Methods of isolating hydrajet stimulated zones
DCFirst Claim
1. A method of completing a well in a subterranean formation, comprising the steps of:
- (a) perforating a first zone in the subterranean formation by injecting a pressurized fluid through a hydrajetting tool into the subterranean formation, so as to form one or more perforation tunnels;
(b) initiating one or more fractures in the first zone of the subterranean formation by injecting a fracturing fluid into the one or more perforation tunnels through the hydrajetting tool;
(c) pumping additional fracturing fluid into the one or more fractures in the first zone through a wellbore annulus in which the hydrajetting tool is disposed so as to propagate the one or more fractures;
(d) simultaneous with step (c) moving the hydrajetting tool up hole; and
(e) repeating steps (a) through (d) in a second zone of the subterranean formation.
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Abstract
The present invention is directed to a method of isolating hydrajet stimulated zones from subsequent well operations. The method includes the step of drilling a wellbore into the subterranean formation of interest. Next, the wellbore may or may not be cased depending upon a number of factors including the nature and structure of the subterranean formation. Next, the casing, if one is installed, and wellbore are perforated using a high pressure fluid being ejected from a hydrajetting tool. A first zone of the subterranean formation is then fractured and stimulated. Next, the first zone is temporarily plugged or partially sealed by installing an isolation fluid into the wellbore adjacent to the one or more fractures and/or in the openings thereof, so that subsequent zones can be fractured and additional well operations can be performed.
170 Citations
10 Claims
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1. A method of completing a well in a subterranean formation, comprising the steps of:
- (a) perforating a first zone in the subterranean formation by injecting a pressurized fluid through a hydrajetting tool into the subterranean formation, so as to form one or more perforation tunnels;
(b) initiating one or more fractures in the first zone of the subterranean formation by injecting a fracturing fluid into the one or more perforation tunnels through the hydrajetting tool;
(c) pumping additional fracturing fluid into the one or more fractures in the first zone through a wellbore annulus in which the hydrajetting tool is disposed so as to propagate the one or more fractures;
(d) simultaneous with step (c) moving the hydrajetting tool up hole; and
(e) repeating steps (a) through (d) in a second zone of the subterranean formation. - View Dependent Claims (2, 3, 4, 5, 6)
- (a) perforating a first zone in the subterranean formation by injecting a pressurized fluid through a hydrajetting tool into the subterranean formation, so as to form one or more perforation tunnels;
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7. A method of completing a well in a subterranean formation, comprising the steps of:
- (a) perforating a first zone in the subterranean formation by injecting a pressurized fluid through a hydrajetting tool into the subterranean formation, so as to form one or more perforation tunnels;
(b) initiating one or more fractures in the first zone of the subterranean formation by injecting a fracturing fluid into the one or more perforation tunnels through the hydrajetting tool;
(c) pumping additional fracturing fluid into the one or more fractures in the first zone through a wellbore annulus in which the hydrajetting tool is disposed so as to propagate the one or more fractures;
(d) simultaneous with step (c) moving the hydrajetting tool up hole;
(e) terminating step (c); and
(f) repeating steps (a)-(c) in a second zone of the subterranean formation.
- (a) perforating a first zone in the subterranean formation by injecting a pressurized fluid through a hydrajetting tool into the subterranean formation, so as to form one or more perforation tunnels;
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8. A method of completing a well in a subterranean formation, comprising the steps of:
- (a) perforating a first zone in the subterranean formation by injecting a perforating fluid through a hydrajetting tool into the subterranean formation, so as to form one or more perforation tunnels;
(b) initiating a fracture in the one or more perforation tunnels by pumping a fracturing fluid through the hydrajetting tool;
(c) injecting additional fracturing fluid into the one or more fractures through both the hydrajetting tool and a wellbore annulus in which the hydrajetting tool is disposed, so as to propagate the one or more fractures;
(d) plugging at least partially the one or more fractures in the first zone with an isolation fluid;
(e) moving the hydrajetting tool away from the first zone; and
(f) repeating steps (a) through (c) for a second zone. - View Dependent Claims (9, 10)
- (a) perforating a first zone in the subterranean formation by injecting a perforating fluid through a hydrajetting tool into the subterranean formation, so as to form one or more perforation tunnels;
Specification