CN1290964C - Chemical oil displacement agent - Google Patents
Chemical oil displacement agent Download PDFInfo
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- CN1290964C CN1290964C CN 200510011807 CN200510011807A CN1290964C CN 1290964 C CN1290964 C CN 1290964C CN 200510011807 CN200510011807 CN 200510011807 CN 200510011807 A CN200510011807 A CN 200510011807A CN 1290964 C CN1290964 C CN 1290964C
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- Prior art keywords
- oil
- nano powder
- petroleum sulfonate
- agent
- water
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Abstract
The present invention relates to a chemical oil displacing agent which comprises modified inorganic nano powder silicon dioxide SiO2 and a petroleum sulfonate surfactant, wherein the nano powder takes 20 to 60% of the total weight, and the petroleum sulfonate takes 40 to 80% of the total weight. When in use, the nano powder and the petroleum sulfonate are compounded according to the ratio. The modified inorganic nano powder also comprises aluminium oxide Al2O3 or titanium dioxide TiO2 or a mixture of the aluminium oxide Al2O3 and the titanium dioxide TiO2. A modifier of the modified inorganic nano powder is a silane coupling agent of gamma-glycidyl ether oxypropyltrimethoxysilane KH560 or gamma-methylpropene acyloxy oxypropyltrimethoxysilane KH570, etc. The metal ion in the petroleum sulfonate is sodium or potassium or calcium or ammonium. The oil displacing agent prevents alkali from damaging the earth, and is favorable for the continuous exploitation of petroleum. The present invention has the advantages that crude oil and water with super low interfacial tension can be ensured in a wider range, the recovery ratio of the crude oil is enhanced, the component is single, the problem that the oil displacing efficiency is decreased due to the chromatographic resolution effect is overcome to a certain extent, and the oil displacing cost is low.
Description
Technical field
The present invention relates to a kind of chemical oil displacement agent, be applicable to tertiary oil recovery on the petroleum industry.
Background technology
Nowadays in China's Petroleum Industry, many oil fields are experiencing underground original oil spout, after the water displacing oil, extraction liquid is moisture up to about 90%, and according to internationally recognized standard, moisture dosage reaches at 97% o'clock and is no benefit oil recovery, but extraction this moment underground storage only reaches about 30%, more than 70% the crude oil that also contains for extraction is underground need carry out tertiary oil recovery, and the application of tertiary oil recovery technology has at present obtained paying attention to widely.In the latter stage of waterflooding, irreducible oil be with the immobilized spherical distribution in the hole of reservoir rocks.Reducing interfacial tension is to force the irreducible oil mobile sole mode that is trapped in the porous medium, also is the effective ways that can increase substantially oilfield exploitation efficient.Oil-displacing agent must be reduced to 10 with oil water interfacial tension
-3MN.m
-1Or the lower order of magnitude, otherwise will there be practical value.At present, the ternary composite displacement system that the relatively more extensive tertiary oil recovery technology that adopts is made up of tensio-active agent, alkali, polymkeric substance, as: patent 94110555.5 and 99108128.5 disclosed flooding systems, it can improve displacement efficiency, can enlarge swept volume again, realize the purpose of further raising recovery ratio.But in the ternary composite driving that uses in most of oil fields, for reaching the purpose that improves recovery ratio, the consumption of alkali is very big.Alkali by a large amount of absorption, has stopped up the duct, stratum in the stratum, destroyed the structure on stratum, easily causes many drawbacks such as oil well fouling.In addition, in ternary compound oil drive, tensio-active agent uses blending ingredients more, because the difference of character between component, cause it in oil reservoir, to have the chromatographic separation phenomenon, thereby can destroy the integrity of original formulation system, therefore can make established ultra low interfacial tension disappear, so that oil displacement efficiency reduce.
Summary of the invention
The technical problem to be solved in the present invention is: a kind of chemical oil displacement agent that need not add alkali of (1) preparation; (2) improve oil recovery factor.
This chemical oil displacement agent comprises modified inorganic nano-powder silicon-dioxide and petroleum sulfonate surfactant two portions, earlier sulfonated petro-leum is dissolved in the mineralized water of stratum during use, again silicon dioxide nano powder is dispersed in this solution, makes the chemical displacement of reservoir oil system that comprises silicon dioxide nano powder and sulfonated petro-leum.
Inorganic nanometer powder accounts for 20～60% of gross weight in this chemical oil displacement agent, and sulfonated petro-leum accounts for 40～80% of gross weight.
Modified inorganic nano-powder in this chemical oil displacement agent also comprises: aluminium sesquioxide Al
2O
3Or titanium dioxide TiO
2Or wilkinite or kaolin, or the mixture of above several nano-powders.The properties-correcting agent of inorganic nanometer powder is γ-glycidyl ether oxygen propyl trimethoxy silicane KH560 or silane coupling agents such as γ-methacryloxypropyl trimethoxy silane KH570 or primary amine groups propyl-triethoxysilicane YDH792.
Tensio-active agent in this chemical oil displacement agent is a sulfonated petro-leum.
This chemical oil displacement agent can reduce effectively oily water termination tension force, its mechanism is: petroleum sulfonate surfactant and inorganic nanometer powder can produce certain synergistic effect so that oily the water termination tension value reach ultralow.This is because the hydrophobic performance of the inorganic nanoparticles after the modification processing increases greatly, help its absorption on water-oil interface, form oil-water interfacial film with the petroleum sulfonate surfactant molecule, increase along with the time, inorganic nanoparticles that adsorbs on the interfacial film and petroleum sulfonate surfactant molecule also increase gradually, film toughness increases, oily water termination tension force further descend, and reach ultralow.
Compared with prior art, advantage of the present invention is:
(1) the present invention makes oil water interfacial tension reach ultralow under the alkali-free situation, thereby has avoided the damage of alkali to the stratum, helps the Sustainable development of oil production;
(2) the present invention have good reduction oil water termination tensile ability, can guarantee in the scope of broad that crude oil and glassware for drinking water have ultra low interfacial tension, can increase substantially the recovery ratio of crude oil;
(3) the present invention forms comparatively singlely, overcomes the chromatographic separation effect to a certain extent and the decline of the oil displacement efficiency that causes;
(4) the raw materials used cost of the present invention is lower, therefore can reduce displacement of reservoir oil cost greatly.
Embodiment
Embodiment one:
Testing tool: TX-500C type gamut automatic dynamic spinning drop interfacial tensiometer;
Temperature: 70 ℃;
Oil: experimental standard crude oil;
Water: stratum mineralized water (salts contg 8000mgl
-1);
Inorganic nanometer powder: SiO
2
Flooding system: preparation 100ml active water, wherein modification SiO
2Powder 0.5g, sulfonated petro-leum 0.5g, surplus is a mineralized water;
Interfacial tension: 3.8 * 10
-3MNm
-1
Embodiment two:
Testing tool: TX-500C type gamut automatic dynamic spinning drop interfacial tensiometer;
Temperature: 70 ℃;
Oil: experimental standard crude oil;
Water: stratum mineralized water (salts contg 8000mgl
-1);
Inorganic nanometer powder: SiO
2
Flooding system: preparation 100ml active water, wherein modification SiO
2Powder 0.4g, sulfonated petro-leum 0.6g, surplus is a mineralized water;
Interfacial tension: 3.2 * 10
-3MN.m
-1
Embodiment three:
Testing tool: TX-500C type gamut automatic dynamic spinning drop interfacial tensiometer;
Temperature: 70 ℃;
Oil: experimental standard crude oil;
Water: stratum mineralized water (salts contg 8000mgl
-1);
Inorganic nanometer powder: TiO
2
Flooding system: preparation 100ml active water, wherein modification TiO
2Powder 0.5g, sulfonated petro-leum 0.5g, surplus is a mineralized water;
Interfacial tension: 2.6 * 10
-3MNm
-1
Embodiment four:
Testing tool: TX-500C type gamut automatic dynamic spinning drop interfacial tensiometer;
Temperature: 70 ℃;
Oil: experimental standard crude oil;
Water: stratum mineralized water (salts contg 8000mgl
-1);
Inorganic nanometer powder: Al
2O
3
Flooding system: preparation 100ml active water, wherein Modification on Al
2O
3Powder 0.5g, sulfonated petro-leum 0.5g, surplus is a mineralized water;
Interfacial tension: 5.3 * 10
-3MNm
-1
By specific embodiment as can be seen, this chemical oil displacement agent can make oily water termination tension force reach ultralow under the alkali-free situation, and the interfacial tension value is 2 * 10
-3～5 * 10
-3MNm
-1In the scope.The reduction of interfacial tension can be eliminated the capillary resistance in the oil displacement process effectively, helps migration, the coalescence of oil droplet, thereby improves oil recovery factor, and pollution-free.
Claims (2)
1. chemical oil displacement agent, it is characterized in that: it comprises the inorganic nanometer powder silicon-dioxide that utilizes properties-correcting agent γ-glycidyl ether oxygen propyl trimethoxy silicane or γ-methacryloxypropyl trimethoxy silane or the modification of primary amine groups propyl-triethoxysilicane, aluminium sesquioxide, titanium dioxide, wilkinite, the mixture of kaolin or above these several nano-powders and petroleum sulfonate surfactant two portions, nano-powder accounts for 20～60% of total composition weight, sulfonated petro-leum accounts for 40～80% of total composition weight, during use the two is got final product by this proportional range is composite.
2. by the described oil-displacing agent of claim 1, it is characterized in that: the metal ion in the said sulfonated petro-leum is sodium or potassium or calcium or ammonium.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510011807 CN1290964C (en) | 2005-05-27 | 2005-05-27 | Chemical oil displacement agent |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510011807 CN1290964C (en) | 2005-05-27 | 2005-05-27 | Chemical oil displacement agent |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1696240A CN1696240A (en) | 2005-11-16 |
| CN1290964C true CN1290964C (en) | 2006-12-20 |
Family
ID=35349135
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200510011807 Expired - Fee Related CN1290964C (en) | 2005-05-27 | 2005-05-27 | Chemical oil displacement agent |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1290964C (en) |
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| CN102796499A (en) * | 2012-08-16 | 2012-11-28 | 大庆百晟石油科技有限公司 | Novel profile control solution |
| US8387723B2 (en) | 2007-03-02 | 2013-03-05 | Tech-Star Fluid Systems Inc. | Drilling fluid and method for drilling in coal-containing formations |
| CN110016329A (en) * | 2019-05-14 | 2019-07-16 | 西南石油大学 | A kind of high temperature and high salt oil deposit original position emulsification system and its application |
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| CN1326970C (en) * | 2006-03-21 | 2007-07-18 | 北京交通大学 | Oil-displacing agent and production thereof |
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| CN106010493A (en) * | 2016-05-25 | 2016-10-12 | 中国石油大学(北京) | Composite oil displacement agent as well as preparation method and application thereof |
| CN106566511B (en) * | 2016-10-24 | 2019-03-01 | 中国石油大学(华东) | A kind of surfactant micellar oil displacement agent |
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| CN112680205B (en) * | 2019-10-17 | 2022-12-09 | 中国石油化工股份有限公司 | Surfactant oil displacement system and preparation method thereof |
| CN111909678A (en) * | 2020-08-25 | 2020-11-10 | 大庆中联信实石油科技开发有限公司 | Efficient nano oil displacement agent and preparation method thereof |
| CN112196503B (en) * | 2020-10-16 | 2022-07-12 | 中海石油(中国)有限公司 | Method for improving injectivity of oil displacement polymer |
| CN113136193B (en) * | 2021-04-23 | 2022-06-17 | 西南石油大学 | High-activity nano oil displacement agent and preparation method thereof |
| CN115975617A (en) * | 2021-10-15 | 2023-04-18 | 中国石油化工股份有限公司 | High-interfacial-tension high-interfacial-modulus composite emulsion and preparation method and application thereof |
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-
2005
- 2005-05-27 CN CN 200510011807 patent/CN1290964C/en not_active Expired - Fee Related
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8387723B2 (en) | 2007-03-02 | 2013-03-05 | Tech-Star Fluid Systems Inc. | Drilling fluid and method for drilling in coal-containing formations |
| US10738229B2 (en) | 2007-03-02 | 2020-08-11 | Canadian Energy Services L.P. | Drilling fluid and method for drilling in coal-containing formations |
| CN101531893A (en) * | 2009-04-28 | 2009-09-16 | 叶俊 | Functional resin tectorial membrane proppant and preparation method thereof |
| CN101531893B (en) * | 2009-04-28 | 2013-06-05 | 北京奇想达科技有限公司 | Functional resin tectorial membrane proppant and preparation method thereof |
| CN102796499A (en) * | 2012-08-16 | 2012-11-28 | 大庆百晟石油科技有限公司 | Novel profile control solution |
| CN110016329A (en) * | 2019-05-14 | 2019-07-16 | 西南石油大学 | A kind of high temperature and high salt oil deposit original position emulsification system and its application |
| CN110016329B (en) * | 2019-05-14 | 2021-02-26 | 西南石油大学 | High-temperature high-salinity oil reservoir in-situ emulsification system and application thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1696240A (en) | 2005-11-16 |
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Granted publication date: 20061220 |