CN102585791A - Displacement agent, preparation method thereof, and application of displacement agent to plugging removal of oil well - Google Patents
Displacement agent, preparation method thereof, and application of displacement agent to plugging removal of oil well Download PDFInfo
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- CN102585791A CN102585791A CN2012100013799A CN201210001379A CN102585791A CN 102585791 A CN102585791 A CN 102585791A CN 2012100013799 A CN2012100013799 A CN 2012100013799A CN 201210001379 A CN201210001379 A CN 201210001379A CN 102585791 A CN102585791 A CN 102585791A
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- drive row
- row agent
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- abs
- fluorocarbon surfactant
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Abstract
The invention relates to a displacement agent, in particular to the displacement agent for plugging removal of an oil well. The displacement agent consists of 0.3 to 0.6 mass percent of fluorocarbon surfactant, 3 to 6 mass percent of acrylonitrile butadiene styrene (ABS), and the balance of water. The invention also provides a preparation method for the displacement agent, and the application of the displacement agent to the plugging removal of the oil well. The total effective rate of oil well plugging removal of the displacement agent is 90 percent, 10.6m<3> of liquid is increased to each single well every day, and 30 tons of oil is increased to each oil well every day; and the displacement agent has a good effect of plugging removal of the oil well.
Description
Technical field
The present invention relates to a kind of drive row agent, in particular for the drive row agent of de-plugging of well.
Background technology
It is middle high water-cut development period that waterflooding oil field is developed mid-term, and oil well output is on a declining curve.The reason that the oil well produce oil descends is except that workable reserve reduces the decline with producing energy gradually; Along with the prolongation of producing and the increase of borehole operation number of times; The degree that oil well is polluted is increasing; Factor trend complicacy, the variety polluted, pollutent results in blockage to oil reservoir, and oil well output is further descended.Conclude pollutent and be divided into two big types: inorganics and organism.According to the water flood field Pollutant analysis, Organic pollutants are increase trend at present.
Organic pollutants, on the one hand because of reservoir pressure descends, near the degassing oil well shaft bottom, reservoir temperature descend, and the wax in the crude oil, bituminous matter, colloid are separated out, and condense in the rock gap surface; On the one hand be again bacterium grow breeding and metabolite thereof, mainly be the obstruction of sulphate reducing bacteria (SRB), saprophytic microorganism (TGB) to oil reservoir; The pollution that also has operations such as well control fluid, fracturing liquid, water plugging and profile controlling that oil reservoir is caused.In addition, along with the moisture continuous rising in oil field, when resident fluid flows to the shaft bottom from oil reservoir, two is arranged not only, sometimes or even three-phase stream, influence each other between phase and phase, the difficulty that makes reservoir fluid flow into the shaft bottom strengthens.
Inorganic pollution and Organic pollutants often coexist, and which kind of pollutes large percentage, are difficult to make accurate judgement on ground, bring very big difficulty for the de-plugging operation.Can remove inorganic obstruction with acidifying, utilize oxygenant can remove organic obstruction.But to the obstruction of complicacy, especially its plugging removal effect is stopped up still not as people's will in the above deep of pollution radius 1.5m.
External in recent years oil field has begun to use fluorocarbon surfactant oil well has been carried out plugging removal and stimulation; Fluorocarbon surfactant is more satisfactory to the organic deposition plugging removal effect of complicacy; Though fluorocarbon surfactant has many premium propertiess; Also be to remove the ideal material that the oil well organic deposition stops up, but, be it unpractical as main unblocking agent because its cost is expensive.
Summary of the invention
The purpose of this invention is to provide a kind of drive row agent, with fluorocarbon surfactant with carry out compositely, when reducing cost greatly, can guarantee the drive row performance that it is good again with cheap conventional surfactants ABS; Accordingly, the present invention also provides the preparation method and its application in de-plugging of well of this drive row agent.
To achieve these goals, the present invention provides a kind of drive row agent, and said drive row agent is made up of fluorocarbon surfactant, ABS and water.
Preferably, the mass ratio of said fluorocarbon surfactant and ABS is 0.1:1.
Preferably, the quality percentage composition of each component is in the said drive row agent:
Fluorocarbon surfactant: 0.3-0.6%;
ABS：3-6%；
All the other are water.
Preferably, the quality percentage composition of each component is in the said drive row agent:
Fluorocarbon surfactant: 0.5%;
ABS：5%；
All the other are water.
Second purpose of the present invention provides a kind of preparation method of drive row agent, be after fluorocarbon surfactant and ABS are mixed, and mixed solution is added to the water to be prepared from.
Preferably, the mass ratio of said fluorocarbon surfactant and ABS is 0.1:1.
Preferably, the quality percentage composition of each component is in the said drive row agent:
Fluorocarbon surfactant: 0.3-0.6%;
ABS：3-6%；
All the other are water.
The 3rd purpose of the present invention provides the application of drive row agent in de-plugging of well.
Preferably, the step of said application is:
A) combine borehole operation, select suitable working string to construct;
B) clean pit shaft: wash or the diluent well-flushing of said drive row agent with heat, remove the pollutent that adheres on the well inner tubal wall;
C) clamp-on said drive row agent to the stratum;
D) clamp-on acid solution to the stratum;
E) acid solution is all replaced the stratum, de-plugging of well is accomplished in closing well reaction 3-6 hour.
Preferably, the calculation formula of drive row agent consumption is in the said application:
V-drive row agent consumption, m
3
R-treatment radius, m
H-core intersection is m
Φ-porosity, %
Wherein, be the size of zone permeability to the basis for estimation of treatment radius, rate of permeation＜20 * 10
-3μ m
2, it is more shallow to pollute the degree of depth, and then treatment radius is no more than 1.5m; Rate of permeation (20-100) * 10
-3μ m
2, it is bigger to pollute the degree of depth, and then treatment radius is 1.5m-3.5m.
Description of drawings
Fig. 1 is the displacement examination driving device synoptic diagram that compound surfactant of the present invention uses in drive row oil aptitude tests experiment;
Fig. 2 is the experiment effect figure of No. 1 beaker in the dispersive ability experiment;
Fig. 3 is the experiment effect figure of No. 2 beakers in the dispersive ability experiment;
Fig. 4 is the experiment effect figure of No. 3 beakers in the dispersive ability experiment;
Fig. 5 is the experiment effect figure of No. 4 beakers in the dispersive ability experiment.
Embodiment
Fluorocarbon surfactant stoste that the present invention uses is available from the Shanghai sincere heavy chemicals of bodyguard of a specified duration ltd, product concentration: 25% (mass percent).
ABS among the present invention is available from Zaozhuang, Shandong chemical industry ltd, product concentration: >=98%.
Embodiment 1
The prescription of drive row agent of the present invention is: fluorocarbon surfactant stoste 200kg (quality that contains active substance and be fluorocarbon surfactant is 50kg), ABS 500kg, water 9300kg.
The preparation method of drive row agent of the present invention is: earlier 200kg fluorocarbon surfactant stoste and 500kg ABS are mixed, it is joined in the 9300kg water again, gentle agitation makes it all soluble in water, makes drive row agent of the present invention.
Embodiment 2
The prescription of drive row agent of the present invention is: fluorocarbon surfactant stoste 120kg (quality that contains active substance and be fluorocarbon surfactant is 30kg), ABS 300kg, water 9580kg.
The preparation method of drive row agent of the present invention is following: after earlier 120kg fluorocarbon surfactant stoste and 300kg ABS being mixed, it is joined in the 9580kg water, gentle agitation makes it all soluble in water, makes drive row agent of the present invention again.
Embodiment 3
The prescription of drive row agent of the present invention is: fluorocarbon surfactant stoste 240kg (quality that contains active substance and be fluorocarbon surfactant is 60kg), ABS 600kg, water 9160kg.
The preparation method of drive row agent of the present invention is following: after earlier 240kg fluorocarbon surfactant stoste and 600kg ABS being mixed, it is joined in the 9160kg water, gentle agitation makes it all soluble in water, makes drive row agent of the present invention again.
Embodiment 4
The prescription of drive row agent of the present invention is: fluorocarbon surfactant stoste: 160kg (quality that contains active substance and be fluorocarbon surfactant is 40kg), ABS 400kg, water 9560kg.
The preparation method of drive row agent of the present invention is following: after earlier 160kg fluorocarbon surfactant stoste and 400kg ABS being mixed, it is joined in the 9560kg water, gentle agitation makes it all soluble in water, makes drive row agent of the present invention again.
Carry out performance test with the drive row agent of 1 preparation of embodiment among the present invention below.
Embodiment 5
Drive row agent performance test of the present invention: 1. step disposes drive row agent 1000ml: earlier 20g fluorocarbon surfactant stoste+50g ABS is stirred, add in the ready 930ml water again, gentle agitation is evenly subsequent use.2. do the parallel appearance of 3 250ml.With surface tension instrument difference test surfaces tension force and IT.
The result of test is as shown in table 1.
Table 1
Oil water interfacial tension＜10mN/m is ultra low interfacial tension.According to test result; Drive row agent of the present invention belongs to ultralow oil water interfacial tension system, and the washing oil ability is strong, and crude oil is spun off from rock and oil-sand surface; Replaced oil well by extraction ground with flooding system by water drive, thereby improved tar productivity.
Embodiment 6
Drive row agent corrosion speed test of the present invention
With hanging slice method the steel disc suspension is immersed in the drive row agent, survey the steel disc rate of weight loss after 72 hours.Test result is 0.05g/ m
2H this shows that drive row agent corrodibility of the present invention is very little, than corrosion speed (7.8 g/m of common acid solution
2H) much lower.
Embodiment 7
The drive row oil aptitude tests of drive row agent of the present invention (with the ability of the deoiling contrast of water)
In the laboratory, we adopt the long fill out sand tube of 2m, and the artificial core of packing into makes the saturated crude oil of core, under 65 ℃ of envrionment temperatures, simulates oil recovery process, inject fresh water, local water and the contrast of drive row agent displacement test, and experimental result is as shown in table 2.
Table 2
Can find out that from table 2 data drive row agent displacement oil ability force rate displacement in flooding ability of the present invention has improved the RF of 13-25%, explains that drive row agent of the present invention has very strong infiltration cleaning function.
Embodiment 8
The dispersive ability of drive row agent of the present invention and solubilising viscosity reduction are estimated.
Prepare four beakers, be numbered 1,2,3,4; In No. 1 beaker and No. 3 beakers, respectively add drive row agent 250ml of the present invention, in No. 2 and No. 4 beakers, add the clear water of 250ml equivalent; Breathe out the analysis of crude oil wax content according to telling, add the oil well wax of 10g in each beaker respectively; No. 1 beaker and No. 2 beaker normal temperature are placed, and No. 3 beakers and No. 4 beakers are heated to 80 ℃ lets oil well wax dissolve the back condensation fully; Treat that beaker is cooled to the dissolving situation of checking oil well wax in the beaker behind the normal temperature.
As shown in Figure 2, the oil well wax in No. 1 beaker is dispersed under the effect of drive row agent, immerse the top of water fully; As shown in Figure 3, the oil well wax in No. 2 beakers is lumps, swims in the top of water; As shown in Figure 4, the oil well wax in No. 3 beakers is dispersed; As shown in Figure 5, the oil well wax in No. 4 beakers is the knot sheet.The drive row agent of the present invention of experiment proof has good dissemination.
The application implementation example
The application of drive row agent of the present invention in de-plugging of well:
1, combines borehole operation; Select suitable working string to construct: choosing layer or layering de-plugging should be selected the stratified operation tubing string; Low pressure well can adopt fixed tubular column de-plugging operation, and such selection can be shortened the activity duration, improves the oil well production timeliness and practices thrift operating cost;
2, clean pit shaft: with heat wash or the drive row agent of lower concentration slightly (prescription of drive row agent is following: the quality percentage composition that contains active substance and be fluorocarbon surfactant is 0.2%; The quality percentage composition of ABS is 2%; All the other are water) the solution well-flushing, remove the pollutent that adheres on the well inner tubal wall;
3, clamp-on drive row agent of the present invention to the stratum;
Wherein drive row agent consumption calculates according to formula:
V-drive row agent consumption, m
3
R-treatment radius, m
H-core intersection is m
Φ-porosity, %
Wherein, be the size of zone permeability to the basis for estimation of treatment radius, rate of permeation＜20 * 10
-3μ m
2, it is more shallow to pollute the degree of depth, and then treatment radius is no more than 1.5m; Rate of permeation=(20-100) * 10
-3μ m
2, it is bigger to pollute the degree of depth, and then treatment radius is 1.5m-3.5m;
Breathe out the oilfield reservoir rate of permeation according to telling, the treatment radius that the oil well pollution is removed in the drive row agent is a 1.5-3.5 rice;
4, clamp-on acid solution to the stratum, acid solution can be hydrochloric acid, hydrofluoric acid, fluoroboric acid, matt salt; And being used oxidation liquid, oxidation liquid can be selected dioxide peroxide for use;
5, acid solution is all replaced the stratum, de-plugging of well is accomplished in closing well reaction 3-6 hour, and the de-plugging of well effect is seen table 3.
Table 3
Can know by table 3: efficient 100% with 7 mouthfuls of wells of drive row agent de-plugging of the present invention construction, 3038 tons of incremental oil productions, most of well also remains valid, and effect is very desirable.
After utilizing drive row agent de-plugging test of the present invention to achieve success, promoted 32 wells, 16 wells, 14 wells successively respectively in warm rice bran oil field, Shanshan oil field, oil field, hills, total effective rate is 90%, and average individual well increases liquid 10.6m
3/ d, increase oily 3.0t/d, validity period 180 days, accumulative total increases about 20,000 tons of oil, is more than 5,000 ten thousand yuan of oil field wound net profits, practices thrift more than 300 ten thousand yuan of opexs.
The above is merely preferred embodiment of the present invention, and is in order to restriction the present invention, not all within spirit of the present invention and principle, any modification of being done, is equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. drive row agent is characterized in that: said drive row agent is made up of fluorocarbon surfactant, ABS and water.
2. drive row agent according to claim 1 is characterized in that: the mass ratio of said fluorocarbon surfactant and ABS is 0.1:1.
3. drive row agent according to claim 2 is characterized in that: the quality percentage composition of each component is in the said drive row agent:
Fluorocarbon surfactant: 0.3-0.6%;
ABS：3-6%；
All the other are water.
4. drive row agent according to claim 3 is characterized in that: the quality percentage composition of each component is in the said drive row agent:
Fluorocarbon surfactant: 0.5%;
ABS：5%；
All the other are water.
5. the preparation method of the described drive row agent of claim 1 is characterized in that: be after fluorocarbon surfactant and ABS are mixed, mixed solution is added to the water to be prepared from.
6. preparation method according to claim 5 is characterized in that: the mass ratio of said fluorocarbon surfactant and ABS is 0.1:1.
7. preparation method according to claim 6 is characterized in that: the quality percentage composition of each component is in the said drive row agent:
Fluorocarbon surfactant: 0.3-0.6%;
ABS：3-6%；
All the other are water.
8. each described drive row agent application in de-plugging of well of claim 1-4.
9. the application of a kind of drive row agent according to claim 8 in de-plugging of well, it is characterized in that: the step of said application is:
A) combine borehole operation, select suitable working string to construct;
B) clean pit shaft: wash or the diluent well-flushing of said drive row agent with heat, remove the pollutent that adheres on the well inner tubal wall;
C) clamp-on said drive row agent to the stratum;
D) clamp-on acid solution to the stratum;
E) acid solution is all replaced the stratum, de-plugging of well is accomplished in closing well reaction 3-6 hour.
10. the application of a kind of drive row agent according to claim 9 in de-plugging of well, it is characterized in that: the calculation formula of drive row agent consumption is in the said application:
V-drive row agent consumption, m
3
R-treatment radius, m
H-core intersection is m
Φ-porosity, %
Wherein, be the size of zone permeability to the basis for estimation of treatment radius, rate of permeation＜20 * 10
-3μ m
2, it is more shallow to pollute the degree of depth, and then treatment radius is no more than 1.5m; Rate of permeation is (20-100) * 10
-3μ m
2, it is bigger to pollute the degree of depth, and then treatment radius is 1.5m-3.5m.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210001379.9A CN102585791B (en) | 2012-01-04 | 2012-01-04 | Displacement agent, preparation method thereof, and application of displacement agent to plugging removal of oil well |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210001379.9A CN102585791B (en) | 2012-01-04 | 2012-01-04 | Displacement agent, preparation method thereof, and application of displacement agent to plugging removal of oil well |
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| CN102585791A true CN102585791A (en) | 2012-07-18 |
| CN102585791B CN102585791B (en) | 2014-03-19 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102942910A (en) * | 2012-11-27 | 2013-02-27 | 唐山市金沙工贸有限公司 | Surfactant for enhancing oil recovery factor |
| CN108977185A (en) * | 2017-06-02 | 2018-12-11 | 中国石油天然气集团公司 | A kind of cleaning solution and its preparation method and application for bug dusting |
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2012
- 2012-01-04 CN CN201210001379.9A patent/CN102585791B/en not_active Expired - Fee Related
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| CN1352350A (en) * | 2000-11-03 | 2002-06-05 | 中油辽河油田公司沈阳采油厂 | Composite deblocking process for oil layer |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102942910A (en) * | 2012-11-27 | 2013-02-27 | 唐山市金沙工贸有限公司 | Surfactant for enhancing oil recovery factor |
| CN108977185A (en) * | 2017-06-02 | 2018-12-11 | 中国石油天然气集团公司 | A kind of cleaning solution and its preparation method and application for bug dusting |
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|---|---|
| CN102585791B (en) | 2014-03-19 |
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