EP3245381B1 - System und verfahren für phasengesteuerte perforationspistole mit begrenzter eingabe - Google Patents

System und verfahren für phasengesteuerte perforationspistole mit begrenzter eingabe Download PDF

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Publication number
EP3245381B1
EP3245381B1 EP16737957.7A EP16737957A EP3245381B1 EP 3245381 B1 EP3245381 B1 EP 3245381B1 EP 16737957 A EP16737957 A EP 16737957A EP 3245381 B1 EP3245381 B1 EP 3245381B1
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Prior art keywords
charges
downward
preferred
upward
fracture
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English (en)
French (fr)
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EP3245381A4 (de
EP3245381A1 (de
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John T. HARDESTY
Nathan G. Clark
James A. Rollins
David S. Wesson
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Geodynamics Inc
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Geodynamics Inc
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Priority claimed from US14/598,868 external-priority patent/US9562421B2/en
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Publication of EP3245381A4 publication Critical patent/EP3245381A4/de
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    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
    • E21B43/11—Perforators; Permeators
    • E21B43/119—Details, e.g. for locating perforating place or direction
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
    • E21B43/11—Perforators; Permeators
    • E21B43/116—Gun or shaped-charge perforators
    • E21B43/117—Shaped-charge perforators

Definitions

  • the present invention relates generally to perforation guns that are used in the oil and gas industry to explosively perforate well casing and underground hydrocarbon bearing formations, and more particularly to an improved apparatus for explosively perforating a well casing and its surrounding underground hydrocarbon bearing formation in a preferred fracturing plane.
  • a gun string assembly is positioned in an isolated zone in the wellbore casing.
  • the gun string assembly comprises a plurality of perforating guns coupled to each other either through tandems or subs.
  • the perforating gun is then fired, creating holes through the casing and the cement and into the targeted rock. These perforating holes connect the rock holding the oil and gas and the well bore.
  • Hydrocarbon fracturing tunnels have certain preferred orientations where the effectiveness of extracting oil/gas is greatest i.e., when a perforation is aligned along the tunnels, oil/gas flows though the perforation tunnels without taking an alternate path that may become a restrictive path creating high tortuosity conditions.
  • Fractures will initiate and propagate in the preferred fracture plane of the formation.
  • Oriented perforating systems can be used to more closely align a plane of perforation tunnels with a preferred fracture plane. Misalignment between the preferred fracture plane and perforations in a well can result in significant pressure drop due to tortuosity in the flow path near the wellbore.
  • the perforations that are phased at 90 degrees to the preferred fracture plane create pinch points resulting in pressure loss and high tortuosity in the flow path.
  • Limited entry fracturing is based on the premise that every perforation will be in communication with a hydraulic fracture and will be contributing fluid during the treatment at the pre-determined rate. Therefore, if any perforation does not participate, then the incremental rate per perforation of every other perforation is increased, resulting in higher perforation friction. Therefore, there is a need to angle and space spaced charges to facilitate the limited entry fracturing process to achieve maximum production efficiency.
  • each perforation in limited entry is expected to be involved in the treatment. If all perforations are involved, and the perforations are shot with 60°, 90°, or 120° phasing, multiple fracture planes may be created, leading to substantial near wellbore friction and difficulty in placing the planned fracturing treatment. Therefore, there is a need for minimal multiple fracture initiations that do not create ineffective fracture planes.
  • 4 to 8 perforation holes are shot which will reconnect to the predominant fracturing plane during fracturing treatment. Some of the perforation tunnels cause energy and pressure loss during fracturing treatment which reduces the intended pressure in the fracture tunnels.
  • the fracture to initiate at the top and bottom first that has the least principal stress so that there is enough flow rates to propagate the fracture.
  • a perforating gun that perforates such that the fracture permeates radially to the direction of the wellbore.
  • a wellbore perforating device includes a plurality of shaped charges and a holder that holds the plurality of shaped charges so that upon detonation the charges intersect a common plane extending transversely to the holder.
  • a wellbore perforating device includes a plurality of shaped charges and a holder that holds the plurality of shaped charges so that upon detonation the charges intersect a common plane extending transversely to the holder.
  • Prior art US 8127848A discloses a method of perforating a wellbore by forming a perforation that is aligned with a reservoir characteristic, such as direction of maximum stress, lines of constant formation properties, and the formation dip.
  • the wellbore can be perforated using a perforating system employing a shaped charge, a mechanical device, or a high pressure fluid.
  • the perforating system can be aligned by asymmetric weights, a motor, or manipulation from the wellbore surface.
  • Prior art US 7913758A discloses a method for completing an oil and gas well completion.
  • the perforators (10, 11) may be selected from any known or commonly used perforators and are typically deployed in a perforation gun.
  • the perforators are aligned such that the cutting jets (12, 13) and their associated shockwaves converge towards each other such that their interaction causes increased fracturing of the rock strata.
  • the cutting jets may be also be aligned such that the cutting jets are deliberately caused to collide causing further fracturing of the rock strata.
  • a shaped charge liner with at least two concave regions, whose geometry is selected such that upon the forced collapse of the liner a plurality of cutting jets is formed which jets are convergent or are capable of colliding in the rock strata.
  • a plurality of cutting jets is formed which jets are convergent or are capable of colliding in the rock strata.
  • Prior art US 7303017A discloses a perforating gun assembly (60) for creating communication paths for fluid between a formation (64) and a cased wellbore (66) that includes a housing (84), a detonator (86) positioned within the housing (84) and a detonating cord (90) operably associated with the detonator (86).
  • the perforating gun assembly (60) also includes one or more substantially axially oriented collections (92, 94, 96, 98) of shaped charges. Each of the shaped charges in the collections (92, 94, 96, 98) is operably associated with the detonating cord (90).
  • adjacent shaped charges in each collection (92, 94, 96, 98) of shaped charges are oriented to converge toward one another such that upon detonation, the shaped charges in each collection (92, 94, 96, 98) form jets that interact with one another to create perforation cavities in the formation (64).
  • WO2014/179689 describes an orientable wellbore perforating device.
  • Some embodiments take the form of a perforating device having a loading tube with a plurality of apertures therein.
  • Shaped charges may be installed into the apertures using jackets. Each jacket holds one shaped charge and is insertable into the apertures. Upon insertion into the apertures the jackets orient the shaped charges to a selected orientation.
  • US2007/158109 describes an apparatus for use in perforating a well.
  • the apparatus has a plurality of explosive charges.
  • Each explosive charge is adapted to generate a perforation tunnel in the formation adjacent to the well.
  • explosive charges are oriented to create perforation tunnels that converge at a location within the formation in order to create a fracture initiation plane capable of mitigating or avoiding hydraulic fracturing complications.
  • US2010/269676 describes a wellbore perforating device that includes a plurality of shaped charges and a holder that holds the plurality of shaped charges so that upon detonation the charges intersect at a point lying on a common plane extending transversely to the holder.
  • the objectives of the present invention are (among others) to circumvent the deficiencies in the prior art and affect the following objectives:
  • the present invention in various embodiments addresses one or more of the above objectives in the following manner.
  • the present invention provides a system that includes a gun string assembly (GSA) deployed in a wellbore with shaped charge clusters.
  • GSA gun string assembly
  • the charges are spaced and angled such that, when perforated, they intersect at a preferred fracturing plane.
  • the fractures initiate at least principal stress location in a preferred fracturing plane perpendicular to the wellbore from an upward and downward location of the wellbore. Thereafter, the fractures connect radially about the wellbore in the preferred fracturing plane.
  • the fracture treatment in the preferred fracturing plane creates minimal tortuosity paths for longer extension of fractures that enables efficient oil and gas flow rates during production.
  • the present invention system may be utilized in the context of an overall limited entry phasing perforating method, wherein the phasing perforating gun system as described previously is controlled by a method having the following steps:
  • This invention provides an improved tool (gun) and method of installing shaped charges at variable angles within a carrier assembly in order to cause two or more perforating tunnels to intersect at a prescribed distance outside of the well casing. All known current methods require special tooling that have long and costly lead times and are deficient in actually securing the angle of intercept. Embodiments of tools of the invention help to ensure that the charges collide at the prescribed location outside of the casing.
  • the disclosed apparatus is comprised of a support strip that is welded or otherwise secured into a tubular support. The spacing between each charge on the support can be adjusted and the flat support base can be inserted at various angles within the support member to accurately control the point of intersection.
  • This flat surface provides a solid base for securing the shaped charge and the round tubing provide the structure needed to form a rigid geometric frame.
  • a flat support strip is described and preferred but concave or convex geometries can also be utilized as the support base to optimize charge performance. This system provides an improvement over other known embodiments by securely and accurately focusing the shaped charges at a variable distance into the formation.
  • the perforating tool of this invention comprises; a cylindrical barrel having angled circular cutouts for placement of shaped charges in shape, charge cases; support strips comprising metal strips with a centered hole to receive a shape charge case, wherein the shape charge case has a circumferential projection that will not pass through the hole and provides support for a shaped charge case on the strip; slots cut into the cylindrical barrel to support the edges of the support strips, cut at a predetermined angle to provide location for perforations from the shaped charges.
  • FIG. 1-5 there is illustrated the gun assembly, 100, of an embodiment of the invention.
  • the cylindrical gun body, 130 with the barrel (load tube) 126 disposed inside.
  • the barrel, 126 has multiple precision cut slots, 127 that allow the charge case 124 to be inserted into the barrel 126 and subsequently rest on the support strip 128.
  • the holes may be located on any side of the circumference of the barrel to achieve the desired target perforations.
  • the holes are preferably cut through the barrel wall at an angle perpendicular (900) to the plane of the orientation of the support strip.
  • a shaped charge case, 124 is disposed in a hole in a support strip (128), resting on a projection, 135, on the circumference of the charge case (see Figures 5 and 6 ).
  • the shape charge case ( Figure 6 ) has a projection 135 that is larger diameter than the hole in the support strip so that the bottom of this projection (135) rest on the sided of the hole in the support strip.
  • the charge is connected to a detonating cord (or other detonating means) at 139.
  • the charge case is secured to the support strip (128,129) by any suitable means. In a prototype (and possible production model) there is a thin strip cut into the inside barrel wall that may be bent over to press against the top of the charge case projection and thus provide reversible securement means.
  • the charge case may be secured by small clamps, by adhesive or by welding. Other means will be obvious to those skilled in the metal fabrication art.
  • the support strips (128,129) are inserted into slots cut into the barrel.
  • the support strip will generally be flat metal pieces but may also be curved. Slots in the barrel are angled as desired to allow any configuration of slanted charge paths. If the support strips are metal (preferred) they will be welded into the slots, but they may also be attached by other means such as a strong adhesive, a locking mechanism built into the slots and support strips or any other means that will achieve a secure attachment as will be apparent to those skilled in the art.
  • This arrangement of charge cases securely rested and secured on the support plates, together with the ability to angle the flat plated into the barrel at any desired angle provides the means of relatively simple, precise and reliable angled charge placemat and therefore perforation placement.
  • the barrel is secured in gun body at each end as shown in Figure 1 and 2 (125 and 132) or by other suitable means within the skill of those skilled in the art.
  • Computer aided laser machining greatly facilitated the precision and reliability of the cuts needed in manufacturing the tools of embodiments of this invention, particularly the barrel cut openings (127) and the slots for the charge plate.
  • the desired angles are predetermined to achieve the desired perforation intersection pattern and the barrel cuts designed and machined accordingly.
  • the barrel is disposed in a gun body for use in a well bore.
  • the present invention may be seen in more detail as generally illustrated in FIG. 7 (0700), wherein a perforating gun is deployed inside a wellbore casing along with plural shaped charges (0707, 0704, 0705, 0706).
  • the plural shaped charges in the gun together may herein be referred to as "cluster". Even though four charges have been shown in the Fig. 7 (0700), the cluster may comprise two angled charges according to a preferred exemplary embodiment.
  • Limited entry perforation provides an excellent means of diverting fracturing treatments over several zones of interest at a given injection rate.
  • multiple fractures are not efficient as they create tortuous paths for the fracturing fluid and therefore results in a loss of pressure and energy.
  • a more efficient method and system is isolating 80 zones with more clusters and using 2 or 4 shaped charges per cluster while perforating to intersect at a preferred fracturing plane. Based on the geology of the hydrocarbon, a preferred fracturing plane may be determined. It has been found in field studies that the preferred fracturing plane is perpendicular to the wellbore casing orientation.
  • the preferred perforating plane (0710) is transversely perpendicular to the wellbore orientation (0720).
  • the wellbore orientation (0720) may be at slight angle to the horizontal. The slight angle may be within a range of +- 30 degrees.
  • increasing the number of fracturing zones with an increasing number of clusters while limiting the shaped charges to 2 or 4 per cluster provides for better efficiency in fracturing a preferred fracturing plane.
  • Conventional perforating systems use 12-15 shaped charges per cluster while perforating in a 60/90/120 degrees or a 0/180 degrees phasing. This creates multiple fractures planes that are not efficient for fracturing treatment as the fracturing fluid follows a tortuous path while leaking energy/pressure intended for each fracture. Creating minimum number of multiple fractures near the wellbore is desired so that energy is primarily focused on the preferred fracturing plane than leaking off or losing energy to undesired fractures.
  • orienting limited number of shaped charges per cluster that intersect at a preferred fracturing plane creates longer extension of fractures as a result of minimal tortuosity and minimal multiple fracture initiations.
  • 6 charges may be radially positioned around the gun such that they perforate in the same plane. But, the configuration requires smaller charges and larger diameter guns. Due to the physical limitations of charge effectiveness and perforating gun diameter, it may be desirable to limit the shaped charges to 2 or 4 per cluster.
  • Such a system would enable fracturing fluid to go down the length of the perforation tunnel and intersect at a place where the fracture is created while connecting to the fracture below to create a least tortuous path.
  • 60 to 80 clusters with 2 or 4 charges per cluster may be used in a wellbore completion to achieve maximum efficiency during oil and gas production.
  • a perforating gun string assembly may be deployed and positioned in the isolated stage.
  • the GSA may include a string of perforating guns such as gun (0700) mechanically coupled to each other through tandems or subs or transfers.
  • gun (0700) mechanically coupled to each other through tandems or subs or transfers.
  • the GSA may position on the bottom surface of the casing due to gravity.
  • the GSA may orient itself such that the charges (0707, 0704, 0705, 0706) inside a charge holder tube (CHT) are angularly oriented.
  • the charges may be oriented with a metal strip (0702) as aforementioned.
  • an internal pivot support is shaped as a gimbal to suspend the charges so that they are angularly oriented towards the preferred fracturing plane.
  • the spacing between the spaced charges (0707, 0704, 0705, 0706) may be equal or unequal depending on distance required to achieve the desired orientation.
  • the charges are spaced equally at 3 inches apart. For example, space charge (0703) and space charge (0704) are positioned at a distance (0709) of 3 inches. The spacing between the space charges may range from 1 inch to 20 inches.
  • two space charges (0703, 0705) are angularly oriented downwards ("downward charges”) and two space charges (0704, 0706) are angularly oriented upwards (“upward charges”).
  • the angle of the upward charges may be such that they are oriented to intersect at a preferred fracturing plane (0710) at an upward initiation point (0711).
  • the upward charge (0704) is oriented at an angle (0707) of 13 degrees to the preferred fracturing plane (0710) and the upward charge (0706) is oriented at an angle (0708) of 35 degrees to the preferred fracturing plane (0710).
  • the angle of the upward charge to the preferred fracturing plane (0710) may range from 1 degree to 75 degrees.
  • the angle of the downward charges may be such that they are oriented to intersect at a preferred fracturing plane (0710) at a downward initiation point (0712).
  • the downward charge (0703) is oriented at an angle of 35 degrees to the preferred fracturing plane (0710) and the downward charge (0705) is oriented at an angle of 13 degrees to the preferred fracturing plane (0710).
  • the angle of the downward charge to the preferred fracturing plane (0710) may range from 1 degree to 75 degrees.
  • the upward initiation point and the downward initiation point are equidistant from a longitudinal axis of said perforating gun (0700).
  • the distance from downward initiation point (0712) to an intersecting point (0713) may be equal to the distance from upward initiation point (0711) to the intersecting point (0713).
  • the two upward charges are positioned at two ends of the cluster and the two downward charges are positioned between the upward charges.
  • the charges are arranged such that at least two of the charges with same orientation are in between at least two of the charges with opposite orientation.
  • the upward charges (0804, 0806) are positioned at the two ends of the cluster and the downward charges (0803, 0805) are positioned in between the upward charges.
  • the downward charges (0803, 0805) may be positioned at the two ends of the cluster and the upward charges (0804, 0806) are positioned in between the downward charges.
  • the angle of the upward charges may be such that they are oriented to intersect at a preferred fracturing plane (0810) at an upward initiation point (0811).
  • the angle of the downward charges may be such that they are oriented to intersect at a preferred fracturing plane (0810) at a downward initiation point (0812).
  • the upward charges are oriented at a 52 degree angle to the wellbore orientation (0820). As generally illustrated in FIG. 8 (0800), upward charge (0804) is angled at 52 degrees to the wellbore orientation (0820). Similarly, upward charge (0806) is angled (0807) at 52 degrees to the wellbore orientation (0820).
  • the angle of the upward charge to the wellbore orientation (0810) may range from 1 degree to 75 degrees.
  • the downward charges are oriented at a 13 degree angle (0808) to the wellbore orientation.
  • the angle of the downward charge to the wellbore orientation (0810) may range from 1 degree to 75 degrees.
  • the upward initiation point and the downward initiation point are equidistant from a longitudinal. axis of said perforating gun (0800).
  • the distance from downward initiation point (0812) to an intersecting point (0813) may be equal to the distance from upward initiation point (0811) to the intersecting point (0813).
  • the orientation of the shaped charges are shown for illustration purposes only. One ordinarily skilled in the art would choose an angle such the charges intersect at a preferred fracturing plane.
  • FIG. 9 shows multiple fracture zones (0902) fractured with oriented shaped charges perforated with angularly oriented charges intersecting at a preferred fracturing plane according to an exemplary embodiment.
  • a gun string assembly (GSA) is lowered into a wellbore casing (0901).
  • the perforating gun system as aforementioned perforates a stage with the oriented charges that intersect at preferred fracturing plane (0910).
  • the preferred fracturing plane (0910) is almost transversely perpendicular to the orientation (0920) of the well bore.
  • the preferred fracturing plane (0910) may be at a slight offset angle to the transversely perpendicular orientation.
  • the slight offset angle may be within a range of +- 45 degrees.
  • the fracturing plane (0910) may be at angle of 80 degrees to the well bore orientation.
  • the fracturing plane (0910) may be at angle of 45 degrees to the well bore orientation.
  • the fracturing plane (0910) may be at angle of 90 degrees (transversely perpendicular) to the well bore orientation.
  • the present invention may be seen in more detail as generally illustrated in FIG. 10 (1000), wherein a perforating gun is deployed inside a wellbore casing along with plural shaped charges (1003, 1004).
  • the plural shaped charges in the gun together may herein be referred to as "cluster". Even though two charges have been shown in the Fig. 10 (1000), the cluster may comprise four angled charges according to a preferred exemplary embodiment.
  • the preferred perforating plane (1010) may be transversely perpendicular to the wellbore orientation (1020).
  • the wellbore orientation (1020) may be at slight angle to the horizontal.
  • orienting limited number of shaped charges per cluster that intersect at a preferred fracturing plane creates longer extension of fractures as a result of minimal tortuosity and minimal multiple fracture initiations.
  • the orientation of the shaped charges may be such that when perforating, the upward charge (1003) creates a preferred upward fracture initiation point (1011) in the fracture tunnels and downward charge (1004) creates a preferred downward fracture initiation point (1012) in fracture tunnels.
  • the preferred upward fracture initiation point (1011) and preferred downward fracture initiation point (1012) may lie in same preferred fracture plane.
  • preferred upward fracture initiation point (1002) and preferred downward fracture initiation point (1005) may be created by the charges to create desired fracture initiation length for efficient fracture and minimal tortuosity conditions.
  • the length of the preferred fracture initiation may be customized by orienting the charges at a desired angle. For example, upward charge (1003) could be angled (1007) to initiate a preferred fracture initiation point ( 1011 ) in the preferred fracture plane ( 1010 ).
  • downward charge (1004) could be angled (1008) to initiate a preferred fracture initiation point (1012) in the preferred fracture plane (1010).
  • preferred fracture initiation points may be created at select distances in the preferred fracture plane in order to efficiently fracture the tunnels with minimum tortuosity.
  • the upward charge and the downward charge may be oriented within 1 degree to 75 degrees to the preferred fracturing plane (1010).
  • the distance from the preferred upward fracture initiation point ( 1011 ) to the intersecting longitudinal axis point (1013) may be equal to the distance from the preferred downward fracture initiation point (1012) to the intersecting longitudinal axis point (1013).
  • the upward initiation point and the downward initiation point are equidistant from a longitudinal axis of the perforating gun.
  • the upward initiation point and the downward initiation point are equidistant from a centerline of the well bore casing. In some instances the centerline of the well bore casing and the longitudinal axis of the perforating gun may the same. In other instances, the centerline of the well bore casing may be higher than the longitudinal axis of the perforating gun.
  • a preferred exemplary phasing wellbore perforation method with angularly oriented shaped charges may be generally described in terms of the following steps:
  • the present invention system anticipates a wide variety of variations in the basic theme of phasing perforating gun orienting system in a wellbore casing comprising a plurality of upwardly oriented shaped charges (upward charges) and a plurality of downwardly oriented shaped charges (downward charges) wherein:
  • the present invention method anticipates a wide variety of variations in the basic theme of implementation, but can be generalized as a limited entry phasing perforating gun method wherein the method is performed on a phasing perforating gun system comprising a plurality of upwardly oriented shaped charges (upward charges) and a plurality of downwardly oriented shaped charges (downward charges) wherein:
  • the present invention anticipates a wide variety of variations in the basic theme of oil and gas extraction.
  • the examples presented previously do not represent the entire scope of possible usages. They are meant to cite a few of the almost limitless possibilities.
  • This basic system and method may be augmented with a variety of ancillary embodiments, including but not limited to:
  • a limited entry perforating phasing gun system and method for accurate perforation in a deviated/horizontal wellbore has been disclosed.
  • the system/method includes a gun string assembly (GSA) deployed in a wellbore with shaped charge clusters.
  • GSA gun string assembly
  • the charges are spaced and angled such that, when perforated, they intersect at a preferred fracturing plane.
  • the fractures initiate at least principal stress location in a preferred fracturing plane perpendicular to the wellbore from an upward and downward location of the wellbore. Thereafter, the fractures connect radially about the wellbore in the preferred fracturing plane.
  • the fracture treatment in the preferred fracturing plane creates minimal tortuosity paths for longer extension of fractures that enables efficient oil and gas flow rates during production.

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  • Geology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
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  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
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  • Geochemistry & Mineralogy (AREA)
  • Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
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Claims (6)

  1. Phasengesteuertes Perforationspistolenausrichtungssystem in einer horizontalen Bohrlochauskleidung (701, 801, 901), mehrere nach oben ausgerichtet geformte Ladungen (704, 706, 804, 806) und mehrere nach unten ausgerichtet geformte Ladungen (703, 705, 803, 805) umfassend; wobei jede der nach oben ausgerichtet geformten Ladungen und der nach unten ausgerichtet geformten Ladungen entlang einer horizontalen Achse (720, 820, 920) beabstandet sind und jede der nach oben ausgerichtet geformten Ladungen und der nach unten ausgerichtet geformten Ladungen dazu ausgelegt ist, eine unterschiedliche Ebene entlang der horizontalen Achse einzunehmen; wobei: die nach oben ausgerichtet geformten Ladungen derart in eine nach oben angewinkelte Richtung ausgerichtet sind, dass die nach oben ausgerichtet geformten Ladungen beim Perforieren einen aufsteigenden Brucheinleitungspunkt (711, 811) in einer Kohlenwasserstoffformation über der horizontalen Achse entlang der Bohrlochauskleidung erzeugen;
    die nach unten ausgerichtet geformten Ladungen derart in eine nach unten angewinkelte Richtung ausgerichtet sind, dass die nach unten ausgerichtet geformten Ladungen beim Perforieren einen absteigenden Brucheinleitungspunkt (712, 812) in einer Kohlenwasserstoffformation unter der horizontalen Achse entlang der Bohrlochauskleidung erzeugen; und
    der aufsteigende Brucheinleitungspunkt, der absteigende Brucheinleitungspunkt und ein Punkt entlang der horizontalen Achse entlang der Bohrlochauskleidung in einer Bruchebene (710, 810, 910) liegen; wobei die Bruchebene quer senkrecht zur horizontalen Achse verläuft.
  2. Phasengesteuertes Perforationspistolenausrichtungssystem nach Anspruch 1, wobei ein Winkel (707, 708, 807) zwischen mindestens einer nach oben ausgerichtet geformten Ladung der nach oben ausgerichtet geformten Ladungen und der Bruchebene zwischen 1 Grad und 75 Grad liegt.
  3. Phasengesteuertes Perforationspistolenausrichtungssystem nach Anspruch 1, wobei ein Winkel (808) zwischen mindestens einer nach unten ausgerichteten Ladung der nach unten ausgerichteten Ladungen und der Bruchebene zwischen 1 Grad und 75 Grad liegt.
  4. Phasengesteuertes Perforationspistolenausrichtungssystem nach Anspruch 1, wobei der aufsteigende Brucheinleitungspunkt und der absteigende Brucheinleitungspunkt von der Längsachse der Perforationspistole gleich beabstandet sind.
  5. Phasengesteuertes Perforationspistolenausrichtungssystem nach Anspruch 1, wobei der aufsteigende Brucheinleitungspunkt und der absteigende Brucheinleitungspunkt von der Mittellinie der Bohrlochauskleidung gleich beabstandet sind.
  6. Phasengesteuertes Perforationspistolenausrichtungssystem nach Anspruch 1, wobei die phasengesteuerte Perforationspistole zwei nach oben ausgerichtete Ladungen und zwei nach unten ausgerichtete Ladungen umfasst.
EP16737957.7A 2015-01-16 2016-01-15 System und verfahren für phasengesteuerte perforationspistole mit begrenzter eingabe Active EP3245381B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US14/598,868 US9562421B2 (en) 2014-02-08 2015-01-16 Limited entry phased perforating gun system and method
PCT/US2016/013579 WO2016115452A1 (en) 2015-01-16 2016-01-15 Limited entry phased perforating gun system and method

Publications (3)

Publication Number Publication Date
EP3245381A1 EP3245381A1 (de) 2017-11-22
EP3245381A4 EP3245381A4 (de) 2018-06-06
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EP3867492B1 (de) * 2018-10-18 2024-05-15 GeoDynamics, Inc. Pulsbasiertes perf und waschsystem und verfahren
CN110374543B (zh) * 2019-06-07 2021-09-14 太原理工大学 煤矿井下复合射孔造缝强力封孔装置及方法
CN110714746B (zh) * 2019-11-28 2021-08-17 中国华能集团清洁能源技术研究院有限公司 一种地热系统的锯齿状压裂装置及方法

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MX363526B (es) 2019-03-27
CN107250483A (zh) 2017-10-13
CA2974013C (en) 2018-04-03
EP3245381A4 (de) 2018-06-06
WO2016115452A1 (en) 2016-07-21
CN107250483B (zh) 2019-04-23
MX2017009256A (es) 2017-12-04
EP3245381A1 (de) 2017-11-22
CA2974013A1 (en) 2016-07-21

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