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US20080142414A1 - Method For the Optimalization of the Supply of Chemicals - Google Patents

Method For the Optimalization of the Supply of Chemicals Download PDF

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Publication number
US20080142414A1
US20080142414A1 US11/884,018 US88401806A US2008142414A1 US 20080142414 A1 US20080142414 A1 US 20080142414A1 US 88401806 A US88401806 A US 88401806A US 2008142414 A1 US2008142414 A1 US 2008142414A1
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US
United States
Prior art keywords
water
oil
separated
separator
chemicals
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
Application number
US11/884,018
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English (en)
Inventor
Per Eivind Gramme
Gunnar Hannibal Lie
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Norsk Hydro ASA
Equinor Energy AS
Original Assignee
Individual
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 Individual filed Critical Individual
Assigned to NORSK HYDRO ASA reassignment NORSK HYDRO ASA ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: GRAMME, PER EIVIND, LIE, GUNNAR HANNIBAL
Publication of US20080142414A1 publication Critical patent/US20080142414A1/en
Assigned to STATOILHYDRO ASA reassignment STATOILHYDRO ASA CHANGE OF NAME (SEE DOCUMENT FOR DETAILS). Assignors: STATOIL ASA
Assigned to STATOIL ASA reassignment STATOIL ASA CHANGE OF NAME (SEE DOCUMENT FOR DETAILS). Assignors: STATOILHYDRO ASA
Assigned to STATOIL PETROLEUM AS reassignment STATOIL PETROLEUM AS ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: STATOIL ASA
Abandoned legal-status Critical Current

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/26—Oils; Viscous liquids; Paints; Inks
    • G01N33/28—Oils, i.e. hydrocarbon liquids
    • G01N33/2835—Specific substances contained in the oils or fuels
    • G01N33/2847—Water in oils
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D17/00—Separation of liquids, not provided for elsewhere, e.g. by thermal diffusion
    • B01D17/02—Separation of non-miscible liquids
    • B01D17/04—Breaking emulsions
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D17/00—Separation of liquids, not provided for elsewhere, e.g. by thermal diffusion
    • B01D17/02—Separation of non-miscible liquids
    • B01D17/0208—Separation of non-miscible liquids by sedimentation
    • B01D17/0214—Separation of non-miscible liquids by sedimentation with removal of one of the phases
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D19/00—Degasification of liquids
    • B01D19/0063—Regulation, control including valves and floats
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D19/00—Degasification of liquids
    • B01D19/02—Foam dispersion or prevention
    • B01D19/04—Foam dispersion or prevention by addition of chemical substances
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
    • C10G33/00—Dewatering or demulsification of hydrocarbon oils
    • C10G33/04—Dewatering or demulsification of hydrocarbon oils with chemical means
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/26—Oils; Viscous liquids; Paints; Inks
    • G01N33/28—Oils, i.e. hydrocarbon liquids

Definitions

  • the present invention concerns a method for optimising the use of chemicals, in particular the use of antifoaming agents and emulsion breakers, in oil processing plants on the seabed, onshore or offshore.
  • Auxiliary chemicals such as antifoaming agents and emulsion breakers must virtually always be used in the processing of oil, where the separation of gas, oil and water is a main operation.
  • auxiliary chemicals are dosed manually today by the pumps being adjusted up and down on the basis of rates through the plant and the degree of foaming and separation problems in the process, assessed visually and subjectively on the basis of the operating situation in the plant.
  • the common method of adding auxiliary chemicals is to adjust the dosage when problems are discovered. Days often pass between adjustments. Psychologically, it is easier to increase the dosage when problems are experienced than to reduce it. As finding the optimal point entails both reducing and increasing the dosage by trial and error, this is an operation that is very difficult to carry out.
  • a chemicals company is therefore often called in and, for example, this company finds a new chemical.
  • the present invention represents a method for dosing chemicals that produces precise addition of chemicals and thus reduces the costs of such chemicals and spares the environment from unnecessary and harmful discharges.
  • the present invention is characterised in that the chemicals are dosed on the basis of the effect they have on the thickness of the foam layer and the emulsion layer, respectively, of the fluid, as defined in the attached claim 1 .
  • FIG. 1 shows a diagram that illustrates a typical dosage/effect relation.
  • FIG. 2 shows a diagram of a separator tank with an associated diagram that illustrates the composition of the various layers in the tank
  • FIG. 3 shows a diagram of the method in accordance with the present invention
  • FIG. 4 shows an alternative embodiment of the solution shown in FIG. 3 .
  • FIG. 5 shows a typical dosage curve for the method in accordance with the present invention.
  • Meters that are based on multilevel gamma radiation (sources and detectors). Meters that are based on multilevel capacitance measurement. Meters that are based on multilevel induction measurement.
  • water-cut meters i.e. meters that measure the quantity of water in oil in an oil/water fluid flow, are becoming part of the standard instrumentation of separators.
  • the principal idea of the present invention is to control the dosage of chemicals, in particular antifoaming agents and emulsion breakers, on the basis of the effect they have on the thickness of the foam layer and emulsion layer, respectively, in the separator.
  • the effect of the chemicals is generally dependent on the dosage. Most chemicals have an “optimal” dosage that produces the greatest effect at an optimisation point as shown in FIG. 1 .
  • the vertical axis in FIG. 1 shows the effectiveness of a chemical, while the horizontal axis shows the dosage. As the figure shows, both overdosing and underdosing will produce a reduced effect. It is therefore important to dose correctly at all times.
  • FIG. 3 shows a diagram of the method on which the present invention is based.
  • Gas/oil/water are supplied to a separator tank 1 from a well or similar (not shown) via a supply line 2 .
  • Various layers of gas, foam, oil, emulsion and water are formed in the tank.
  • a measuring device 3 registers the state of the various layers and emits a signal to a control device 4 , which, in turn, controls pumps 5 and 6 .
  • These pumps pump the necessary quantity of chemical (antifoaming agent or emulsion breaker) from the reservoirs 7 , 8 to the supply line 2 via lines 9 , 10 on the basis of the signals from the control device 4 .
  • control criteria for the method in accordance with the present invention may, for example, on the basis of what is shown in FIG. 3 , involve:
  • the method requires measurement, using the measuring device 3 , of the density profile over the height of the separator, showing the thickness of the foam and emulsion layers.
  • FIG. 4 shows an alternative solution in which a water-cut meter 11 is arranged on the outlet line 14 to measure the water quantity in the separated oil phase and an oil-in-water meter 12 is arranged on the outlet line 15 to measure the oil concentration in the separated water phase flowing from the separator 1 .
  • These measurements may, to good advantage, be entered in adjustment algorithms in the control device 4 to improve the precision of the control method.
  • the chemical interface (gas/liquid and oil/water interfaces) is a result of all surfactants in the oil and water phases.
  • Auxiliary chemicals such as shell inhibitors, hydrate inhibitors, wax inhibitors and corrosion inhibitors are all more or less surfactive, and changes in their dosages affect the chemical composition of the gas/liquid and oil/water interfaces.
  • the chemical composition will also be affected by the water-cut and the gas/liquid ratio in the process flow (since the interface concentration is the quantity of surfactant divided by the interface area in the system).
  • Other major parameters that affect the interface chemistry are system pressure, system temperature and well composition (since the oil composition may vary in the reservoir).
  • the interface area consists of the gas/liquid and oil/water interface areas, i.e. the total of the drop and bubble surfaces, respectively.
  • the interface area for the foam phase is also determined by the flow rate, the gas/liquid ratio and the bubble size distribution.
  • the interface area for the emulsion phase is also determined by the flow rate, the water-cut and the drop size distribution.
  • the proposed dosing method will continuously optimise the overall effect of all the parameters and the properties as stated above, and the method in accordance with the present invention will, therefore, ensure perfect dosing at all times.
  • the saving on chemicals when using the method in accordance with the present invention may be significant, as suggested in FIG. 5 , in which the diagram shows dosing in a separation process for oil/water over a period of time.
  • the dotted line shows the addition of chemicals using the manual adjustment method commonly used at present, while the unbroken line shows dosing for the corresponding process using the method in accordance with the present invention.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Health & Medical Sciences (AREA)
  • Physics & Mathematics (AREA)
  • General Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Pathology (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • Food Science & Technology (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Medicinal Chemistry (AREA)
  • Organic Chemistry (AREA)
  • Thermal Sciences (AREA)
  • Toxicology (AREA)
  • Dispersion Chemistry (AREA)
  • Degasification And Air Bubble Elimination (AREA)
  • Investigating Or Analyzing Non-Biological Materials By The Use Of Chemical Means (AREA)
  • Feeding, Discharge, Calcimining, Fusing, And Gas-Generation Devices (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)
US11/884,018 2005-02-09 2006-02-08 Method For the Optimalization of the Supply of Chemicals Abandoned US20080142414A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
NO20050680A NO20050680D0 (no) 2005-02-09 2005-02-09 Metode for a optimalisere bruk av kjemikalier
NO20050680 2005-02-09
PCT/NO2006/000052 WO2006085772A1 (en) 2005-02-09 2006-02-08 Method for the optimalization of the supply of chemicals

Publications (1)

Publication Number Publication Date
US20080142414A1 true US20080142414A1 (en) 2008-06-19

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Family Applications (1)

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US11/884,018 Abandoned US20080142414A1 (en) 2005-02-09 2006-02-08 Method For the Optimalization of the Supply of Chemicals

Country Status (9)

Country Link
US (1) US20080142414A1 (es)
AU (1) AU2006213126B2 (es)
BR (1) BRPI0607931A2 (es)
CA (1) CA2597276A1 (es)
GB (1) GB2437683B (es)
MX (1) MX2007008144A (es)
NO (1) NO20050680D0 (es)
RU (1) RU2417310C2 (es)
WO (1) WO2006085772A1 (es)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10030498B2 (en) * 2014-12-23 2018-07-24 Fccl Partnership Method and system for adjusting the position of an oil-water interface layer
WO2020227494A1 (en) * 2019-05-09 2020-11-12 Saudi Arabian Oil Company Managing foam in gas processing systems
US11091710B2 (en) 2017-11-10 2021-08-17 Championx Usa Inc. Use of siloxane polymers for vapor pressure reduction of processed crude oil
US20240226773A1 (en) * 2023-01-06 2024-07-11 Saudi Arabian Oil Company Smart dehysalter system

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2995538B1 (fr) * 2012-09-18 2015-04-10 Wintech Global Installation de traitement d'un fluide multiphasique et procede de caracterisation en ligne dudit fluide
RU2632744C2 (ru) * 2015-12-15 2017-10-09 Владимир Иванович Шаталов Способ оптимизации дозирования деэмульгатора

Citations (4)

* Cited by examiner, † Cited by third party
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US4581134A (en) * 1984-09-28 1986-04-08 Texaco Inc. Crude oil dehydrator/desalter control system
US20020033356A1 (en) * 2000-08-25 2002-03-21 Tatsuho Honda Desalter control system
US6633625B2 (en) * 1998-10-14 2003-10-14 Johnson Matthey Plc Density profiler for measuring density profile of a medium and method and apparatus using same
US20050018176A1 (en) * 2003-07-25 2005-01-27 Baker Hughes Incorporated Real-time on-line sensing and control of emulsions in formation fluids

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US3796318A (en) * 1972-08-31 1974-03-12 Sun Oil Co Automatic emulsion control
US3856677A (en) * 1972-12-18 1974-12-24 Exxon Production Research Co Proportional chemical injection system
SU838274A1 (ru) * 1979-06-27 1981-06-15 Мурманское Высшее Инженерное Морскоеучилище Имени Ленинского Комсомола Способ транспортировки и хранени жидКОгО ТОплиВА
US4737265A (en) * 1983-12-06 1988-04-12 Exxon Research & Engineering Co. Water based demulsifier formulation and process for its use in dewatering and desalting crude hydrocarbon oils
SU1287910A1 (ru) * 1985-04-01 1987-02-07 Уфимский Филиал Всесоюзного Научно-Исследовательского И Проектно-Конструкторского Института Нефтяного Машиностроения Скребковый вал трубчатого кристаллизатора
GB2177739B (en) * 1985-07-15 1988-06-29 Texaco Ltd Offshore hydrocarbon production system
DE4208598A1 (de) * 1991-03-30 1992-10-01 Volkswagen Ag Einrichtung zur verhinderung des ueberschaeumens eines bades
US5375459A (en) * 1993-12-13 1994-12-27 Henkel Corporation Defoamer testing apparatus
DE19503062A1 (de) * 1995-02-01 1996-08-08 Henkel Kgaa Verwendung von Alkoxylierungsprodukten epoxydierter Fettstoffe als Entschäumer
US5734098A (en) * 1996-03-25 1998-03-31 Nalco/Exxon Energy Chemicals, L.P. Method to monitor and control chemical treatment of petroleum, petrochemical and processes with on-line quartz crystal microbalance sensors
US6121602A (en) * 1998-06-18 2000-09-19 Nalco/Exxon Energy Chemicals, L.P. Method for monitoring foam and gas carry under and for controlling the addition of foam inhibiting chemicals
EP1044711A1 (en) * 1999-04-12 2000-10-18 Shell Internationale Researchmaatschappij B.V. Device for separating a mixture of fluids
RU2186035C2 (ru) * 1999-09-23 2002-07-27 Белоус Валерий Константинович Способ биологической очистки морской среды
US6461414B1 (en) * 1999-10-29 2002-10-08 Baker Hughes Incorporated Foam monitoring and control system
EA003315B1 (ru) * 1999-12-14 2003-04-24 Шелл Интернэшнл Рисерч Маатсхаппий Б.В. Система для добычи обезвоженной нефти из подземного месторождения
WO2002016783A1 (en) * 2000-08-23 2002-02-28 Osipenko Sergey Borisovich Device for effecting a flow of liquid medium

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4581134A (en) * 1984-09-28 1986-04-08 Texaco Inc. Crude oil dehydrator/desalter control system
US6633625B2 (en) * 1998-10-14 2003-10-14 Johnson Matthey Plc Density profiler for measuring density profile of a medium and method and apparatus using same
US20020033356A1 (en) * 2000-08-25 2002-03-21 Tatsuho Honda Desalter control system
US20050018176A1 (en) * 2003-07-25 2005-01-27 Baker Hughes Incorporated Real-time on-line sensing and control of emulsions in formation fluids

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10030498B2 (en) * 2014-12-23 2018-07-24 Fccl Partnership Method and system for adjusting the position of an oil-water interface layer
US11091710B2 (en) 2017-11-10 2021-08-17 Championx Usa Inc. Use of siloxane polymers for vapor pressure reduction of processed crude oil
WO2020227494A1 (en) * 2019-05-09 2020-11-12 Saudi Arabian Oil Company Managing foam in gas processing systems
US11331600B2 (en) 2019-05-09 2022-05-17 Saudi Arabian Oil Company Managing foam in gas processing systems
US20240226773A1 (en) * 2023-01-06 2024-07-11 Saudi Arabian Oil Company Smart dehysalter system
US12226711B2 (en) * 2023-01-06 2025-02-18 Saudi Arabian Oil Company Smart dehysalter system

Also Published As

Publication number Publication date
GB2437683A (en) 2007-10-31
GB2437683B (en) 2010-12-08
RU2007133504A (ru) 2009-03-20
BRPI0607931A2 (pt) 2010-10-19
CA2597276A1 (en) 2006-08-17
AU2006213126B2 (en) 2010-11-18
NO20050680D0 (no) 2005-02-09
MX2007008144A (es) 2007-08-22
GB0715826D0 (en) 2007-09-26
AU2006213126A1 (en) 2006-08-17
WO2006085772A1 (en) 2006-08-17
RU2417310C2 (ru) 2011-04-27

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