CN102967534A - Method for measuring association degree of water-soluble hydrophobic-associated-polymer-type thickening agent - Google Patents
Method for measuring association degree of water-soluble hydrophobic-associated-polymer-type thickening agent Download PDFInfo
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- CN102967534A CN102967534A CN2012104540029A CN201210454002A CN102967534A CN 102967534 A CN102967534 A CN 102967534A CN 2012104540029 A CN2012104540029 A CN 2012104540029A CN 201210454002 A CN201210454002 A CN 201210454002A CN 102967534 A CN102967534 A CN 102967534A
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Abstract
The invention discloses a method for measuring an association degree of a water-soluble hydrophobic-associated-polymer-type thickening agent. According to the method, an association degree correlation curve of the hydrophobic-associated-polymer-type thickening agent is quantitatively established, so that the association degree of the water-soluble associated-polymer-type thickening agent in a porous medium can be obtained through the correlation curve. After the association degree of the water-soluble associated-polymer-type thickening agent is quantized, and the proper association of the water-soluble associated-polymer-type thickening agent in the porous medium can be researched, so that the oil displacement efficiency of the thickening agent in oil deposit is improved, the product treatment is considered, and a technical scheme is provided for the product treatment of the water-soluble associated-polymer-type thickening agent.
Description
Technical field
The present invention relates to a kind of method of measuring the associating intensity of water-soluble hydrophobic associated polymer-type tackifier, belong to the oilfield chemical technology field.
Background technology
Water-soluble association polymer tackifier are a class water-soluble association polymers with a small amount of hydrophobic grouping on hydrophilic macromolecular chain, except containing a large amount of hydrophilic polar group, also contain a small amount of hydrophobic non-polar group.In aqueous solution, strong aquation occurs by forming hydrogen bond and hydrone in polar group, between non-polar group and polar water molecules repulsive interaction occurs, nonpolar hydrophobic grouping flocks together by power between mutual pattern ylid Chuihua molecule, and this effect is called the hydrophobic association effect.Different with hydrophobic grouping content in polymer concentration and the polymkeric substance, hydrophobic association can occur between the strand, also can occur in the same macromolecular chain, the thickening property of the association performance polymer solution by hydrophobic grouping reaches the purpose that enlarges the oil displacement agent swept volume, improves oil recovery factor.At present, the existing lot of documents report of the performance evaluation of water-soluble association polymer tackifier and rig-site utilization situation mainly comprises following several respects:
(1) hydrophobic monomer exploitation synthetic technology is mature on the whole, and bibliographical information is crossed all kinds of nonionics, kation and negative ion hydrophobic monomer.By exploring for many years, oneself is acknowledged as the synthetic best method of hydrophobic associated polymer two kinds of methods of micellar copolymerization and chemical modification.
(2) because hydrophobic group content is extremely low, although on the polymer molecular chain body construction characterizes, carried out a large amount of exploration work, large breakthrough is not arranged, the sign of distribution of hydrophobic groups mode particularly, progress is slow.
(3) to interact in solution be study hotspot always for hydrophobic associated polymer and surfactant, because the hydrophobic association polymer solution as purposes such as coating or pigment, Surfactant is extremely responsive, when surfactant exists, " security window " of its tackify is very narrow and small, is difficult for regulating.Therefore the scientists of the U.S., Sweden, France, Canada and many countries such as Chinese all once used various types of surfactants and dissimilar hydrophobic associated polymer to interact, and investigated the various actions of its mixed solution.
(4) research of hydrophobic associated polymer absorption behavior comes into one's own, but mainly concentrate on the absorption behavior research on the quartzy model system, IFP and Candu group cooperation have been carried out the absorption behavior research on surface of clay of AM/Cn cangue base polymer recently, domestic doctor Guo Yongjun has carried out water-soluble hydrophobic associated polymkeric substance in the absorption research of porcelain earth/water termination, and Zhang Jifeng etc. have studied the characterization of adsorption of hydrophobic associated polymer HAP on silica sand.
(5) research of hydrophobic associated water-soluble polymer solution polymer molecular aggregation state becomes focus, and this concerns that to probing polymer molecular aggregation state and macro property the aspect is significant, and the people such as domestic Feng Yu army and Xu Peng do a lot of work.
Report for the associating intensity control method research of water-soluble association polymer tackifier had not been arranged, study the association of water-soluble association polymer tackifier, quantizing water-soluble association polymer tackifier in solution and the associating intensity in the porous medium, is the key of the water-soluble association polymer tackifier oil displacement efficiency of better performance.
Summary of the invention
The purpose of this invention is to provide a kind of method of measuring the associating intensity of water-soluble hydrophobic associated polymer-type tackifier, technical method provided by the invention can the associating intensity of the water-soluble association polymer type of quantitative description tackifier in water and in porous medium, the method has been set up hydrophobic associated polymer associating intensity correlation curve quantitatively, can obtain the associating intensity of association polymer in water and in porous medium by correlation curve.
A kind of method of measuring the associating intensity of water-soluble hydrophobic associated polymer-type tackifier in water provided by the present invention comprises the steps:
(1) the water-soluble hydrophobic associated polymer-type tackifier water solution of preparation, and measure its viscosity, and be labeled as η
i
(2) add the beta-schardinger dextrin-of at least 3 kinds of variable concentrations in the described water-soluble hydrophobic associated polymer-type tackifier water solution, and measure the different viscosity of described water-soluble hydrophobic associated polymer-type tackifier water solution when adding concentration, and be labeled as η
cAnd the critical viscosity of the viscosity that records described water-soluble hydrophobic associated polymer-type tackifier water solution when tending towards stability, being labeled as η, the addition of the corresponding beta-schardinger dextrin-of described critical viscosity is labeled as critical concentration;
The difference that (3) can obtain described beta-schardinger dextrin-by step (1) and step (2) is added the relation curve between the viscosity of concentration and described water-soluble hydrophobic associated polymer-type tackifier water solution;
(4) add relation curve between the viscosity of concentration and described water-soluble hydrophobic associated polymer-type tackifier water solution according to the difference of the associating intensity calculation expression shown in the formula (1) and described beta-schardinger dextrin-, can obtain the relation curve between the associating intensity of the viscosity of described water-soluble hydrophobic associated polymer-type tackifier water solution and described water-soluble hydrophobic associated polymer-type tackifier, and then obtain the associating intensity of described water-soluble hydrophobic associated polymer-type tackifier in water;
In the formula (1), λ represents the associating intensity of described water-soluble hydrophobic associated polymeric viscosifiers in water.
In the above-mentioned method, described water-soluble hydrophobic associated polymer-type tackifier specifically can be AP-P4.
In the above-mentioned method, the volumetric concentration of described water-soluble hydrophobic associated polymer-type tackifier water solution can be 1750mg/L.
A kind of method of measuring the associating intensity of water-soluble hydrophobic associated polymer-type tackifier in porous medium provided by the invention comprises the steps:
(1) the water-soluble hydrophobic associated polymer-type tackifier water solution of preparation, described water-soluble hydrophobic associated polymer-type tackifier water solution is sheared, the water-soluble hydrophobic associated polymer-type tackifier water solution of collection after shearing, and measure its viscosity, be designated as η
i';
(2) respectively in the step (1) the water-soluble hydrophobic associated polymer-type tackifier water solution of the variable concentrations after shearing add the beta-schardinger dextrin-of described critical concentration, then carry out the mobile experiment of rock core, collect rock core outlet solution, and measure its viscosity, be designated as η ';
(3) the water-soluble hydrophobic associated polymer-type tackifier water solution after shearing in the step (1) is carried out the mobile experiment of described rock core, collect rock core outlet solution, and measure its viscosity, be designated as η
c';
(4) can obtain the associating intensity of described water-soluble hydrophobic associated polymer-type tackifier water solution in porous medium according to the associating intensity calculation expression shown in the formula (2);
In the formula (2): the associating intensity of the described water-soluble hydrophobic associated polymer-type tackifier of λ ' expression in porous medium.
In the above-mentioned method, described water-soluble hydrophobic associated polymer-type tackifier specifically can be AP-P4.
In the above-mentioned method, the volumetric concentration of described water-soluble hydrophobic associated polymer-type tackifier water solution can be 1750mg/L.
The beneficial effect that the present invention has is: after realizing quantizing the associating intensity of water-soluble association polymer type tackifier, can be by " appropriateness associate " of the water-soluble association polymer tackifier of research in porous medium, it takes into account the output object processing in oil displacement efficiency in oil reservoir in raising, and processing for water-soluble association polymer tackifier output object provides a technical scheme.
Description of drawings
Different beta-schardinger dextrin-s add concentration and relation curve without the AP-P4 solution viscosity of shearing among Fig. 1 embodiment 1.
Fig. 2 is the viscosity of the AP-P4 aqueous solution that obtains of embodiment 1 and the relation curve between its associating intensity.
Embodiment
Employed experimental technique is conventional method if no special instructions among the following embodiment.
Used material, reagent etc. if no special instructions, all can obtain from commercial channels among the following embodiment.
Embodiment 1, the associating intensity of the water-soluble association polymer type tackifier AP-P4 of mensuration in water
(1) preparation mother liquor: the AP-P4 mother liquor that adopts injected water preparation 5000mg/L, slaking 24h under reservoir temperature 65 degrees celsius, then dilution is the AP-P4 aqueous solution of 1750mg/L for concentration, a copy of it solution is kept intact, and remains another part employing and shears solution after 20s obtains shearing without 1 grade in mattress stirrer;
(2) add beta-schardinger dextrin-: the beta-schardinger dextrin-that adds respectively variable concentrations in the AP-P4 aqueous solution of not shearing and shearing behind the 20s, mass concentration is followed successively by 0.2285%, 0.08%, 0.068%, 0.028511%, 0.0186%, 0.01142% and 0.008571%, and measure the viscosity of different AP-P4 aqueous solution when adding concentration, learn after measured, when the interpolation mass concentration of beta-schardinger dextrin-is 0.068%, the viscosity of the AP-P4 aqueous solution after the described shearing behind the 20s no longer changes, when the interpolation mass concentration of beta-schardinger dextrin-is 0.08%, the viscosity of the AP-P4 aqueous solution after the described shearing behind the 20s no longer changes, and two add the critical concentration that concentration are beta-schardinger dextrin-;
The difference that (3) can obtain beta-schardinger dextrin-by step (1) and step (2) is added the relation curve between the viscosity of concentration and AP-P4 aqueous solution, and Fig. 1 is the interpolation concentration of beta-schardinger dextrin-and relation curve without the AP-P4 solution viscosity of shearing;
(4) calculate associating intensity: according to the relation curve between the viscosity of the associating intensity calculation expression shown in the formula (1) and different beta-schardinger dextrin-interpolation concentration obtained above and AP-P4 aqueous solution, obtain the viscosity of AP-P4 aqueous solution and the relation curve between its associating intensity, as shown in Figure 2;
By the curve among Fig. 2, can draw the associating intensity of AP-P4 in water.
Embodiment 2, the associating intensity of the water-soluble association polymer tackifier AP-P4 of mensuration in porous medium
(1) compound concentration is the AP-P4 aqueous solution of 1750mg/L, adopts to shear 20s without 1 grade in mattress stirrer, collects the liquid that the AP-P4 aqueous solution is injected 5PV～8PV interval, and to test its viscosity be 94.2mPa.s;
Then this AP-P4 aqueous solution is carried out the mobile experiment of rock core,
(2) adding mass concentration to the water-soluble hydrophobic associated polymer-type tackifier water solution of the concentration 1750mg/L after step (1) is sheared is to carry out the mobile experiment of rock core behind 0.068% the beta-schardinger dextrin-, used rock core physical dimension is Φ 2.5cm * 10cm, and perm-plug method is 1800 * 10
-3μ m
2, factor of porosity 25%; Collect rock core outlet solution, and to measure its viscosity number be 3.8mPa.s;
(3) use the water-soluble hydrophobic associated polymer-type tackifier water solution of the concentration 1750mg/L after step (1) is sheared to carry out the mobile experiment of rock core, used rock core physical dimension is Φ 2.5cm * 10cm, and perm-plug method is 1800 * 10
-3μ m
2, factor of porosity 25%; Collect rock core outlet solution, and measure its viscosity, be designated as 7.2mPa.s;
(4) obtaining the associating intensity of AP-P4 in porous medium according to the associating intensity calculation expression shown in the formula (2) is 3.8%.
Claims (6)
1. a method of measuring the associating intensity of water-soluble hydrophobic associated polymer-type tackifier in water comprises the steps:
(1) the water-soluble hydrophobic associated polymer-type tackifier water solution of preparation, and measure its viscosity, and be labeled as η
i
(2) add the beta-schardinger dextrin-of at least 3 kinds of variable concentrations in the described water-soluble hydrophobic associated polymer-type tackifier water solution, and measure the different viscosity of described water-soluble hydrophobic associated polymer-type tackifier water solution when adding concentration, and be labeled as η
cAnd the critical viscosity of the viscosity that records described water-soluble hydrophobic associated polymer-type tackifier water solution when tending towards stability, being labeled as η, the addition of the corresponding beta-schardinger dextrin-of described critical viscosity is labeled as critical concentration;
The difference that (3) can obtain described beta-schardinger dextrin-by step (1) and step (2) is added the relation curve between the viscosity of concentration and described water-soluble hydrophobic associated polymer-type tackifier water solution;
(4) add relation curve between the viscosity of concentration and described water-soluble hydrophobic associated polymer-type tackifier water solution according to the difference of the associating intensity calculation expression shown in the formula (1) and described beta-schardinger dextrin-, can obtain the relation curve between the associating intensity of the viscosity of described water-soluble hydrophobic associated polymer-type tackifier water solution and described water-soluble hydrophobic associated polymer-type tackifier, and then obtain the associating intensity of described water-soluble hydrophobic associated polymer-type tackifier in water;
In the formula (1), λ represents the associating intensity of described water-soluble hydrophobic associated polymer-type tackifier in water.
2. method according to claim 1, it is characterized in that: described water-soluble hydrophobic associated polymer-type tackifier are AP-P4.
3. method according to claim 1 and 2, it is characterized in that: the concentration of described water-soluble hydrophobic associated polymer-type tackifier water solution is 1750mg/L.
4. a method of measuring the associating intensity of water-soluble hydrophobic associated polymer-type tackifier in porous medium comprises the steps:
(1) the water-soluble hydrophobic associated polymer-type tackifier water solution of preparation, described water-soluble hydrophobic associated polymer-type tackifier water solution is sheared, the water-soluble hydrophobic associated polymer-type tackifier water solution of collection after shearing, and measure its viscosity, be designated as η
i';
(2) respectively in the step (1) the water-soluble hydrophobic associated polymer-type tackifier water solution after shearing add the beta-schardinger dextrin-of critical concentration described in the claim 1, carry out the mobile experiment of rock core, collect rock core outlet solution, and measure its viscosity, be designated as η ';
(3) the water-soluble hydrophobic associated polymer-type tackifier water solution after shearing in the step (1) is carried out the mobile experiment of described rock core, collect rock core outlet solution, and measure its viscosity, be designated as η
c';
(4) can obtain the associating intensity of described water-soluble hydrophobic associated polymer-type tackifier water solution in porous medium according to the associating intensity calculation expression shown in the formula (2);
In the formula (2): the associating intensity of the described water-soluble hydrophobic associated polymeric viscosifiers of λ ' expression in porous medium.
5. method according to claim 4, it is characterized in that: described water-soluble hydrophobic associated polymer-type tackifier are AP-P4.
6. according to claim 4 or 5 described methods, it is characterized in that: the concentration of described water-soluble hydrophobic associated polymer-type tackifier water solution is 1750mg/L.
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Cited By (2)
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| CN103342998A (en) * | 2013-07-24 | 2013-10-09 | 中国海洋石油总公司 | Modifying and flooding agent used for oilfield polymer flooding |
| CN108329897A (en) * | 2018-01-09 | 2018-07-27 | 中国石油大学(华东) | Oil base drilling fluid |
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| CN101885804A (en) * | 2010-05-28 | 2010-11-17 | 中国海洋石油总公司 | Method for preparing cationic polymer for increasing and/or stabilizing viscosity of hydrophobic association type polymer oil-displacing agent |
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| US20040072800A1 (en) * | 2002-10-11 | 2004-04-15 | Lifeng Zhang | Method for improving viscosity of thickeners for aqueous systems |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103342998A (en) * | 2013-07-24 | 2013-10-09 | 中国海洋石油总公司 | Modifying and flooding agent used for oilfield polymer flooding |
| CN103342998B (en) * | 2013-07-24 | 2015-09-02 | 中国海洋石油总公司 | A kind of adjusting driving agnet for oilfield polymer flooding |
| CN108329897A (en) * | 2018-01-09 | 2018-07-27 | 中国石油大学(华东) | Oil base drilling fluid |
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Address after: 100010 Beijing, Chaoyangmen, North Street, No. 25, No. Co-patentee after: CNOOC research institute limited liability company Patentee after: China Offshore Oil Group Co., Ltd. Address before: 100010 Beijing, Chaoyangmen, North Street, No. 25, No. Co-patentee before: CNOOC Research Institute Patentee before: China National Offshore Oil Corporation |
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