CN104693416A - Synthesis research of organic polycationic molecular film molecular film oil displacement agent - Google Patents
Synthesis research of organic polycationic molecular film molecular film oil displacement agent Download PDFInfo
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- CN104693416A CN104693416A CN201310645910.0A CN201310645910A CN104693416A CN 104693416 A CN104693416 A CN 104693416A CN 201310645910 A CN201310645910 A CN 201310645910A CN 104693416 A CN104693416 A CN 104693416A
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Abstract
The invention relates to a synthesis research of an organic polycationic molecular film molecular film oil displacement agent. The organic polycationic biquaternary ammonium salt molecular film molecular film oil displacement agent is synthesized through free radical and ring opening polymerization of chloropropylene oxide and dimethylamine in an aqueous solution under the initiation of a persulfuric acid-sodium sulfite initiation system, and a result of the microscopic rock core lithography analysis of the migration and distribution rules of the film displacement agent in the displacement process shows that the saturation of residual oil after the displacement through using the film agent is obviously reduced, the maximum saturation reaches 1.66%, the oil displacement efficiency is obviously improved, and the final oil displacement efficiency reaches 97.80%. The displacement efficiency of the film agent is 10-15% even 15.1% than the efficiency of water displacement in different injection periods, so the film agent can effectively improve the crude oil recovery efficiency.
Description
Technical field
The present invention relates to a kind of study on the synthesis of organic polycations Molecular Deposition Film Oil-displacing Agent, belong to field of oilfield chemistry.
Background of invention
Be different from conventional intensified oil reduction technology, the ultimate principle of the molecular film displacement of reservoir oil be in oil displacement process by filming flooding agent in the heat release of oil reservoir interfacial monolayer electrostatic adhesion, then orderly Self assembly ultrathin films is formed through successive sedimentation, reduce the adsorptive power of crude oil and rock surface, along with filming function from the close-by examples to those far off advances, under the washing away of water, crude oil is constantly from oil reservoir sur-face peeling, thus improves oil recovery factor.Filming flooding agent cationic groups in one and in having very strong electrical counteract effect between electronegative rock, just can adsorb securely.Therefore, cation group and hydrophobic group should be contained in filming flooding agent molecule, electrostatic force between positive and negative ion can be leaned on to be adsorbed in rock surface, and the hydrophilic radical arrangement that molecular side chain stretches can make its surface have wetting ability, thus change wettability of rock surface, reduce the viscous force of oil film and rock surface, increase washing oil effect.
Patent of the present invention is in conjunction with on the basis of the problems referred to above, by epoxy chloropropane and dimethylamine at persulfuric acid---under S-WAT initiator system causes, the polymerization methods simultaneously carried out by free radical and ring-opening polymerization has in aqueous synthesized a kind of organic polycations bi-quaternary ammonium salt Molecular Deposition Film Oil-displacing Agent, analyze the migration and redistribution rule of filming flooding agent in displacement process by microcosmic rock core lithography model, prove that the Molecular Deposition Film Oil-displacing Agent of synthesizing can improve oil recovery factor well.
Summary of the invention
The present invention relates to a kind of study on the synthesis of organic polycations Molecular Deposition Film Oil-displacing Agent, it is characterized in that:
Above-mentioned raw materials is preferably from epoxy chloropropane, dimethylamine: (volume fraction is 33%), Potassium Persulphate, S-WAT, acetone, dehydrated alcohol.
In system, the ratio of each component is: epoxy chloropropane 5 ~ 45 parts, and n (epoxy chloropropane): n (dimethylamine) is the ratio of 0.8 ~ 3.5(amount of substance), 8 ~ 50 parts, water, ammonium sulphite 0.5 ~ 5 part, Potassium Persulphate 0.1 ~ 3.5 part.
Concrete preparation method: the there-necked flask a certain amount of epoxy chloropropane being put into band condenser, then gauge water is added, under 30 ~ 50 DEG C of constant temperature, a certain amount of dimethylamine of agitation and dropping, 10 ~ 40min dropwises, then adds S-WAT, Potassium Persulphate is added after 5 ~ 20min, at 50 ~ 85 DEG C, react 5 ~ 10h, obtain sticky weak yellow liquid product. use washing with acetone 3 ~ 5 times, namely obtain product at 85 DEG C of dry 24h.
Accompanying drawing explanation
Fig. 1 adopts microcosmic lithography model to carry out the evaluation of filming flooding agent displacement test.Microcosmic rock core Areal porosity 30.46%, initial oil saturation 75.45%, irreducible water saturation 24.55%. test water is two rivers sewage, and filming flooding agent is the method synthesis that patent of the present invention relates to, and its mass concentration is 1500mg/L, and temperature is room temperature.Experimental result is shown in Fig. 1.From Fig. 1 microvisual model oil displacement experiment result: at the end of water drive, remaining oil saturation is 13.05%, oil displacement efficiency is 82.70%; Use film to drive rear remaining oil saturation obviously to reduce, minimum to 1.66%, oil displacement efficiency significantly improves, and final oil displacement efficiency reaches 97.80%.Film drives and improves 10% ~ 15% than waterflood efficiency period in difference injection, has been up to 15.1%, has illustrated that film effectively can improve the recovery ratio of crude oil.
Embodiment
Below in conjunction with embodiment, the present invention will be further described, but be not limited only to this.
Embodiment 1:
Epoxy chloropropane 20 parts, dimethylamine 25 parts, 18 parts, water, ammonium sulphite 0.25 part, Potassium Persulphate 0.25 part
Concrete preparation method: the there-necked flask by above-mentioned amount, epoxy chloropropane being put into band condenser, then water is added, under 30 DEG C of constant temperature, agitation and dropping dimethylamine, 10 dropwise, then add S-WAT, 10min adds Potassium Persulphate, at 55 DEG C, react 6.5h, obtain sticky weak yellow liquid product. use washing with acetone 3 ~ 5 times, namely obtain product at 85 DEG C of dry 24h.
Embodiment 2: epoxy chloropropane 30 parts, dimethylamine 20 parts, 30 parts, water, ammonium sulphite 1.5 parts, Potassium Persulphate 2 parts
Concrete preparation method is with embodiment 1.
Embodiment 3: epoxy chloropropane 40 parts, dimethylamine 10 parts (ratio of amount of substance), 40 parts, ammonium sulphite 0.35 part, Potassium Persulphate 0.55 part.
Concrete preparation method is with embodiment 1.
Claims (4)
1. the present invention relates to a kind of study on the synthesis of organic polycations Molecular Deposition Film Oil-displacing Agent, it is characterized in that: above-mentioned raw materials is preferably from epoxy chloropropane, dimethylamine: (volume fraction is 33%), Potassium Persulphate, S-WAT, acetone, dehydrated alcohol.
2. the study on the synthesis of a kind of organic polycations Molecular Deposition Film Oil-displacing Agent as described in the claims, in system, the ratio of each component is: epoxy chloropropane 5 ~ 45 parts, n (epoxy chloropropane): n (dimethylamine) is the ratio of 0.8 ~ 3.5(amount of substance), 8 ~ 50 parts, water, ammonium sulphite 0.5 ~ 5 part, Potassium Persulphate 0.1 ~ 3.5 part.
3. the study on the synthesis of a kind of organic polycations Molecular Deposition Film Oil-displacing Agent as described in the claims, Loading sequence is present price epichlorohydrin-dimethylamine-S-WAT-Potassium Persulphate.
4. the study on the synthesis of a kind of organic polycations Molecular Deposition Film Oil-displacing Agent as described in the claims, temperature of reaction is 50 ~ 85 DEG C, and the reaction times is 5 ~ 10h.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310645910.0A CN104693416A (en) | 2013-12-04 | 2013-12-04 | Synthesis research of organic polycationic molecular film molecular film oil displacement agent |
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| CN201310645910.0A CN104693416A (en) | 2013-12-04 | 2013-12-04 | Synthesis research of organic polycationic molecular film molecular film oil displacement agent |
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| CN104693416A true CN104693416A (en) | 2015-06-10 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105271497A (en) * | 2015-11-12 | 2016-01-27 | 唐山冀油瑞丰化工有限公司 | Method for increasing molecular weight of epoxy chloropropane and organic amine polymer |
| CN105647500A (en) * | 2016-02-24 | 2016-06-08 | 李�诚 | Molecular deposition film oil displacement agent as well as preparation method and application thereof |
-
2013
- 2013-12-04 CN CN201310645910.0A patent/CN104693416A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105271497A (en) * | 2015-11-12 | 2016-01-27 | 唐山冀油瑞丰化工有限公司 | Method for increasing molecular weight of epoxy chloropropane and organic amine polymer |
| CN105647500A (en) * | 2016-02-24 | 2016-06-08 | 李�诚 | Molecular deposition film oil displacement agent as well as preparation method and application thereof |
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Application publication date: 20150610 |