METHOD AND APPARATUS FOR ENHANCING THE PRODUCTIVITY OF WELLS
First Claim
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1. A method for enhancing the productivity of a fractured subterranean formation that includes:
- a) isolating a zone of a wellbore that has been drilled into the subterranean formation to form an isolated zone;
b) preparing a liquid chemical rock splitting agent composition and injecting it into the isolated zone and then into the subterranean formation;
c) allowing the chemical rock splitting agent to expand and/or harden; and
d) removing the agent from the formation.
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Abstract
The invention relates to a hydrocarbon production stimulation method which can be used in new reservoirs and in reservoirs that have been previously fractured (e.g., by hydraulic fracturing) or that have naturally occurring fractures. A zone of the wellbore is isolated, a liquid chemical rock splitting agent composition is injected into the isolated zone and then forced into the subterranean formation with an inert compressed gas, the chemical rock splitting agent is permitted to expand and harden, and the agent is then removed from the formation. A proppant may be used to hold fractures open.
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19 Claims
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1. A method for enhancing the productivity of a fractured subterranean formation that includes:
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a) isolating a zone of a wellbore that has been drilled into the subterranean formation to form an isolated zone; b) preparing a liquid chemical rock splitting agent composition and injecting it into the isolated zone and then into the subterranean formation; c) allowing the chemical rock splitting agent to expand and/or harden; and d) removing the agent from the formation. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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- 13. Use of a liquid chemical rock splitting agent composition to fracture a subterranean formation around an openhole wellbore.
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14. Use of a liquid chemical rock splitting agent composition to fracture a subterranean formation around a cased and perforated wellbore, wherein the liquid chemical rock splitting agent is injected inside the casing and then forced through the perforations in the casing, into the subterranean formation.
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