Infinity dissolvable plug-and-perf system uses degradable fracturing balls and seats instead of plugs to isolate zones during stimulation. The versatile system is suitable for cemented, uncemented, vertical, deviated, or horizontal applications in shale, sandstone, dolomite, and other lithologies.
The Infinity* dissolvable plug-and-perf system is a fullbore interventionless multistage stimulation system that uses degradable seats instead of plugs to isolate zones. After all stages are stimulated, the seat assemblies remove themselves, dissolving completely and predictably after contact with common completion fluids. The well is left with fullbore access, and immediate production is possible.
Well types
The system can be used in any type of well and is especially suitable for extended-reach wells and wells in under-pressured reservoirs, where mechanical interventions can be challenging.
Simple design and operation
The Infinity system is simpler than conventional plugs. It works in any well design and is deployed as part of a standard wireline perforating operation. The components are non hazardous and degrade on contact with common completion fluids. No special additives are required, and no mechanical intervention is required.
Fully degradable alloy
The patented aluminum-based ELEMENTAL technology’s alloy ball and lower seat degrade completely and predictably, leaving fullbore access. Having no restrictions in the wellbore maximizes flow potential and simplifies any future operations in the well.
Interventionless operations
With no plugs to mill out or to become stuck, this interventionless system is more cost-effective than conventional plug-and-perf operations, and the risks associated with mechanical interventions are eliminated.
The Infinity system can be run with the KickStart* rupture disc valve. Adding this starter valve eliminates the need for CT deployment during the first stage of a plug-and-perf operation, which makes operations possible in remote locations and saves time and costs.
Faster time to market
Eliminating milling reduces the time between drilling and production. On multiwell pads, by the time drilling on the pad is complete, the first wells are ready to flow back and be placed on production, providing faster time to market.
Access fullbore production ID
The patented aluminum-based material degrades completely and predictably within hours or days, ensuring that production reaches its full potential. No additives are required. Fullbore access also increases the options available for post-fracturing evaluation and future production intervention.
Eliminate mechanical intervention
No plugs means no mechanical intervention is required to mill them out. Running the Infinity system in combination with the cemented multistage fracturing further eliminates the need for the tubing- or CT-conveyed perforating gun to fracture-stimulate the first stage of a plug-and-perf operation. The result is reduced expenditure of time and money. Operations are possible in remote locations with no access to mechanical intervention units.
Increase reservoir contact
The lateral length is restricted by the capabilities, costs, and length of CT for effective milling. Eliminating post-fracturing CT intervention removes limits on the length of the lateral, maximizing reservoir contact and estimated ultimate recovery (EUR).
Remove risks associated with mechanical intervention
In depleted reservoirs it is difficult to manage the removal of milling debris, increasing costs and the risks of getting stuck. Rigging mechanical intervention equipment up and down carries its own risks.
Reach market quicker
Eliminating milling considerably reduces the time between drilling and production. On multiwell pads by the time drilling on the pad is complete, the first wells are ready to flow back and be placed on production, providing faster access to revenue.
Increase reliability through advanced technology
The high-strength, impact-resistant alloy is stronger than conventional alloys. It withstands differential pressures up to 8,000 psi [55 MPa] and temperatures up to 350 degF [177 degC]. It also has a proven record of performance at temperatures as low as 75 degF [24 degC].
Plug and Perforate is the number one stimulation technique used in unconventional reservoirs. This solution relies on the sequential pump-down conveyance and placement of plugs using Wireline to temporarily isolate sections of the well to be hydraulically fractured. After all the stimulation stages are concluded, plug removal is necessary to enable production. A milling assembly must then be passed into the well, usually by Coiled Tubing, to remove the restrictions used during the stimulation.
The inherent need for Coiled Tubing when using Plug and Perforate technique limits the process itself. This costly operation is required at the end of every well, as well as every time that a plug unintentionally pre-sets. In addition, on long horizontal wells, plug conveyance may be possible, but plug removal may not be possible. This is also true for wells with low reservoir pressure, where the risk of milling out plugs increases significantly. As an industry response, technologies based on dissolvable material have emerged as preferred solutions for increasing efficiencies and reducing operational risks. Degradable composite plugs, big bore plugs and cemented sliding sleeves are among the most notable. Nevertheless, these technologies are only partial solutions and often have major components that are not capable of being dissolved, having only incomplete dissolution. In addition, these technologies can be difficult to remove in the event of a pre-set, or after stimulation in case a later intervention is needed in the well.
A new fully degradable plug and perforate technology has been developed to solve the problems mentioned above. This new innovative method relies on material dissolution to avoid the need to mill out plugs. During fracturing, the new method follows the isolation process of the Plug and Perforate technique. After all stages are stimulated, the seat assemblies (or plugs) remove themselves by simple contact with flow back water; no mechanical remediation is needed. Immediate production is possible and the well is left with a full-bore ID. The ultimate production potential of the reservoir can be achieved as the complete assembly degrades away, leaving no restrictions in the well that can choke production and can prove problematic during any future workover intervention.
APPLICATIONS
1. Multistage stimulation operations in shale, sandstone, dolomite, and other lithologies;
2. All well types: openhole, cased-hole, vertical, deviated, and horizontal;
3. Extended-reach wells and under-pressured reservoirs.
BENEFITS
1. Simple design reduces risks and enhances efficiency;
2. Elimination of milling out;
a. lowers costs;
b. streamlines operations;
c. eliminates risks and costs of stuck plugs;
d. decreases time to production;
3. Components dissolve completely and predictably, leaving no restrictions to impede future operations.
FEATURES
1. Made of high-strength, impact-resistant ELEMENTAL* degradable technology for fracturing at higher pressures and longer intervals;
2. Simpler than conventional plugs;
3.Rated to 10,000 psi [69 MPa] and 350 degF [177 degC];
4. It also has a proven record of performance at temperatures as low as 75 degF [24 degC];
5. Deployed as part of standard wireline perforating operations, with ball conveyed at the beginning of stimulation activity via pump down operations.
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