EP2225342A1 - Fluide de forage a base minerale et procede de forage - Google Patents
Fluide de forage a base minerale et procede de forageInfo
- Publication number
- EP2225342A1 EP2225342A1 EP08872352A EP08872352A EP2225342A1 EP 2225342 A1 EP2225342 A1 EP 2225342A1 EP 08872352 A EP08872352 A EP 08872352A EP 08872352 A EP08872352 A EP 08872352A EP 2225342 A1 EP2225342 A1 EP 2225342A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- drilling
- solids
- fluid
- particle size
- total volume
- 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- Withdrawn
Links
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
- C09K8/02—Well-drilling compositions
- C09K8/04—Aqueous well-drilling compositions
- C09K8/05—Aqueous well-drilling compositions containing inorganic compounds only, e.g. mixtures of clay and salt
-
- 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
- C09K8/04—Aqueous well-drilling compositions
- C09K8/14—Clay-containing compositions
- C09K8/16—Clay-containing compositions characterised by the inorganic compounds other than clay
Definitions
- the present invention relates to a drilling fluid for operating in very deep areas, at high temperature and at high pressure.
- the components of the fluid are inert up to very high temperatures (up to 250-300 0 C) and its density can be adjusted beyond 2000 kg / m 3 .
- drilling fluid capable of ensuring flow, well stability and upwelling at temperatures well above 200 ° C.
- Conventional drilling fluids, or sludges generally consist of various additives (polymers, surfactants, etc.) which degrade at such temperatures.
- the object of the present invention is to obtain a drilling fluid that can perform all the functions of a fluid of this type, especially hydrostatic pressure and cleaning, obtained mainly by adjusting the density and the viscosity, in a context of very high temperature and high pressure.
- the principle of formulation of the drilling fluid according to the invention is based on the use of inert additives in the temperature range considered.
- Silica or alumina-based mineral gels which have already been widely studied for their particular properties are known.
- the micro spheres of silica are especially used as additives in cement slags to adjust their mechanical properties.
- the present invention relates to a drilling fluid for high temperature, based on brine and mixture of solids of controlled particle size, characterized in that it consists of water, dissolved salts, and insoluble solid minerals comprising at least one weighting part of particle size such that its D50 is between 1 and 25 ⁇ m and a portion of particle size colloid such that its D50 is between 0.2 and 2 ⁇ m, in that the total volume fraction of the solids is between 30 and 50% relative to the total volume, and in that the total volume comprises at least 10% by volume of said colloids.
- the drilling fluid may not include a thermally degradable viscosity additive, including natural or synthetic polymeric additives.
- the weighting part may consist of micro barite. It can also be constituted by other weighting agents, for example Mn3O4, carbonates, insofar as their particle size corresponds to the invention.
- the colloid part can consist of micro silica or micro alumina, or their mixture.
- the pH of the fluid may be greater than 7.5.
- the total volume fraction of the solids may be between 35 and 45%.
- the invention also relates to a method of drilling a very deep underground reservoir, in which a drilling fluid consisting of water, dissolved salts and a volume fraction of insoluble mineral solids comprising at least one part of particle size included such that its D50 is between 1 and 25 microns and a portion of colloids of particle size such that its D50 is between 0.2 and 2 microns, in that the rheological characteristics of said fluid are adjusted by adjusting the fraction total volume of solids, and in that the mass is adjusted volume of said fluid by adjusting the proportion of said weighting portion relative to said portion of colloids.
- said fluid may comprise at least 10% by volume of colloids, relative to the total volume.
- FIGS. 1a and 1b give the granulometric curves of the minerals used in the examples
- FIG. 2 shows the rheological variations as a function of the total solids volume fraction
- FIG. 3 illustrates the temperature stability of the fluid according to the invention.
- the drilling fluid according to the invention must be able to have a relatively high density, given the depth of drilling. Also, the concentration of barite can be high. At least one colloidal phase of micro silica or micro alumina makes it possible to create a gelled network in order to obtain the stability of the composition thus adjusted in density.
- the base fluid is a brine, for example based on CaCl 2 at high concentration to avoid changes in properties when water or brine comes during drilling.
- Other salts, or in mixture, can be used (tests with NaCl and CaCl 2 have been carried out).
- the particle size of the various solid constituents must be well controlled and close enough. Indeed, the stability of the suspensions is ensured by the control of the size of its constituents and by the control of the surface properties.
- micro barite whose particle size is mainly between 1 and 50 microns and the other colloidal phase (silica, alumina) will have a size between 0.1 and 3 microns.
- the particle size curves are given in FIG. 1 and FIG. 1b, respectively for the Chaillac barite and the micro silica used. It is clear that solids of very similar particle size distribution are also suitable.
- D50 known to those skilled in the art concerned, with the aim of the weighting minerals, for example barite, a D50 between 1 and 25 microns, and for micro silica a D50 between 0.2 and 2 microns.
- Mn3O4 manganese tetroxide
- Micromax TM by Elkem Materials
- the sludge density can be varied from 1.69 to 2.32 by varying ⁇ from 0 to 33% (maximum weighting fraction for at least 12% silica remains in relation to the total volume).
- the surface charges of the silica microspheres are thus controlled.
- the dispersed silica phase forms a gel by Van der Waals interaction between the particles.
- pH 8.5
- the silica microspheres have negative charges, but the electrostatic interactions are screened by the presence of Ca 2+ ions.
- the stability was confirmed by a Turbiscan study of the fluid according to the invention. No liquid phase appears in a long time.
- the mixture was subjected several times to a temperature of 200 ° C. for 24 hours in a pressure cell at 20 bar.
- the fluid appears with an identical appearance to the original one.
- Figure 3 shows the two rheograms obtained before and after the thermal test. There is indeed an increase in the rheological parameters and in particular a doubling of the threshold stress. However, this evolution remains entirely compatible with the use of this fluid.
- the rheological measurement after the thermal test was performed without mixing. The sample is measured as such after 24 hours in the cell, a part of the viscosity increase is therefore due to gelation over time.
Landscapes
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Inorganic Chemistry (AREA)
- Organic Chemistry (AREA)
- Dispersion Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
- Colloid Chemistry (AREA)
- Soil Conditioners And Soil-Stabilizing Materials (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0708587A FR2924720B1 (fr) | 2007-12-10 | 2007-12-10 | Fluide de forage a base minerale et procede de forage |
PCT/FR2008/001693 WO2009101290A1 (fr) | 2007-12-10 | 2008-12-04 | Fluide de forage a base minerale et procede de forage |
Publications (1)
Publication Number | Publication Date |
---|---|
EP2225342A1 true EP2225342A1 (fr) | 2010-09-08 |
Family
ID=39103045
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP08872352A Withdrawn EP2225342A1 (fr) | 2007-12-10 | 2008-12-04 | Fluide de forage a base minerale et procede de forage |
Country Status (4)
Country | Link |
---|---|
US (1) | US8563483B2 (fr) |
EP (1) | EP2225342A1 (fr) |
FR (1) | FR2924720B1 (fr) |
WO (1) | WO2009101290A1 (fr) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20090186781A1 (en) * | 2008-01-17 | 2009-07-23 | Hallibruton Energy Services, Inc., A Delaware Corporation | Drilling fluids comprising sub-micron precipitated barite as a component of the weighting agent and associated methods |
US8252729B2 (en) | 2008-01-17 | 2012-08-28 | Halliburton Energy Services Inc. | High performance drilling fluids with submicron-size particles as the weighting agent |
FR2927936B1 (fr) * | 2008-02-21 | 2010-03-26 | Vam Drilling France | Element de garniture de forage, tige de forage et train de tiges de forage correspondant |
CN111378421B (zh) * | 2018-12-28 | 2022-06-03 | 中国石油天然气股份有限公司 | 压井液及其制备方法 |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2337296A (en) * | 1941-11-06 | 1943-12-21 | Gulf Research Development Co | Drilling fluid |
US4569770A (en) * | 1984-02-13 | 1986-02-11 | Engelhard Corporation | Barium compound-containing thickening agent and drilling fluids made therefrom |
US5398758A (en) * | 1993-11-02 | 1995-03-21 | Halliburton Company | Utilizing drilling fluid in well cementing operations |
GB2315505B (en) * | 1996-07-24 | 1998-07-22 | Sofitech Nv | An additive for increasing the density of a fluid and fluid comprising such additve |
US20030203822A1 (en) * | 1996-07-24 | 2003-10-30 | Bradbury Andrew J. | Additive for increasing the density of a fluid for casing annulus pressure control |
US6794340B2 (en) * | 2002-06-25 | 2004-09-21 | Halliburton Energy Services, Inc. | Method for removing drill cuttings from wellbores and drilling fluids |
US20090186781A1 (en) * | 2008-01-17 | 2009-07-23 | Hallibruton Energy Services, Inc., A Delaware Corporation | Drilling fluids comprising sub-micron precipitated barite as a component of the weighting agent and associated methods |
-
2007
- 2007-12-10 FR FR0708587A patent/FR2924720B1/fr not_active Expired - Fee Related
-
2008
- 2008-12-04 WO PCT/FR2008/001693 patent/WO2009101290A1/fr active Application Filing
- 2008-12-04 US US12/746,930 patent/US8563483B2/en not_active Expired - Fee Related
- 2008-12-04 EP EP08872352A patent/EP2225342A1/fr not_active Withdrawn
Non-Patent Citations (1)
Title |
---|
See references of WO2009101290A1 * |
Also Published As
Publication number | Publication date |
---|---|
US20100326728A1 (en) | 2010-12-30 |
WO2009101290A1 (fr) | 2009-08-20 |
FR2924720A1 (fr) | 2009-06-12 |
US8563483B2 (en) | 2013-10-22 |
FR2924720B1 (fr) | 2010-09-17 |
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Legal Events
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AX | Request for extension of the european patent |
Extension state: AL BA MK RS |
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RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: IFP ENERGIES NOUVELLES Owner name: TOTAL S.A. |
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DAX | Request for extension of the european patent (deleted) | ||
17Q | First examination report despatched |
Effective date: 20110414 |
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Free format text: ORIGINAL CODE: EPIDOSNIGR1 |
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INTG | Intention to grant announced |
Effective date: 20160620 |
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STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
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18D | Application deemed to be withdrawn |
Effective date: 20161101 |