CN103048236A - Method for testing static stability of thickened oil suitable for field of mining of thickened oil - Google Patents
Method for testing static stability of thickened oil suitable for field of mining of thickened oil Download PDFInfo
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- CN103048236A CN103048236A CN 201110326196 CN201110326196A CN103048236A CN 103048236 A CN103048236 A CN 103048236A CN 201110326196 CN201110326196 CN 201110326196 CN 201110326196 A CN201110326196 A CN 201110326196A CN 103048236 A CN103048236 A CN 103048236A
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- thickened oil
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Abstract
The invention discloses a method for testing static stability of thickened oil suitable for the field of mining of the thickened oil. The method comprises the steps of: (a) preparing a thickened oil emulsion; (b) putting the emulsion into an experimental container; (c) putting the container in a super constant-temperature water bath to stand; (d) beginning to time, and recording the volumes of separated water at different moments; and (e) identifying the type of the upper emulsion after standing for a period of time, and calculating the diversion ratio according to the separated water quantity at different moments, wherein the smaller the diversion ratio is, the better the static stability of the emulsion is. The static stability of the thickened oil can be rapidly tested by the method; and the method is high in test accuracy and low in test cost, and data support is provided for mining of the thickened oil.
Description
Technical field
The present invention relates to a kind of method of testing that is applicable to the viscous crude static stability in thickened oil recovery field.
Background technology
Powerful in petroleum demand, price of oil going up sky-high, under the background of Conventional Heavy Oil production declining, petroleum industry is just turning to thickened oil recovery at the emphasis in many places, the whole world.The chances are 9～13,000,000,000,000 barrels (1.4～2.1 tcms) for the Global Oil resource,
Conventional Heavy Oil only account for wherein 30%, all the other all are viscous crude, super viscous crude and pitch.Viscous crude and tar sand resource are important energy source in the world, and about 4,000 hundred million tons of present global workable reserve is 2.7 times of 1,500 hundred million tons of Conventional Heavy Oil workable reserve.
Along with Gong the utilization of conventional oil reduces day by day, heavy oil is becoming the next century mankind's important energy source.Through the effort in more than 20 years, global heavy oil industry had than conventional oil speed of development faster, and the annual production of viscous crude, tar sand rises to nearly hundred million tons by 2,000 ten thousand tons, and its importance receives people's concern day by day.The difficulty of heavy crude reservoir exploitation is mainly manifested in two aspects: the viscosity of viscous crude is high on the one hand, and the filtrational resistance of viscous crude in oil reservoir is large, so that viscous crude can not flow into the shaft bottom from oil reservoir; Even on the other hand under reservoir condition, viscous crude can flow into the shaft bottom, but in the process of vertical lifting, because the impact of viscous crude factor such as degassed and radiating and cooling in pit shaft, so that the viscosity of viscous crude further increases, have a strong impact on the normal operation of the mobile and oil well production equipment of resident fluid in pit shaft.
According to the interrelated data statistics, explored heavy oil resource mainly concentrates on the states such as Venezuela, USSR (Union of Soviet Socialist Republics), the U.S. and Canada in the world at present.The Orinoco heavy oil belt of Venezuela northeast is examined geologic reserve and is reached more than 3,000 hundred million tons.Half of U.S.'s heavy oil resource is distributed in Gary Fu Niya, nearly 40,000,000,000 tons of geologic reserve, remaining half be distributed in the continent, middle part.Canadian heavy oil resource mainly is distributed in four major sedimentary mineral reserve such as Athabasca, cold air lake, dimension Pascal and this river of Alberta, nearly 1,500 hundred million tons of geologic reserve.The heavy oil resource of USSR (Union of Soviet Socialist Republics) mainly is distributed in more than 200 hundred million tons of the Ba Sainuofuyue in West Siberia basin, comprises that also there is extremely abundant viscous crude resource in other country of China.Total geologic reserve of these heavy oil resources adds up more than 6,000 hundred million tons, and in the world conventional oil verify 3,600 hundred million tons of geologic reserve, its workable reserve only is 90,000,000,000 tons.
The viscous crude stock number that China has found is also very abundant, and existing more than 20 of the viscous crude field of discovery is distributed in the areas such as the Liaohe River, triumph, Xinjiang, huge port, Jilin, estimates that Chinese heavy petroleum asphalt stock number can reach more than 300 * 108t.China's viscous crude (highly viscous oil, viscosity is more than 0.1Pas) resource distribution is very wide, and geologic reserve reaches 164 * 108t, and wherein the land viscous crude accounts for more than 20% of oil total resources.The outstanding characteristics of viscous crude are that bituminous matter, gum level are higher.Colloid, the heavy oil production that asphalt content is higher account for 7% of viscous crude total production.
Connect the area in Daqing oil field, Henan, Inner Mongol two in recent years and found important heavy crude reservoir; Also find the viscous crude resource in areas such as Jianghan Oil-field, little, the Northwest Sichuan of peace.Heavy crude reservoir geologic reserve explored and control has surpassed national common thin oil reserves, estimates also to have from now on new growth.
In the proven reserves of CNPC, common heavy oil accounts for 74.7%, and special viscous crude accounts for 14.4%, and super viscous crude accounts for 10.9%.
Countries in the world mainly rely on traditional thermal methods to the exploitation of high viscosity heavy oil at present, i.e. steam stimulation and steam flood.The supporting technology that China's great majority adopt steam stimulation and pit shaft to mix thin oil is recovered the oil.This method not only consumes a large amount of fuel, but also consumes a large amount of thin oils, thereby has increased widely cost for oil production.Have bibliographical information can use the Emulsifying heavy crude producing, this method is that water phase surfactant mixture is annotated the down-hole, makes full-bodied viscous crude change low viscous water external emulsion extraction into.Reducing viscosity by emulsifying is because its viscosity break ratio is high, low, the easy operating of cost, and at home and abroad all there is use in the oil field at present.But the emulsifying pour depressor that uses at present only possesses single heatproof or anti-rock salt performance, namely heatproof again the emulsifying pour depressor of anti-rock salt research and development also seldom.
In the process of thickened oil recovery early stage, need to measure the various performance parameters of the viscous crude of need exploitation, the static stability of viscous crude particularly, thus provide enough Data supports for the exploitation of viscous crude.
Summary of the invention
The object of the invention is to overcome the shortcoming and defect of above-mentioned prior art, a kind of method of testing that is applicable to the viscous crude static stability in thickened oil recovery field is provided, this method of testing can test out the static stability of viscous crude fast, and measuring accuracy is high, testing cost is low, for the exploitation of viscous crude provides Data support.
Purpose of the present invention is achieved through the following technical solutions: a kind of method of testing that is applicable to the viscous crude static stability in thickened oil recovery field may further comprise the steps:
(a) preparation viscous oil emulsion;
(b) place experiment container;
(c) putting into thermostatic water-circulator bath leaves standstill;
(d) and begin timing, the record different time is separated out the volume of water;
(e) leave standstill a period of time after, differentiate the upper strata emulsion type, the condensate rate according to different time is calculated as follows diversion ratio, diversion ratio is less, then the static stability of emulsion fluid is better;
V in the formula
1---separate out the volume (ml) of water;
V
2---used emulsifying pour depressor aqueous solution volume (ml) during preparation emulsion fluid.
In the described step (a), viscous oil emulsion is viscous crude ow ratio 7: 3, viscosity reducer dosage 0.5%.
In the described step (b), experiment container is tool plug graduated cylinder.
In the described step (c), the temperature of thermostatic water-circulator bath is 50 ℃.
In the described step (e), time of repose is 1～2h.
In sum, the invention has the beneficial effects as follows: can test out fast the static stability of viscous crude, and measuring accuracy is high, testing cost is low, for the exploitation of viscous crude provides Data support.
Embodiment
Below in conjunction with embodiment, the present invention is described in further detail, but embodiments of the present invention are not limited only to this.
Embodiment:
A kind of method of testing that is applicable to the viscous crude static stability in thickened oil recovery field that present embodiment relates to may further comprise the steps:
(a) preparation viscous oil emulsion;
(b) place experiment container;
(c) putting into thermostatic water-circulator bath leaves standstill;
(d) and begin timing, the record different time is separated out the volume of water;
(e) leave standstill a period of time after, differentiate the upper strata emulsion type, the condensate rate according to different time is calculated as follows diversion ratio, diversion ratio is less, then the static stability of emulsion fluid is better;
V in the formula
1---separate out the volume (ml) of water;
V
2---used emulsifying pour depressor aqueous solution volume (ml) during preparation emulsion fluid.
In the described step (a), viscous oil emulsion is viscous crude ow ratio 7: 3, viscosity reducer dosage 0.5%.
In the described step (b), experiment container is tool plug graduated cylinder.
In the described step (c), the temperature of thermostatic water-circulator bath is 50 ℃.
In the described step (e), time of repose is 1～2h.
The above only is preferred embodiment of the present invention, is not the present invention is done any pro forma restriction, and every foundation technical spirit of the present invention, any simple modification, equivalent variations to above embodiment does all fall within protection scope of the present invention.
Claims (5)
1. a method of testing that is applicable to the viscous crude static stability in thickened oil recovery field is characterized in that, may further comprise the steps:
(a) preparation viscous oil emulsion;
(b) place experiment container;
(c) putting into thermostatic water-circulator bath leaves standstill;
(d) and begin timing, the record different time is separated out the volume of water;
(e) leave standstill a period of time after, differentiate the upper strata emulsion type, the condensate rate according to different time is calculated as follows diversion ratio, diversion ratio is less, then the static stability of emulsion fluid is better;
V in the formula
1---separate out the volume (ml) of water;
V
2---used emulsifying pour depressor aqueous solution volume (ml) during preparation emulsion fluid.
2. a kind of method of testing that is applicable to the viscous crude static stability in thickened oil recovery field according to claim 1 is characterized in that, in the described step (a), viscous oil emulsion is viscous crude ow ratio 7: 3, viscosity reducer dosage 0.5%.
3. a kind of method of testing that is applicable to the viscous crude static stability in thickened oil recovery field according to claim 1 is characterized in that, in the described step (b), experiment container is tool plug graduated cylinder.
4. a kind of method of testing that is applicable to the viscous crude static stability in thickened oil recovery field according to claim 1 is characterized in that, in the described step (c), the temperature of thermostatic water-circulator bath is 50 ℃.
5. a kind of method of testing that is applicable to the viscous crude static stability in thickened oil recovery field according to claim 1 is characterized in that, in the described step (e), time of repose is 1～2h.
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| CN 201110326196 CN103048236A (en) | 2011-10-13 | 2011-10-13 | Method for testing static stability of thickened oil suitable for field of mining of thickened oil |
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| CN 201110326196 CN103048236A (en) | 2011-10-13 | 2011-10-13 | Method for testing static stability of thickened oil suitable for field of mining of thickened oil |
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| CN103048236A true CN103048236A (en) | 2013-04-17 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106872353A (en) * | 2017-04-20 | 2017-06-20 | 中国石油大学(北京) | High temperature emulsifies dynamic test set and method of testing |
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2011
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106872353A (en) * | 2017-04-20 | 2017-06-20 | 中国石油大学(北京) | High temperature emulsifies dynamic test set and method of testing |
| CN106872353B (en) * | 2017-04-20 | 2018-08-03 | 中国石油大学(北京) | High temperature emulsifies dynamic test set and test method |
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Application publication date: 20130417 |