Inhibiting effects of sloughing in wellbores
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Abstract
Certain embodiments provide a method for treating a subsurface formation. The method includes providing one or more explosives into portions of one or more wellbores selected for the explosion in the formation. The wellbores are formed in one or more zones in the formation. The explosives are controllably exploded in one or more of the wellbores such that at least some of the formation surrounding the selected wellbores has an increased permeability. One or more heaters are provided in the one or more wellbores.
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Citations
141 Claims
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1-116. -116. (canceled)
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117. A method for treating a subsurface formation, comprising:
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providing one or more explosives into portions of one or more wellbores selected for the explosion in the formation, the wellbores formed in one or more zones in the formation;
controllably exploding the explosives in one or more of the wellbores such that at least some of the formation surrounding the selected wellbores has an increased permeability; and
providing one or more heaters in the one or more wellbores. - View Dependent Claims (118, 119, 120, 121, 122, 123, 124, 125, 126, 127, 128, 129, 130, 131, 132, 133, 134, 135, 136, 137)
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138. A method for treating a hydrocarbon containing formation, comprising:
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providing heat from one or more heaters to at least a portion of the formation;
allowing the heat to transfer from one or more of the heaters to one or more zones of the formation; and
controlling heating of the zones of the formation such that a heating rate of one or more zones is maintained below 20°
C./day for at least about 15 days, thereby inhibiting sloughing of material proximate the heater during and/or subsequent to the heating.
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139. A method for treating a hydrocarbon containing formation, comprising:
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providing heat from one or more heaters to at least a portion of the formation, wherein at least one of the heaters is in at least one wellbore in the formation, wherein at least one of the wellbores has a liner placed between the heater in the wellbore and the formation, wherein the liner comprises openings that are sized such that fluids can pass through the liner but particles of a selected size cannot pass through the liner;
allowing the heat to transfer from the one or more heaters to a part of the formation; and
producing a mixture from the formation.
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140. A method for treating a hydrocarbon containing formation, comprising:
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providing heat from one or more heaters to at least a portion of the formation, wherein one or more of the heaters are in one or more of wellbores sized, at least in part, such that a space between the wellbore and one of the heaters in the wellbore has a width that inhibits particles of a selected size from freely moving in the space;
allowing the heat to transfer from the one or more heaters to a part of the formation; and
producing a mixture from the formation.
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141-536. -536. (canceled)
Specification