CN103059830A - Penetration agent for oil well, and preparation method as well as application thereof - Google Patents
Penetration agent for oil well, and preparation method as well as application thereof Download PDFInfo
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- CN103059830A CN103059830A CN2013100074547A CN201310007454A CN103059830A CN 103059830 A CN103059830 A CN 103059830A CN 2013100074547 A CN2013100074547 A CN 2013100074547A CN 201310007454 A CN201310007454 A CN 201310007454A CN 103059830 A CN103059830 A CN 103059830A
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Abstract
The invention discloses a penetration agent for oil well; the penetration agent is compounded by fluorocarbon surfactant and normal surfactant; the invention further discloses a preparation method and an application of the penetration agent for oil well. The penetration agent provided by the invention has the following beneficial effects: the penetration agent can greatly reduce the surface tension between liquid phase and solid phase, has a very high penetrating ability, can enter into pores of a rock rapidly and penetrate into agglomerated particles of stratum blockage so as to swell and loosen the blockage, therefore the subsequent plug removing liquid can enter the centre of the blockage successfully and can enter the stratum through the blockage; with the adoption of the penetration agent, the injection distance is increased and the purpose of deep plug removing is achieved. The proportion of the fluorocarbon surfactant and the normal surfactant and the working concentration of the penetration agent for oil well are selected out, so the achievement of better penetrating and swelling function is ensured, and meanwhile the dosage of the medicament is saved.
Description
Technical field
The present invention relates to a kind of oil well penetration agent and its preparation method and application.
Background technology
Producing well and water injection well are in process of production, because the impact of the variation of the flowing of stratum inner fluid, temperature and pressure field, the factors such as immersion of operation liquid all can form to the stratum obstruction of various ways, cause well oil output to descend, the minimizing of water injection well volume of water input, in order to recover and improve the throughput of oil, well, acidification to dispel block is one of major measure; Acidifying main raw commonly used was hydrochloric acid and hydrofluoric acid in the past, and these two kinds of acid all be strong acid, and the solia particle of the mineral substance in the stratum and operation liquid being brought into the stratum has very strong corrosion ability, can reach the effect of releasing reservoir choke; But the speed of response of hydrochloric acid and hydrofluoric acid and stratum mineral substance and tamper is very fast, 0.8m finishes substantially with internal reaction near well, along with constantly entering of follow-up acid solution, near layer by layer reaction well, thus better near the obstruction plugging removal effect the well, but after producing for some time, new obstruction can form again, and plug depth also can deepen, and in most cases acidifying validity period is about 120 days, carries out again reacidizing; So repeatedly react near well, make the formation cementation skeleton be subject to corrosion and destroy, broken landwaste can form tamper again, so the validity period of reacidizing is shortening trend, have in addition no longer include plugging removal effect.
Tell the reservoir of breathing out the oil field and be low hole, low permeability reservoir, the reservoir rock hole is tiny, and the permeate stream ability of convection cell is low, and is extremely strong to the susceptibility that solia particle stops up, especially water injection well, pressure rise is fast after the water filling, water injection rate decline is fast, and water filling is very difficult, common acidification to dispel block, acid solution is injected difficulty, plug removal radius is little, can not penetrate the pollution zone, deep, and plugging removal effect is relatively poor; In sum, the new de-plugging process of research is imperative.
Summary of the invention
Purpose of the present invention is exactly for above-mentioned defective of the prior art, the oil well penetration agent and its preparation method and application that provides a kind of speed of response can enter again relatively slowly the earth formation deep reaction.
To achieve these goals, technical scheme provided by the invention is: a kind of oil well penetration agent is by fluorocarbon surfactant and conventional surfactants is composite makes.
Further, above-mentioned a kind of oil well penetration agent, the mass ratio of described fluorocarbon surfactant and conventional surfactants is (0.05-0.1): (3-4).
Further, above-mentioned a kind of oil well penetration agent, described conventional surfactants is one or more in sulfonated petro-leum, petroleum carboxylate, natural carboxylates and the phosphoric acid fat salt.
Another object of the present invention has provided a kind of above-mentioned oil well with the preparation method of penetration agent, is to add fluorocarbon surfactant to carry out composite in conventional surfactants.
Further, above-mentioned preparation method, the add-on of described fluorocarbon surfactant are every preparation 1m
3Oil well needs to add 0.5Kg fluorine carbon promoting agent with penetration agent in the hydrocarbon promoting agent of 30Kg.
Further, above-mentioned preparation method, described conventional surfactants are one or more in sulfonated petro-leum, petroleum carboxylate, natural carboxylates and the phosphoric acid fat salt.
The 3rd purpose of the present invention provided the application of penetration agent in the oil well depth de-plugging of above-mentioned oil well.
Further, above-mentioned application, described oil well is 0.5%-0.7% with the working concentration of penetration agent according to mass percentage concentration.
Further, above-mentioned application, described oil well is preferably according to mass percentage concentration 0.5% with the working concentration of penetration agent.
Concrete working concentration is determined according to reservoir permeability: rate of permeation＜20 μ m
2, deep penetration agent working concentration selects 0.5%; Rate of permeation 〉=20 μ m
2, deep penetration concentration selects 0.7%(to tell to breathe out the oil field to need the rate of permeation on acidification to dispel block stratum＜20 μ m
2).
Beneficial effect of the present invention is: the surface tension between oil well provided by the invention penetration agent energy decrease liquid, the solid phase, has very strong penetrativity, can enter rapidly blowhole, be penetrated in the agglomerating particles of reservoir choke thing, its swelling is loose, make follow-up blockages relieving fluid enter smoothly the tamper core, and make blockages relieving fluid can alter tamper to enter the stratum, increase the injection distance, reached the purpose of removing clog in deep reservoir.Filter out the proportioning of fluorocarbon surfactant and conventional surfactants and the working concentration that oil well is used penetration agent, can guarantee to realize penetrating preferably swelling action, save again dosing simultaneously.
Description of drawings
Fig. 1 is the working concentration preferred result that oil well is used penetration agent.
Fig. 2 is water injection curve before and after the 13-17 well acidizing of mound.
Fig. 3 is water injection curve before and after the 13-17 well acidizing of mound.
Embodiment
Used fluorocarbon surfactant be commercially available fluorocarbon surfactant-FRS(fluorocarbon surfactant have in market import with domestic, what use in the present embodiment is the fluorocarbon surfactant that chemistry company limited in scholar of a specified duration city, Shanghai produces).
Embodiment 1:
Sulfonated petro-leum is that Zaozhuang, Shandong chemical industry company limited produces.
A kind of oil well penetration agent is by fluorocarbon surfactant and sulfonated petro-leum is composite makes.
The mass ratio of fluorocarbon surfactant and sulfonated petro-leum is 0.05:3.
A kind of oil well is to add fluorocarbon surfactant to carry out composite in sulfonated petro-leum with the preparation method of penetration agent.
The add-on of fluorocarbon surfactant is that every 30Kg sulfonated petro-leum adds 0.5Kg fluorine carbon promoting agent.
The application of penetration agent in the oil well depth de-plugging of a kind of oil well, oil well is 0.5% with the working concentration of penetration agent.
Embodiment 2:
A kind of oil well penetration agent is by fluorocarbon surfactant and petroleum carboxylate is composite makes.
The mass ratio of fluorocarbon surfactant and petroleum carboxylate is 0.1:4.
A kind of oil well is to add fluorocarbon surfactant to carry out composite in petroleum carboxylate with the preparation method of penetration agent.
The add-on of fluorocarbon surfactant is that every 40Kg petroleum carboxylate adds 1Kg fluorine carbon promoting agent.
The application of penetration agent in the oil well depth de-plugging of a kind of oil well, oil well is 0.7% with the working concentration of penetration agent.
Embodiment 3:
A kind of oil well penetration agent is by fluorocarbon surfactant and natural carboxylates is composite makes.
The mass ratio of fluorocarbon surfactant and natural carboxylates is 0.06:3.
A kind of oil well is to add fluorocarbon surfactant to carry out composite in natural carboxylates with the preparation method of penetration agent.
The add-on of fluorocarbon surfactant is that every 30Kg natural carboxylates adds 0.6Kg fluorine carbon promoting agent.
The application of penetration agent in the oil well depth de-plugging of a kind of oil well, oil well is 0.6% with the working concentration of penetration agent.
Embodiment 4:
A kind of oil well penetration agent is by fluorocarbon surfactant and composite the making of phosphoric acid fat salt.
The mass ratio of fluorocarbon surfactant and phosphoric acid fat salt is 0.07:3.5.
A kind of oil well is to add fluorocarbon surfactant to carry out composite in phosphoric acid fat salt with the preparation method of penetration agent.
The add-on of fluorocarbon surfactant is that every 35Kg phosphoric acid fat salt adds 0.7Kg fluorine carbon promoting agent.
The application of penetration agent in the oil well depth de-plugging of a kind of oil well, oil well is 0.5% with the working concentration of penetration agent.
Fluorocarbon surfactant: the Shanghai sincere heavy chemicals of bodyguard of a specified duration company limited.
Embodiment 5:
1, the technical requirements of penetration agent: the deep penetration agent must have powerful activity, viscosity lower more than 15% than blockages relieving fluid; Liquid, solid phase interface tension force reach ultralow interface value (interfacial tension 10-3mN/m is ultra low interfacial tension).
2, the screening of promoting agent:
For telling the characteristics of breathing out the oil field low-permeability oil deposit, screened the fluorocarbon surfactant-FRS of import, the aqueous solution very low in its concentration just has very doughtily wetting permeability, and it is easy to sprawl and permeate in solid matter surface such as rocks, and technical indicator is very good.It is the aqueous solution surface tension of different concns FRS in the table 1.
About the surface tension 24mN/m of common acidifying acid solution; See with test-results, when the FRS concentration of aqueous solution is very low, just can make surface tension drop to technical requirement.
3, the effect of penetration agent test:
Shown in the table 2, it is the performance test that oil well provided by the invention is used penetration agent.
Test-results shows, surface tension between penetration agent energy decrease liquid, the solid phase, has very strong penetrativity, can enter rapidly blowhole, be penetrated in the agglomerating particles of reservoir choke thing, its swelling is loose, make follow-up blockages relieving fluid enter smoothly the tamper core, and make blockages relieving fluid can alter tamper to enter the stratum, increased the injection distance, reach the purpose of removing clog in deep reservoir.
4, the core of penetration agent test:
(1) the rock core sheet of penetration agent drips and oozes test:
Shown in the table 3, for dripping with the rock core sheet of penetration agent, oil well provided by the invention oozes testing data.
Oil well provided by the invention is significantly less than the time of the wetting core of other kind permeate agents with time of the wetting core of penetration agent as seen from Table 3.
(2) working concentration is on the impact of penetration time:
In order to realize penetrating preferably swelling action, save again dosing simultaneously, the working concentration of penetration agent has been carried out preferably, the optimization experiment result is as shown in Figure 1.
As seen from Figure 1, the effect that penetrates of penetration agent increases along with the increase of concentration, but the amplitude that increases reduces gradually along with the increase of concentration, but reaches after the certain value when concentration, increases concentration again, and the amplitude of improving effect is just not fairly obvious.
What wherein penetration time was short still is the composite strong penetration agent of SAS and Rlee, after its total concn reaches 0.5%-0.7%, increases its concentration again, and penetration time is near definite value, and therefore optional optimum concn is 0.5%.
5, core flooding test:
The core flooding test-results is as shown in table 4:
As seen from Table 4, behind the injection penetration agent, owing to the surface tension that has reduced between the solid liquid phase, increased the percolation ability of follow-up fluid, rate of permeation has improved 13.8%.
Embodiment 6:
Test in place:
(1) selects the well condition
For the ease of analyzing contrast, selected the common acidification to dispel block of former usefulness to construct, the water injection well that had lost efficacy is constructed.
(2) construction technology (technological design and common acidifying are basic identical)
1, cleans pit shaft;
2, by de-plugging tubing string under the processing requirement;
3, fluid injection program:
Injecting penetration agent → slow blockages relieving fluid system → displacing liquid heads into earth formation deep → closing well with de-plugging and reacts → drive a well water filling.
(3) field experiment well case effect contrast:
Pound sign: Ling13-17Jing
1, conventional acidifying situation
Ling13-17Jing is low because of water injection rate, shorts and seriously carries out the acidifying augmented injection in 2008 06 month;
Before the acidifying: well head oil pressure 25MPa, daily water-injection rate 8m
3
After the acidifying: well head oil pressure 23MPa, daily water-injection rate 42m
3
Acidifying validity period 164 days, accumulative total augmented injection water yield 3360m
3, it is better to increase effect.
Water injection curve as shown in Figure 2 before and after the 13-17 well acidizing of mound.
2, deep penetration acidifying situation
Ling13-17Jing carried out the deep penetration acidizing treatment in 2009 03 month
Before the acidifying: well head oil pressure 24.3MPa, daily water-injection rate 12m
3
After the acidifying: well head oil pressure 15MPa, daily water-injection rate 54m
3
Acidifying validity period 294 days, accumulative total augmented injection water yield 7703m
3(remaining valid to the end of the year 2009);
Water injection curve as shown in Figure 3 before and after the 13-17 well acidizing of mound.
Mound 13-17 well depth penetrates validity period and nearly 10 months observation of accumulative total water injection rate process of acidifying, has improved more than 1 times than conventional acidifying, and effect is of great satisfaction.
(4) economic efficiency contrast
The merchandise cost of the conventional acidifying of mound 13-17 well is 12.6 ten thousand yuan
The merchandise cost that mound 13-17 well depth penetrates acidifying is 3.15 ten thousand yuan of 12.6 ten thousand yuan+deep penetration agent
The deep penetration acidifying changes into this than conventional acid has increased by 25%, and effect improves 1.3 times; Water injection pressure significantly descends after the deep penetration acidifying, has saved the energy (electric power); Extension of validity has reduced again augmented injection operation number of times; The water injection rate increase equals again to have increased petroleum production and (annotates 7m
3Water can be adopted 1 ton of oil).To sum up some, economic benefit and social benefit are very considerable.
(5) expanding test situation
Through the approval of testing for a long time, observe, analyze, summing up oil-field development unit and certainly, determine further expanding test; Test pit statistical effect such as table 5.
From the first situation of seeking property test pit of three mouthfuls of wells, deep acidizing augmented injection effect is basic identical and stable, has really played the effect of removing clog in deep reservoir.
It should be noted that at last: the above only is the preferred embodiments of the present invention, be not limited to the present invention, although with reference to previous embodiment the present invention is had been described in detail, for a person skilled in the art, it still can be made amendment to the technical scheme that aforementioned each embodiment puts down in writing, and perhaps part technical characterictic wherein is equal to replacement.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (9)
1. oil well penetration agent is characterized in that: be by fluorocarbon surfactant and conventional surfactants is composite makes.
2. oil well penetration agent as claimed in claim 1 is characterized in that: the mass ratio of described fluorocarbon surfactant and conventional surfactants is (0.05-0.1): (3-4).
3. oil well penetration agent as claimed in claim 1 or 2, it is characterized in that: described conventional surfactants is one or more in sulfonated petro-leum, petroleum carboxylate, natural carboxylates and the phosphoric acid fat salt.
4. the preparation method of an oil well usefulness penetration agent as claimed in claim 1 is characterized in that: be to add fluorocarbon surfactant to carry out composite in conventional surfactants.
5. preparation method as claimed in claim 4, it is characterized in that: the add-on of described fluorocarbon surfactant is every preparation 1m
3Oil well needs to add 0.5Kg fluorine carbon promoting agent with penetration agent in the hydrocarbon promoting agent of 30Kg.
6. preparation method as claimed in claim 5, it is characterized in that: described conventional surfactants is one or more in sulfonated petro-leum, petroleum carboxylate, natural carboxylates and the phosphoric acid fat salt.
7. the oil well as claimed in claim 1 application of penetration agent in the oil well depth de-plugging.
8. application as claimed in claim 7 is characterized in that: described oil well is 0.5%-0.7% with the working concentration of penetration agent according to mass percentage concentration.
9. application as claimed in claim 8 is characterized in that: described oil well is 0.5% with the working concentration of penetration agent according to mass percentage concentration.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| US11840666B1 (en) | 2022-08-02 | 2023-12-12 | Saudi Arabian Oil Company | Method to attenuate acid reactivity of subterranean formations with omniphobic chemicals |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101691839A (en) * | 2009-09-30 | 2010-04-07 | 陕西中孚石油技术有限责任公司 | Ultra-low resistance acid-type microemulsion plugging removal and stimulation technology for low permeability oil well |
| CN101705811A (en) * | 2009-10-12 | 2010-05-12 | 西安中孚凯宏石油科技有限责任公司 | Chemical pressure decreasing and augmented injection technology for strong sensitivity oil layer water injection well |
-
2013
- 2013-01-09 CN CN2013100074547A patent/CN103059830A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101691839A (en) * | 2009-09-30 | 2010-04-07 | 陕西中孚石油技术有限责任公司 | Ultra-low resistance acid-type microemulsion plugging removal and stimulation technology for low permeability oil well |
| CN101705811A (en) * | 2009-10-12 | 2010-05-12 | 西安中孚凯宏石油科技有限责任公司 | Chemical pressure decreasing and augmented injection technology for strong sensitivity oil layer water injection well |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| US11840666B1 (en) | 2022-08-02 | 2023-12-12 | Saudi Arabian Oil Company | Method to attenuate acid reactivity of subterranean formations with omniphobic chemicals |
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Application publication date: 20130424 |