The present application is a U.S. National Stage Application of International Application No. PCT/US2016/047841 filed Aug. 19, 2016, which is incorporated herein by reference in its entirety for all purposes.
The present disclosure relates generally to systems and methods for servicing a wellbore, for example, utilizing electrically actuated explosives downhole and, more particularly (but not exclusively), utilizing electrically actuated explosives to induce perforations downhole, plug and abandon a wellbore or both.
Hydrocarbons, such as oil and gas, are commonly obtained from subterranean formations that may be located onshore or offshore. The development of subterranean operations and the processes involved in removing hydrocarbons from a subterranean formation are complex. Typically, subterranean operations involve a number of different steps such as, for example, drilling a wellbore at a desired well site, treating the wellbore to optimize production of hydrocarbons, and performing the necessary steps to produce and process the hydrocarbons from the subterranean formation.
Hydraulic fracturing (or “fracking”) may be used to stimulate the production of hydrocarbons from subterranean formations penetrated by a wellbore. A fluid may be pumped through the wellbore and injected into a zone of a subterranean formation to be stimulated at a rate and pressure such that fractures are formed and extended into the subterranean formation. Proppant may be positioned in the fractures with the fluid to help prevent the fracture from completely closing. The proppant is then left in the fracture while the fluid is removed. The proppant may hold the fracture open to create a path for fluids from a reservoir in the zone of the subterranean formation (for example, oil, gas, water, etc.) to flow and be recovered from the wellbore. Proppants are selected based one or more characteristics to provide the best flow path for the fluids. For example, the proppant may have a sufficient strength such that the proppant can hold the fracture open without being crushed. Sand is often selected as a proppant as it is economical and readily available, but other proppants, such as walnut shells, ceramics, glass, bauxite, steel or iron balls, crushed iron ore or slage, have been used for many operations. Unusual solids, such as acid based solids, may also be used to help open a fracture and control fluid flow placement. After an operation, the acid based solids will convert into an acid. The fluid flow path may also be created chemically by using an acid as the fracturing fluid and proppant. In this approach, acids may maintain the opening of one or more fissures caused by the fracturing by etching the surfaces of fissures in a formation unevenly, thus creating large channels when the fissures close. While well stimulation by hydraulic fracturing has been successful, it can be expensive because of the various and complex equipment required to generate the relatively enormous downhole hydraulic pressures, which may exceed 10,000 pounds per square inch (p.s.i.). In addition, hydraulic fracturing can be a relatively lengthy process to undertake.
Fracturing may involve placing an explosive charge downhole and detonating the explosive charge to shatter a formation and thereby permit hydrocarbons to flow through the formation to the well. In general, explosive fracturing involves using pure nitroglycerin which is a volatile, dangerous and sensitive explosive. In some operations, explosive fracturing techniques involve using explosive liquids which are pumped into the pores of the formation and are thereafter detonated. Explosive fluids may also include mixtures of oxygen and fuel, or other unstable chemical mixtures as well. These explosive liquids may be sensitive to shock, static electricity, heat or other elements. Further, these explosive liquids may be expensive and may be prone to safety issues.
Whatever the type of materials used in the fracturing process, it may be necessary to determine one or more characteristics of the fracture to identify the effectiveness of the fracture and treatment parameters for future fracturing operations. Many times, wells are cased, for example constructed using a large strong steel pipe able to support the well and prevent the well from collapsing. To dispose the fracturing fluid in the formation, the wellbore steel wall must be perforated before a fracture may be created in the formation.
Not only are fractures beneficial for extracting hydrocarbons from a formation, but also perforations in a formation adjacent to a wellbore may aid in well repair and even the plug and abandonment process of a well. In well repair, perforations may be placed near the areas where the suspected leaks are detected. In well abandonment perforations or slots may need to be created at intervals along the wellbore where competent rock exists. In either well repair or plug and abandonment, a fine cement slurry may be squeezed into each slot at each interval so as to create a cement plug that is in contact with the competent rock. This creates a barrier between a downhole substance and the surface. For example, such plugging or squeezing prevents potentially polluting substances from reaching the surface or other area.
Certain aspects and examples of the present disclosure relate to using digital propulsion methods to perforate and fracture stimulate a subterranean formation adjacent to a wellbore. An electrically actuated, excited or ignited charge carrier, for example, a perforating gun, may be utilized to create the necessary or intended perforations and fractures, well repair, to plug and abandon a wellbore or any combination thereof. Actuated, excited or ignited may be used interchangeably herein. Because the charge carrier comprises electrically actuated explosive material, the charge carrier has greater stability than traditional explosives used downhole. The electrically actuated, excited, or ignited explosive material is designed not to ignite due to percussive energy, vibrations, radio waves, flames, or any other non-electrical energy. As a result, unintended explosions are reduced and the health and safety of individuals is safeguarded. Also, more control may be exerted over the type of perforations or fractures and the time intervals associated with the creation of such perforations or fractures. The effect of the explosion may be maximized while minimizing damage by controlling the electric excitation of the electrically actuated explosive material. The electrically actuated explosive material may be reignited multiple times until the explosive material is depleted. Multiple holes or slots may be created in the formation by electrically actuating multiple charge carriers or electrically actuating the same charge carrier multiple times. The electrically actuated charge carrier may be deployed in a wellbore during fracturing, during plug and abandonment or both.
The electrically actuated explosive material within a charge carrier may be the material provided by Digital Solid State Propulsion, Inc. or discussed in U.S. Pat. Nos. 7,958,823, 8,464,640, 8,617,327, 8,888,935, U.S. patent application Ser. Nos. 10/136,786 and 10/423,072 or any other similar material. The electrically actuated explosive material may be a liquid or solid or any combination thereof.
The charge carrier may be injected into the wellbore during any suitable downhole operation. For example, in one embodiment the charge carrier may be deployed downhole to facilitate a fracturing operation such as to create a fracture into a subterranean formation adjacent to the wellbore. The charge carrier may include a shaped charge configured to explode, or otherwise ignite, in response to an electrical signal. In one or more embodiments, the charge carrier may be deployed downhole for stimulating a hydrocarbon-producing formation, during a plug and abandonment process to aid in filling any openings into the formation, wellbore repair, or for any other suitable operation.
Detailed descriptions of certain examples are discussed below. These illustrative examples are given to introduce the reader to the general subject matter discussed here and are not intended to limit the scope of the disclosed concepts. The following sections describe various additional aspects and examples with reference to the drawings in which like numerals indicate like elements, and directional descriptions are used to describe the illustrative examples but, like the illustrative examples, should not be used to limit the present disclosure. The various figures described below depict examples of implementations for the present disclosure, but should not be used to limit the present disclosure.
For purposes of this disclosure, an information handling system may include any instrumentality or aggregate of instrumentalities operable to compute, classify, process, transmit, receive, retrieve, originate, switch, store, display, manifest, detect, record, reproduce, handle, or utilize any form of information, intelligence, or data for business, scientific, control, or other purposes. For example, an information handling system may be a personal computer, a network storage device, or any other suitable device and may vary in size, shape, performance, functionality, and price. The information handling system may include random access memory (RAM), one or more processing resources such as a central processing unit (CPU) or hardware or software control logic, ROM, and/or other types of nonvolatile memory. Additional components of the information handling system may include one or more disk drives, one or more network ports for communication with external devices as well as various input and output (I/O) devices, such as a keyboard, a mouse, and a video display. The information handling system may also include one or more buses operable to transmit communications between the various hardware components. The information handling system may also include one or more interface units capable of transmitting one or more signals to a controller, actuator, or like device.
For the purposes of this disclosure, computer-readable media may include any instrumentality or aggregation of instrumentalities that may retain data and/or instructions for a period of time. Computer-readable media may include, for example, without limitation, storage media such as a direct access storage device (for example, a hard disk drive or floppy disk drive), a sequential access storage device (for example, a tape disk drive), compact disk, CD-ROM, DVD, RAM, ROM, electrically erasable programmable read-only memory (EEPROM), and/or flash memory; as well as communications media such wires, optical fibers, microwaves, radio waves, and other electromagnetic and/or optical carriers; and/or any combination of the foregoing.
Illustrative embodiments of the present disclosure are described in detail herein. In the interest of clarity, not all features of an actual implementation may be described in this specification. It will of course be appreciated that in the development of any such actual embodiment, numerous implementation-specific decisions must be made to achieve the specific implementation goals, which will vary from one implementation to another. Moreover, it will be appreciated that such a development effort might be complex and time-consuming, but would nevertheless be a routine undertaking for those of ordinary skill in the art having the benefit of the present disclosure.
Throughout this disclosure, a reference numeral followed by an alphabetical character refers to a specific instance of an element and the reference numeral alone refers to the element generically or collectively. Thus, as an example (not shown in the drawings), widget “1A” refers to an instance of a widget class, which may be referred to collectively as widgets “1” and any one of which may be referred to generically as a widget “1”. In the figures and the description, like numerals are intended to represent like elements.
To facilitate a better understanding of the present disclosure, the following examples of certain embodiments are given. In no way should the following examples be read to limit, or define, the scope of the disclosure.
Various aspects of the present disclosure may be implemented in various environments. For example,
A charge carrier (or detonation section) 120 may also be positioned or deployed downhole. In one or more embodiments, charge carrier 120 may be positioned along, included with or coupled to the tubing string 106, a bottom-hole assembly, or any other suitable downhole deployment device or tool. Charge carrier 120 may comprise an electrically actuatable or ignitable and electrically controllable explosive material (EIECEM).
An EIECEM may comprise any suitable electrically ignitable propellant or explosive. An EIECEM may comprise an ionomer oxidizer polymer binder, an oxidizer mix including at least one oxidizer salt and at least one eutectic material. For example, an ionomer oxidizer binder may be polyvinylammonium nitrate, the oxidizer salt may be ammonium nitrate, and the eutectic additive may comprise a variety of salts or mixtures thereof, and preferably may comprise an energetic material such as ethanolamine nitrate, ethylene diamine dinitrate, or other alkylamine or alkoxylamine nitrate, or any other suitable mixture or admixtures thereof. Other suitable electrically ignitable propellant may comprise a heat-treated copolymer of polyvinylalcohol (PVA)/polyvinylamine PVAN) binder, a hydroxylamine nitrate based oxidizer, a 5-aminotetrazole stabilizer, and a dipyridyl complexing agent. Boric acid may be used as a crosslinking agent and may be dissolved in the mixture to thus crosslink the heat-treated PVA/PVAN copolymer. The heat-treated mixture may be cooled and then cured by a heat treatment. The EIECEM is electrically controllable such that the EIECEM is only explosive during actuation or inducement from an electrical source, such as inducement or excitement of an electrical charge, electrical current or electrical signal. For example, an explosion is created for a duration of the electrical charge, electrical current or electrical signal at the EIECEM.
Charge carrier 120 may be coupled via an electrical connection 122 to a control unit 118 at the surface 104. In one or more embodiments, control unit 118 may be positioned downhole or remote from the wellbore environment 100. An electrical charge or electrical current may be induced by the control unit 118 and transmitted as an electrical signal to the charge carrier 120 to actuate the EIECEM. The control unit 118 may be electrically coupled to the charge carrier 120 via a detonator cable, a single line or wire, a plurality of lines or wires, or any other suitable coupling. The electrical coupling may be any material suitable for conveying an electrical signal. The control unit 118 may pulse electrical signals or send a constant electrical signal to the charge carrier 120 via electrical connection 122. In one or more embodiments, electrical connection 122 may be a wireline, one or more cables, or any other suitable conductive wire or connection. Short electrical pulses may result in small explosions by the charge carrier 120 as compared to longer sustained electrical pulses. Applying short electrical pulses allows for relocation or reorientation of the charge carrier 120. In one or more embodiments, the duration of short electrical pulses may range from less than about 0.01 seconds or may be range from about 0.000001 to about 0.01 seconds, or from about 0.000002 to about 0.009 seconds or from about 0.000005 to about 0.005 seconds, or any other suitable duration for a given operation. While only one charge carrier 120 is shown, any number of charge carriers 120 (or containers 600 as illustrated in
Modifications, additions, or omissions may be made to
Memory controller hub 202 may include a memory controller for directing information to or from various system memory components within the information handling system 200, such as memory 203, storage element 206, and hard drive 207. The memory controller hub 202 may be coupled to memory 203 and a graphics processing unit 204. Memory controller hub 202 may also be coupled to an I/O controller hub or south bridge 205. I/O hub 205 is coupled to storage elements of the information handling system 200, including a storage element 206, which may comprise a flash ROM that includes a basic input/output system (BIOS) of the computer system. I/O hub 205 is also coupled to the hard drive 207 of the information handling system 200. I/O hub 205 may also be coupled to a Super I/O chip 208, which is itself coupled to several of the I/O ports of the computer system, including keyboard 209 and mouse 210.
While shaped object 340 is illustrated as a cone shape, the present disclosure contemplates that shaped object 340 may be of any suitable shape or size. The shaped object 340 is coupled to the shell 310 via a bottom insulator 350. The bottom insulator 350 may be a ceramic insulator or any other type of insulator that electrically isolates the shaped object 340 from the shell 310. The bottom insulator 350 and the shell 310 may be coupled using any suitable technique including, but not limited to, a molding process, clamps, adhesives, other techniques, or any combination thereof.
The shell 310 may comprise a material that permits an electrical current to be transmitted to the EIECEM 320. For example, an electrode 360A may be coupled to the shell 310 and another electrode 360B may be coupled to the shaped object 340 such that an electrical current may be induced or that the electrodes 360 may be energized so as to initiate combustion or an explosion of the EIECEM 320 for the duration of the electrical current. While
The shaped object 340 may be insulated from the EIECEM 320 via an inner insulator 330. Inner insulator 330 may be designed to insulate any portion of the shaped object 340 from the EIECEM 320. For example, as illustrated in
In one or more embodiments, the induced electrical charge, induced electrical current, or induced electrical signal is constant such that a single explosion of the EIECEM 320 occurs similar to the behavior of a conventional gun or perforator. As used throughout the present disclosure, electrical charge, electrical current or electrical signal may refer to herein any signal that is capable of actuating, igniting, exciting or otherwise causing the EIECEM 320 to explode or detonate in all or in part. A constant electrical signal, electrical charge or electrical current may almost instantaneously burn away the insulator 330, exposing the entirety of the EIECEM 320 so that the EIECEM 320 is ignited or actuated as a singular or substantially singular explosion. In contrast, a pulsed electrical signal, electrical charge or electrical current causes several explosions of the EIECEM 320 as the inner insulator 330 is burned off, melted away, or otherwise consumed from the shaped object 340 which allows more electrical charge or electrical current to flow across or into the EIECEM 320. When the electrical signal, electrical charge or electrical current is removed, the explosion of the EIECEM 320 stops such that each additional electrical pulse causes an additional explosion of the EIECEM 320. The electrical pulsing will eventually explode the entire EIECEM 320. The electrical pulsing may occur at any timed interval or schedule and for any suitable duration. The explosion, to a certain extent, of the charge carriers 300 may be controlled by the sequence and duration of electrical pulses or induced electrical charge, induced electrical current or induced electrical signals. In conventional single shot systems, a hole opening or perforation from an explosion may be small and possible plugged with debris. In contrast, providing a slower explosion provided by the shaped charge 300 allows the perforation tip of the shaped object 340 to collapse, pushing the gas and debris outward, which is then rapidly pushed back by a second shot. Generally, this results in the base of the hole opening to be larger which is more effective in allowing fractures to extend from the opening.
In one or more embodiments, the electrode 360A is coupled to a busbar (not shown) that electrically connects the electrode 360A to a power source. A busbar may permit multiple shaped charges 300 to be excited such that the EIECEM 320 of each shaped charge 300 is ignited or actuated instantaneously or at substantially the same time. In one or more embodiments, the electrode 360B is coupled to a single wire or line that is coupled to a power source so that the associated shaped charge 300 may be excited independently of any other shaped charges 300 such that the EIECEM associated with each shaped charge 300 is independently ignited. Electrode 360B may be coupled to a common ground (not shown) or to a separate ground. In one or more embodiments, common ground may comprise a tool body such as a bottom-hole assembly or any other downhole tool that may be used to deploy the shaped charge 300. In one or more embodiments, the charge carrier 120 may be deployed or disposed at any location along the wellbore 108 and the shaped charges 300 may be ignited at any one or more locations along the wellbore 108.
In one or more embodiments, each electrode 360A, 360B or any combination thereof associated with shaped charges 300 of a group may be coupled to the same source or wire. For example, each shaped charge 300 in all groups may be coupled to the same ground (for example, 360B) while each positive electrode 360A of each shaped charge 300 may be coupled to a source that is associated with a particular group such that each group may be controlled independently of any other group. For example, Group 1 shaped charges 300 may be coupled by a common first wire that carries a first electrical charge, electrical current or electrical signal while Group 2 shaped charges 300 may be coupled by a common second wire that carries a second electrical charge, electrical current or electrical signal.
In one or more embodiments, the shaped charges 300 may be coupled to a multiplexer or switch that permits excitation of a specific shaped charge 300 or group of shaped charges 300. For example, a computing device or information handling system such as a control unit 118 may comprise or be coupled to a multiplexer and the multiplexer may be coupled to the electrodes 360A of each of the shaped charges 300 within a charge carrier 120. The control unit 118 may send a signal to the multiplexer selecting a specific or particular one or more shaped charges 300 for excitation. In one or more embodiments, any other device or mechanism may be utilized to select or activate (for example, actuate) any one or more shaped charges 300. In one or more embodiments, the control unit 118 may comprise a power source that provides an electrical charge, electrical current or electrical signal to electrodes 360A. In one or more embodiments, a power source may be provided downhole and activated by a control unit 118 where control unit 118 may be located at the surface 104, remotely, or within the wellbore 108.
In one or more embodiments, the container 600 may be used as a carrier for shaped charges 300. In one or more embodiments, an electrically sensitive or ignitable and electrically controllable explosive material (EIECEM) 610, similar to or the same as EIECEM 320, may be disposed within the interior of container 600 in addition to the shaped charges 300. The busbar 620 acts as a conductor and may be electrically isolated from the container 600 so as not to form a short circuit as the container 600 acts as a ground for electrodes 360B. Excitation of the busbar 620 induces an electrical charge, an electrical current or an electrical signal to flow from the busbar 620 through the EIECEM 610 to the ground 360B causing an explosion of the EIECEM 610 and also causing an explosion of the EIECEM 320 of the shaped charges 300. Such a design is especially effective for wellbore environments 100 where a perforation or fracture 112 has already occurred within formation 110. The additional explosion from the EIECEM 610 creates a high pressure pulse that helps initiate a perforating gun (such as a StimGun™) effect; the shaped charges 300 are pushed out of the charge carriers 120 with greater energy. In one or more embodiments, the EIECEM 610 may be actuated or ignited before, after, at the same time as or any combination thereof the shaped charges 300 are actuated or ignited.
In one or more embodiments, container 600 comprises a plurality of charge carriers 120. Charge carrier 120A comprises a first busbar 620A (or conductor or electrode 360A) common to each shaped charge 300 (for example, shaped charges 300A-300N) within the charge carrier 120A. A charge carrier 120N comprises a second busbar 620B (or conductor or electrode 360C) common to each shaped charge 300 within the charge carrier 120N. The busbar 620A may be excited or actuated separately and independently from the busbar 620B. A busbar 620 may be a wireline or any other suitable connection for delivering an electrical charge, electrical current or electrical signal.
The Texas-Two-Step approach according to aspects of the present disclosure involves hydrajetting and then fracturing by actuating the shaped charge carriers 300 of container 600A at location 1; hydrajetting and then fracturing by actuating the shaped charge carriers 300 of container 600B at location 2; hydrajetting and then fracturing by actuating the shaped charge carriers 300 of container 600C at location 3. Due to the generation of fractures at location 1 and location 2, local stresses have been modified by the previous fracture(s) as describe by the multi-oriented hydraulic fracturing (MOHF) and the resulting fracture or fractures are initiated longitudinally.
In one or more embodiments, the Texas-Two-Step approach illustrated in
In one or more embodiments, a container 600A is positioned at a first location within the wellbore 108 where a leak 809A, 809B or both has occurred behind casing 804. As only a single casing 804 need be penetrated, the container 600A may not be filled with EIECEM 610. A single excitation or actuation of the shaped charges 300 may sufficiently create a perforation 807A and a perforation 807B so that a cement 803 may be squeezed into the perforation 807 to create seals 805A and 805B to seal the leak. In one or more embodiments the cement 803 may be a fine cement (for example MicroMatrix) or a resin (for example, WellLock).
In one or more embodiments, a container 600B is positioned at a second location within the wellbore 108 where a leak 809C, a leak 809D, a leak 809E, a leak 809F or any combination thereof has occurred behind a second casing 802. As two casings must be penetrated, the container 600B may contain EIECEM 610. The container 600B may be oriented differently or offset from container 600A by any number of degrees. The container 600B may be excited or actuated in any manner, for example, any one or more aspects of the present disclosure. For example, the shaped charges 300 of container 600B (for example, as illustrated in
Generally, a plug and abandonment (P&A) process requires a perforation, preferably slot-shaped, to communicate to the formation around a wellbore. A fine cement slurry may then be squeezed into the cavity of the wellbore along with a cement plug. For example, in North Sea Operations, three competent rock layers must be found and cement plugs must be injected with each cement plug completely touching a corresponding competent rock layer.
A sealing device 820 may be installed or positioned within wellbore 108. In one or more embodiments, the sealing device 820 may comprise a bridge plug, a packer or any other device that is configured to isolate a section or a portion of the wellbore 108. The sealing device 820 may be installed using a coiled tubing (not shown) or any other suitable deployment mechanism or tool. An explosive 810 is inserted or positioned on top of the sealing device 820. For example, the coiled tubing may be circulated to deposit the explosive 810 on top of or above the sealing device 820. The explosive 810 may be a pill of liquid explosive that is electrically ignitable and electrically controllable, such as EIECEM 310 or EIECEM 610. The explosive 810 may be actuated or excited by the electrode 360A, 360B or by any other electrical source or combination thereof. The explosive 810 may be in contact with, coupled to, disposed about, interface with or otherwise be disposed at or near the sealing device 820. The coiled tubing may be removed or pulled out of the wellbore 108 after deployment of the sealing device 820.
Any number of containers 600 or charge carriers 120 comprising any number of shaped charges 300 may be deployed or positioned within the wellbore 108. In one or more embodiments, one or more containers 600 or charge carriers 120 may form a cluster and one or more clusters may be disposed within the wellbore 108. The container 600 may have 50 clusters of charge carriers 120 with one or two clusters per meter. In one or more embodiments, more or fewer clusters may be deployed with any number of clusters per any depth within the wellbore 108 as required by a specific operation. In one or more embodiments, the shaped charges 300 of charge carriers 120 may be aligned or disposed longitudinally along the charge carriers 120 so as to produce a perforating gun effect where perforations or fractures 710 are made in a linear pattern. In one or more embodiments, a plurality of clusters of charge carriers 120 each comprise a plurality of charge carriers 120 positioned at one or more layers.
For example,
While
Returning to
In one or more embodiments, a first explosion may comprise actuating or exciting substantially simultaneously, sequentially or any combination or order thereof any one more shaped charges 300 of any one or more containers 600 by, for example, electrifying one or more electrodes 360. A second explosion may comprise actuating or exciting an EIECEM 610 of the one or more containers 600 by, for example, electrifying the busbar 620 and grounding the container 600. A third explosion may comprise actuating or exciting an EIECEM 610 between the casing 802 or 804 or both by for example, electrifying the container 600 and using the formation 110 as an electrical ground. An explosion of the explosive 810 burns all casing strings or tubing strings 106 and cement 830. All tools, containers 600 or other downhole devices may be pulled out of the wellbore 108 and a coiled tubing or any other suitable mechanism may be deployed to inject a sealing fluid into the wellbore 108. The sealing fluid will fill in one or more cavities within the wellbore 108, for example, the perforations or fractures 710, and form a bond or be in contact with multiple layers or competent rock so as to seal the wellbore 108 and prevent any potential pollutants or downhole materials, fluids or gases from escaping or interspersing to other areas of the formation 110 or to the surface 104. The sealing fluid may comprise a solidifyable fluid. The solidifyable fluid may comprise one or more of a cement, an elastomer, a polymer, a particulate filled fluid, or any combination or mixture thereof.
As illustrated in
In one or more embodiments, a method of repairing or plugging and abandoning a wellbore using electrically ignitable and electrically controllable explosive material (EIECEM) comprises positioning a shaped charge in the wellbore, wherein the shaped charge comprises a first EIECEM, disposing a sealing device below the shaped charge, inducing a first electrical current at the shaped charge to ignite the first EIECEM to cause the first EIECEM to create a first explosion for a first duration of the first electrical current and injecting a sealing fluid into the wellbore, wherein the injected sealing fluid is configured to fill in one or more cavities of the wellbore. In one or more embodiments, the method further comprises disposing a second EIECEM above the sealing device and inducing a second electrical current at the second EIECEM to ignite the second EIECEM to cause the second EIECEM to create a second explosion during a second duration of the second electrical current. In one or more embodiments, the method further comprises wherein the sealing fluid comprises a solidifyable fluid, and wherein the solidifyable fluid comprises one or more of a cement, one or more elastomers, one or more polymers and a particulate filled fluid. In one or more embodiments, the method further comprises wherein the shaped charge comprises a plurality of shaped charges, and wherein the plurality of shaped charges is arranged in a plurality of layers. In one or more embodiments, the method further comprises wherein each layer of the plurality of layers comprises at least a plurality of shaped charges of the plurality of shaped charges oriented at a predetermined phase from each other. In one or more embodiments, the method further comprises wherein each layer of the plurality of layers is disposed at a predetermined distance from each other. In one or more embodiments, the method further comprises wherein the shaped charge is ignited based on a predetermined sequence. In one or more embodiments, the method further comprises wherein the shaped charge comprises a plurality of shaped charges aligned longitudinally to create a slot-shaped perforation when the first EIECEM associated with each of the plurality of shaped charges is ignited by the first electrical current. In one or more embodiments, the method further comprises wherein inducing the first electrical current at the shaped charge comprises inducing a first electrical current at the shaped charge for a first time interval, delaying a second time interval and inducing a second electrical current at the shaped charge for a third time interval. In one or more embodiments, the method further comprises disposing a third EIECEM between a first casing and a second casing of the wellbore and inducing a third electrical current at the third EIECEM to ignite the third EIECEM to cause the third EIECEM to create a third explosion during a third duration of the third electrical current.
In one or more embodiments, a system comprises a shaped charge disposed in a wellbore, a first electrically ignitable and electrically controllable explosive material (EIECEM) disposed within the shaped charge, a sealing device disposed below the shaped charge, wherein the shaped charge is configured to ignite the first EIECEM to cause the first EIECEM to create a first explosion when a first electrical current is induced at the shaped charge during a first duration of the first electrical current and a sealing fluid disposed within the wellbore, wherein the sealing fluid is configured to fill in one or more cavities of the wellbore. In one or more embodiments, the system further comprises disposing a second EIECEM above the sealing device, wherein the second EIECEM is configured to ignite and create a second explosion when a second electrical current is induced at the second EIECEM during a second duration of the second electrical current. In one or more embodiments, the system further comprises wherein the sealing fluid comprises a solidifyable fluid, and wherein the solidifyable fluid comprises one or more of a cement, one or more elastomers, one or more polymers and a particulate filled fluid. In one or more embodiments, the system further comprises a container, wherein the container comprises the charge carrier and a conductor coupled to the container and disposed through the container, wherein the conductor is electrically insulated from the container, and wherein the conductor is configured to transmit the induced first electrical current to the shaped charge. In one or more embodiments, the system further comprises a third EIECEM disposed within the container, wherein the third EIECEM is configured to ignite when a third electrical current is induced at the container to create a third explosion during a third duration of the third electrical current. In one or more embodiments, the system further comprises wherein the shaped charge comprises a plurality of shaped charges, and wherein the plurality of shaped charges is configured to form a plurality of layers. In one or more embodiments, the system further comprises wherein each layer of the plurality of layers comprises at least a plurality of shaped charges of the plurality of shaped charges oriented at a predetermined phase from each other. In one or more embodiments, the system further comprises wherein each layer of the plurality of layers is disposed at a predetermined distance from each other. In one or more embodiments, the system further comprises wherein the shaped charge comprises a plurality of shaped charges aligned longitudinally to create a slot-shaped perforation when the first EIECEM associated with each of the plurality of shaped charges is ignited by the first electrical current. In one or more embodiments, the system further comprises an electrode coupled to the shaped charge, wherein the electrode is configured to conduct the first electrical current to the shaped charge.
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PCT/US2016/047841 | 8/19/2016 | WO | 00 |
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WO2018/034674 | 2/22/2018 | WO | A |
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