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WO1999048994A1 - Saumure contenant un melange de formiate et de bromure et utilisee dans les fluides de forage - Google Patents

Saumure contenant un melange de formiate et de bromure et utilisee dans les fluides de forage Download PDF

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Publication number
WO1999048994A1
WO1999048994A1 PCT/SE1999/000253 SE9900253W WO9948994A1 WO 1999048994 A1 WO1999048994 A1 WO 1999048994A1 SE 9900253 W SE9900253 W SE 9900253W WO 9948994 A1 WO9948994 A1 WO 9948994A1
Authority
WO
WIPO (PCT)
Prior art keywords
salt
bromide
formate
saturated aqueous
weight
Prior art date
Application number
PCT/SE1999/000253
Other languages
English (en)
Inventor
Carl-Axel SJÖGREEN
Bengt SALLMÉN
Original Assignee
Perstorp Ab
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 Perstorp Ab filed Critical Perstorp Ab
Priority to AU29658/99A priority Critical patent/AU2965899A/en
Publication of WO1999048994A1 publication Critical patent/WO1999048994A1/fr

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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
    • C09K8/02—Well-drilling compositions
    • C09K8/04—Aqueous well-drilling compositions

Definitions

  • the present invention relates to the use of a saturated aqueous solution, comprising at least one formate salt and at least one bromide salt, in drilling fluids
  • Well servicing fluids such as drilling fluids, for land based as well as offshore oil drilling have normally and for many years been oil based.
  • Changes in the environmental legislation have forced the industry to seek other types of drilling fluids and a frequently applied solution is the use of a pseudo oil based mud, which is based on synthetic hydrocarbons.
  • pseudo oil based mud which is based on synthetic hydrocarbons.
  • biodegradation both aerobic and anaerobic. Common to all is that they do affect the environment, either by staying on the seabed for many years or by degrading rapidly with short but more drastic effects on the environment.
  • Low solids drilling fluids based on formates were originally designed to minimise frictional pressure losses in slim hole drilling.
  • their unique capability of stabilising polymers to high temperatures made them more temperature resistant than any other polymer based drilling fluids.
  • Formates and bromides are, because of their high density and low corrosivity, ideal completion and packer fluids and are compatible with reservoir fluids, good shale stabilisers, gas hydrate inhibitors and scale dissolvers.
  • Formates have for instance also been shown to be environmentally more acceptable than other commonly used brine system, shale stabilising and compatible with reservoir fluids and common drilling equipment materials. At higher densities, however, the formates are the only known brines that can increase the transition temperature of xanthan.
  • mixed brines comprising at least one formate salt and at least one bromide salt advantageously can be used in drilling fluids, such as oil well drilling fluids.
  • the total solubility that is the total salt content and the density of the brine, at a given temperature is for the mixed brine according to the present invention higher than the solubility for respective salt.
  • the brine use according to the present invention is a saturated aqueous solution comprising 40-50% by weight of water and 50-60% by weight of salts.
  • the salts are at least one formate, preferably an alkali metal formate, and at least one bromide, likewise preferably an alkali metal bromide in a weight ratio formate to bromide of 30:70 to 60:40.
  • Said saturated aqueous solution has a higher salt content and a higher density than can be obtained with respective included salt per se and most important higher than a saturated aqueous solution of included bromide salt.
  • the salts of the aqueous solution used according to the present invention are as previously disclosed preferably salts of alkali metals and may thus include formates and bromides of the same or different alkali metals or combinations of different alkali metal formates and/or bromides.
  • the preferred alkali metals include potassium, sodium and/or caesium. The most preferred alkali metal is sodium.
  • Saturated aqueous solutions of sodium formate and sodium bromide are suitably prepared at a temperature of 0-50°C giving a brine density of for instance 1.50-1.60 g/cm 3 .
  • a preferred temperature range is 5-15°C, such as 8-12°C, whereby the density of the brine at said temperature is 1.51-1.54 g/cm 3 .
  • a further suitable preparation temperature is to be found within the range of 15-30°C, such as 20-25°C, whereby the density of the brine at said temperature is 1.53-1.57 g/cm 3 .
  • Example 1 discloses preparation at 22°C of saturated aqueous salts solutions comprising sodium formate and sodium bromide and Example 2 is Example 1 repeated at a temperature of 10°C. While particular embodiments of the invention is shown, it will be understood, of course, that the invention is not limited thereto since many modifications may be made, and it is, therefore, contemplated to cover by the appended Claims any such modifications as fall within the true spirit and scope ofthe invention.
  • Solution no. Sodium Formate Sodium Bromide Total Salt Content Density Content, %-w/w Content, %-w/w %-w/w g/cm 3
  • Solution no. Sodium Formate Sodium Bromide Total Salt Content Density Content, %-w/w Content, %-w/w %-w/w g/cm 3
  • the total solubility (total salt content) at respective temperature is higher than the solubility for respective salt. It can from solutions A-D of Examples 1 and 2, furthermore, be seen that the density of the mixed solutions are higher than the density for sodium bromide as well as for sodium formate at respective temperature.

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  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Fertilizers (AREA)

Abstract

L'invention se rapporte à l'utilisation dans un fluide de forage d'une solution saline aqueuse saturée qui contient au moins un sel de type formiate et au moins un sel de type bromure. Ladite solution saline aqueuse saturée comporte 40 à 50 % en poids d'eau et 50 à 60 % en poids desdits sels avec un rapport pondéral du formiate au bromure compris entre 30 :70 et 60 :40. Les sels préférés sont des formiates et des bromures de métaux alcalins. Ladite solution saline aqueuse saturée possède une densité et une concentration globale en sels supérieures à celles d'une solution aqueuse saturée du sel de type bromure.
PCT/SE1999/000253 1998-03-23 1999-02-24 Saumure contenant un melange de formiate et de bromure et utilisee dans les fluides de forage WO1999048994A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU29658/99A AU2965899A (en) 1998-03-23 1999-02-24 A mixed formate and bromide brine used in drilling fluids

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE9800958-2 1998-03-23
SE9800958A SE514022C2 (sv) 1998-03-23 1998-03-23 En blandad formiat- och bromidsaltlösning för användning i borrvätskor

Publications (1)

Publication Number Publication Date
WO1999048994A1 true WO1999048994A1 (fr) 1999-09-30

Family

ID=20410645

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE1999/000253 WO1999048994A1 (fr) 1998-03-23 1999-02-24 Saumure contenant un melange de formiate et de bromure et utilisee dans les fluides de forage

Country Status (3)

Country Link
AU (1) AU2965899A (fr)
SE (1) SE514022C2 (fr)
WO (1) WO1999048994A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002064697A3 (fr) * 2001-02-14 2002-11-21 Cabot Specialty Fluids Inc Liquides de forage contenant un formate de metal alcalin
WO2003029612A1 (fr) * 2001-09-28 2003-04-10 Stephen Atkinson Procédé de récupération d'hydrocarbures dans des hydrates
US7211550B2 (en) 2000-07-14 2007-05-01 Cabot Corporation Compositions for controlling scaling and completion fluids
CN101555784B (zh) * 2009-06-01 2013-04-17 李向东 一种洁净的天然气开采方法
CN110484220A (zh) * 2019-08-02 2019-11-22 中国石油集团川庆钻探工程有限公司长庆钻井总公司 一种提高大丛井大斜度井滑动效率的钻井液及施工方法
US10577300B2 (en) 2018-06-12 2020-03-03 Saudi Arabian Oil Company Synthesis of sodium formate and drilling fluid comprising the same

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2250761A (en) * 1990-12-06 1992-06-17 Shell Int Research Aqueous polysaccharide compositions and their use
WO1997026311A1 (fr) * 1996-01-16 1997-07-24 Great Lakes Chemical Corporation Compositions aqueuses tres denses et rendues visqueuses
US5728652A (en) * 1995-02-10 1998-03-17 Texas United Chemical Company, Llc. Brine fluids having improved rheological charactersitics

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2250761A (en) * 1990-12-06 1992-06-17 Shell Int Research Aqueous polysaccharide compositions and their use
US5728652A (en) * 1995-02-10 1998-03-17 Texas United Chemical Company, Llc. Brine fluids having improved rheological charactersitics
WO1997026311A1 (fr) * 1996-01-16 1997-07-24 Great Lakes Chemical Corporation Compositions aqueuses tres denses et rendues visqueuses

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7211550B2 (en) 2000-07-14 2007-05-01 Cabot Corporation Compositions for controlling scaling and completion fluids
WO2002064697A3 (fr) * 2001-02-14 2002-11-21 Cabot Specialty Fluids Inc Liquides de forage contenant un formate de metal alcalin
US6818595B2 (en) 2001-02-14 2004-11-16 Cabot Specialty Fluids, Inc. Drilling fluids containing an alkali metal formate
WO2003029612A1 (fr) * 2001-09-28 2003-04-10 Stephen Atkinson Procédé de récupération d'hydrocarbures dans des hydrates
GB2398328A (en) * 2001-09-28 2004-08-18 Stephen Atkinson Method for the recovery of hydrocarbons from hydrates
GB2398328B (en) * 2001-09-28 2005-06-08 Stephen Atkinson Method for the recovery of hydrocarbons from hydrates
CN1304728C (zh) * 2001-09-28 2007-03-14 斯蒂芬·阿特金森 从水合物中回收烃的方法
CN101555784B (zh) * 2009-06-01 2013-04-17 李向东 一种洁净的天然气开采方法
US10577300B2 (en) 2018-06-12 2020-03-03 Saudi Arabian Oil Company Synthesis of sodium formate and drilling fluid comprising the same
US10919833B2 (en) 2018-06-12 2021-02-16 Saudi Arabian Oil Company Synthesis of sodium formate and drilling fluid comprising the same
CN110484220A (zh) * 2019-08-02 2019-11-22 中国石油集团川庆钻探工程有限公司长庆钻井总公司 一种提高大丛井大斜度井滑动效率的钻井液及施工方法

Also Published As

Publication number Publication date
SE514022C2 (sv) 2000-12-11
SE9800958D0 (sv) 1998-03-23
AU2965899A (en) 1999-10-18
SE9800958L (sv) 1999-09-24

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