CN1220841C - Ordinary-temp. crude gathering method - Google Patents
Ordinary-temp. crude gathering method Download PDFInfo
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- CN1220841C CN1220841C CN 02109485 CN02109485A CN1220841C CN 1220841 C CN1220841 C CN 1220841C CN 02109485 CN02109485 CN 02109485 CN 02109485 A CN02109485 A CN 02109485A CN 1220841 C CN1220841 C CN 1220841C
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- improving agent
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- flow improving
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Abstract
The present invention relates to a normal temperature crude oil gathering method which belongs to the improvement of an oil field crude oil gathering method. Flow improver is added to produced liquid at first, wherein the flow improver is composed of polyether epoxy ethane and epoxy propane embedded copolymer; epoxy ethane and epoxy propane respectively account for 30 to 70% of the flow improver; the addition quantity of the flow improver is just relevant to the crude oil gathering quantity without regard to the water gathering quantity; the concentration of the added flow improver is 10 to 200% of that of the crude oil; when the water content is larger than 35 to 40%, the produced liquid forms oil-in-water type false emulsion which can easily generate oil-water separation by self weight when being still. The produced liquid can realize gathering without being heated; pipe walls of pipelines are not glued, and the flow resistance is small; after reaching a combined station, the produced liquid can realize the oil-water separation by natural gravity without adding a demulsifying agent. Compared with a gathering method by heating the produced liquid, the present invention can averagely save energy sources, such as oil, gas, electricity, etc., by 30 to 80%, and has the advantages of demulsifying agent saving, construction step reduction and gathering expense decrease.
Description
Technical field: the present invention relates to the improvement of crude oil collecting and transporting method.
Background technique: at present the defeated temperature of the collection of oil field oil-gas-water mixture will be higher than the temperature spots of separating out of the setting temperature point of crude oil or its content of wax usually, so that make the collection of mixture fail that liquid is in flowing state in the process.But when the crude oil of the defeated high-solidification point of collection or the crude oil of high wax precipitation temperature, just must make it keep higher temperature the mixture heating, do not solidify and do not analyse the problem of wax though solved crude oil like this, consumed a large amount of energy, the shortcoming that causes the defeated cost of collection to increase.
Summary of the invention: the purpose of this invention is to provide a kind of crude oil normal temperature collecting and transporting method, the method is under the high condition of the solidifying point that is lower than crude oil or viscosity, will the blends of crudes heating just its collection can not failed, reduced crude oil defeated integrated.The present invention is that in the following order several steps carries out: 1, at first add flow improving agent in extraction liquid, wherein flow improving agent is polyethers ethylene oxide and propylene oxide embedding shape copolymer, wherein ethylene oxide accounts for the 30%-70% of this flow improving agent, and propylene oxide accounts for the 30%-70% of this flow improving agent.It is relevant with the character of underground crude oil that flow improving agent accounts for the ratio of extraction liquid, calculates by the pure former oil mass that collection is defeated, and the weight concentration that adds flow improving agent is 10/1000000ths to 200/1000000ths of a crude oil.The ratio of this flow improving agent and water can be an arbitrary value, make extraction liquid form the oil-in-water type pseudo-emulsion under greater than 40% situation moisture, so that the sticking tube wall of carrying the mixed solution pipeline of the oil in this pseudo-emulsion, flow resistance is low, and when static by being easy to generate oil-water separation from Beijing South Maxpower Technology Co. Ltd; 2, secondly extraction liquid is not heated, and is being lower than under the setting temperature point of crude oil, contains the profit pseudo-emulsion of flow improving agent to metering room from the production wellhead collection is defeated; 3, again the profit pseudo-emulsion that contains flow improving agent is transported to terminal from metering room, arrives multi-purpose station again; 4, at last in the multi-purpose station dehydration, under the natural gravity effect, need not add demulsifier through 15 minutes to 3 hours, profit is with regard to each self-separation output.The present invention compared with prior art has the following advantages: just can realize that under the situation that extraction liquid is not heated collection is defeated, and not glue the tube wall of transfer line, flow resistance is also little, need not add demulsifier behind the multi-purpose station to lean on natural gravity just can realize oil-water separation.It and the extraction liquid of heating collect defeated method ratio and can on average save oil, gas, electric equal energy source 30% to 80%; Save demulsifier, reduce construction sequence; Reduce the defeated expense of collection, improved the economic benefit of gathering and transportation technology greatly.
Description of drawings: Fig. 1 is the schematic diagram of collecting and transporting method of the present invention.
Embodiment one: from the water mixing pipeline of metering room by the concentration of 10 to 100 mg/litre, 50 mg/litre preferably, quantitatively the wellhead flowline to the A oil well adds flow improving agent.Wherein ethylene oxide accounts for 40%, and propylene oxide accounts for 60%.The daily fluid production rate of A oil well is 82 tons, and is moisture 79.6%, 16.73 tons of day produce oils, 0.855 ton/m3 of crude oil ground severe, 29 ℃ of former oil freezing points, 38 ℃ of crude oil wax precipitation temperature points.Therefore the flow improving agent amount of mixing every day to the A oil well is:
16.73 0.855 ton/m of ton per day ÷
3* 1000 liters/m
3* (10 to 100) mg/litre ÷ 10
6Milligram/kilogram=0.196 is to 1.96 kilograms (preferably 0.98 kilograms)
Add that the water mixing temperature of A well is 33 ℃ behind the flow improving agent; The well head returning-oil temperature is 25 ℃, and return pressure is 0.79MPa; The temperature of metering room is 23 ℃, is lower than the solidifying point of crude oil; Behind metering room, the liquid of A well mixes with the liquid that enters other 11 mouthfuls of wells of metering room and is transported to petroleum transferring station, is 31 ℃ by metering room to the delivery temperature of petroleum transferring station, is lower than the wax precipitation temperature point of crude oil, discharge pressure 0.39MPa; At petroleum transferring station, mix with the liquid of other 7 metering rooms that enter petroleum transferring station and be transported to multi-purpose station with centrifugal pump, be 33 ℃ by petroleum transferring station to the delivery temperature of multi-purpose station, be lower than the wax precipitation temperature point of crude oil, discharge pressure 0.36MPa; Do not add any demulsifier behind the multi-purpose station and carry out the profit gravity separation, the Water in oil 8.3% after the separation, oil-containing 151 mg/litre in the water.The ton oil consumption rock gas 6.3m of this mouthful well overall process after adding flow improving agent
3, oil ratio per ton does not add flow improving agent and saves rock gas 6.5m
3The pumping unit of A well quit work 2 hours 30 minutes because of power failure, and after restarting, the well head return pressure rises to 1.53MPa by 0.82MPa, after 3 hours pressure drop to 0.83MPa.
Embodiment two: from the water mixing pipeline of metering room by the concentration of 100 to 200 mg/litre, 150 mg/litre preferably, quantitatively the wellhead flowline to the B oil well adds flow improving agent.Wherein ethylene oxide accounts for 45%, and propylene oxide accounts for 55%.The daily fluid production rate of B oil well is 68 tons, and is moisture 82.0%, 12.24 tons of day produce oils, 0.855 ton/m of crude oil ground severe
3, 28 ℃ of former oil freezing points, 37 ℃ of the wax precipitation temperature points of crude oil.Therefore the flow improving agent amount of mixing to B oil well every day is:
12.24 0.855 ton/m of ton per day ÷
3* 1000 liters/m
3* (100 to 200) mg/litre ÷ 10
6Milligram/kilogram=1.43 are to 2.86 kilograms (preferably 2.15 kilograms)
Add that the water mixing temperature of B well is 34 ℃ behind the flow improving agent; The well head returning-oil temperature is 26 ℃, and return pressure is 0.65MPa; The temperature of metering room is 26 ℃, is lower than the solidifying point of crude oil; Behind metering room, the liquid of B well mixes with the liquid that enters other 15 mouthfuls of wells of metering room and is transported to petroleum transferring station, is 32.5 ℃ by metering room to the delivery temperature of petroleum transferring station, is lower than the wax precipitation temperature point of crude oil, discharge pressure 0.34MPa; At petroleum transferring station, mix with the liquid of other 8 metering rooms that enter petroleum transferring station and be transported to multi-purpose station with centrifugal pump, be 34 ℃ by petroleum transferring station to the delivery temperature of multi-purpose station, be lower than the wax precipitation temperature point of crude oil, discharge pressure 0.35MPa; Do not add any demulsifier behind the multi-purpose station and carry out the profit gravity separation, the Water in oil 6.1% after the separation, oil-containing 139 mg/litre in the water.The ton oil consumption rock gas 7.1m of this mouthful well overall process after adding flow improving agent
3, oil ratio per ton does not add flow improving agent and saves rock gas 9.4m
3The pumping unit of B well quit work 3 hours because of power failure, and after restarting, the well head return pressure rises to 1.61MPa by 0.70MPa, and pressure drops to 0.69MPa after 2 hours 45 minutes.
Claims (2)
1, crude oil normal temperature collecting and transporting method, it is characterized in that at first in extraction liquid, adding flow improving agent, wherein flow improving agent is polyethers ethylene oxide and propylene oxide embedding shape copolymer, wherein ethylene oxide accounts for the 30%-70% of this flow improving agent, propylene oxide accounts for the 30%-70% of this flow improving agent, the weight concentration that adds flow improving agent is 10/1000000ths to 200/1000000ths of a crude oil, the ratio of this flow improving agent and water can be an arbitrary value, make extraction liquid form the oil-in-water type pseudo-emulsion under greater than 40% situation moisture, when static by being easy to generate oil-water separation from Beijing South Maxpower Technology Co. Ltd.
2, crude oil normal temperature collecting and transporting method according to claim 1 is characterized in that extraction liquid do not heat, and is being lower than under the setting temperature point of crude oil, contains the profit pseudo-emulsion of flow improving agent to metering room from the production wellhead collection is defeated; Again the profit pseudo-emulsion that contains flow improving agent is transported to terminal from metering room, arrives multi-purpose station again; In the multi-purpose station dehydration, under the natural gravity effect, need not add demulsifier through 15 minutes to 3 hours at last, profit is with regard to each self-separation output.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02109485 CN1220841C (en) | 2002-04-13 | 2002-04-13 | Ordinary-temp. crude gathering method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02109485 CN1220841C (en) | 2002-04-13 | 2002-04-13 | Ordinary-temp. crude gathering method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1451903A CN1451903A (en) | 2003-10-29 |
| CN1220841C true CN1220841C (en) | 2005-09-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02109485 Expired - Lifetime CN1220841C (en) | 2002-04-13 | 2002-04-13 | Ordinary-temp. crude gathering method |
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| CN (1) | CN1220841C (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104534279B (en) * | 2014-12-22 | 2015-12-30 | 山东东明石化集团有限公司 | A kind of method of long-distance pipe normal temperature conveying 380# fuel oil |
| CN106764429A (en) * | 2016-12-27 | 2017-05-31 | 鲍云波 | The continuous closed gathering system of individual well branch line ring-type ground crude oil and the continuous closed gathering method of crude oil |
| CN107939346A (en) * | 2017-12-20 | 2018-04-20 | 申娟 | One kind is based on the defeated integrated technique of technology of Internet of things heavy oil production collection |
| CN109762537A (en) * | 2019-02-27 | 2019-05-17 | 郑州智锦电子科技有限公司 | A kind of preparation method of environment universality Multi-effect oilfield additive |
| CN114992520B (en) * | 2022-05-31 | 2024-01-30 | 深圳市佳运通电子有限公司 | Control method of water-doped heat tracing system of oil transfer station in unattended mode |
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2002
- 2002-04-13 CN CN 02109485 patent/CN1220841C/en not_active Expired - Lifetime
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| CN1451903A (en) | 2003-10-29 |
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Granted publication date: 20050928 |