US20040003759A1 - Methods, well cement compositions and lightweight additives therefor - Google Patents

Methods, well cement compositions and lightweight additives therefor Download PDF

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Publication number
US20040003759A1
US20040003759A1 US10/603,489 US60348903A US2004003759A1 US 20040003759 A1 US20040003759 A1 US 20040003759A1 US 60348903 A US60348903 A US 60348903A US 2004003759 A1 US2004003759 A1 US 2004003759A1
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United States
Prior art keywords
additive
water
microspheres
present
weight
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.)
Abandoned
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US10/603,489
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English (en)
Inventor
Lance Brothers
Krista Keener
James Braden
Jan Vijn
Bach Dao
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Individual
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Individual
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Filing date
Publication date
Priority claimed from US10/005,266 external-priority patent/US6601647B2/en
Application filed by Individual filed Critical Individual
Priority to US10/603,489 priority Critical patent/US20040003759A1/en
Publication of US20040003759A1 publication Critical patent/US20040003759A1/en
Abandoned legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
    • C09K8/42—Compositions for cementing, e.g. for cementing casings into boreholes; Compositions for plugging, e.g. for killing wells
    • C09K8/46—Compositions for cementing, e.g. for cementing casings into boreholes; Compositions for plugging, e.g. for killing wells containing inorganic binders, e.g. Portland cement
    • C09K8/467—Compositions for cementing, e.g. for cementing casings into boreholes; Compositions for plugging, e.g. for killing wells containing inorganic binders, e.g. Portland cement containing additives for specific purposes
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B14/00—Use of inorganic materials as fillers, e.g. pigments, for mortars, concrete or artificial stone; Treatment of inorganic materials specially adapted to enhance their filling properties in mortars, concrete or artificial stone
    • C04B14/02—Granular materials, e.g. microballoons
    • C04B14/04—Silica-rich materials; Silicates
    • C04B14/10—Clay
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B18/00—Use of agglomerated or waste materials or refuse as fillers for mortars, concrete or artificial stone; Treatment of agglomerated or waste materials or refuse, specially adapted to enhance their filling properties in mortars, concrete or artificial stone
    • C04B18/04—Waste materials; Refuse
    • C04B18/06—Combustion residues, e.g. purification products of smoke, fumes or exhaust gases
    • C04B18/08—Flue dust, i.e. fly ash
    • C04B18/082—Cenospheres
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B20/00—Use of materials as fillers for mortars, concrete or artificial stone according to more than one of groups C04B14/00 - C04B18/00 and characterised by shape or grain distribution; Treatment of materials according to more than one of the groups C04B14/00 - C04B18/00 specially adapted to enhance their filling properties in mortars, concrete or artificial stone; Expanding or defibrillating materials
    • C04B20/0016—Granular materials, e.g. microballoons
    • C04B20/002—Hollow or porous granular materials
    • C04B20/0036—Microsized or nanosized
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
    • C04B28/02—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing hydraulic cements other than calcium sulfates
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
    • C09K8/42—Compositions for cementing, e.g. for cementing casings into boreholes; Compositions for plugging, e.g. for killing wells
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
    • C09K8/42—Compositions for cementing, e.g. for cementing casings into boreholes; Compositions for plugging, e.g. for killing wells
    • C09K8/46—Compositions for cementing, e.g. for cementing casings into boreholes; Compositions for plugging, e.g. for killing wells containing inorganic binders, e.g. Portland cement
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/91—Use of waste materials as fillers for mortars or concrete

Definitions

  • the present invention relates to methods, compositions and lightweight additives for sealing pipe strings in well bores, and more particularly, to such methods, compositions and additives wherein the well bores penetrate formations that readily fracture at low hydrostatic pressures.
  • Hydraulic cement compositions are commonly utilized in oil, gas and water well completion and remedial operations.
  • hydraulic cement compositions are used in primary cementing operations whereby strings of pipe such as casing and liners are cemented in well bores.
  • a hydraulic cement composition is pumped into the annular space between the walls of a well bore and the exterior of a string of pipe disposed therein.
  • the cement composition is permitted to set in the annular space thereby forming an annular sheath of hardened substantially impermeable cement therein.
  • the cement sheath physically supports and positions the pipe in the well bore and bonds the pipe to the walls of the well bore whereby the undesirable migration of fluids between zones or formations penetrated by the well bore is prevented.
  • the subterranean zones or formations into or through which wells are drilled have high permeabilities and low compressive and tensile strengths. As a result, the resistance of the zones or formations to shear are low and they have low fracture gradients.
  • a hydraulic cement composition is introduced into a well bore penetrating such a subterranean zone or formation, the hydrostatic pressure exerted on the walls of the well bore can exceed the fracture gradient of the zone or formation and cause fractures to be formed in the zone or formation into which the cement composition is lost.
  • lightweight cement compositions have been developed and used, subterranean zones or formations are often encountered which have fracture gradients too low for the lightweight cement compositions to be utilized without the formation of fractures and the occurrence of lost circulation problems.
  • the present invention provides lightweight well cement compositions, additives for use in the compositions and methods of using the lightweight compositions for sealing pipe in well bores penetrating zones or formations having low fracture gradients which meet the needs described above and overcome the deficiencies of the prior art.
  • the methods of this invention basically comprise the steps of providing a lightweight cement composition comprised of a hydraulic cement, water and an additive comprising a suspension of microspheres in water gelled or thickened with a water swellable clay suspending agent.
  • the cement composition is placed into the annulus between a pipe and the walls of a well bore and the sealing composition is allowed to set into a hard impermeable mass.
  • a lightweight sealing composition of this invention is basically comprised of a hydraulic cement, water and an additive for making the cement composition lightweight.
  • the additives of this invention are comprised of aqueous suspensions of microspheres gelled or thickened with a water swellable clay suspending agent.
  • the methods of this invention for sealing a pipe in a well bore penetrating a zone or formation which readily fractures at low hydrostatic pressures is basically comprised of providing a lightweight cement composition comprised of a hydraulic cement, water and an additive comprising a suspension of microspheres in water gelled or thickened with a water swellable clay suspending agent.
  • the lightweight cement composition is placed into the annulus between the exterior surfaces of the pipe and the walls of the well bore and the cement composition is allowed to set into a hard impermeable mass therein.
  • a variety of hydraulic cements can be utilized in accordance with the present invention including those comprised of calcium, aluminum, silicon, oxygen and/or sulfur which set and harden by reaction with water.
  • Such hydraulic cements include Portland cements, slag cements, pozzolana cements, gypsum cements, aluminous cements and silica cements.
  • Portland cements or their equivalents are generally preferred for use in accordance with the present invention.
  • Portland cements of the types defined and described in the API Specification For Materials And Testing For Well Cements, API Specification 10, 5 th Edition, dated Jul. 1, 1990 of the American Petroleum Institute are particularly suitable.
  • Preferred API Portland cements include Classes A, B, C, G and H with Classes G and H being more preferred, and Class G being the most preferred.
  • the mix water utilized to form the cement compositions of this invention can be fresh water, unsaturated salt solutions or saturated salt solutions.
  • the water is included in the cement compositions of this invention in an amount in the range of from about 60% to about 250% by weight of hydraulic cement therein.
  • the additive which is included in the cement compositions of this invention to make the compositions lightweight is basically comprised of a suspension of microspheres in water gelled or thickened with a water swellable clay suspending agent. While various microspheres can be utilized, fly ash microspheres are preferred for use in the present invention. Particularly suitable such fly ash microspheres are commercially available from Halliburton Energy Services, Inc. of Duncan, Okla. under the tradename “SPHERELITETM”. Another type of microspheres that can be used is synthetic hollow glass microspheres commercially available from Minnesota Mining and Manufacturing Company (3MTM) under the tradename “SCOTCHLITETM”.
  • microspheres are formed of a chemically stable soda-lime borosilicate glass composition which is non-porous.
  • the microspheres used are included in the aqueous microsphere suspension in a general amount in the range of from about 30% to about 100% by weight of water in the suspension.
  • the microspheres are included in the suspension in an amount of about 67% by weight of water therein.
  • the water swellable clay suspending agents which can be used include, but are not limited to sodium bentonite, attapulgite, kaolinite, meta-kaolinite, hectorite or sepiolite. Of these, sodium bentonite is preferred.
  • the clay suspending agent used is included in the aqueous suspension in an amount in the range of from about 1% to about 4% by weight of the water therein, preferably an amount of about 2% by weight of the water therein.
  • the lightweight additive is included in the cement composition in an amount in the range of from about 30% to about 100% by weight of hydraulic cement therein.
  • various conventional additives can be included in the lightweight sealing compositions of this invention including, but not limited to, set retarders, set accelerators, fluid loss control additives and dispersants.
  • a preferred method of this invention for sealing pipe in a well bore penetrating a zone or formation which readily fractures at low hydrostatic pressures is comprised of the steps of: (a) providing a lightweight cement composition comprised of a hydraulic cement, mix water and an additive comprising an aqueous suspension of microspheres containing a water swellable clay suspending agent; (b) placing the cement composition between the exterior surfaces of the pipe and the walls of the well bore; and (c) allowing the cement composition to set into a hard impermeable mass.
  • a more preferred method of the present invention for sealing pipe in a well bore penetrating a zone or formation which readily fractures at low hydrostatic pressures is comprised of the steps of: (a) providing a lightweight cement composition comprised of a hydraulic cement, mix water present in the composition in an amount in the range of from about 60% to about 250% by weight of the hydraulic cement therein and an additive comprising an aqueous suspension of microspheres containing water, fly ash microspheres and a sodium bentonite suspending agent present in the cement composition in an amount in the range of from about 30% to about 100% by weight of hydraulic cement therein; (b) placing the cement composition into the annulus between the pipe and the walls of the well bore; and (c) allowing the cement composition to set into a hard impermeable mass.
  • a preferred lightweight well cement composition of this invention is comprised of: a hydraulic cement; mix water selected from the group of fresh water, unsaturated salt solutions and saturated salt solutions present in an amount in the range of from about 60% to about 250% by weight of the hydraulic cement in the composition; and an additive comprised of an aqueous suspension of microspheres containing water, microspheres and a sodium bentonite suspending agent present in an amount in the range of from about 30% to about 100% by weight of hydraulic cement in the composition.
  • a preferred lightweight cement composition additive of this invention is comprised of an aqueous suspension of microspheres containing water, microspheres and a sodium bentonite suspending agent.
  • a more preferred lightweight cement composition additive of this invention is comprised of: an aqueous suspension of fly ash microspheres containing water, fly ash microspheres and a sodium bentonite suspending agent, the fly ash microspheres being present in an amount in the range of from about 30% to about 100% by weight of water in the additive; and the sodium bentonite suspending agent being present in an amount in the range of from about 1% to about 4% by weight of water in the additive.
  • the most preferred lightweight cement composition additive of this invention is comprised of: an aqueous suspension of fly ash microspheres containing water, fly ash microspheres and a sodium bentonite suspending agent, the fly ash microspheres being present in an amount of about 67% by weight of water in the additive; and the sodium bentonite being present in an amount of about 2% by weight of water in the additive.
  • a lightweight additive of this invention was prepared by hydrating 20 grams of sodium bentonite in 1000 grams of water. To 600 grams of the resulting water gelled with sodium bentonite, 400 grams of fly ash microspheres were added. 300 grams of Portland cement were then mixed with 300 grams of the lightweight additive and 150 grams of fresh water. The resulting cement slurry was subjected to 4000 psi of pressure to simulate the hydraulic pressure at the bottom of a well bore. After being subjected to the applied pressure, the density of the slurry was 11.2 lb/gal. The slurry was poured into a plexiglass tube measuring 12 inches in length and 1.75 inches internal diameter.
  • the slurry was then allowed to set to form a hardened mass after which a one inch section was cut from the top and bottom of the plexiglass tube.
  • the hardened cement was removed from the one inch sections of the tube and their densities determined.
  • the density of the bottom section was 11.1 lb/gal and the density of the top section was 11.3 lb/gal. This shows that, within experimental error, the cement was uniform in density and the experimental liquid additive was effective in preparing a lightweight cement.
US10/603,489 2001-12-03 2003-06-25 Methods, well cement compositions and lightweight additives therefor Abandoned US20040003759A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US10/603,489 US20040003759A1 (en) 2001-12-03 2003-06-25 Methods, well cement compositions and lightweight additives therefor

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US10/005,266 US6601647B2 (en) 2001-12-03 2001-12-03 Methods, well cement compositions and lightweight additives therefor
US10/103,449 US6631766B2 (en) 2001-12-03 2002-03-21 Methods, well cement compositions and lightweight additives therefor
US10/603,489 US20040003759A1 (en) 2001-12-03 2003-06-25 Methods, well cement compositions and lightweight additives therefor

Related Parent Applications (1)

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US20040003759A1 true US20040003759A1 (en) 2004-01-08

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US10/603,483 Expired - Lifetime US6811603B2 (en) 2001-12-03 2003-06-25 Methods, well cement compositions and lightweight additives therefor

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EP (1) EP1316540A3 (fr)
CA (1) CA2413314C (fr)
NO (1) NO339168B1 (fr)

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US20040007163A1 (en) 2004-01-15
NO20025777L (no) 2003-06-04
NO339168B1 (no) 2016-11-14
EP1316540A2 (fr) 2003-06-04
CA2413314C (fr) 2009-06-02
EP1316540A3 (fr) 2010-06-02
US6811603B2 (en) 2004-11-02
NO20025777D0 (no) 2002-12-02
CA2413314A1 (fr) 2003-06-03

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