CN102367731A - Method for describing microscopic remaining oil distribution rule after water flooding - Google Patents
Method for describing microscopic remaining oil distribution rule after water flooding Download PDFInfo
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- CN102367731A CN102367731A CN2011102839648A CN201110283964A CN102367731A CN 102367731 A CN102367731 A CN 102367731A CN 2011102839648 A CN2011102839648 A CN 2011102839648A CN 201110283964 A CN201110283964 A CN 201110283964A CN 102367731 A CN102367731 A CN 102367731A
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Abstract
The invention discloses an experimental method for describing microscopic remaining oil after water flooding, which solves the problem of inaccuracy in the description of a microscopic remaining oil distribution rule. In the method, an epoxy resin solution which has an effect similar to that of oil-horizon rock and has a color is selected to replace crude oil in an experiment; a water-flooding process for an oil horizon is simulated; a water-flooding experiment is carried out; the curing is carried out after finishing the water-flooding experiment; an epoxy resin solution with another color is selected to displace water in rock core; the curing is carried out once again; a rock core casting body is finally formed; and the casting body is subjected to slicing and analyzing. As the method simulates an on-side construction process, the distribution rule of remaining oil displayed by the method is genuine and believable; and further, as resins with different colors are selected to cure, the obtained colors on a slice of the rock core casting body are very distinct and are direct-viewing, which are very beneficial to experimenters to carry out further analysis.
Description
Technical field
The present invention relates to oil field development laboratory experiment technical field, specifically describe the method for microcosmic Remaining Oil Distribution after the water drive.
Background technology
Behind the reservoir water drive; In the zone that water drive feeds through to; Also have a large amount of remaining oils to retain in the oil reservoir, become remaining oil, oil reservoir microcosmic Remaining Oil Distribution is for analyzing the movement disciplinarian of oil and water in the water drive process and selecting to improve the technological significant of recovery ratio after the accurate description water drive.Be used in the laboratory in the past to describe that the experimental technique of microcosmic remaining oil mainly contains following several kinds after the water drive; The one, use micromodel (comprising simulation model of microscopic, microcosmic sandpack column and true sandstone model) and carry out flood pot test; Through the image document after the admission experiment end, analyze the water drive remaining oil distribution features; The 2nd, take from the oil-containing sheet of oil reservoir through adding curing compound or freezing processing, then the methods analyst microcosmic remaining oil distribution features through graphical analysis or photofulorography.Though these methods can be described microcosmic remaining oil distribution form after the water drive to a certain extent; But also have certain limitation, wherein, the model that the experiment of application micromodel is adopted all is the physical model of two dimension; The water drive oil process under the three-dimensional oil reservoir condition that depicts that can not entirely accurate; Simultaneously, during analogue formation, need be with glass plate double team rock core sheet or oil reservoir sandstone particle and become the part of flow boundary; The character of glass plate and the character of reservoir rocks exist than big difference again, so distribution of remaining oil form and quantity are also had certain influence; And through solidifying the experimental technique of oil-containing sheet; Oil-bearing sand by the underground process of extracting ground in because the variation of conditions such as temperature, pressure; Profit in the sandstone pores distributes and is difficult to keep the little profit distribution form of reservoir condition, simultaneously, and in the process of slabbed core and abrasive disc; The variation of temperature or pressure also can make the profit distribution change.
Summary of the invention
The purpose of this invention is to provide a kind of can be accurately, the experimental technique of microcosmic Remaining Oil Distribution after the directviewing description water drive.
Be to realize the foregoing invention purpose, the technical scheme that the application adopts is: a kind of experimental technique of describing microcosmic remaining oil after the water drive comprises the steps:
1, the choosing and handling of rock core: choose the natural core of work target zone, and clean and dry;
2, injectant is used in the preparation experiment: extracting epoxy resin according to the viscosity of experiment demand, adds acetone diluted; Back adding ethylenediamine curing compound stirs; Stir once more, get two parts of mixed epoxy resin solutions, add the agent of color different dyeing respectively to all dissolvings;
3, find time saturated: it is saturated that rock core is found time, and adds wherein a kind of epoxy resin solution of color in the saturation history of finding time;
4, water drive: the NaCl solution of preparation 4000mg/L needs speed to carry out water drive to moisture 98%, to the residual oil state according to core permeability and experiment;
5, solidify: the rock core after the displacement is put into insulating box constant temperature, and the epoxy resin cure to rock core is complete, then oven dry;
6, find time once more saturated: it is saturated that the rock core after the oven dry is found time, and adds the epoxy resin solution of other a kind of color in the saturation history of finding time;
7, solidify once more: the rock core that will find time once more after saturated is put into insulating box constant temperature, to the epoxy resin cure formation body of casting;
8, section and abrasive disc: make the vertical or horizontal section of rock core, and grind into the casting body flake of 0.3mm thickness.
The principle explanation of experimental technique of the present invention: the experimental technique of microcosmic remaining oil after the application's the description water drive; Choose epoxy resin solution close with the reservoir rock action effect and that have color and replace the crude oil in the experiment; Simulation oil reservoir water drive oil process; Carry out flood pot test, experiment is cured after finishing, and solidifies the microcosmic remaining oil after this kind color ring epoxy resins that remains in the rock core can be estimated as water drive so; What need Special attention will be given to is because above operation is the simulation that the site operation process is carried out, and the epoxy resin of selecting for use in the simulation process be worked in advance and test with the parameter of crude oil approaching, so the distribution of remaining oil rule should be real.Water with in the epoxy resin solution of the another kind of color replacement water drive process is cured again, and the epoxy resin of another kind of color can be estimated as the water after the water drive in the rock core so; Rock core integral body through behind twice epoxy resin cure forms body of casting structure; Cut vertical or horizontal section according to the needs of analyzing this moment; Make casting body flake; Various colors is being represented different materials on the thin slice, at last through various distribution of remaining oil forms of the methods analyst of graphical analysis and quantity.
Beneficial effect of the present invention: this experimental technique at first is the once simulation to the site operation process, so the distribution of remaining oil rule that this method showed is genuine and believable; Again because the epoxy resin that the simulation remaining oil is used with epoxy resin and replacement water drive has adopted various colors respectively, so the casting body flake color of making is very distinct and directly perceived; The influence that can not receive external environment conditions such as temperature or pressure in the experimentation is arranged again, so the described profit distribution of this experimental technique is accurately.
Description of drawings
Fig. 1 is through amplifying the concrete distributional pattern of back various forms remaining oil.
The specific embodiment
Daqing oil field exploration and development academy utilizes this method to carry out the research work of PetroChina Company Ltd.'s scientific research and technology development project " recovery ratio key technology--4,000 ten thousand tons of lasting stable yields Study on Key Technique of Daqing oil field crude oil are improved in highly aqueous field "; Experimental study microcosmic remaining oil distribution behind the reservoir water flooding, analyzed microcosmic distribution of remaining oil form and quantity behind the reservoir water flooding.Its concrete experimentation is following:
1, the choosing and handling of rock core: choose the natural core of work target zone, the regulation execution of SY/5336-2006 press in the cleaning of rock core and oven dry;
2, injectant is used in the preparation experiment: get quantitative epoxy resin; The epoxy resin model that this experiment is selected for use is phoenix WSR6101; Add acetone (analyzing pure) by 40% of weight epoxy and be diluted to about 10mPas; Stir that the back adds ethylenediamine (analyzing pure) by 10% of weight epoxy so and stir and get two parts of mixed epoxy resin solutions, add respectively 0.5% methylene blue indicator and to reddish oil red-face role thing coloring agent to all dissolving;
3, find time saturated: it is saturated that rock core is found time, and adds the epoxy resin solution be mixed with reddish oil red-face role thing coloring agent in the saturation history of finding time, and the saturation history of finding time is carried out by the regulation of SY/5336-2006;
4, water drive: the NaCl solution of preparation 4000mg/L needs speed to carry out water drive to moisture 98%, to the residual oil state according to core permeability and experiment;
5, solidify to form residual oil: the rock core after the displacement was put into 45 ℃ of insulating box constant temperature 24 hours; Epoxy resin cure to rock core becomes solid state (thermostat temperature and time can be adjusted according to the experiment needs, as long as guarantee that epoxy resin solution solidifies fully);
6, rock sample oven dry: the rock core to being cured is dried, and furnace drying method is pressed the regulation of SY/5336-2006 and carried out;
7, find time once more saturated: it is saturated that the rock core after the oven dry is found time, and adds the epoxy resin solution be mixed with the methylene blue indicator in the saturation history of finding time, and the saturation history of finding time is carried out by the regulation of SY/5336-2006;
8, solidify to form the body of casting once more: the rock core that will find time once more after saturated was put into 45 ℃ of insulating box constant temperature 24 hours, guaranteed that epoxy resin cure forms the body of casting;
9, section and abrasive disc: according to analytic target rock core is carried out vertical or horizontal the section, and grind into the casting body flake of 0.3mm thickness, the film-making process is carried out with reference to SY/T 5913-2004 regulation;
10, casting body flake is taken a picture: according to the analysis needs rock core casting body flake is carried out macrophotograph;
11, analyze Remaining Oil Distribution: the rock core casting body flake photo according to picked-up carries out graphical analysis, confirms form, distribution characteristics and the quantity of remaining oil.
Need to prove for abovementioned steps 2:
A then need belong to the viscosity of in-place oil according to it if the rock core on other stratum, specifically adjusts the ratio of epoxy resin and acetone, and is final corresponding with institute's simulated formation viscosity of crude;
The dosage of B, said curing agent ethylene diamine also can be adjusted according to the experiment needs; Because the proportioning between epoxy resin and the ethylenediamine curing compound is the technology of a routine; So this proportion relation is not the emphasis of this method; Any only in the two proportioning difference and under the identical situation of other technologies, be regarded as identical with the present invention.
Experimental result is seen Fig. 1 and table 1, the darkest representative crude oil of color among Fig. 1, the representative rock matrix that color is the most shallow; Remainder is a water, because the application provides black and white picture, seems not directly perceived; And crude oil is used red display on the actual picture; Water shows that with blue rock matrix shows with white, and is very directly perceived.Table 1 is a various forms remaining oil proportion after the rock core water drive.
Microcosmic remaining oil distribution statistics after table 1 water drive
| The remaining oil form | Bunch shape remaining oil | The column remaining oil | Membranaceous remaining oil | Blind shape remaining oil |
| Proportion (%) | 92.4 | 2.2 | 3.7 | 1.7 |
Claims (1)
1. an experimental technique of describing microcosmic remaining oil after the water drive comprises the steps:
1), the choosing and handling of rock core: choose the natural core of work target zone, and clean and dry;
2), injectant is used in the preparation experiment: extracting epoxy resin according to the viscosity of experiment demand, adds acetone diluted; Back adding ethylenediamine curing compound stirs; Stir once more, get two parts of mixed epoxy resin solutions, add the agent of color different dyeing respectively to all dissolvings;
3), find time saturated: it is saturated that rock core is found time, and adds wherein a kind of epoxy resin solution of color in the saturation history of finding time;
4), water drive: the NaCl solution of preparation 4000mg/L needs speed to carry out water drive to moisture 98%, to the residual oil state according to core permeability and experiment;
5), solidify: the rock core after the displacement is put into insulating box constant temperature, and the epoxy resin cure to rock core is complete, then oven dry;
6) it is saturated to find time, once more: it is saturated that the rock core after the oven dry is found time, and adds the epoxy resin solution of other a kind of color in the saturation history of finding time;
7) solidify, once more: the rock core that will find time once more after saturated is put into insulating box constant temperature, to the epoxy resin cure formation body of casting;
8), section and abrasive disc: make the vertical or horizontal section of rock core, and grind into the casting body flake of 0.3mm thickness.
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103063687A (en) * | 2013-01-06 | 2013-04-24 | 中国石油大学(华东) | Device for acquiring and testing microcosmic distribution image of remaining oil in porous medium |
| CN103217370A (en) * | 2013-03-29 | 2013-07-24 | 肖建新 | Submicroscopic description method for observing coal seam roof sandstone pores |
| CN105240004A (en) * | 2015-10-28 | 2016-01-13 | 中国石油化工股份有限公司 | Method for measuring microscopic remaining oil after water flooding of natural rock core |
| CN105986789A (en) * | 2015-02-11 | 2016-10-05 | 中国石油化工股份有限公司 | High-water-cut oil reservoir microscopic water-drive rest oil water kinetics characterization method |
| CN106596346A (en) * | 2016-11-24 | 2017-04-26 | 中国石油天然气股份有限公司 | Device and method for controlling displacement quantity in determination of oil reservoir rock wettability |
| CN108868715A (en) * | 2018-06-02 | 2018-11-23 | 东北石油大学 | The method for determining matrix-high infiltration strip chemical flooding remaining oil distribution and migration rule with fractal theory |
| CN112282748A (en) * | 2020-11-12 | 2021-01-29 | 中国石油大学(北京) | Residual oil occurrence form discrimination method based on micro-fluidic and machine learning |
| CN115184118A (en) * | 2022-08-15 | 2022-10-14 | 西南石油大学 | Preparation method and preparation system of slice rock sample and core imbibition mechanism research method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1424485A (en) * | 2001-12-11 | 2003-06-18 | 大庆油田有限责任公司 | Device and method for microscopic quantitatively processing dynamic color image for oil drive |
| US20070034766A1 (en) * | 2005-08-15 | 2007-02-15 | Thompson Timothy W | Epoxy rock coaster |
| CN101074600A (en) * | 2007-06-18 | 2007-11-21 | 大庆石油学院 | Core-dissecting micro-analysis |
-
2011
- 2011-09-23 CN CN2011102839648A patent/CN102367731A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1424485A (en) * | 2001-12-11 | 2003-06-18 | 大庆油田有限责任公司 | Device and method for microscopic quantitatively processing dynamic color image for oil drive |
| US20070034766A1 (en) * | 2005-08-15 | 2007-02-15 | Thompson Timothy W | Epoxy rock coaster |
| CN101074600A (en) * | 2007-06-18 | 2007-11-21 | 大庆石油学院 | Core-dissecting micro-analysis |
Non-Patent Citations (1)
| Title |
|---|
| 祁庆祥: "《大庆油田开发论文集之二 油层物理方法研究》", 28 February 1991 * |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103063687A (en) * | 2013-01-06 | 2013-04-24 | 中国石油大学(华东) | Device for acquiring and testing microcosmic distribution image of remaining oil in porous medium |
| CN103217370A (en) * | 2013-03-29 | 2013-07-24 | 肖建新 | Submicroscopic description method for observing coal seam roof sandstone pores |
| CN105986789A (en) * | 2015-02-11 | 2016-10-05 | 中国石油化工股份有限公司 | High-water-cut oil reservoir microscopic water-drive rest oil water kinetics characterization method |
| CN105240004A (en) * | 2015-10-28 | 2016-01-13 | 中国石油化工股份有限公司 | Method for measuring microscopic remaining oil after water flooding of natural rock core |
| CN106596346A (en) * | 2016-11-24 | 2017-04-26 | 中国石油天然气股份有限公司 | Device and method for controlling displacement quantity in determination of oil reservoir rock wettability |
| CN108868715A (en) * | 2018-06-02 | 2018-11-23 | 东北石油大学 | The method for determining matrix-high infiltration strip chemical flooding remaining oil distribution and migration rule with fractal theory |
| CN112282748A (en) * | 2020-11-12 | 2021-01-29 | 中国石油大学(北京) | Residual oil occurrence form discrimination method based on micro-fluidic and machine learning |
| CN112282748B (en) * | 2020-11-12 | 2022-04-15 | 中国石油大学(北京) | Residual oil occurrence form discrimination method based on micro-fluidic and machine learning |
| CN115184118A (en) * | 2022-08-15 | 2022-10-14 | 西南石油大学 | Preparation method and preparation system of slice rock sample and core imbibition mechanism research method |
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Application publication date: 20120307 |