WO2004022668A1 - Reduction de la perte de fluide dans un fluide de forage - Google Patents

Reduction de la perte de fluide dans un fluide de forage Download PDF

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Publication number
WO2004022668A1
WO2004022668A1 PCT/US2003/026930 US0326930W WO2004022668A1 WO 2004022668 A1 WO2004022668 A1 WO 2004022668A1 US 0326930 W US0326930 W US 0326930W WO 2004022668 A1 WO2004022668 A1 WO 2004022668A1
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WO
WIPO (PCT)
Prior art keywords
oil
drilling
drilling fluid
styrene
fluid
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Application number
PCT/US2003/026930
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English (en)
Inventor
Bharat B. Patel
Original Assignee
Chevron Phillips Chemical Company L.P.
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Application filed by Chevron Phillips Chemical Company L.P. filed Critical Chevron Phillips Chemical Company L.P.
Priority to AU2003265802A priority Critical patent/AU2003265802A1/en
Publication of WO2004022668A1 publication Critical patent/WO2004022668A1/fr

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    • 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
    • C09K8/02—Well-drilling compositions
    • C09K8/32—Non-aqueous well-drilling compositions, e.g. oil-based

Definitions

  • the invention relates generally to substantially reducing fluid loss in oil-base drilling fluid by adding an effective amount of a styrene-butadiene-styrene (SBS) block polymer having 25% or more styrene to the drilling fluid.
  • SBS styrene-butadiene-styrene
  • Drilling fluids are used in the process of drilling bore holes in subterranean deposits such as gas and oil.
  • the boring is accomplished by well drilling tools and a drilling fluid.
  • Drilling fluids serve to cool and lubricate the drill bits, to carry the cuttings to the surface as the drilling fluid is circulated in and out of the well; to support at least part of the weight of the drilling pipe and drill bit; to provide a hydrostatic pressure head to prevent caving in of the walls of the well bore, to deposit on the surface of the well bore a filter cake which acts as a thin, semi-pervious layer to prevent undue passage therethrough of drilling fluids; and to perform other functions as are well-known in the drilling art.
  • Drilling fluids contain additives and conditioning agents that are important in determining the fluid loss properties of the drilling fluid, as well as inhibiting shale and clay disintegration.
  • U.S. Patent No. 5,909,779 discloses that such additives or agents include modified lignite, polymers, oxidized asphalt, gilsonite, humates prepared by reacting humic acid with amide or polyalkyl polyamines.
  • the amount of fluid loss agent added are usually less than 10% by weight, and preferably, less than 5% by weight or volume of the drilling fluid.
  • U.S. Patent No. 5,883,054 discloses adding a random styrene-butadiene (SBR) copolymers having an average molecular weight greater than about 500,000 g/mol to an oil- based drilling fluid to make a thermally stable drilling fluid system.
  • the concentration of SBR is about 1 to about 6 pounds per barrel.
  • the resultant drilling fluid system exhibits fluid loss-control at high temperatures and high pressure conditions.
  • the reference compared the fluid loss (ml/30min) of a block styrene-butadiene copolymer (30% styrene) to a random SBR copolymer.
  • the fluid loss property of the random SBR is disclosed to be significantly better than a random SBR copolymer.
  • U.S. Patent Nos. 5,925,182 and 5,834,573 disclose adding an oil soluble block or random copolymers to water-based drilling fluids, milling fluids, and mining fluids.
  • the copolymers comprise styrene-isoprene and styrene-butadiene and can be present in the fluid in an amount ranging from about 0.1 to about 10 wt. %.
  • the copolymer provides a stable liquid composition for use in water-based drilling fluid.
  • the reference does not disclose that radial block copolymers of styrene and butadiene significantly reduce fluid loss in drilling fluids.
  • 6,034,037 discloses a synthetic fluid-based drilling fluid containing up to 30 pounds per barrel of a polymeric fluid loss control agent comprising a polymer consisting of at least two monomers selected from the group consisting of styrene, butadiene and isoprene.
  • U.S. Patent No. 6,017,854 discloses a non-aqueous drilling fluid containing a linear KRATON® (sold by Kraton Polymers, Inc.) SBS or styrene-isoprene-styrene (SIS) block copolymer as a viscosifying/fluid loss agent to help prevent fluid loss.
  • KRATON® polymers specifically disclosed are KRATON® G polymers and ICRATON® D1101, 1102 and 1107 polymers. These are linear, and not radial block copolymers.
  • radial styrene-butadiene block copolymers containing 25% or more styrene such as KRATON® D1184, improve the fluid loss property of a drilling fluid by at least 55%. and more preferably by at least 60%, when compared to a drilling fluid that does not contain the radial copolymer.
  • radial block copolymers of styrene and butadiene such as KRATON® D1184, D1184G and D1122X unexpectedly provides excellent fluid loss properties in drilling fluids.
  • the object of this invention is to provide an oil-base drilling fluid having improved fluid loss properties.
  • SBS block copolymer containing 25% or more styrene SBS block copolymer containing 25% or more styrene.
  • This invention relates to a method for improving the fluid loss in an oil-based drilling fluid.
  • a drilling fluid is used in combination with a rotating drill bit to drill a borehole in a subterranean formation.
  • the drilling method comprises the steps of rotating a drill bit in the borehole and introducing the drilling fluid into the borehole to pick up the drill cuttings and carrying at least a portion of the drill cuttings out of the borehole.
  • the drilling system employed in such method comprises the subterranean formation, the borehole penetrating the subterranean formation, the drill bit suspended in the borehole, and the drill fluid located in the borehole and proximate the drill bit.
  • the drilling fluid for purposes of this invention is a fluid having the following ingredients: an oil-base drilling mud, a weighting agent and optional ingredients such as asphalt, gilsonite and modified lignite.
  • the drilling mud is a composition having the following components: oil, brine, lime, a viscosifier and gelling agent, and an emulsifier and wetting agent.
  • the oil can be diesel oil; a low toxicity synthetic oil such as ESCAID® 110 (Exxon Mobile Corp.), NOVAPLUS® drilling fluid (from M-I Drilling Fluids L.L.C.) or SARALINE® (Unical Corp); an alpha-olefinic oil, or a non-synthetic oil such as mineral oil.
  • a low toxicity oil is one that is not carcinogenic and environmentally friendly, and is safer than conventional diesel oil.
  • the brine typically includes a salt such as calcium chloride.
  • the viscosifier and gelling agent can be an organophilic clay such as hectorite, bentonite and mixtures thereof.
  • the emulsifiers and wetting agents include surfactants and ionic surfactants such as fatty acids, amines, amides and organic sulphonates and mixtures thereof.
  • the weighting agents include materials such as barite, hematic, calcium carbonate, galena, siderite and mixtures thereof. Weighting agent is added to the drilling mud to adjust the density.
  • the viscosifying/fluid loss agent of the present invention is a block copolymer having a radial architecture.
  • Block copolymers are thermoplastic elastomeric or rubber compounds in which the polymer chains have either a linear or radial (i.e., multiarm or star-shaped) configuration.
  • the polymer chains can be di-block, tri-block or multiblock.
  • Di-block copolymers comprise hydrogenated copolymers having an A-B architecture.
  • the di-block copolymer comprises one polystyrene block or random polymer block derived from predominantly styrene and a minor amount of a conjugated diene, and one block of polyisoprene or poly-l,3-butadiene which has been hydrogenated after the polymerization to at least 80 mol % of the original unsaturation in the polybutadiene or polyisoprene block.
  • Polymer blocks A are prepared from, for example, styrene, alpha- methylstyrene, 2,4-dichlorostyrene, p-methoxystyrene, p-methylstyrene, 3,4-dimethylstyrene, m-tert-butylstyrene, p-phenylstyrene, p-acetoxystyrene, divinylbenzene, 1-vmylnaphthalene, 3,5-diethylstyrene, 4-n-propylstyrene, 2,4,6-trimethylstyrene, 4-p-tolylstyrene, 3,5- diphenylstyrene, 3-ethyl-vinylnaphthalene, 8-phenyl-l-vinylnaphthalene, or mixtures thereof.
  • Polymer blocks B are prepared from, for example, 1,3-butadiene, 2-methyl-l,3-butadiene (isoprene), 1,3-pentadienes (piperylenes), 2,3-dimethyl-l,3-butadiene, 2-methyl-l,3- pentadiene, 2,3-dimethyl-l,3-pentadiene, 2-phenyl-l,3-butadiene, 1-phenyl- 1,3-butadiene, or mixtures thereof.
  • linear di-block copolymers include styrene-butadiene (SBR) and styrene-ethylene/propylene (SEP).
  • the tri-block rubbers have poly(vinylaromatic) such as polystyrene segments (S) on the ends of the molecule and a rubber segment in the center, hi some instances, the elastomeric portion of these polymers is a saturated olefin rubber (e.g., ethylene/butylene (EB), ethylene/propylene (EP)). hi other instances, the rubber segment is unsaturated (e.g., butadiene (B), isoprene (I)). Due to their saturated nature, molecules containing a saturated olefin rubber are very stable at elevated temperatures.
  • poly(vinylaromatic) such as polystyrene segments (S) on the ends of the molecule and a rubber segment in the center
  • the elastomeric portion of these polymers is a saturated olefin rubber (e.g., ethylene/butylene (EB), ethylene/propylene (EP)).
  • the rubber segment is unsaturated (e.g., buta
  • tri-block copolymers examples include styrene-butadiene-styrene (SBS) and styrene-ethylene-butylene-styrene (SEBS) and styrene-isoprene-styrene (SIS). These copolymers can be linear or radial (branched or "star shaped").
  • the block copolymer of the present invention is a radial styrene-butadiene- styrene (SBS) block copolymer containing 25% or more styrene, preferably 25% to 50% styrene, and more preferably 30% to 38% styrene.
  • SBS radial styrene-butadiene- styrene
  • An example of such a block copolymer is KRATON® Dl 184 from Kraton Polymers.
  • KHATON® polymers in drilling fluids is known.
  • U.S. Patent No. 6,017,854 discloses adding KRATON® G copolymers, in particular KRATON® G1702, as a viscosifying/fluid loss agent to a low toxic synthetic drilling fluid such as SARALINE®.
  • the patent further discloses KRATON® Dl 101, 1102 and 1107.
  • KRATON® G1702 is a di-block copolymer comprising a linear styrene-ethylene/proplyene (SEP) block copolymer comprising 28% styrene and 72% of the ethylene/propylene.
  • SEP linear styrene-ethylene/proplyene
  • the total block copolymer concentration in the drilling fluid is from about 0.01 to 10 wt %.
  • the fluid loss is disclosed to be 1.4 ml/30 min.
  • the patent does not disclose a fluid loss reading for the drilling fluid without the KRATON® G1702. Therefore, it is unclear what the improvement would have been.
  • a comparison made in Example 1 set forth below only shows a 9% improvement in fluid loss using KRATON® G1702 as compared to over 55% using KRATON® D1184 when about 0.2 wt. % of the block copolymer is added to the drilling fluid.
  • the concentration of the block copolymer in the low toxicity drilling fluid is in the range of about 0.02% to about 3% by weight of the oil-base drilling mud, preferably about 0.05%) to about 2% by weight of the oil-base drilling mud, and more preferably about 0.1 %> to about 1%) by weight of the oil-base drilling mud.
  • oil-based drilling fluid compositions containing SBS radial block copolymers with more than 25 % styrene provide lower/better HTHPFL than the compositions containing the SBS radial polymer with 23% styrene, SBS linear, SIS radial, and SEP linear polymers known in the art. Further, the compositions containing the SBS radial polymers with more than 25% styrene also have very good anti-settling properties.
  • EXAMPLE 1 An oil-base drilling mud, OBM #1, was prepared by mixing 44.3 grams of lime; 44.3 grams of VG 69® from (M-I Drilling Fluids L.L.C., Houston, Texas), an organophilic clay; 44.3 grams of VERSAMUL® (M-I Drilling Fluids), a multi-purpose emulsifier; 9.6 grams of VERSACOAT® (M-I Drilling Fluids), an organic surfactant; and 700 grams of calcium chloride (10 pounds per gallon) brine into 1325 grams of ESCAJD® 110 (a low toxic synthetic drilling fluid from Exxon Mobil Corporation, Fairfax, VA).
  • ESCAJD® 110 a low toxic synthetic drilling fluid from Exxon Mobil Corporation, Fairfax, VA
  • OBM #1 was used for preparing eight drilling fluid compositions shown in Table 1.
  • the compositions shown in Table 1 include the following ingredients: OBM #1 drilling mud, barite (a weighting agent) and rev dust to simulate solids in the drilling fluid.
  • the ingredients were added while the fluids were being mixed with a Multimixer. After the addition of each ingredient, the mixing time is shown in parenthesis for each composition shown in Table 1. After the mixing completed, the fluids were rolled in closed containers in an oven for 16 hours. The oven was maintained at about 250° F during the rolling of the fluids.
  • Runs 2-8 contain 0.34% of the block copolymer based on the weight of the drilling fluid.
  • Runs 2 and 3 represent drilling fluid compositions of the present invention using KRATON® D1184, an SBS block copolymer having a radial architecture and having 28% styrene content.
  • Run 4 is also a composition of the present invention using KRATON® D1122X , an SBS block copolymer having a radial architecture and having 38% styrene content.
  • Run 5 is not within the scope of the invention since the block copolymer contains less than 25% styrene while Runs 6 and 8 are not within the scope of the invention because the block copolymers are linear, and not radial. Run 7 is also not within the scope of the invention in that it contains an SIS block copolymer.
  • Run 4 the HTHPFL value when compared to the HTHPFL value of Run 1 was reduced by 72%,
  • the compositions of runs 2, 3, and 4 also provided higher yield points, higher viscosity dial readings at 6 RPM and 3 RPM readings than the compositions of Runs 1, 5, 6 and 8.
  • the high yield point in combination with high 6 and 3 RPM readings, and high gels indicate very good anti-settling properties of the fluids. Even though the fluid of Run 7 exhibited very good anti-settling properties, it gave the second highest HTHPFL. Run 1, which did not contain any polymer, gave the highest HTHPFL.
  • EXAMPLE 2 [0027] This Example shows that, an oil-based drilling fluid composition containing KRATON® D1184G provides lower/better HTHPFL than the compositions containing SHELL VIS® 40 polymer (a hydrogenated styrene-isoprene copolymer from Infmeum, the ShelkExxon additive company). Further, the composition with Dl 184G polymer has the best anti-settling properties.
  • compositions for this Example were prepared as follows: An oil-base mud (OBM #3) was prepared in a manner similar to the preparation of OBM #1 in Example 1. OBM # 3 was mixed with barite and rev dust in the amounts set forth in Table 3 to form three drilling fluid compositions. The barite and rev dust were added while the fluids were being mixed with the Multimixer. The mixing time after the addition of each ingredient is shown in parenthesis in minutes in Table 3 after each ingredient.
  • the fluids were rolled in closed containers in an oven for 4 hours. The oven was maintained at around 150° F during the rolling of the fluids. The fluids were then cooled to around 90° F and mixed 10 minutes on the Multimixer. After testing the fluids were further rolled 16 hours in the oven at 250° F and cooled to around 90° F. Then, they were mixed 10 minutes on the Multimixer and tested according to the "Recommended Practice Standard Procedure for Field Testing Oil-Based Drilling Fluids, API Recommended Practice 13B-2 (RP 13B-2)". These results after rolling at 250° F are presented in Table 4. Next, the fluids were aged 16 hours in the oven at 300° F and, after cooling to around 100° F and mixing 10 minutes, they were tested again. These test results after aging at 300° F are presented in Table 5 below.
  • the drilling fluid composition of within the present invention (Run 10) provided the lowest HTHPFL. This composition also had the highest 6 and 3 rpm reading, and the highest yield point and gel strength values indicating that the anti-settling properties are better for the fluid of Run 10 than the fluids of Runs 9 and 11. TABLE 4
  • EXAMPLE 3 [0030] This Example shows that the SBS radial block copolymer (KRATON® D1184) provides lower/better HTHPFL than the SHELLVIS® 40 polymer in a sample of NOVAPLUS® drilling fluid (M-I Drilling Fluids L.L.C.). Further, KRATON@ D1184G polymer also improves anti-settling properties of the mud.
  • KRATON® D1184 provides lower/better HTHPFL than the SHELLVIS® 40 polymer in a sample of NOVAPLUS® drilling fluid (M-I Drilling Fluids L.L.C.). Further, KRATON@ D1184G polymer also improves anti-settling properties of the mud.

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  • Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Compositions Of Macromolecular Compounds (AREA)

Abstract

La réduction de la perte de fluide dans un fluide de forage, par l'ajout, au fluide de forage, de 0,1 à 10 % en poids d'un copolymère séquencé styrène-butadiène-styrène (SBS) radial présentant au moins 25 % de styrène, permet d'obtenir une amélioration inattendue au niveau de la propriété de perte de fluide du fluide de forage, par le biais de la diminution de la valeur HTHPEF d'au moins 55 %.
PCT/US2003/026930 2002-09-03 2003-08-28 Reduction de la perte de fluide dans un fluide de forage WO2004022668A1 (fr)

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AU2003265802A AU2003265802A1 (en) 2002-09-03 2003-08-28 Reducing fluid loss in a drilling fluid

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US60/407,298 2002-09-03

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004053017A1 (fr) * 2002-12-06 2004-06-24 Chevron Phillips Chemical Company Lp Reduction de pertes fluidiques dans un fluide de forage
GB2452113A (en) * 2007-06-19 2009-02-25 Clearwater Int Llc Oil based concentrated slurries and methods for making and using same
US9394472B2 (en) 2014-03-27 2016-07-19 Kraton Polymers U.S. Llc Low fluid loss drilling fluid compositions comprising diblock copolymers
WO2016162386A1 (fr) * 2015-04-07 2016-10-13 Rhodia Operations Polymères séquencés pour le contrôle du filtrat et de la rhéologie
WO2016162387A1 (fr) * 2015-04-07 2016-10-13 Rhodia Operations Polymères séquencés pour le contrôle du filtrat
CN110184039A (zh) * 2019-06-24 2019-08-30 河北硅谷化工有限公司 钻井液用抗高温降粘剂

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5631313A (en) * 1990-04-24 1997-05-20 Phillips Petroleum Company Suspending medium for particulate material
US5883054A (en) * 1997-09-19 1999-03-16 Intevep, S.A. Thermally stable drilling fluid
US6017854A (en) * 1997-05-28 2000-01-25 Union Oil Company Of California Simplified mud systems

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5631313A (en) * 1990-04-24 1997-05-20 Phillips Petroleum Company Suspending medium for particulate material
US6017854A (en) * 1997-05-28 2000-01-25 Union Oil Company Of California Simplified mud systems
US5883054A (en) * 1997-09-19 1999-03-16 Intevep, S.A. Thermally stable drilling fluid

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004053017A1 (fr) * 2002-12-06 2004-06-24 Chevron Phillips Chemical Company Lp Reduction de pertes fluidiques dans un fluide de forage
GB2452113A (en) * 2007-06-19 2009-02-25 Clearwater Int Llc Oil based concentrated slurries and methods for making and using same
GB2452113B (en) * 2007-06-19 2012-02-01 Clearwater Int Llc Oil based concentrated slurries and method for making and same
US8728989B2 (en) 2007-06-19 2014-05-20 Clearwater International Oil based concentrated slurries and methods for making and using same
US9605195B2 (en) 2007-06-19 2017-03-28 Lubrizol Oilfield Solutions, Inc. Oil based concentrated slurries and methods for making and using same
US9394472B2 (en) 2014-03-27 2016-07-19 Kraton Polymers U.S. Llc Low fluid loss drilling fluid compositions comprising diblock copolymers
EP3122815A4 (fr) * 2014-03-27 2017-10-18 Kraton Polymers U.S. LLC Compositions de fluide de forage comprenant des copolymères séquencés à deux blocs
FR3034777A1 (fr) * 2015-04-07 2016-10-14 Rhodia Operations Polymeres sequences pour le controle du filtrat et de la rheologie
FR3034776A1 (fr) * 2015-04-07 2016-10-14 Rhodia Operations Polymeres sequences pour le controle du filtrat
WO2016162387A1 (fr) * 2015-04-07 2016-10-13 Rhodia Operations Polymères séquencés pour le contrôle du filtrat
WO2016162386A1 (fr) * 2015-04-07 2016-10-13 Rhodia Operations Polymères séquencés pour le contrôle du filtrat et de la rhéologie
CN107683271A (zh) * 2015-04-07 2018-02-09 罗地亚经营管理公司 用于监测滤液的序列聚合物
CN107683296A (zh) * 2015-04-07 2018-02-09 罗地亚经营管理公司 用于监测滤液和流变学的序列聚合物
AU2016245911B2 (en) * 2015-04-07 2020-08-06 Energy Solutions (US) LLC Sequenced polymers for monitoring the filtrate and the rheology
CN107683271B (zh) * 2015-04-07 2021-10-19 罗地亚经营管理公司 用于监测滤液的序列聚合物
US11345845B2 (en) 2015-04-07 2022-05-31 Rhodia Operations Sequenced polymers for monitoring the filtrate and the rheology
US11427747B2 (en) 2015-04-07 2022-08-30 Rhodia Operations Sequenced polymers for monitoring the filtrate
CN110184039A (zh) * 2019-06-24 2019-08-30 河北硅谷化工有限公司 钻井液用抗高温降粘剂

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