CN102277143B - W/O/W type active viscous oil blocking agent used in oil well, and preparation method thereof - Google Patents
W/O/W type active viscous oil blocking agent used in oil well, and preparation method thereof Download PDFInfo
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- CN102277143B CN102277143B CN 201110141943 CN201110141943A CN102277143B CN 102277143 B CN102277143 B CN 102277143B CN 201110141943 CN201110141943 CN 201110141943 CN 201110141943 A CN201110141943 A CN 201110141943A CN 102277143 B CN102277143 B CN 102277143B
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- 239000002981 blocking agent Substances 0.000 title claims abstract description 51
- 239000003129 oil well Substances 0.000 title claims abstract description 17
- 238000002360 preparation method Methods 0.000 title claims description 40
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 110
- 239000000839 emulsion Substances 0.000 claims abstract description 30
- 235000020681 well water Nutrition 0.000 claims abstract description 10
- 239000002563 ionic surfactant Substances 0.000 claims abstract description 8
- JLVVSXFLKOJNIY-UHFFFAOYSA-N Magnesium ion Chemical compound [Mg+2] JLVVSXFLKOJNIY-UHFFFAOYSA-N 0.000 claims description 20
- 229910001425 magnesium ion Inorganic materials 0.000 claims description 20
- 239000003995 emulsifying agent Substances 0.000 claims description 17
- 238000003756 stirring Methods 0.000 claims description 15
- BHPQYMZQTOCNFJ-UHFFFAOYSA-N Calcium cation Chemical compound [Ca+2] BHPQYMZQTOCNFJ-UHFFFAOYSA-N 0.000 claims description 12
- 229910001424 calcium ion Inorganic materials 0.000 claims description 12
- 239000003109 Disodium ethylene diamine tetraacetate Substances 0.000 claims description 11
- ZGTMUACCHSMWAC-UHFFFAOYSA-L EDTA disodium salt (anhydrous) Chemical compound [Na+].[Na+].OC(=O)CN(CC([O-])=O)CCN(CC(O)=O)CC([O-])=O ZGTMUACCHSMWAC-UHFFFAOYSA-L 0.000 claims description 11
- 235000019301 disodium ethylene diamine tetraacetate Nutrition 0.000 claims description 11
- 230000000536 complexating effect Effects 0.000 claims description 9
- -1 sorbitan fatty acid ester Chemical class 0.000 claims description 9
- 239000002349 well water Substances 0.000 claims description 9
- 239000008139 complexing agent Substances 0.000 claims description 6
- 235000014113 dietary fatty acids Nutrition 0.000 claims description 6
- 229930195729 fatty acid Natural products 0.000 claims description 6
- 239000000194 fatty acid Substances 0.000 claims description 6
- 239000004094 surface-active agent Substances 0.000 claims description 6
- DBMJMQXJHONAFJ-UHFFFAOYSA-M Sodium laurylsulphate Chemical compound [Na+].CCCCCCCCCCCCOS([O-])(=O)=O DBMJMQXJHONAFJ-UHFFFAOYSA-M 0.000 claims description 5
- HVUMOYIDDBPOLL-XGKPLOKHSA-N [2-[(2r,3r,4s)-3,4-dihydroxyoxolan-2-yl]-2-hydroxyethyl] octadecanoate Chemical compound CCCCCCCCCCCCCCCCCC(=O)OCC(O)[C@H]1OC[C@H](O)[C@H]1O HVUMOYIDDBPOLL-XGKPLOKHSA-N 0.000 claims description 5
- 239000000344 soap Substances 0.000 claims description 5
- BTURAGWYSMTVOW-UHFFFAOYSA-M sodium dodecanoate Chemical compound [Na+].CCCCCCCCCCCC([O-])=O BTURAGWYSMTVOW-UHFFFAOYSA-M 0.000 claims description 5
- BRPNNYXZQLLLSN-UHFFFAOYSA-N sodium;dodecane Chemical compound [Na+].CCCCCCCCCCC[CH2-] BRPNNYXZQLLLSN-UHFFFAOYSA-N 0.000 claims description 5
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims description 4
- 238000002156 mixing Methods 0.000 claims description 4
- 239000003208 petroleum Substances 0.000 claims description 4
- 239000011734 sodium Substances 0.000 claims description 4
- 229910052708 sodium Inorganic materials 0.000 claims description 4
- 229940082004 sodium laurate Drugs 0.000 claims description 4
- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical compound [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 0.000 claims description 4
- PIICEJLVQHRZGT-UHFFFAOYSA-N Ethylenediamine Chemical compound NCCN PIICEJLVQHRZGT-UHFFFAOYSA-N 0.000 claims description 3
- QPCDCPDFJACHGM-UHFFFAOYSA-N N,N-bis{2-[bis(carboxymethyl)amino]ethyl}glycine Chemical compound OC(=O)CN(CC(O)=O)CCN(CC(=O)O)CCN(CC(O)=O)CC(O)=O QPCDCPDFJACHGM-UHFFFAOYSA-N 0.000 claims description 3
- 125000001301 ethoxy group Chemical group [H]C([H])([H])C([H])([H])O* 0.000 claims description 3
- 229960003330 pentetic acid Drugs 0.000 claims description 3
- ILJSQTXMGCGYMG-UHFFFAOYSA-N triacetic acid Chemical compound CC(=O)CC(=O)CC(O)=O ILJSQTXMGCGYMG-UHFFFAOYSA-N 0.000 claims description 3
- 238000002347 injection Methods 0.000 abstract description 14
- 239000007924 injection Substances 0.000 abstract description 14
- 238000000034 method Methods 0.000 abstract description 13
- 230000008569 process Effects 0.000 abstract description 12
- 238000010276 construction Methods 0.000 abstract description 3
- 239000002131 composite material Substances 0.000 abstract description 2
- 230000007547 defect Effects 0.000 abstract 2
- 239000002736 nonionic surfactant Substances 0.000 abstract 1
- 239000003921 oil Substances 0.000 description 31
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 8
- 239000011575 calcium Substances 0.000 description 8
- 229910052791 calcium Inorganic materials 0.000 description 8
- 239000000203 mixture Substances 0.000 description 8
- 239000010865 sewage Substances 0.000 description 7
- 239000007762 w/o emulsion Substances 0.000 description 5
- 239000010779 crude oil Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000007764 o/w emulsion Substances 0.000 description 4
- 230000008719 thickening Effects 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 230000015556 catabolic process Effects 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 2
- 238000004945 emulsification Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000013508 migration Methods 0.000 description 2
- 230000005012 migration Effects 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 239000008398 formation water Substances 0.000 description 1
- 239000000499 gel Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000002269 spontaneous effect Effects 0.000 description 1
- 239000008307 w/o/w-emulsion Substances 0.000 description 1
Landscapes
- Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
Abstract
The invention discloses a W/O/W type active viscous oil blocking agent. The blocking agent comprises internal phase water, viscous oil and external phase water. A nonionic surfactant is adopted between the internal phase water and the viscous oil. An ionic surfactant is adopted between the viscous oil and the external phase water. According to the invention, a W/O/W composite structure is adopted, W/O with a relatively large viscosity is coated by the external phase water layer, such that defects in prior arts of high viscosity, high construction pressure and poor selectivity upon an oil-water layer during an active viscous oil blocking agent injection process are overcome. With the blocking agent provided by the invention, the ground fluidity is good, and the injection pressure is low. When the blocking agent enters the stratum, the emulsion is demulsified, and W/O emulsion with a high viscosity is released, such that oil well water exits can be effectively blocked, and defects of existing active viscous oil blocking agents are overcome. The technical scheme provided by the invention is especially suitable for technical features of offshore oilfields.
Description
Technical field
The present invention relates to a kind of oil well with active viscous crude blocking agent, particularly relate to the active viscous crude blocking agent of a kind of W/O/W type and preparation method.
Background technology
Well water is ubiquitous problem in the oilfield development process.The harm that well water causes is fairly obvious, as reducing oil production, increases aquifer yield, improves the expense of water treatment etc.For addressing this problem, people adopt diversified blocking agent to carry out water blockoff, and blocking agent comprises: cement, resin, particle, gel, inorganic precipitation etc.But top described blocking agent does not have the not characteristic of stifled oil of real water blockoff.
For reducing blocking agent to the injury of oil reservoir, people do a lot of work, wherein the viscous crude blocking agent is one of selective blocking agent few in number of generally acknowledging at present, can't block in the situations such as envelope, water exit are not clear at oil well operation, and use viscous crude blocking agent can obtain good effect.Active viscous crude blocking agent is the high viscosity viscous crude that is added with an amount of water-in-oil emulsifier, active viscous crude under high pressure injects oil-well strata, the active viscous crude that enters oily discharge orifice road will be dissolved in in-place oil and from oil well produced, the active viscous crude in ingoing stream duct mixes and emulsification with formation water or the injected water of seepage flow, form water-in-oil emulsion, viscosity increases, and suppresses the water layer water outlet.
But some problems have in use appearred in active viscous crude blocking agent, and main manifestations is: the first, and active viscous crude blocking agent is take viscous crude as continuous phase, and injection pressure is high.Active viscosity of thickened oil is higher, and generally more than 300mPa.s, therefore in work progress, viscous crude and the frictional resistance that injects between pipeline, viscous crude and the stratum are very large, cause surface injection pressure high.The second, active viscous crude blocking agent is the oil base blocking agent, in injection process, can at first enter the high oil reservoir position of oil reservoir or oil saturation, enters the corresponding minimizing of viscous crude blocking agent of well water layer position, thereby affects the period of validity of water blockoff.
For solving the shortcoming of active viscous crude, people have worked out water bag viscous crude blocking agent.Viscous crude is made water bag viscous oil emulsion, and breakdown of emulsion occurs on the stratum behind the stratum in injection, discharges viscous crude, suppresses the water layer water outlet.It is to rely on the viscous crude oneself viscosity to come water blockoff, and oil-in-water emulsion is take water as continuous phase, and viscosity is low during injection, easily injects, but is subjected to the impact of the viscometric properties of viscous crude own, and water plugging effect is restricted.
For addressing the above problem, people have worked out again viscous oil emulsion phase inversion water blockoff.Make with 100 ℃～110 ℃ viscous crude of temperature and oil-in-water emulsion first and contain 30% oil-in-water emulsion, then add 3%～10% swell soil and a small amount of water-in-oil emulsifier, mix rear injection underground, after entering the stratum, the oil-in-water emulsion phase inversion is the high viscosity WO emulsion, the shutoff water layer.It has overcome the shortcoming of above-mentioned water bag viscous crude blocking agent to a certain extent, the viewpoint of tackify in the stratum has been proposed, but because the stirring action that oil reservoir seepage flow provides is very faint, therefore, under formation condition, viscous crude is difficult to spontaneous emulsification and becomes W/O emulsion, simultaneously, the phase inversion agent in this technology is mainly the solid particle swell soil, and viscous crude field is the screen casing that generally adopts of offshore oilfield-gravel filling sand prevention completion mode particularly, the granular pattern blocking agent can't be passed through, and use is restricted.
Summary of the invention
The object of the invention is to overcome deficiency of the prior art, a kind of oil well active viscous crude blocking agent of W/O/W type that is suitable for is provided.
Second purpose of the present invention is to provide the preparation method of the active viscous crude blocking agent of a kind of W/O/W type.
Purpose of the present invention is achieved by following technical proposals:
A kind of oil well that is suitable for comprises Nei Xiangshui, viscous crude and foreign minister's water with the active viscous crude blocking agent of W/O/W type, uses nonionic surface active agent between described interior phase water and the viscous crude, uses ionic surfactant between described viscous crude and the foreign minister's water.
In the described viscous crude, gum asphaltic content is not less than 30wt%.
Described nonionic surface active agent is a kind of in sorbitan fatty acid ester, Span60, the NPE-4.
Described ionic surfactant is a kind of in dodecyl sodium soap, dodecyl sodium sulfate, neopelex, the petroleum sodium sulfonate.
A kind of preparation method who is suitable for the active viscous crude blocking agent of oil well usefulness W/O/W type, carry out according to following step:
(1) water-in-oil emulsifier of its weight 0.5%～5% of adding in viscous crude mixes, and adds the preparation water of viscous crude weight 10%～50% again, stirs, and makes the w/o type emulsion that contains interior phase water;
(2) oil-water emulsifiers of its weight 1%～3% of adding in the preparation water after mixing, is prepared water as the foreign minister and is used;
(3) foreign minister that the w/o type emulsion that contains interior phase water that step (1) is prepared adds step (2) preparation prepares in the water, wherein the foreign minister of step (2) preparation prepare the weight of water be step (1) preparation the w/o type emulsion weight that contains interior phase water 50%～100%, stir and namely obtain a kind of oil well with the active viscous crude blocking agent of W/O/W type.
In the described viscous crude, gum asphaltic content is not less than 30wt%.
Described water-in-oil emulsifier is nonionic surface active agent, a kind of as in sorbitan fatty acid ester, Span60, the NPE-4.
Described oil-water emulsifiers is ionic surfactant, a kind of as in dodecyl sodium soap, dodecyl sodium sulfate, neopelex, petroleum sodium sulfonate, the sodium laurate.
Described configuration water is the water behind the calcium ions and magnesium ions in the complexing water, and use therein complexing agent is a kind of in disodium ethylene diamine tetraacetate, ethylenediamine ethoxy triacetic acid, the diethylenetriamine pentaacetic acid; When being configured, at first according to the calcium ions and magnesium ions total content in the water, be that 1: 1 ratio adds complexing agent in calcium, magnesium ion quantity sum and complexing agent mol ratio, with calcium ions and magnesium ions in the complexing water.
The active viscous crude blocking agent of a kind of W/O/W type of the present invention, utilize the output viscous crude in this well, this oil field or other oil fields to be raw material, at first carry out thickening by the mode that forms water-in-oil emulsion, then the further aquation of the oil after the thickening is dispersed into low viscous W/O/W emulsion (being the active viscous crude blocking agent of W/O/W type).In the oil reservoir injection process, major part in the viscous crude blocking agent of the present invention can initiatively select to enter the saturate exhalant canal of well water, because oil-water emulsifiers and the calcium ions and magnesium ions in the water layer of ionic surfactant are had an effect (the at first calcium ions and magnesium ions in the complexing water), and then lost efficacy, therefore can in migration process, progressively discharge the water-in-oil emulsion of thickening (because water-in-oil emulsifier is nonionic surface active agent, can keep the stable of water-in-oil emulsion), reach the purpose of shutoff well water passage; On the other hand, fraction in the viscous crude blocking agent of the present invention can oil reservoir, because the oil-water emulsifiers of ionic surfactant can play lubricated and fall low viscous effect, so that the viscous crude blocking agent is dissolved in crude oil, and with output crude oil outflow ground, avoided the impact on oil reservoir.
Technical scheme of the present invention is owing to adopting the composite construction of W/O/W, adopt foreign minister's water layer to wrap up the larger W/O of viscosity, can overcome in the prior art active viscous crude blocking agent injection process viscosity large, operation pressure is high, shortcoming to the oil-water-layer poor selectivity, has the ground good fluidity, injection pressure is low, enter emulsion breakdown behind the stratum and discharge the characteristics of high viscosity W/O emulsion, effective shutoff well water layer position, remedied the deficiency of present active viscous crude blocking agent, need to prove that technical scheme of the present invention is particularly suitable for the process characteristic of offshore oilfield, avoid the disaster hidden-trouble that in the land construction heating, viscosity reducing technique of high viscosity emulsion brought, can solve better the aborning problem of later stage well water of offshore oilfield, have a extensive future.
The specific embodiment
Further specify technical scheme of the present invention below in conjunction with specific embodiment.
Embodiment 1
Get Oil Field SZ36 1 in Bohai J platform output sewage, calcium, the magnesium ion content sum measured in the sewage are 420mg/L, by calcium, magnesium ion in the disodium EDTA complexing water of 1: 1 ratio of the mol ratio adding 4515mg/L of disodium ethylene diamine tetraacetate and calcium ions and magnesium ions sum.
The NPE-4 that in Oil Field SZ36 1 in Bohai J platform output viscous crude, adds 3wt%, mix, then slowly add the preparation water of viscous crude weight 30wt%, in adding the water process, constantly stir simultaneously, stir 50 minutes kinds, make the w/o type emulsion that contains interior phase water 30wt%.
After processing, prepare in the water and to add the 2wt% dodecyl sodium sulfate, mix and prepare water as the foreign minister and use afterwards; The foreign minister who the w/o type emulsion that contains interior phase water of preparation is added preparation prepares in the water, and wherein the foreign minister of the preparation weight of preparing water stirred 10 minutes for 80% of the w/o type emulsion weight that contains interior phase water of preparation, obtained W/O/W type viscous crude blocking agent.
Embodiment 2
In the NB 35-2 oilfield production waste of the 5000Kg Bohai Sea, the mol ratio according to complexing agent and calcium ions and magnesium ions sum behind the calcium in the measurement sewage, the magnesium ion content adds the disodium ethylene diamine tetraacetate of 2.42Kg as the preparation water at 1: 1.
The Span60 that in 3500Kg NB 35-2 oilfield viscous crude, adds 105Kg, mix, then slowly add 1500Kg preparation water, in adding the water process, constantly stir simultaneously, stir 20 minutes kinds, be made into the w/o type emulsion of 5105Kg moisture 29.4%.
In 3400Kg preparation water, add the 70Kg sodium laurate, after mixing; The 5105Kg w/o type emulsion of preparation is added wherein, stir 10 minutes kinds, make the W/O/W type viscous crude blocking agent of 8575Kg.
Embodiment 3
Get Oil Field SZ36 1 in Bohai J platform output sewage, calcium, the magnesium ion content sum measured in the sewage are 420mg/L, by calcium, magnesium ion in the disodium EDTA complexing water of 1: 1 ratio of the mol ratio adding 4515mg/L of disodium ethylene diamine tetraacetate and calcium ions and magnesium ions sum.
The sorbitan fatty acid ester that in Oil Field SZ36 1 in Bohai J platform output viscous crude, adds 5wt%, mix, then slowly add the preparation water of viscous crude weight 50wt%, in adding the water process, constantly stir simultaneously, stir 50 minutes kinds, make the w/o type emulsion that contains interior phase water 40wt%.
After processing, prepare in the water and to add 3wt% dodecyl sodium soap, mix and prepare water as the foreign minister and use afterwards; The foreign minister who the w/o type emulsion that contains interior phase water of preparation is added preparation prepares in the water, and wherein the foreign minister of the preparation weight of preparing water stirred 10 minutes for 100% of the w/o type emulsion weight that contains interior phase water of preparation, obtained W/O/W type viscous crude blocking agent.
Embodiment 4
Get Oil Field SZ36 1 in Bohai J platform output sewage, calcium, the magnesium ion content sum measured in the sewage are 420mg/L, by calcium, magnesium ion in the disodium EDTA complexing water of 1: 1 ratio of the mol ratio adding 4515mg/L of disodium ethylene diamine tetraacetate and calcium ions and magnesium ions sum.
The sorbitan fatty acid ester that in Oil Field SZ36 1 in Bohai J platform output viscous crude, adds 0.5wt%, mix, then the preparation water that slowly adds viscous crude weight 10wt%, in adding the water process, constantly stir simultaneously, stirred 50 minutes, and made the w/o type emulsion that contains interior phase water 10wt%.
After processing, prepare in the water and to add the 1wt% neopelex, mix and prepare water as the foreign minister and use afterwards; The foreign minister who the w/o type emulsion that contains interior phase water of preparation is added preparation prepares in the water, and wherein the foreign minister of the preparation weight of preparing water stirred 10 minutes for 50% of the w/o type emulsion weight that contains interior phase water of preparation, obtained W/O/W type viscous crude blocking agent.
On February 26th, 2009 was implemented W/O/W type viscous crude blocking agent water-blocking operation at Bohai Sea NB 35-2 oilfield A18 well.In whole work progress, use 360 tons of production wastes (after carrying out the calcium ions and magnesium ions complexing, use as the configuration water), 260 tons of the self-produced crude oil in this oil field (as the viscous crude raw material), 5.2 tons of Span60s, 3.75 tons of sodium laurates, disodium EDTA 175Kg, be prepared W/O/W viscous crude blocking agent according to technical scheme of the present invention, then carry out plugging function.Originally injection pressure is 2-3MPa, but progressively discharge the water-in-oil emulsion of thickening along with blocking agent in migration process, the injection pressure rising, injection pressure during the whole end of job reaches 5.8MPa, water content of oil well is reduced to 60wt% by 86wt%, and oil well daily output crude oil is steadily increasing, and this explanation W/O/W type viscous crude blocking agent water blockoff succeeds A18 is aboveground, substantially finished the shutoff to well water layer position, and oil reservoir has not been damaged.
Above the present invention has been done exemplary description; should be noted that; in the situation that do not break away from core of the present invention, the replacement that is equal to that any simple distortion, modification or other those skilled in the art can not spend creative work all falls into protection scope of the present invention.
Claims (3)
1. one kind is suitable for oil well with the preparation method of the active viscous crude blocking agent of W/O/W type, it is characterized in that, carries out according to following step:
(1) water-in-oil emulsifier of its weight 0.5%～5% of adding in viscous crude mixes, and adds the preparation water of viscous crude weight 10%～50% again, stirs, and makes the w/o type emulsion that contains interior phase water;
(2) oil-water emulsifiers of its weight 1%～3% of adding in the preparation water after mixing, is prepared water as the foreign minister and is used;
(3) foreign minister that the w/o type emulsion that contains interior phase water that step (1) is prepared adds step (2) preparation prepares in the water, wherein the foreign minister of step (2) preparation prepare the weight of water be step (1) preparation the w/o type emulsion weight that contains interior phase water 50%～100%, stir and namely obtain a kind of oil well with the active viscous crude blocking agent of W/O/W type;
In the described viscous crude, gum asphaltic content is not less than 30wt%;
Described water-in-oil emulsifier is a kind of in nonionic surface active agent sorbitan fatty acid ester, Span60, the NPE-4;
Described oil-water emulsifiers is a kind of in ionic surfactant dodecyl sodium soap, dodecyl sodium sulfate, neopelex, petroleum sodium sulfonate, the sodium laurate;
Described configuration water is the water behind the calcium ions and magnesium ions in the complexing water, a kind of as in disodium ethylene diamine tetraacetate, ethylenediamine ethoxy triacetic acid, the diethylenetriamine pentaacetic acid of the complexing agent that uses.
2. one kind is suitable for oil well with the active viscous crude blocking agent of W/O/W type, it is characterized in that, carries out according to following step:
(1) water-in-oil emulsifier of its weight 0.5%～5% of adding in viscous crude mixes, and adds the preparation water of viscous crude weight 10%～50% again, stirs, and makes the w/o type emulsion that contains interior phase water;
(2) oil-water emulsifiers of its weight 1%～3% of adding in the preparation water after mixing, is prepared water as the foreign minister and is used;
(3) foreign minister that the w/o type emulsion that contains interior phase water that step (1) is prepared adds step (2) preparation prepares in the water, wherein the foreign minister of step (2) preparation prepare the weight of water be step (1) preparation the w/o type emulsion weight that contains interior phase water 50%～100%, stir and namely obtain a kind of oil well with the active viscous crude blocking agent of W/O/W type;
In the described viscous crude, gum asphaltic content is not less than 30wt%;
Described water-in-oil emulsifier is a kind of in nonionic surface active agent sorbitan fatty acid ester, Span60, the NPE-4;
Described oil-water emulsifiers is a kind of in ionic surfactant dodecyl sodium soap, dodecyl sodium sulfate, neopelex, petroleum sodium sulfonate, the sodium laurate;
Described configuration water is the water behind the calcium ions and magnesium ions in the complexing water, a kind of as in disodium ethylene diamine tetraacetate, ethylenediamine ethoxy triacetic acid, the diethylenetriamine pentaacetic acid of the complexing agent that uses.
3. the active viscous crude blocking agent of the W/O/W type as claimed in claim 2 application of in oil field, land or marine oil field, stopping up well water.
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| CN 201110141943 CN102277143B (en) | 2011-05-30 | 2011-05-30 | W/O/W type active viscous oil blocking agent used in oil well, and preparation method thereof |
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| CN 201110141943 CN102277143B (en) | 2011-05-30 | 2011-05-30 | W/O/W type active viscous oil blocking agent used in oil well, and preparation method thereof |
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| CN102277143B true CN102277143B (en) | 2013-03-27 |
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2011
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