CN104403648A - Oily sludge profile control agent and preparation method thereof - Google Patents
Oily sludge profile control agent and preparation method thereof Download PDFInfo
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- CN104403648A CN104403648A CN201410577413.6A CN201410577413A CN104403648A CN 104403648 A CN104403648 A CN 104403648A CN 201410577413 A CN201410577413 A CN 201410577413A CN 104403648 A CN104403648 A CN 104403648A
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- C09K8/50—Compositions for plastering borehole walls, i.e. compositions for temporary consolidation of borehole walls
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- C09K8/506—Compositions based on water or polar solvents containing organic compounds
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- C09K8/512—Compositions based on water or polar solvents containing organic compounds macromolecular compounds containing cross-linking agents
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Abstract
The invention discloses an oily sludge profile control agent and a preparation method thereof. The oily sludge profile control agent comprises a comb-type polymer KY-6, a first crosslinking agent, a second crosslinking agent, an emulsifier, oily sludge and water. According to the invention, the comb-type polymer KY-6 is taken as the main agent, and the first crosslinking agent, the second crosslinking agent, the emulsifier and the oily sludge are taken as supporting materials, so that the profile control agent finally can have a good crosslinking effect. By utilizing the good compatibility of oily sludge and stratum, the formed profile control agent has strong sealing ability, and salt tolerant and anti-washout ability, can realize high-dose injection and deep profile control, and solves resourceful treatment of oily sludge.
Description
Technical field:
The present invention relates to a kind of oil field amendment and preparation method thereof, particularly a kind of oily sludge base profile modificator and preparation method thereof.
Background technology:
Oily sludge refers to idle oil-containing solids and gunk.Oil field mining liquid, after the art breading such as oil removing, sedimentation, can form one deck dark thick liquid gradually, i.e. oily sludge at the bottom of tank, and its main component is water, silt particle, gum asphalt and wax.Along with China's oil exploitation progressively enters ultra-high water cut stage, along with the use of number of chemical auxiliary agent co-displacement, the output of oily sludge can constantly increase.Oily sludge has that generation is large, oleaginousness is high, mink cell focus component high, wherein except containing a large amount of residual alkane oils also containing cacodorous toxic substances such as benzene homologues, phenols, anthracene, pyrenes; Also contain radioelement in some stratum also along with Produced Liquid extraction, and be deposited in mud; Also containing a large amount of heavy metals such as pathogenic bacteria, parasite, copper, zinc, chromium, mercury in oily sludge.A large amount of oily sludges is bulky, if effectively do not processed, not only takies a large amount of arable land, and all will pollute surrounding soil, water body, air, and there is rubble flow hidden danger.At present, oily sludge is classified as Hazardous wastes by country.The process of oily sludge is also a great problem of puzzlement petroleum and petrochemical industry always, and domestic most oily sludge is deposited in You Qu ground, does not substantially have utility value.
Oil field water injection well in water flooding recovery process generally uses amendment to carry out plugging and profile con-trol to improve water-injection capability.At present, oily sludge is made amendment re-injection underground, both can play shutoff drop ply adjustment intake profile and improve oil displacement efficiency, recycling sludge idle in a large number can have been dealt with brought environmental problem again.But, with the oily sludge profile control system of polymer formation, because oily sludge contains a large amount of oil and salt, make the performance of polymer gel can not reach the requirement of practical application.Therefore, the polymer gel system that screening and optimizing and oily sludge adapt still needs large quantifier elimination.
Summary of the invention:
The present invention proposes a kind of oily sludge base profile modificator and preparation method thereof, amendment has good cross-linking effect and plugging effect, also achieves the recycling of oily sludge, solves environmental problem.
The technical solution adopted in the present invention is:
A kind of oily sludge base profile modificator, 100mL amendment comprises following component:
Comb-shaped polymer KY-6:100-600mg;
First linking agent: comprise urea 1-2.5g and formaldehyde 0.5-2g;
Second linking agent: 2-6mL;
Emulsifying agent: 1-3mL;
Oily sludge: be greater than 0 and be less than or equal to 15g;
Water: surplus;
Described second linking agent is the mixture of citric acid zirconium, chromium trichloride, Tiorco 677 or three; Optimization citric acid zirconium;
Described emulsifying agent is sodium oleate, Sodium dodecylbenzene sulfonate, sodium laurylsulfonate, tween, Span-80, Span-20, OP-10, AOS or its mixture.
Described second linking agent is for selecting citric acid zirconium.
Described emulsifying agent is AOS.
Described comb-shaped polymer KY-6 is 500g.
Described first linking agent comprises urea 2g and formaldehyde 1.5g.
Described second linking agent is 5mL.
Described emulsifying agent is 2mL;
A preparation method for oily sludge base profile modificator, comprises the following steps:
1) configure comb-shaped polymer KY-6 solution, strength of solution is 1000-6000mg/L;
2) the first linking agent, the second linking agent and emulsifying agent is soluble in water respectively, be configured to respective solution, wherein the amount of solvent is as the criterion to dissolve solute;
3) emulsifier solution is mixed with oily sludge, stir, make oily sludge be evenly dispersed in emulsifier solution;
4) comb-shaped polymer KY-6 solution, the first cross-linking agent solution and the second cross-linking agent solution are mixed, make it to become frozen glue state, then regulate frozen glue to be that slightly acidic is to neutral;
5) by step 3) obtain be dispersed in oily sludge in emulsifier solution and step 4) obtained frozen glue mixing is placed on sealing in the water-bath of 50-90 degree Celsius and stirs, until mix, namely obtains amendment.
Described step 4) in regulate frozen glue pH value to be 5-7, be preferably 5.
Described 5) in, the oily sludge be dispersed in emulsifier solution and frozen glue mixing are placed on preferably in 60 C water bath sealing stir, until mix.
The present invention at least has the following advantages:
The present invention with comb-shaped polymer KY-6 for host, and be equipped with the first linking agent, the second linking agent and emulsifying agent and oily sludge, amendment is finally made to have good cross-linking effect, in addition, oily sludge of the present invention derives from underground at first, last again with the form of amendment recurrence underground, with stratum, there is good compatibility.
Accompanying drawing illustrates:
Fig. 1 is the influence curve figure of temperature of the present invention to oily sludge profile control system viscosity;
Fig. 2 is the influence curve figure of temperature of the present invention to oily sludge profile control system gelation time;
Fig. 3 is the influence curve figure of salinity of the present invention to oily sludge profile control system viscosity;
Fig. 4 is the first linking agent and the webbed design sketch of the second linking agent shape in the present invention.
Embodiment:
Below by specific embodiment, formula of the present invention and method are described in detail:
Oily sludge base profile modificator of the present invention comprises: comb-shaped polymer KY-6, the first linking agent, the second linking agent, oily sludge, and emulsifying agent, oily sludge and water.
Polymkeric substance is selected from KY-6, containing 100-600mg, preferred 500g in 100mL amendment;
Second linking agent is the mixture of citric acid zirconium, chromium trichloride, Tiorco 677 or three; Optimization citric acid zirconium, consumption is: in every 100mL amendment, the second cross-linked dosage is 2-6mL, preferred 5mL;
First linking agent is selected from urea and formaldehyde, every 100mL amendment comprise 1-2.5g urea and 0.5-2g formaldehyde, preferred 2g urea and 1.5g formaldehyde;
Emulsifying agent is selected from span-80, span-20, OP-10 (condenses of alkylphenol and oxyethane), AOS (α-sodium olefin sulfonate), sodium oleate, sodium laurylsulfonate, Sodium dodecylbenzene sulfonate, tween or its mixture, it is 2-6% that emulsifying agent accounts for amendment volume ratio, preferably 5%;
In 100mL amendment, the addition of oily sludge is less than or equal to 15g for being greater than 0;
In 100mL amendment, surplus is water.
The preparation method of oily sludge base profile modificator of the present invention is described below in conjunction with specific embodiment:
Embodiment 1
Preparation 100mL amendment, step is as follows:
1) configure comb-shaped polymer KY-6 solution, strength of solution is 100mg/mL;
2) the first linking agent is comprised urea 2.5g and formaldehyde 0.5g, the second linking agent citric acid zirconium 2mL and emulsifying agent sodium oleate 1mL soluble in water respectively, be configured to respective solution, wherein the amount of solvent is as the criterion to dissolve solute;
3) emulsifier solution is mixed with 10g oily sludge, stir, make oily sludge be evenly dispersed in emulsifier solution;
4) comb-shaped polymer KY-6 solution, the first cross-linking agent solution and the second cross-linking agent solution are mixed, make it to become frozen glue state, then regulate frozen glue to be that slightly acidic is extremely neutral, regulate frozen glue pH value to be 5;
5) by step 3) obtain be dispersed in oily sludge in emulsifier solution and step 4) obtained frozen glue mixing is placed on sealing in the water-bath of 50 degrees Celsius and stirs, until mix, namely obtains amendment.
Embodiment 2
Preparation 100mL amendment, step is as follows:
1) configure comb-shaped polymer KY-6 solution, strength of solution is 600mg/mL;
2) the first linking agent is comprised urea 1g and formaldehyde 2g, the second linking agent chromium trichloride 6mL and emulsifier tween 3mL soluble in water respectively, be configured to respective solution, wherein the amount of solvent is as the criterion to dissolve solute;
3) emulsifier solution is mixed with 15g oily sludge, stir, make oily sludge be evenly dispersed in emulsifier solution;
4) comb-shaped polymer KY-6 solution, the first cross-linking agent solution and the second cross-linking agent solution are mixed, make it to become frozen glue state, then regulate frozen glue to be that slightly acidic is extremely neutral, regulate frozen glue pH value to be 7;
5) by step 3) obtain be dispersed in oily sludge in emulsifier solution and step 4) obtained frozen glue mixing is placed on sealing in the water-bath of 60 degrees Celsius and stirs, until mix, namely obtains amendment.
Embodiment 3
Preparation 100mL amendment, step is as follows:
2) the first linking agent is comprised urea 2g and formaldehyde 1.2g, the second linking agent Tiorco 677 4mL and emulsifying agent sodium laurylsulfonate 2mL soluble in water respectively, be configured to respective solution, wherein the amount of solvent is as the criterion to dissolve solute;
3) emulsifier solution is mixed with 3g oily sludge, stir, make oily sludge be evenly dispersed in emulsifier solution;
4) comb-shaped polymer KY-6 solution, the first cross-linking agent solution and the second cross-linking agent solution are mixed, make it to become frozen glue state, then regulate frozen glue to be that slightly acidic is extremely neutral, regulate frozen glue pH value to be 6;
5) by step 3) obtain be dispersed in oily sludge in emulsifier solution and step 4) obtained frozen glue mixing is placed on sealing in the water-bath of 90 degrees Celsius and stirs, until mix, namely obtains amendment.
Embodiment 5
Preparation 100mL amendment, step is as follows:
2) 3mL and emulsifying agent Sodium dodecylbenzene sulfonate 1.5mL is soluble in water respectively altogether the first linking agent to be comprised urea 2g and formaldehyde 1.2g, the second linking agent chromium trichloride and Tiorco 677, be configured to respective solution, wherein the amount of solvent is as the criterion to dissolve solute;
3) emulsifier solution is mixed with 5g oily sludge, stir, make oily sludge be evenly dispersed in emulsifier solution;
4) comb-shaped polymer KY-6 solution, the first cross-linking agent solution and the second cross-linking agent solution are mixed, make it to become frozen glue state, then regulate frozen glue to be that slightly acidic is extremely neutral, regulate frozen glue pH value to be 5;
5) by step 3) obtain be dispersed in oily sludge in emulsifier solution and step 4) obtained frozen glue mixing is placed on sealing in the water-bath of 70 degrees Celsius and stirs, until mix, namely obtains amendment.
Embodiment 6
Preparation 100mL amendment, step is as follows:
2) 3mL and emulsifying agent Sodium dodecylbenzene sulfonate 1.5mL is soluble in water respectively altogether the first linking agent to be comprised urea 2g and formaldehyde 1.2g, the second linking agent chromium trichloride and Tiorco 677, be configured to respective solution, wherein the amount of solvent is as the criterion to dissolve solute;
3) emulsifier solution is mixed with 5g oily sludge, stir, make oily sludge be evenly dispersed in emulsifier solution;
4) comb-shaped polymer KY-6 solution, the first cross-linking agent solution and the second cross-linking agent solution are mixed, make it to become frozen glue state, then regulate frozen glue to be that slightly acidic is extremely neutral, regulate frozen glue pH value to be 5;
5) by step 3) obtain be dispersed in oily sludge in emulsifier solution and step 4) obtained frozen glue mixing is placed on sealing in the water-bath of 70 degrees Celsius and stirs, until mix, namely obtains amendment.
Oily sludge profile control system Evaluation results:
1, temperature on the impact of oily sludge profile control system to oily sludge profile control system 5000mg/LKY-6+2g urea+1.5g formaldehyde+5mL citric acid zirconium+15g oily sludge+2mLAOS, determine this oily sludge profile-controlling and plugging agent respectively at the viscosity of 50 DEG C, 60 DEG C, 70 DEG C, 80 DEG C, 90 DEG C and gelation time, result is as table 1:
Table 1
| Temperature | Gelation time (h) | Viscosity (mPas) |
| 50 | 12 | 8157 |
| 60 | 6.5 | 35010 |
| 70 | 5 | 33660 |
| 80 | 3 | 26030 |
| 90 | 1.5 | 8650 |
As can be seen from Fig. 1 and table 1, this oily sludge profile control system is with the rising of temperature, and viscosity has obvious decline, but under top temperature 90 DEG C of conditions, still can reach the intensity of more than 8000mPas, namely have feasibility.As shown in Figure 2, this oily sludge profile control system is along with the rising of temperature, and gelation time has obvious shortening, but this system can not plastic at normal temperatures, and namely system can not be cross-linked on the ground, therefore also can not affect pumping construction.
2, salinity is on the impact of oily sludge profile control system
As shown in Table 2 and Figure 3, first point in Fig. 3 is the oily sludge profile control system with the preparation of oil field clear water, and last point is the system with oilfield sewage configuration.Find out that salinity is little to the viscosity influence of this system when salinity is below 10000mg/L by Fig. 3, but when salinity is greater than 10000mg/L, system viscosity is extremely acute to decline.Therefore, oil field clear water can be used for preparing this oily sludge profile control system, and sewage is because salinity is too high comparatively large on system impact, therefore can not be used for preparing this profile control system.
Table 2
| Salinity (mg/L) | Gelation time (h) | Viscosity (mPas) |
| 4000 | 2.5 | 28570 |
| 10000 | 5 | 30990 |
| 30000 | 5 | 22110 |
| 45000 | 6 | 13560 |
| 60000 | 7 | 2054 |
3, produced sludge system displacement Evaluation results
Formula mud; Water quality is experimental water; Temperature is 60 DEG C.
(1) Amount of profile control agent is on the impact of water plugging rate and pressure
Table 3
Table 4
As can be seen from above table 3 and table 4, sealing ratiod and the breakthrough pressure after injecting increase with the increase of injection rate, but when injection rate reaches 0.3PV and be above, the change of sealing ratiod is just no longer obvious, sealing ratiod all reaches more than 99%, and breakthrough pressure all brings up to more than 10MPa.Therefore, the best slug consumption selecting amendment is 0.3PV.With comb-shaped polymer KY-6 for host, and be equipped with the first linking agent, the second linking agent and emulsifying agent and oily sludge, finally make amendment have good cross-linking effect as shown in Figure 4.
Oily sludge originates in stratum, this feature makes it and stratum have good compatibleness, therefore be basic raw material with oily sludge, adopt chemical treatment method, add the additives such as appropriate suspension agent, linking agent and just can be deployed into the micron-sized O/W type emulsified suspension amendment good with stratum compatibleness with oily sludge.
Oily sludge natural degradation and natural difficulties in dispersion, after forcing dilution dispersion, greasy filth layering is serious, cannot pumping.Take oily sludge as basic raw material, adopt chemical treatment method, effectively utilize mud component, the oil ingredient in mud, add appropriate additive, the solid particulate wherein of suspending, oil ingredient is uniformly dispersed, form homogeneous, stable milk sap, be convenient to pumping, easily enter stratum.
Emulsifying agent has good dissemination, and adding of emulsifying agent can make oily sludge be uniformly dispersed, and can reduce the interfacial tension of oily sludge, prevents the aggregate forming oil, mud, water, makes oily sludge form even, stable dispersion liquid.
The present invention has following features:
(1) comb-shaped polymer KY-6 is the polymkeric substance of optimum produced sludge system, has well disperse compatibleness with mud.
(2) Precondensed UreaFormaldehyde Resin is linking agent; And optimized that Niao Su ﹕ formaldehyde mass ratio is 2 ﹕ 1.5 respectively, citric acid zirconium dosage is 5, pH between 4 ~ 6, when oily sludge dosage is 5 ~ 15g, cross-linking effect is best.
(3) host agent prescription obtaining oily sludge profile control system by the final screening of orthogonal test experiment is:
5000mg/LKY-6+2g urea+1.5g formaldehyde+5mL citric acid zirconium+15g oily sludge+2mLAOS
(4) by testing the temperature resistance of oily sludge profile-controlling and plugging agent, anti-salt, can draw, this oily sludge profile-controlling and plugging agent has good cross-linking effect 60 DEG C ~ 80 DEG C time, and still formed crosslinked when salinity is 30000mg/L, viscosity reaches more than 20000mPas.Rock core displacement test show when amendment enter amount reach 0.3PV and above time, sealing ratiod all reaches more than 99%.
Claims (10)
1. an oily sludge base profile modificator, is characterized in that 100mL amendment comprises following component:
Comb-shaped polymer KY-6:100-600mg;
First linking agent: comprise urea 1-2.5g and formaldehyde 0.5-2g;
Second linking agent: 2-6mL;
Emulsifying agent: 1-3mL;
Oily sludge: be greater than 0 and be less than or equal to 15g;
Water: surplus;
Described second linking agent is the mixture of citric acid zirconium, chromium trichloride, Tiorco 677 or three; Optimization citric acid zirconium;
Described emulsifying agent is sodium oleate, Sodium dodecylbenzene sulfonate, sodium laurylsulfonate, tween, Span-80, Span-20, OP-10, AOS or its mixture.
2. oily sludge base profile modificator as claimed in claim 1, is characterized in that: described second linking agent is citric acid zirconium.
3. oily sludge base profile modificator as claimed in claim 1, is characterized in that: described emulsifying agent is AOS.
4. oily sludge base profile modificator as claimed in claim 1, is characterized in that: described comb-shaped polymer KY-6 is 500g.
5. oily sludge base profile modificator as claimed in claim 1, is characterized in that: described first linking agent comprises urea 2g and formaldehyde 1.5g.
6. oily sludge base profile modificator as claimed in claim 1, is characterized in that: described second linking agent is 5mL.
7. oily sludge base profile modificator as claimed in claim 1, is characterized in that: described emulsifying agent is 2mL.
8. a preparation method for the oily sludge base profile modificator described in claim 1-7, is characterized in that comprising the following steps:
1) configure comb-shaped polymer KY-6 solution, strength of solution is 1000-6000mg/L;
2) the first linking agent, the second linking agent and emulsifying agent is soluble in water respectively, be configured to respective solution, wherein the amount of solvent is as the criterion to dissolve solute;
3) emulsifier solution is mixed with oily sludge, stir, make oily sludge be evenly dispersed in emulsifier solution;
4) comb-shaped polymer KY-6 solution, the first cross-linking agent solution and the second cross-linking agent solution are mixed, make it to become frozen glue state, then regulate frozen glue to be that slightly acidic is to neutral;
5) by step 3) obtain be dispersed in oily sludge in emulsifier solution and step 4) obtained frozen glue mixing is placed on sealing in the water-bath of 50-90 degree Celsius and stirs, until mix, namely obtains amendment.
9. the preparation method of oily sludge base profile modificator according to claim 8, is characterized in that: described step 4) in regulate frozen glue pH value to be 5-7, be preferably 5.
10. the preparation method of oily sludge base profile modificator according to claim 8, is characterized in that: described 5), the oily sludge be dispersed in emulsifier solution and frozen glue mixing are placed on preferably in 60 C water bath sealing stir, until mix.
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| CN105038746A (en) * | 2015-06-25 | 2015-11-11 | 西安石油大学 | Preparation method of jelly-type oily sludge profile control agent |
| CN105112033A (en) * | 2015-08-21 | 2015-12-02 | 中国石油天然气股份有限公司 | Plugging control agent prepared by oil residues or oily sewage and preparation method thereof |
| CN106007296A (en) * | 2016-07-22 | 2016-10-12 | 中国石油集团川庆钻探工程有限公司工程技术研究院 | Oily sludge treatment method |
| CN106967400A (en) * | 2017-03-08 | 2017-07-21 | 中国石油天然气股份有限公司 | A kind of slug formula oily sludge base profile modificator and profile control method and application |
| CN110105937A (en) * | 2019-04-18 | 2019-08-09 | 中国石油大学(华东) | Frozen glue dispersion strengthens ontology jelly system and preparation method thereof with sludge |
| CN110591677A (en) * | 2019-06-25 | 2019-12-20 | 河北科技大学 | Cross-linking agent of polyacrylamide water shutoff agent, preparation method and application thereof |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105038746A (en) * | 2015-06-25 | 2015-11-11 | 西安石油大学 | Preparation method of jelly-type oily sludge profile control agent |
| CN105112033A (en) * | 2015-08-21 | 2015-12-02 | 中国石油天然气股份有限公司 | Plugging control agent prepared by oil residues or oily sewage and preparation method thereof |
| CN105112033B (en) * | 2015-08-21 | 2017-12-01 | 中国石油天然气股份有限公司 | One kind utilizes plugging agent and preparation method thereof made of the dregs of fat or oily sludge |
| CN106007296A (en) * | 2016-07-22 | 2016-10-12 | 中国石油集团川庆钻探工程有限公司工程技术研究院 | Oily sludge treatment method |
| CN106007296B (en) * | 2016-07-22 | 2019-02-19 | 中国石油集团川庆钻探工程有限公司工程技术研究院 | A kind of processing method of oily sludge |
| CN106967400A (en) * | 2017-03-08 | 2017-07-21 | 中国石油天然气股份有限公司 | A kind of slug formula oily sludge base profile modificator and profile control method and application |
| CN110105937A (en) * | 2019-04-18 | 2019-08-09 | 中国石油大学(华东) | Frozen glue dispersion strengthens ontology jelly system and preparation method thereof with sludge |
| CN110591677A (en) * | 2019-06-25 | 2019-12-20 | 河北科技大学 | Cross-linking agent of polyacrylamide water shutoff agent, preparation method and application thereof |
| CN110591677B (en) * | 2019-06-25 | 2021-12-17 | 河北科技大学 | Cross-linking agent of polyacrylamide water shutoff agent, preparation method and application thereof |
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