EP3408495B1 - Procédé permettant de contrecarrer un affaissement de terrain au voisinage d'un réservoir souterrain - Google Patents

Procédé permettant de contrecarrer un affaissement de terrain au voisinage d'un réservoir souterrain Download PDF

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Publication number
EP3408495B1
EP3408495B1 EP17718136.9A EP17718136A EP3408495B1 EP 3408495 B1 EP3408495 B1 EP 3408495B1 EP 17718136 A EP17718136 A EP 17718136A EP 3408495 B1 EP3408495 B1 EP 3408495B1
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EP
European Patent Office
Prior art keywords
casing
production
reinforcing
reinforcing material
reservoir
Prior art date
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Active
Application number
EP17718136.9A
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German (de)
English (en)
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EP3408495A1 (fr
Inventor
Bert Fennechienes ALBERTS
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Karizan BV
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Karizan BV
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Priority to PL17718136T priority Critical patent/PL3408495T3/pl
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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
    • E21B33/00—Sealing or packing boreholes or wells
    • E21B33/10—Sealing or packing boreholes or wells in the borehole
    • E21B33/13—Methods or devices for cementing, for plugging holes, crevices or the like
    • E21B33/138—Plastering the borehole wall; Injecting into the formation
    • 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
    • E21B43/025—Consolidation of loose sand or the like round the wells without excessively decreasing the permeability thereof

Definitions

  • the present invention generally relates to a method for counteracting land subsidence in the vicinity of an underground reservoir accessible through a number of wellbores.
  • Land subsidence is a known negative side effect of production of natural resources, for example hydrocarbons, from an underground reservoir through a well. Extraction of hydrocarbons causes compaction of the reservoir rock leading to subsidence at ground level. Land subsidence causes environmental damage and effects water management. When earth layers are compacted near a natural fault, tension may build up and the earth layers will start shifting in a disruptive manner causing earthquakes. In recent years production of gas from the Groningen gas field in the north-eastern part of The Netherlands has led to numerous claims for damages to buildings resulting from earthquakes caused by the gas production. Many buildings in the area show visible damage, such as cracks in the walls. An example of a subsidence remedy in an in-situ coal gasification has been disclosed in US 4,437,520 A1 . Another example of a subsidence prevention due to cavities in an unconsolidated formation has been mentioned in US 3,718,189 A1 .
  • the present invention has for its object to provide a method to prevent or minimize land subsidence due to activities, such as production of (natural) resources, involving transport of materials to and/or from an underground reservoir through a well having a well bore running in the direction of the reservoir.
  • this object is achieved by the method steps of bringing reinforcing material into a casing present in the wellbore and making the reinforcing material flow out through perforations in the casing for forming a number of reinforcing objects of reinforcing material around the wellbore, whereby the method comprises the step of forming cracks in the reservoir surrounding the wellbore and filling the cracks with the reinforcing material for forming the reinforcing objects.
  • the reinforcing objects reinforce the reservoir soil surrounding the well bore and adequately prevent land subsidence. Furthermore, the reinforcing material replaces the fluids extracted from the reservoir to prevent the compaction of the reservoir rock.
  • the present invention is specifically suitable for use in a reservoir of non-permeable soil, such as shale or rock.
  • the reinforcing objects have a dome or arch shaped cross-section.
  • the dome or arch shape enables the reinforcing objects to withstand high loads from surrounding layers, for instance salt layers, and consequently attribute to prevent land subsidence.
  • a suitable type of reinforcing material comprises grout.
  • the reinforcing objects are formed around a substantially horizontal part of the wellbore to maximally support the well bore and to create an enhanced supporting surface in the surrounding soil.
  • the perforations are present in circumferential patterns in the casing.
  • Suitable equipment for use in the method includes a pump being used to bring the reinforcing material into the casing.
  • tubing provided with a nozzle head is used to make the reinforcing material flow out through the perforations in the casing.
  • the casing is dividable in sections by seals or packers.
  • the cracks are formed using the reinforcing material.
  • the two separate steps of forming the cracks and forming the reinforcing objects are then effectively combined.
  • the cracks are formed using fracking liquids.
  • the reservoir is hardened, for example by Nitrogen injection, prior to forming the cracks.
  • the wellbore remains intact for production of the resources.
  • a pattern of reinforcing objects is defined around the adjacent wellbores creating a foundation platter.
  • a foundation platter can support a plurality of buildings, such as a village, while leaving enough space for flow movements in the reservoir.
  • Figure 1 shows a schematic overview of a production site for natural resources, such as hydrocarbons, in which several well bores B run from production wells P in the direction of a reservoir R. Parts D of the reservoir R are reinforced using the method according to the invention. A resulting foundation platter is created defining a pattern of reinforcing objects D around adjacent wellbores B. The dashed lines S indicate free space between the reinforcing objects D that leaves room flow movements of the hydrocarbons in the reservoir.
  • Figure 2 schematically shows a cross section through a well bore B1 of an underground reservoir R1 that has permeable soil to illustrate a first embodiment of the method according to the invention.
  • Figures 3A through 3C schematically show a cross section through a well bore B2 of an underground R2 that has non-permeable soil to illustrate a second embodiment of the method according to the invention in different time periods.
  • a section is cut out and shown in more detail.
  • the well bore B1, B2 comprises a casing 10 that is inserted into a recently drilled section of the wellbore.
  • the casing 10 is typically held into place with cementation 12.
  • Casing 10 normally has a tubular shape receiving an internal elongate hollow tubing 11 that in the position of use runs in the direction of the reservoir.
  • An annulus A surrounds the tubing 11 and is itself surrounded by the well wall formed by the casing 10 and the cementation 12.
  • WROP Wireline Retrievable Oil Production
  • a nipple 20 is shown.
  • the WROP system has been described in the international patent application WO2014/011043 of the same applicant.
  • WROP Wireline Retrievable Oil Production
  • Seals or packers 21 are present to close of sections of the casing 10.
  • Perforations 14 connect the interior of the casing 10 with the surroundings of the casing 10, i.e. the reservoir soil. Consequently, the perforations 14 also extend through the cementation 12.
  • the perforations 14 are production perforations for production of resources, such as hydrocarbons.
  • additional perforations are made in the casing.
  • the additional perforations are alternate to the production perforations.
  • the preferred pattern for the perforations is a circumferential pattern.
  • the method according to the invention for counteracting land subsidence due to activities involving material transport, such as production of resources, through wellbores comprises the step of bringing reinforcing material into the casing 10 present in the wellbore B1 or B2.
  • a pump may be used to bring the reinforcing material into the casing 10.
  • the reinforcing material is made to flow out through the perforations 14 in the casing 10 to form a number of reinforcing objects D1 respectively D2 around the wellbore B1 respectively B2.
  • Dedicated equipment provided with a nozzle head may be used.
  • Suitable reinforcing materials are injectable materials that will attach to the reservoir area and the outer well wall and will harden as a result of a reaction, for example a chemical reaction or a thermal reaction.
  • the reinforcing material may comprise grout, resin, such as epoxy resin, polyurethane resin or polyester resin, glass fibre, silicon rubber, starch or any combination thereof.
  • the reinforcing objects D are formed around a substantially horizontal part of the wellbore B.
  • a sliding sleeve valve 30 is used to control fluid flow between the tubing 11 and the annulus A.
  • Suitable sliding sleeve valves are known in the field of gas and oil exploration and production.
  • the wellbore When applying the method according to the invention the wellbore remains intact for production of the resources.
  • the resources flow out of the reservoir into the casing 10 in a direction of flow F that is substantially transverse to the casing 10.
  • the reinforcing objects D1 and D2 have a dome or arch shaped cross-section.
  • the reinforcing objects D1 and D2 have a general ring shape or donut shape.
  • the first embodiment of the method according to the invention comprises the steps described above and is suitable for a reservoir R1 of permeable soil, as illustrated in figure 2 .
  • the second embodiment comprises additional steps prior to the steps described above and is suitable for a reservoir R2 of non-permeable soil, such as shale or rock, illustrated in figures 3A - 3C .
  • the method comprises the steps of forming cracks in the reservoir R2 surrounding the wellbore B2 and filling the cracks for forming the reinforcing objects.
  • the cracks can either be formed using the reinforcing material itself or using fracking liquids. Suitable fracking liquids comprise water and proppants, such as sand or plastic.
  • the reservoir R2 may be hardened, for example by Nitrogen injection.
  • the fracked reservoir areas FR2 are preferably alternately used for production of resources.
  • FIG 3A as an example four fracked reservoir areas FR2 are shown in a first time period of which the second and the fourth FR2 (seen from left to right) are production areas and provided with arrows F.
  • the first and the third FR2 passageways from the perforations 14 to the tubing 11 are closed by dedicated equipment.
  • An example of suitable equipment are sleeve valves or side doors 30 that are slideable over the outer surface of the tubing 11, preferably under wireline control.
  • areas C are drawn to indicate closed passageways.
  • the areas C are imaginary areas and have no physical embodiment.
  • Figure 3B shows the view of figure 3A in a second time period that is later than the first time period.
  • the second and the fourth FR2 are no longer used as production areas, but have been transformed into reinforcing objects D2 using the method according to the invention.
  • the passageways to perforations 14 are closed by dedicated equipment, for example the sleeve valves 30. Now the first and the third FR2 have become production areas.
  • Figure 3C shows the view of figure 3B in a third time period that is later than the second time period.
  • the first and the third FR2 are also no longer used as production areas, but have also been transformed into reinforcing objects D2 using the method according to the invention.
  • the passageways to perforations 14 are closed by dedicated equipment, for example the sliding sleeve valves 30. Water can be injected into the thus treated well bore to use the well bore as heat exchanger for geothermal application.
  • a WROP - HEX is a Heat Exchanger Plug-in device 40 as described in WO2014/011043 is used.
  • the invention is based on the general inventive thought to actively reinforce a well bore running towards an underground reservoir using reinforcing material and transporting it through the well bore to form reinforcing objects around the well bore.
  • the reinforcing objects are formed by a combination of cavities and/or cracks filled with reinforcing material and/or reservoir formation, such as shale or rock. Consequently the reinforcing objects will have an arbitrary shape generally similar to a ring or a donut shape and generally having a dome shaped or arch shaped cross-section.
  • the invention has been illustrated in the context of reinforcing well bores on a hydrocarbon production site, the invention is not limited to well bores for transport of hydrocarbons or other materials out of an underground reservoir.
  • the method according to the invention can also be used to reinforce well bores used for transport of materials into an underground reservoir, for instance for the purpose of underground storage. Some examples of underground storage include disposal of nuclear waste or filling salt cavities with fluids.
  • the method according to the invention can then also be used to reinforce well bores used for (continuous) transport of materials into and out of an underground reservoir, for instance for geothermal applications.

Landscapes

  • 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)
  • Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)

Claims (15)

  1. Procédé pour contrecarrer un affaissement de terrain dû à des activités, telles que la production de ressources, lesdites activités impliquant le transport de matériaux à destination et/ou en provenance d'un réservoir souterrain (R ; R1 ; R2) à travers un puits (P) ayant un puits de forage (B ; B1 ; B2) s'étendant en direction du réservoir, le procédé comprenant les étapes consistant à amener du matériau de renforcement dans une enveloppe (10) présente dans le puits de forage et faire sortir le matériau de renforcement par des perforations (14) dans l'enveloppe pour former autour du puits de forage un certain nombre d'éléments de renforcement (D ; D1 ; D2) d'un matériau de renforcement, caractérisé en ce que le procédé comprend l'étape consistant à former des fissures dans le réservoir (R2) entourant le puits de forage (B2) et à remplir les fissures avec le matériau de renforcement pour former les éléments de renforcement (D2).
  2. Procédé selon la revendication 1, dans lequel les éléments de renforcement (D ; D1 ; D2) ont une section transversale en forme de dôme ou d'arc.
  3. Procédé selon la revendication 1 ou 2, dans lequel le matériau de renforcement comprend du mortier liquide.
  4. Procédé selon l'une ou plusieurs des revendications précédentes, dans lequel les éléments de renforcement (D ; D1 ; D2) sont formés autour d'une partie sensiblement horizontale du puits de forage (B ; B1 ; B2).
  5. Procédé selon l'une ou plusieurs des revendications précédentes, dans lequel les perforations (14) sont présentes dans l'enveloppe (10) selon des motifs circonférentiels.
  6. Procédé selon la revendication 5, dans lequel on utilise des perforations de production présentes dans l'enveloppe (10) pour la production de ressources, telles que la production d'hydrocarbures.
  7. Procédé selon la revendication 6, dans lequel des perforations supplémentaires sont réalisées en plus des perforations de production présentes dans l'enveloppe (10) pour la production de ressources, telles que la production d'hydrocarbures.
  8. Procédé selon l'une ou plusieurs des revendications précédentes, dans lequel on utilise une pompe pour amener le matériau de renforcement dans l'enveloppe (10).
  9. Procédé selon l'une ou plusieurs des revendications précédentes, dans lequel on utilise un tube (11) muni d'une tête de buse pour faire sortir le matériau de renforcement à travers les perforations (14) de l'enveloppe (10).
  10. Procédé selon la revendication 9, dans lequel l'enveloppe (10) peut être divisée en sections par des joints (21).
  11. Procédé selon l'une ou plusieurs des revendications précédentes, dans lequel les fissures sont formées en utilisant le matériau de renforcement.
  12. Procédé selon l'une ou plusieurs des revendications précédentes, dans lequel les fissures sont formées en utilisant un liquide de fracturation.
  13. Procédé selon l'une ou plusieurs des revendications précédentes, dans lequel le réservoir est durci, de préférence par injection d'azote, avant de former les fissures.
  14. Procédé selon l'une ou plusieurs des revendications précédentes, dans lequel le puits de forage (B ; B1 ; B2) reste intact pour la production des ressources.
  15. Procédé selon l'une ou plusieurs des revendications précédentes, dans lequel un motif d'éléments de renforcement (D ; D1 ; D2) est défini autour de puits de forage adjacents (B ; B1 ; B2) créant un plateau de fondation.
EP17718136.9A 2016-01-29 2017-01-27 Procédé permettant de contrecarrer un affaissement de terrain au voisinage d'un réservoir souterrain Active EP3408495B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL17718136T PL3408495T3 (pl) 2016-01-29 2017-01-27 Sposób przeciwdziałania osiadaniu gruntu w pobliżu podziemnego zbiornika

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL2016185A NL2016185B1 (en) 2016-01-29 2016-01-29 Method for counteracting land subsidence in the vicinity of an underground reservoir.
PCT/NL2017/050054 WO2017131520A1 (fr) 2016-01-29 2017-01-27 Procédé permettant de contrecarrer un affaissement de terrain au voisinage d'un réservoir souterrain

Publications (2)

Publication Number Publication Date
EP3408495A1 EP3408495A1 (fr) 2018-12-05
EP3408495B1 true EP3408495B1 (fr) 2019-10-30

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP17718136.9A Active EP3408495B1 (fr) 2016-01-29 2017-01-27 Procédé permettant de contrecarrer un affaissement de terrain au voisinage d'un réservoir souterrain

Country Status (7)

Country Link
US (1) US20190040712A1 (fr)
EP (1) EP3408495B1 (fr)
ES (1) ES2762158T3 (fr)
HU (1) HUE048324T2 (fr)
NL (1) NL2016185B1 (fr)
PL (1) PL3408495T3 (fr)
WO (1) WO2017131520A1 (fr)

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US3421584A (en) * 1967-03-23 1969-01-14 Dow Chemical Co Grouting,plugging,and consolidating method
GB1257569A (fr) * 1969-03-13 1971-12-22
US3718189A (en) * 1969-07-30 1973-02-27 Exxon Production Research Co Consolidation of incompetent formations
GB1384177A (en) * 1972-06-05 1975-02-19 Exchem Holdings Method of and reinforcing elements for stabilisation of rock
US4134453A (en) * 1977-11-18 1979-01-16 Halliburton Company Method and apparatus for perforating and slotting well flow conductors
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US5026215A (en) * 1988-12-02 1991-06-25 Geochemical Corporation Method of grouting formations and composition useful therefor
US5273115A (en) * 1992-07-13 1993-12-28 Gas Research Institute Method for refracturing zones in hydrocarbon-producing wells
US6257803B1 (en) * 1998-07-23 2001-07-10 Mccabe Howard Wendell Three component chemical grout injector
CA2315468A1 (fr) * 2000-08-10 2002-02-10 Thermax International Corp. Systeme a plusieurs coulis
DE602004008294D1 (de) * 2004-10-12 2007-09-27 Schlumberger Technology Bv Injektionsvorrichtung für Bohrlochinjektion einer aktivierten Flüssigkeit
US7441598B2 (en) * 2005-11-22 2008-10-28 Halliburton Energy Services, Inc. Methods of stabilizing unconsolidated subterranean formations
US9909404B2 (en) * 2008-10-08 2018-03-06 The Lubrizol Corporation Method to consolidate solid materials during subterranean treatment operations
US8672058B2 (en) * 2009-07-14 2014-03-18 Geothermal Technologies, Inc. Method for repairing aberrations along a drill bore wall
US9206678B2 (en) * 2010-10-01 2015-12-08 Schlumberger Technology Corporation Zonal contact with cementing and fracture treatment in one trip
US8720556B2 (en) * 2011-11-30 2014-05-13 Halliburton Energy Services, Inc. Methods for initiating new fractures in a completed wellbore having existing fractures present
NL2009165C2 (en) 2012-07-10 2014-01-13 Steenmaat Beheer B V System and method for production of a primary fluid, such as oil, from an underground reservoir.
US9366124B2 (en) * 2013-11-27 2016-06-14 Baker Hughes Incorporated System and method for re-fracturing multizone horizontal wellbores
WO2015105488A1 (fr) * 2014-01-09 2015-07-16 Halliburton Energy Services, Inc. Refracturation d'une formation souterraine stimulée par fracturation
WO2016011327A2 (fr) * 2014-07-17 2016-01-21 Schlumberger Canada Limited Procédé de fracturation et de re-fracturation talon-pointe
US9670762B2 (en) * 2015-02-20 2017-06-06 Halliburton Energy Services, Inc. Fracturing tight subterranean formations with a cement composition

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Also Published As

Publication number Publication date
ES2762158T3 (es) 2020-05-22
PL3408495T3 (pl) 2020-03-31
WO2017131520A1 (fr) 2017-08-03
HUE048324T2 (hu) 2020-07-28
NL2016185A (en) 2017-08-02
EP3408495A1 (fr) 2018-12-05
NL2016185B1 (en) 2017-08-10
US20190040712A1 (en) 2019-02-07

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