]In one aspect, embodiments disclosed herein relate to interpreting pressure behavior of CRI operations. In another aspect, embodiments disclosed herein relate to assessing potential risk and impact on a subsurface drilling system and surrounding formation.

[0019]Batch processing of slurry (i.e., injecting conditioned slurry into the disposal formation and then waiting for a period of time after the injection) allows fractures to mechanically close and, to a certain extent, dissipates the build-up of pressure in the disposal formation. However, the pressure in the disposal formation typically increases due to the presence of the injected solids (i.e., the solids present in the drill cuttings slurry).

[0020]The slurry to be injected should be maintained within calculated parameters to reduce the chances of fracture plugging. To monitor the slurry, rheological parameters are often checked on a periodic basis to ensure that the slurry exhibits predetermined characteristics. For exam...

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Abstract

A method of designing a response to a fracture behavior of a formation during re-injection of cuttings into a formation, the method including obtaining a pressure signature for a time period, interpreting the pressure signature for the time period to determine a fracture behavior of the formation, determining a solution based on the fracture behavior of the formation, and implementing the solution is disclosed. A method of assessing a subsurface risk of a cuttings re-injection operation, the method including obtaining a pressure signature for a time period, interpreting the pressure signature to determine a fracture behavior of the formation, characterizing a risk associated with the determined fracture behavior of the formation, and implementing a solution based on the characterized risk is also disclosed.

Description

BACKGROUND[0001]1. Field of the Invention[0002]Embodiments disclosed herein generally relate to methods of determining the fracture behavior of a disposal formation during a CRI operation.[0003]2. Background Art[0004]In the drilling of wells, a drill bit is used to dig many thousands of feet into the earth's crust. Oil rigs typically employ a derrick that extends above the well drilling platform. The derrick supports joint after joint of drill pipe connected end-to-end during the drilling operation. As the drill bit is pushed further into the earth, additional pipe joints are added to the ever lengthening “string” or “drill string”. Therefore, the drill string includes a plurality of joints of pipe.[0005]Fluid “drilling mud” is pumped from the well drilling platform, through the drill string, and to a drill bit supported at the lower or distal end of the drill string. The drilling mud lubricates the drill bit and carries away well cuttings generated by the drill bit as it digs deepe...

Claims

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Application Information

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IPC IPC(8): E21B49/00
CPCE21B21/066E21B49/008E21B47/10E21B41/0057E21B21/00E21B21/01
InventorSHOKANOV, TALGAT A.NOLTE, KENNETH G.FRAGACHAN, FRANCISCOOVALLE, ADRIANA P.
OwnerMI