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Accelerated Coalbed Methane Dewatering Using CO2 Injection

a technology of coalbed methane and co2 injection, which is applied in fluid removal, earthwork drilling and mining, and wellbore/well accessories, etc. it can solve the problems of reducing reduce the permeability of the coalbed formation, and reduce the water influx. , the effect of reducing the aperture of the clea

Inactive Publication Date: 2013-10-03
WANAT EDWARD C
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention provides a method for reducing water influx into a coal bed formation to produce methane. This is achieved by injecting a fluid, such as carbon dioxide, to form a permeability barrier in the coal formation, which causes the coal to swell and reduce the permeability of the bed. Methane is then produced from the coal formation through drilling wells. The technical effect is the reduction of water influx, which increases the efficiency of methane production.

Problems solved by technology

Swelling of the coal formation reduces the apertures of the cleats and fractures within the coal formation and thereby reduces the permeability of the coalbed formation.

Method used

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  • Accelerated Coalbed Methane Dewatering Using CO2 Injection
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  • Accelerated Coalbed Methane Dewatering Using CO2 Injection

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embodiments

[0040]Embodiments of the invention may include any combinations of the methods and systems shown in the following numbered paragraphs. This is not to be considered a complete listing of all possible embodiments, as any number of variations can be envisioned from the description above.

[0041]1. A method for producing methane from a coalbed formation, the method comprising:[0042]determining the location of water influx into the coal formation;[0043]determining an area to form a permeability barrier in the coal formation to reduce the water influx into the coal formation;[0044]injecting a strongly adsorbing fluid through one or more injection wells into the area to form a permeability barrier;[0045]drilling one or more methane production wells into the coal formation; and producing methane from the coal formation.

[0046]2. The method of paragraph 2, wherein the strongly adsorbing fluid is selected from the group consisting of carbon dioxide, nitric acid, sulfur hexafluoride, hydrogen sul...

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Abstract

A method for producing methane from a coalbed formation including the accelerated dewatering of the coalbed formation including determining the location of water influx into the coal formation and determining an area to form a permeability barrier in the coal formation to reduce the water influx into the coal formation. A strongly adsorbing fluid is injected through one or more injection wells into the area to form a permeability barrier to the influx of the water. One or more methane production wells are drilled into the coal formation and methane is produced from the coal formation.

Description

CROSS-REFERENCE TO RELATED APPLICATION[0001]This application claims the priority benefit of U.S. Provisional Patent Application 61 / 617,294 filed Mar. 29, 2012 entitled ACCELERATED COALBED METHANE DEWATERING USING CO2 INJECTION, the entirety of which is incorporated by reference herein.FIELD OF THE INVENTION[0002]Embodiments of the present invention are directed toward the dewatering of coalbed methane, and more specifically, towards the dewatering of coalbed methane that is experiencing water influx from an external source.BACKGROUND[0003]This section is intended to introduce various aspects of the art, which may be associated with exemplary embodiments of the present techniques. This discussion is believed to assist in providing a framework to facilitate a better understanding of particular aspects of the present techniques. Accordingly, it should be understood that this section should be read in this light, and not necessarily as admissions of prior art.[0004]Solid carbonaceous su...

Claims

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Application Information

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IPC IPC(8): E21B43/00
CPCE21B43/006
Inventor WANAT, EDWARD C.
Owner WANAT EDWARD C