EP3106605A1 - Beseitigungsverfahren und beseitigtes vervollständigungssystem - Google Patents

Beseitigungsverfahren und beseitigtes vervollständigungssystem Download PDF

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Publication number
EP3106605A1
EP3106605A1 EP15172292.3A EP15172292A EP3106605A1 EP 3106605 A1 EP3106605 A1 EP 3106605A1 EP 15172292 A EP15172292 A EP 15172292A EP 3106605 A1 EP3106605 A1 EP 3106605A1
Authority
EP
European Patent Office
Prior art keywords
production casing
annular barrier
inflow section
existing
existing production
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP15172292.3A
Other languages
English (en)
French (fr)
Inventor
Paul Hazel
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Welltec AS
Original Assignee
Welltec AS
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Welltec AS filed Critical Welltec AS
Priority to EP15172292.3A priority Critical patent/EP3106605A1/de
Priority to EP16728984.2A priority patent/EP3310991A1/de
Priority to PCT/EP2016/063704 priority patent/WO2016202834A1/en
Priority to US15/182,950 priority patent/US20160369603A1/en
Publication of EP3106605A1 publication Critical patent/EP3106605A1/de
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • E21B43/02—Subsoil filtering
    • E21B43/10—Setting of casings, screens, liners or the like in wells
    • 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
    • E21B29/00—Cutting or destroying pipes, packers, plugs or wire lines, located in boreholes or wells, e.g. cutting of damaged pipes, of windows; Deforming of pipes in boreholes or wells; Reconditioning of well casings while in the ground
    • E21B29/10—Reconditioning of well casings, e.g. straightening
    • 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
    • E21B33/00—Sealing or packing boreholes or wells
    • E21B33/10—Sealing or packing boreholes or wells in the borehole
    • E21B33/12—Packers; Plugs
    • E21B33/124—Units with longitudinally-spaced plugs for isolating the intermediate space
    • 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
    • E21B43/14—Obtaining from a multiple-zone well

Definitions

  • the present invention relates to a redressing method for arranging an inner production casing within an existing production casing in order to re-establish production of hydrocarbon-containing fluid in a malfunctioning well. Furthermore, the present invention relates to a redressed completion system for reestablishing production of hydrocarbon-containing fluid in a malfunctioning well.
  • a redressing method for arranging an inner production casing within an existing production casing in order to re-establish production of hydrocarbon-containing fluid in a malfunctioning well having a top part, the existing production casing having a first inner diameter and being arranged in a borehole, the redressing method comprising the steps of:
  • the redressing method as described above may comprise the step of reducing a hydrostatic pressure of the well by the step of redressing the existing production casing by means of the inner production casing.
  • the redressing method as described above may comprise the steps of determining a second inflow section of the existing production casing opposite a second production zone, wherein the step of providing an inner production casing may further comprise providing a third annular barrier, and arranging the second annular barrier on one side of the second inflow section and the third annular barrier on the other side of the second inflow section of the existing production casing.
  • the redressing method as described above may comprise the steps of determining a third inflow section of the existing production casing opposite a third production zone, wherein the step of providing an inner production casing may further comprise providing a fourth annular barrier, and arranging the third annular barrier on one side of the third inflow section and the fourth annular barrier on the other side of the third inflow section of the existing production casing.
  • the inner production casing may extend to the top of the well.
  • the inner production casing may overlap most of the existing production casing.
  • the step of anchoring the inner production casing at the top part of the well may comprise the step of providing the inner production casing with an anchoring annular barrier.
  • the redressing method according to the present invention may comprise the step of arranging a screen opposite the first inflow section of the inner production casing.
  • the expandable metal sleeves may be expanded by introducing pressurised fluid into the annular space via the inner production casing.
  • the redressing method as described above may comprise a step of closing the inner production casing before the step of expanding the expandable metal sleeves of the annular barriers.
  • the step of determining may be performed by means of a detecting unit in a downhole tool or in the inner production casing.
  • the step of determining may be performed by consulting a completion diagram of the existing production casing.
  • the present invention also relates to a redressed completion system for reestablishing production of hydrocarbon-containing fluid in a malfunctioning well having a top part, comprising:
  • the inner production casing may have an unexpanded outer diameter which is smaller than a first inner diameter of the existing production casing, reducing the hydrostatic pressure of the well.
  • the inner production casing may be anchored to the top part of the well.
  • the inner production casing may extend to a top of the well.
  • the inner production casing may have an inner diameter which is substantially equal along the entire extension of the inner production casing.
  • the existing production casing may have a second inflow section opposite a second production zone
  • the inner production casing comprises a third annular barrier and a second inner inflow section arranged between the second annular barrier and the third annular barrier, the second annular barrier being expanded on one side of the second inflow section and the third annular barrier being expanded on the other side of the second inflow section of the existing production casing, isolating the second inflow section.
  • the existing production casing may have a third inflow section opposite a third production zone
  • the inner production casing may comprise a fourth annular barrier and a third inner inflow section arranged between the third annular barrier and the fourth annular barrier, the third annular barrier being expanded on one side of the third inflow section, and the fourth annular barrier being expanded on the other side of the third inflow section of the existing production casing, isolating the third inflow section.
  • the redressed completion system as described above may further comprise a detection tool configured to determine the inflow sections of the existing production casing.
  • a screen may be is arranged opposite the inflow sections of the existing production casing and/or the inner inflow sections of the inner production casing.
  • the inner production casing may have an inner diameter which is substantially equal along the entire extension of the inner production casing.
  • the screen may be fluidly connected to the inflow sections.
  • the inflow section may comprise an inflow control device.
  • a pump may be arranged at the top of the well.
  • system may comprise an expansion tool.
  • tubular metal part may comprise an expansion opening.
  • the annular space may comprise at least one thermally decomposable compound adapted to generate gas or super-critical fluid upon decomposition.
  • This compound may be thermally decomposable below a temperature of 400°C.
  • Said compound may comprise nitrogen, or comprise nitrogen in the form of ammonium, nitrite, azide or nitrate.
  • the compound may be selected from a group consisting of: ammonium dichromate, ammonium nitrate, ammonium nitrite, barium azide, sodium nitrate, or a combination thereof.
  • the compound may decompose at temperatures above 100°C, preferably above 180°C.
  • the inner production casing may comprise an anchoring annular barrier.
  • the inner production casing may comprise closing means for closing the inner production casing before expansion.
  • the existing production casing may comprise annular barriers for isolating a production zone.
  • Fig. 1 shows a redressed completion system 100 for re-establishing production of hydrocarbon-containing fluid in a malfunctioning well 2.
  • the redressed completion system comprises an existing production casing 4 arranged in a borehole in the well.
  • the existing production casing has a first inflow section 5, 5a opposite a first production zone 101 of a reservoir or formation 14.
  • the redressed completion system 100 further comprises an inner production casing 6 having a first annular barrier 1, 1a and a second annular barrier 1, 1b having a distance between them.
  • Each annular barrier comprises a tubular metal part 7 for mounting as part of the inner production casing 6, an expandable metal sleeve 8 surrounding the tubular metal part and having an inner face 9 facing the tubular metal part and an outer face 10 facing an inner wall 11 of the existing production casing.
  • Each end of the expandable metal sleeve 12 is connected with the tubular metal part defining an annular space 15 between the inner face of the expandable metal sleeve and the tubular metal part.
  • the inner production casing further comprises a first inner inflow section 16 arranged between the first and second annular barriers, the inner production casing extending inside the existing production casing.
  • the first annular barrier 1a is expanded on one side of the first inflow section and the second annular barrier 1b is expanded on the other side of the first inflow section of the existing production casing, isolating the first inflow section and thereby leading the hydrocarbon-containing fluid from the first production zone 101 into the inner production casing through the inflow sections 5, 16.
  • the inner production casing 6 has an unexpanded outer diameter D uo (shown in Fig. 3 ) which is smaller than a first inner diameter D 1 (shown in Fig.
  • the lifetime of the well is prolonged by redressing the redressed completion system 100 in an easy manner by encapsulating the inflow section of the existing production casing 4, so that the production fluid is led from the production zone 101 into the existing production casing 4 and further into the inner production casing 6 through the inflow sections 5, 16.
  • the completion system 100 is redressed by first determining the first inflow section of the existing production casing 4 opposite the first production zone 101, e.g. by a submerging a detection tool 50 into the existing production casing 4, as shown in Fig. 2 .
  • the inner production casing 6 having an inner diameter D i (shown in Fig. 3 ) which is substantially the same along the whole extension of the inner production casing, is then provided, so that the hydrocarbon-containing fluid is able to flow in an uninterrupted manner along the inner production casing 6.
  • the existing production casing 4 is redressed by introducing the inner production casing 6 into the existing production casing, as shown in Fig.
  • the first annular barrier 1, 1a is arranged on one side of the first inflow section and the second annular barrier on the other side of the inflow section, and the first inflow section of the existing production casing is encapsulated by expanding the expandable metal sleeves of the first and second annular barriers, isolating the first inflow section, as shown in Fig. 4 .
  • the annular barriers 1 may be expanded by pressurised fluid within the inner production casing 6 entering an expansion opening 22. Subsequently, the inner production casing is anchored in the top part 3 of the well 2, e.g.
  • the well may be self-producing when the completion is redressed or the inflow section of the inner production casing 6 may be activated, e.g. by opening a sliding sleeve so that the sliding sleeve 24 (shown in Fig. 10 ) does no longer block the inflow of fluid into the inner production casing 6.
  • the annular barriers 1 may be expanded by pressurised fluid inside the inner production casing 6.
  • the inner production casing 6 may be pressurised by an expansion tool 53 (shown in Fig. 9 ) isolating a zone opposite the expansion opening 22, or the inner production casing 6 may be pressurised from the top by a pump 52, as shown in fig. 1 .
  • the inner production casing 6 is closed by a closing means 23, e.g. by dropping a closing means 23 in the form of a ball down the inner production casing 6 to close the end of the inner production casing 6, as shown in Figs. 1 and 4 , and then the whole inner production casing 6 is pressurised, expanding all annular barriers 1 substantially simultaneously.
  • the existing production casing 4 may have annular barriers 1 for isolating the first production zone 101 as shown in Figs. 1-5 .
  • the existing production casing 4 may also be a cemented casing where cement 55 is pumped into the annulus surrounding the existing production casing 4, and the production is thus established by perforating the existing production casing 4, the cement and the formation creating perforations 56.
  • the inner production casing 6 extending all the way up to the top of the well is not suspended/hung off inside the existing production casing 4 but anchored in the well head, the "christmas tree" or the blowout preventer.
  • the inner production casing 6 further comprises providing a third annular barrier 1c and the second annular barrier 1b on one side of the second inflow section 16b and the third annular barrier 1c on the other side of the second inflow section of the existing production casing, as shown in Fig. 7 .
  • the redressed completion system 100 of Fig. 7 comprises an existing production casing 4 having several inflow sections and similarly the inner production casing 6 has at least the same number plus at least one of annular barriers 1 as the number of inflow sections of the existing production casing 4.
  • the annular barriers 1 are arranged so that two-by-two they encapsulate one of the production zones 101, 102, 103, 104.
  • the fourth production zone 104 is arranged closer to the top of the well than the third production zone and the second production zone 102.
  • the existing production casing 4 is shorter in length than the inner production casing 6, and the inner production casing overlaps most of the existing production casing.
  • the inner production casing 6 thus extends further up the well towards the top of the well than the existing production casing 4, and the anchoring of the inner production casing 6 is performed in an upper casing 25 of the existing production casing 4.
  • the redressing of the redressed completion system 100 thus eliminates the gap 26 between the upper casing 25 and the lower existing production casing 4, and there is therefore no longer a risk of any intervention tools getting stuck in the gap 26.
  • the existing production casing 4 comprises a worn out screen 20a where the openings 33 in the screen have become too large due to the sand abrading the material surrounding the openings 33 and the openings 34 in the casing 4, as shown in Fig. 9 . Therefore, a screen 20 of the inner production casing 6 is arranged opposite the first inflow section 5a of the existing production casing. The screen 20 is fluidly connected to the inflow sections 5, 16. Thus, the completion is redressed by a not worn sleeve and the production can continue. As shown in fig. 9 , the first and second annular barriers 1a, 1b are arranged offset in relation to the annular barriers 1 of the existing production casing 4; however still encapsulating the inflow section 5 of the existing production casing 4.
  • the second inflow section 5b of Fig. 8 is closed, so in Fig. 8 the inner production casing 6 does not overlap the whole existing production casing 4 covering also the second inflow section 5b.
  • the redressed completion system 100 is redressed to decrease the hydrostatic pressure, and then no screens are used and the inner production casing 6 has annular barriers 1 encapsulating merely the production zone arranged closest the top of the well, and the inner production casing 6 does not overlap the remaining production zones closer to the bottom 57 (shown in Fig. 8 ) of the well.
  • the inner production casing 6 may, in some embodiments, be longer than the existing production casing 4, and in other embodiments, shorter the existing production casing 4.
  • the inflow section 5, 16 may comprises an inflow control device 38 as shown in Fig. 1 .
  • the annular barrier 1 may not have an expansion opening and the annular space comprises at least one thermally decomposable compound adapted to generate gas or super-critical fluid upon decomposition.
  • This compound may be thermally decomposable below a temperature of 400°C and may comprise nitrogen, or comprise nitrogen in the form of ammonium, nitrite, azide or nitrate.
  • the compound may be selected from a group consisting of: ammonium dichromate, ammonium nitrate, ammonium nitrite, barium azide, sodium nitrate, or a combination thereof.
  • the compound may decompose at temperatures above 100°C, preferably above 180°C.
  • hydrocarbon-containing fluid or well fluid any kind of fluid that may be present in oil or gas wells downhole, such as natural gas, oil, oil mud, crude oil, water, etc.
  • gas is meant any kind of gas composition present in a well, completion, or open hole
  • oil is meant any kind of oil composition, such as crude oil, an oil-containing fluid, etc.
  • Gas, oil, and water fluids may thus all comprise other elements or substances than gas, oil, and/or water, respectively.
  • a casing or production casing is meant any kind of pipe, tubing, tubular, liner, string etc. used downhole in relation to oil or natural gas production.
  • a downhole tractor can be used to push the tool all the way into position in the well.
  • the downhole tractor may have projectable arms having wheels, wherein the wheels contact the inner surface of the casing for propelling the tractor and the tool forward in the casing.
  • a downhole tractor is any kind of driving tool capable of pushing or pulling tools in a well downhole, such as a Well Tractor®.

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
EP15172292.3A 2015-06-16 2015-06-16 Beseitigungsverfahren und beseitigtes vervollständigungssystem Withdrawn EP3106605A1 (de)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP15172292.3A EP3106605A1 (de) 2015-06-16 2015-06-16 Beseitigungsverfahren und beseitigtes vervollständigungssystem
EP16728984.2A EP3310991A1 (de) 2015-06-16 2016-06-15 Beseitigungsverfahren und beseitigtes vervollständigungssystem
PCT/EP2016/063704 WO2016202834A1 (en) 2015-06-16 2016-06-15 Redressing method and redressed completion system
US15/182,950 US20160369603A1 (en) 2015-06-16 2016-06-15 Redressing method and redressed completion system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP15172292.3A EP3106605A1 (de) 2015-06-16 2015-06-16 Beseitigungsverfahren und beseitigtes vervollständigungssystem

Publications (1)

Publication Number Publication Date
EP3106605A1 true EP3106605A1 (de) 2016-12-21

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EP15172292.3A Withdrawn EP3106605A1 (de) 2015-06-16 2015-06-16 Beseitigungsverfahren und beseitigtes vervollständigungssystem

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040149435A1 (en) * 2003-02-05 2004-08-05 Henderson William D. Well screen assembly and system with controllable variable flow area and method of using same for oil well fluid production
US20040163811A1 (en) * 2003-02-19 2004-08-26 Mckee L. Michael Fracturing tool having tubing isolation system and method
US20080115934A1 (en) * 2006-11-20 2008-05-22 Pettinato Miguel H Multi-Zone Formation Evaluation Systems and Methods
US20140318770A1 (en) * 2011-11-30 2014-10-30 Welltec A/S Pressure integrity testing system

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040149435A1 (en) * 2003-02-05 2004-08-05 Henderson William D. Well screen assembly and system with controllable variable flow area and method of using same for oil well fluid production
US20040163811A1 (en) * 2003-02-19 2004-08-26 Mckee L. Michael Fracturing tool having tubing isolation system and method
US20080115934A1 (en) * 2006-11-20 2008-05-22 Pettinato Miguel H Multi-Zone Formation Evaluation Systems and Methods
US20140318770A1 (en) * 2011-11-30 2014-10-30 Welltec A/S Pressure integrity testing system

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