Sub-Surface Coalbed Methane Well Enhancement Through Rapid Oxidation
First Claim
1. A method comprising:
- (a) providing a wellbore able to access a coal-bearing formation;
(b) providing a perforation charge comprising a standard charge portion and a composition able to produce localized temporary oxidizing environments in perforations;
(c) perforating the coal-bearing formation through the wellbore with the perforation charge to form initial perforations defined by carbonaceous material, the initial perforations having localized temporary oxidizing environments therein; and
(d) initiating combustion of the carbonaceous material using the oxidizing environments, thus enlarging the initial perforations.
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Accused Products
Abstract
Methods of stimulating production of coalbed methane from a coal-bearing formation are described, one method involving providing a perforation charge comprising a standard charge portion and a charge additive able to produce localized temporary oxidizing environments in perforations; perforating a coal-bearing formation with the perforation charge to form initial perforations defined by carbonaceous material, the initial perforations having localized temporary oxidizing environments in them, and initiating combustion of the carbonaceous material using the oxidizing environments, thus enlarging the initial perforations. Other methods involve perforating the coal-bearing formation with a standard perforation charge, thereby creating perforations; and treating the perforations with a composition creating temporary local oxidizing environments involving an oxidant in the perforations, and initiating combustion of carbonaceous material using the excess oxidant, thus enlarging the perforations.
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Citations
25 Claims
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1. A method comprising:
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(a) providing a wellbore able to access a coal-bearing formation;
(b) providing a perforation charge comprising a standard charge portion and a composition able to produce localized temporary oxidizing environments in perforations;
(c) perforating the coal-bearing formation through the wellbore with the perforation charge to form initial perforations defined by carbonaceous material, the initial perforations having localized temporary oxidizing environments therein; and
(d) initiating combustion of the carbonaceous material using the oxidizing environments, thus enlarging the initial perforations. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method comprising:
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(a) providing a wellbore able to access a coal-bearing formation;
(b) perforating the coal-bearing formation with a standard perforation charge, thereby creating perforations; and
(c) treating the perforations with a composition creating temporary local oxidizing environments comprising an oxidant in the perforations, and initiating combustion of carbonaceous material using the oxidizing environments, thus enlarging the perforations. - View Dependent Claims (12, 13, 14, 15, 16, 17)
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18. A method comprising:
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(a) contacting, through a wellbore, surfaces of cleats and fractures of a coal-bearing formation with a composition comprising, or that produces upon contact with the surfaces, localized temporary oxidizing environments in the fractures; and
(b) combusting carbonaceous material in the oxidizing environments under conditions sufficient to oxidize some of the carbonaceous material to enlarge the fractures. - View Dependent Claims (19, 20, 21)
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22. A method comprising:
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(a) providing a wellbore able to access a coal-bearing formation;
(b) injecting into the wellbore a composition creating temporary local oxidizing environments comprising an oxidant; and
(c) perforating the coal-bearing formation with a standard perforation charge, thereby creating perforations and initiating combustion of carbonaceous material using the oxidizing environments. - View Dependent Claims (23, 24, 25)
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Specification