WO2006085772A1 - Method for the optimalization of the supply of chemicals - Google Patents
Method for the optimalization of the supply of chemicals Download PDFInfo
- Publication number
- WO2006085772A1 WO2006085772A1 PCT/NO2006/000052 NO2006000052W WO2006085772A1 WO 2006085772 A1 WO2006085772 A1 WO 2006085772A1 NO 2006000052 W NO2006000052 W NO 2006000052W WO 2006085772 A1 WO2006085772 A1 WO 2006085772A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- chemicals
- oil
- water
- emulsion
- fluid
- Prior art date
Links
Classifications
-
- 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—Oils, i.e. hydrocarbon liquids specific substances contained in the oil or fuel
- G01N33/2847—Water in oil
-
- 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
- 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
- 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.
- Such 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. Such practice is imprecise and often leads to the overdosing of auxiliary chemicals, chemicals that are often characterised as environmentally harmful.
- 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, and
- 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.
- 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. 2 shows a diagrammatic example of a gas/oil/water separator in which the content of the separator may be, from top to bottom, gas, foam, oil, emulsion (of water and oil) and water.
- the content of the separator may be, from top to bottom, gas, foam, oil, emulsion (of water and oil) and water.
- To the right of the separator is a corresponding diagram illustrating the relation between height and density for the various layers.
- 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: - minimising the thickness of the foam and emulsion layers, i.e. maximising the possible separation in the separator on the basis of the addition of chemicals, and - meeting maximum requirements for the thickness of the foam and emulsion layers in the separator, i.e. minimising the use of chemicals on the basis of the separation ability of the separation system.
- 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 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.
Abstract
Description
Claims
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CA002597276A CA2597276A1 (en) | 2005-02-09 | 2006-02-08 | Method for the optimalization of the supply of chemicals |
MX2007008144A MX2007008144A (en) | 2005-02-09 | 2006-02-08 | Method for the optimalization of the supply of chemicals. |
BRPI0607931-8A BRPI0607931A2 (en) | 2005-02-09 | 2006-02-08 | method for optimizing the use of chemicals |
US11/884,018 US20080142414A1 (en) | 2005-02-09 | 2006-02-08 | Method For the Optimalization of the Supply of Chemicals |
GB0715826A GB2437683B (en) | 2005-02-09 | 2006-02-08 | Method for the optimalization of the supply of chemicals |
AU2006213126A AU2006213126B2 (en) | 2005-02-09 | 2006-02-08 | Method for the optimalization of the supply of chemicals |
NO20073212A NO20073212L (en) | 2005-02-09 | 2007-06-22 | "Method for optimizing the use of chemicals" |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NO20050680 | 2005-02-09 | ||
NO20050680A NO20050680D0 (en) | 2005-02-09 | 2005-02-09 | Method for optimizing the use of chemicals |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2006085772A1 true WO2006085772A1 (en) | 2006-08-17 |
Family
ID=35229568
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/NO2006/000052 WO2006085772A1 (en) | 2005-02-09 | 2006-02-08 | Method for the optimalization of the supply of chemicals |
Country Status (9)
Country | Link |
---|---|
US (1) | US20080142414A1 (en) |
AU (1) | AU2006213126B2 (en) |
BR (1) | BRPI0607931A2 (en) |
CA (1) | CA2597276A1 (en) |
GB (1) | GB2437683B (en) |
MX (1) | MX2007008144A (en) |
NO (1) | NO20050680D0 (en) |
RU (1) | RU2417310C2 (en) |
WO (1) | WO2006085772A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2995538A1 (en) * | 2012-09-18 | 2014-03-21 | Wintech Global | MULTIPHASIC FLUID TREATMENT PLANT AND METHOD FOR ONLINE CHARACTERIZATION OF SAID FLUID |
Families Citing this family (4)
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 |
RU2632744C2 (en) * | 2015-12-15 | 2017-10-09 | Владимир Иванович Шаталов | Method of optimizing deemulgator dosage |
WO2019094454A1 (en) | 2017-11-10 | 2019-05-16 | Ecolab Usa Inc. | Use of siloxane polymers for vapor pressure reduction of processed crude oil |
US11331600B2 (en) | 2019-05-09 | 2022-05-17 | Saudi Arabian Oil Company | Managing foam in gas processing systems |
Citations (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
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 |
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 |
DE4208598A1 (en) * | 1991-03-30 | 1992-10-01 | Volkswagen Ag | Automatic addn. of antifoaming agent - used to prevent excessive foaming of machine tool lubricating emulsion in filter system tank |
US5375459A (en) * | 1993-12-13 | 1994-12-27 | Henkel Corporation | Defoamer testing apparatus |
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 |
US6057375A (en) * | 1995-02-01 | 2000-05-02 | Henkel Kommanditgesellschaft Auf Aktien | Use of alkoxylation products of epoxidized fats as antifoaming agents |
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 |
US20030051602A1 (en) * | 1999-10-29 | 2003-03-20 | Baker Hughes Incorporated | Gas carry-under monitoring and 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 |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4581134A (en) * | 1984-09-28 | 1986-04-08 | Texaco Inc. | Crude oil dehydrator/desalter control system |
GB9822301D0 (en) * | 1998-10-14 | 1998-12-09 | Ici Plc | Level measurement systems |
JP2002069460A (en) * | 2000-08-25 | 2002-03-08 | Yokogawa Electric Corp | System for controlling desalting vessel |
-
2005
- 2005-02-09 NO NO20050680A patent/NO20050680D0/en unknown
-
2006
- 2006-02-08 GB GB0715826A patent/GB2437683B/en active Active
- 2006-02-08 US US11/884,018 patent/US20080142414A1/en not_active Abandoned
- 2006-02-08 RU RU2007133504/03A patent/RU2417310C2/en not_active IP Right Cessation
- 2006-02-08 MX MX2007008144A patent/MX2007008144A/en active IP Right Grant
- 2006-02-08 BR BRPI0607931-8A patent/BRPI0607931A2/en not_active IP Right Cessation
- 2006-02-08 WO PCT/NO2006/000052 patent/WO2006085772A1/en active Application Filing
- 2006-02-08 AU AU2006213126A patent/AU2006213126B2/en not_active Ceased
- 2006-02-08 CA CA002597276A patent/CA2597276A1/en not_active Abandoned
Patent Citations (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
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 |
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 |
DE4208598A1 (en) * | 1991-03-30 | 1992-10-01 | Volkswagen Ag | Automatic addn. of antifoaming agent - used to prevent excessive foaming of machine tool lubricating emulsion in filter system tank |
US5375459A (en) * | 1993-12-13 | 1994-12-27 | Henkel Corporation | Defoamer testing apparatus |
US6057375A (en) * | 1995-02-01 | 2000-05-02 | Henkel Kommanditgesellschaft Auf Aktien | Use of alkoxylation products of epoxidized fats as antifoaming agents |
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 |
US20030051602A1 (en) * | 1999-10-29 | 2003-03-20 | Baker Hughes Incorporated | Gas carry-under monitoring and 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 (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2995538A1 (en) * | 2012-09-18 | 2014-03-21 | Wintech Global | MULTIPHASIC FLUID TREATMENT PLANT AND METHOD FOR ONLINE CHARACTERIZATION OF SAID FLUID |
WO2014044973A1 (en) * | 2012-09-18 | 2014-03-27 | Wintech Global | Facility for processing a multiphase fluid and method for characterizing said fluid online |
US9945833B2 (en) | 2012-09-18 | 2018-04-17 | Wintech Global | Facility for processing a multiphase fluid and method for characterizing said fluid online |
Also Published As
Publication number | Publication date |
---|---|
RU2007133504A (en) | 2009-03-20 |
NO20050680D0 (en) | 2005-02-09 |
AU2006213126A1 (en) | 2006-08-17 |
GB0715826D0 (en) | 2007-09-26 |
RU2417310C2 (en) | 2011-04-27 |
US20080142414A1 (en) | 2008-06-19 |
BRPI0607931A2 (en) | 2010-10-19 |
MX2007008144A (en) | 2007-08-22 |
AU2006213126B2 (en) | 2010-11-18 |
GB2437683A (en) | 2007-10-31 |
GB2437683B (en) | 2010-12-08 |
CA2597276A1 (en) | 2006-08-17 |
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