CN103048424A - Testing method of influences on stability of thickened oil viscosity reducer by oil-water ratios - Google Patents
Testing method of influences on stability of thickened oil viscosity reducer by oil-water ratios Download PDFInfo
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- CN103048424A CN103048424A CN 201110326184 CN201110326184A CN103048424A CN 103048424 A CN103048424 A CN 103048424A CN 201110326184 CN201110326184 CN 201110326184 CN 201110326184 A CN201110326184 A CN 201110326184A CN 103048424 A CN103048424 A CN 103048424A
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Abstract
The invention discloses a testing method of influences on the stability of a thickened oil viscosity reducer by oil-water ratios. The testing method comprises the following steps: (a) preparing a thickened oil viscosity reducer sample for further use and extracting a thickened oil sample for future use; (b) uniformly mixing the thickened oil sample with distilled water according to different oil-water ratios to prepare a thickened oil viscosity reducer solution; (c) adding the thickened oil viscosity reducer solution into a thickened oil sample; (d) placing the mixture into a constant-temperature water bath for a period of time; and (e) respectively measuring the water distribution rate and the viscosity reduction rate when the oil-water ratios are different, so as to analyze the influences on the stability of the thickened oil viscosity reducer by the oil-water ratios. According to the testing method disclosed by the invention, the influences on the stability of the thickened oil viscosity reducer by the oil-water ratios can be rapidly tested; and the testing precision is high, the testing cost is low, and the testing method provides data support to the utilization of the thickened oil viscosity reducer.
Description
Technical field
The present invention relates to a kind of ow ratio to the method for testing of heavy crude thinner stability influence.
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.
Heavy crude thinner is when being used for the process of reducing thick oil viscosity, and the large young pathbreaker of its ow ratio has influence on the stability in its use procedure, so, before heavy crude thinner uses, should test out ow ratio to the impact of heavy crude thinner stability.
Summary of the invention
The object of the invention is to overcome the shortcoming and defect of above-mentioned prior art, the method of testing of a kind of ow ratio to the heavy crude thinner stability influence is provided, this method of testing can be tested the impact of fuel-displaced water comparison heavy crude thinner stability fast, and measuring accuracy is high, testing cost is low, for the use of heavy crude thinner provides Data support.
Purpose of the present invention is achieved through the following technical solutions: ow ratio may further comprise the steps the method for testing of heavy crude thinner stability influence:
(a) preparation heavy crude thinner sample is for subsequent use, and it is for subsequent use to extract the viscous crude sample;
(b) the heavy crude thinner sample is mixed according to different ow ratios and distilled water, make the reducing thick oil viscosity agent solution;
(c) the reducing thick oil viscosity agent solution is added in the viscous crude sample;
(c) place water bath with thermostatic control a period of time;
Diversion ratio when (d) measuring different ow ratio respectively, viscosity break ratio, thus analyze ow ratio to the impact of heavy crude thinner stability.
In the described step (c), the temperature of water bath with thermostatic control is 60 ℃.
In the described step (b), ow ratio was respectively 8: 2, and 7: 3,6: 4,5: 5.
In sum, the invention has the beneficial effects as follows: can test fast the impact of fuel-displaced water comparison heavy crude thinner stability, and measuring accuracy is high, testing cost is low, for the use of heavy crude thinner 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:
The ow ratio that present embodiment relates to may further comprise the steps the method for testing of heavy crude thinner stability influence:
(a) preparation heavy crude thinner sample is for subsequent use, and it is for subsequent use to extract the viscous crude sample;
(b) the heavy crude thinner sample is mixed according to different ow ratios and distilled water, make the reducing thick oil viscosity agent solution;
(c) the reducing thick oil viscosity agent solution is added in the viscous crude sample;
(c) place water bath with thermostatic control a period of time;
Diversion ratio when (d) measuring different ow ratio respectively, viscosity break ratio, thus analyze ow ratio to the impact of heavy crude thinner stability.
In the described step (c), the temperature of water bath with thermostatic control is 60 ℃.
In the described step (b), ow ratio was respectively 8: 2, and 7: 3,6: 4,5: 5.
As shown in the table by the result that said method records:
As seen from the above table: the variation of ow ratio is remarkable on the impact of stability, along with the reduction of ow ratio, and the emulsion stability rear variation that improves first.Stability is best when ow ratio is 7: 3, and when the profit volume ratio was 5: 5, the oil mixing with water system was w/o type emulsion fluid, the emulsion stability variation.This is because the viscous crude water percentage is when being 50% left and right sides, this moment the viscous oil emulsion phase inversion, namely external phase and disperse phase occur alternately to change in the oil mixing with water system.Phase inversion point (or critical moisture content) is take oil as interior phase (disperse phase) in the past, and water is foreign minister's (external phase), forms O/W (oil-in-water) type emulsion fluid; Along with the further increase of ow ratio, the oil-water two-phase interfaces effect strengthens, and alternate surface energy increases, and phase inversion occurs, and phase inversion forms later on w/o type emulsion fluid, causes the system stability variation.According to the emulsion stability standards of grading, determine that best ow ratio is 7: 3.
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 (3)
1. ow ratio is characterized in that the method for testing of heavy crude thinner stability influence, may further comprise the steps:
(a) preparation heavy crude thinner sample is for subsequent use, and it is for subsequent use to extract the viscous crude sample;
(b) the heavy crude thinner sample is mixed according to different ow ratios and distilled water, make the reducing thick oil viscosity agent solution;
(c) the reducing thick oil viscosity agent solution is added in the viscous crude sample;
(c) place water bath with thermostatic control a period of time;
Diversion ratio when (d) measuring different ow ratio respectively, viscosity break ratio, thus analyze ow ratio to the impact of heavy crude thinner stability.
2. ow ratio according to claim 1 is characterized in that the method for testing of heavy crude thinner stability influence, and in the described step (c), the temperature of water bath with thermostatic control is 60 ℃.
3. ow ratio according to claim 1 is characterized in that the method for testing of heavy crude thinner stability influence, and in the described step (b), ow ratio was respectively 8: 2,7: 3, and 6: 4,5: 5.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104990829A (en) * | 2015-06-15 | 2015-10-21 | 江苏奥莱特新材料有限公司 | Method for detecting stability of supernatant liquid accelerating agent |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104990829A (en) * | 2015-06-15 | 2015-10-21 | 江苏奥莱特新材料有限公司 | Method for detecting stability of supernatant liquid accelerating agent |
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Application publication date: 20130417 |