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Protecting production wells using natural gas injection

a technology of natural gas injection and production wells, which is applied in the direction of fluid removal, earth-moving drilling, borehole/well accessories, etc., can solve the problems of reducing the estimated ultimate recovery (eur) of oil and natural gas reserves, and affecting the production of wells. , to achieve the effect of preventing damage to the well, increasing the pressure of the producing well and breaking, and preventing physical communication

Inactive Publication Date: 2017-11-09
NOBLE ENERGY INC +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The patent describes a method for protecting a producing well from damage caused by stimulation fluid from a nearby well. The method involves injecting natural gas into the producing well to increase its pressure and create fractures in communication with perforations. After injecting the natural gas, the treatment well is fractured. This method can act as a barrier to prevent damage to the producing well.

Problems solved by technology

When a well is undergoing a fracturing operation, the stimulation fluid may flow toward and undesirably enter a nearby well.
The stimulation fluid may damage the well's hydrocarbon productivity.
In particular, the stimulation fluid can significantly reduce the hydrocarbon production volumes, thereby reducing the well's Estimated Ultimate Recovery (EUR) of oil and natural gas reserves.
Also, the producing well may require costly and time consuming wellbore remediation operations to restore both wellbore integrity and production capability.
This problem is exacerbated by more dense drilling operations.

Method used

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  • Protecting production wells using natural gas injection
  • Protecting production wells using natural gas injection
  • Protecting production wells using natural gas injection

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Embodiment Construction

[0018]In one embodiment, methods and apparatus are provided to protect a producing well from potentially damaging fluid and / or pressure communications resulting from a stimulation treatment at a nearby well.

[0019]FIG. 1 illustrates a hydrocarbon producing field having treatment well 100 and one or more candidate wells 101, 102, 103. The treatment well 100 may be undergoing a stimulation treatment to enhance hydrocarbon production of the treatment well 100. In one embodiment, the treatment well 100 may be injected with stimulation fluid such as fracturing fluid or acidizing fluid to increase the effective hydrocarbon drainage area as well as permeability of the producing formation 130, thereby increasing the recovery of hydrocarbons from the treatment well 100. Exemplary stimulation fluids may include fluid or gas systems such as but not limited to singular applications of or combinations of water, liquid hydrocarbons, gas, acid, proppant such as sand or solids, chemicals, and additi...

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Abstract

A method of protecting a first well from stimulation fluid of a second well includes shutting in the first well; starting injection of natural gas into the first well to increase a pressure of the first well; treating the second well using a stimulation fluid after starting natural gas injection; and stopping injection of natural gas.

Description

BACKGROUND OF THE INVENTIONField of the Invention[0001]Embodiments of the invention generally relate to methods and apparatus for protecting a well from stimulation fluid. Particularly, embodiments of the present invention relates to methods and apparatus for injecting natural gas into a well to protect the well against stimulation fluid from a neighboring well.Description of the Related Art[0002]In wellbore construction and completion operations, a wellbore is formed to access hydrocarbon-bearing formations (e.g., oil and / or natural gas) by the use of drilling. The drill string is often rotated by a top drive or rotary table on a surface platform or rig, and / or by a downhole motor mounted towards the lower end of the drill string. After drilling to a predetermined depth, the drill string is removed and a section of casing is lowered into the wellbore. A cementing operation is then conducted to fill the annulus with cement. The combination of cement and casing strengthens the wellbo...

Claims

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Application Information

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IPC IPC(8): E21B43/26
CPCE21B43/26E21B43/168E21B43/2605
Inventor GENTRY, FRANK EUGENEBARTON, KIMBERLYSTEVENS, DUSTIN J.POMERANTZ, JONATHAN MAXCHOUDHARY, NARAYAN JEE
Owner NOBLE ENERGY INC
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