CN1670121A - Multifunctional - Google Patents
Multifunctional Download PDFInfo
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- CN1670121A CN1670121A CN 200510042592 CN200510042592A CN1670121A CN 1670121 A CN1670121 A CN 1670121A CN 200510042592 CN200510042592 CN 200510042592 CN 200510042592 A CN200510042592 A CN 200510042592A CN 1670121 A CN1670121 A CN 1670121A
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- fluid additive
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Abstract
The invention discloses a multifunctional drilling fluid additive. By 100 weight percentages, the components are: 10~30 wt. paraffin, 10~30 wt. white oil, 5~15 wt. non-ionic surface active agent, 0.02~5 wt. cationic surface active agent and water. The invention also discloses the method for preparation of the drilling fluid additive: mixing the paraffin and white oil into oil phase; mixing the non-ionic surface active agent and cationic surface active agent into mixed surface active agent; adding the oil phase and mixed surface active agent into the reactor, heating; then adding proper volume preheating water into the reactor till opaque viscous gel phase occurring in the architecture; agitating with rotary speed of 2000~3000rpm and keep the emulsifying temperature during reaction; adding the rest of water into the reactor and stop heating, agitating with 1000rpm, make the emulsion cool down to ambient temperature and get the paraffin pinpoint emulsion.
Description
Technical field
The present invention relates to a kind of drilling fluid additive that is used for petroleum drilling engineering and preparation method thereof and application.
Background technology
In petroleum drilling engineering, drilling fluid is absolutely necessary.It can play the landwaste that carries and suspend, stabilizing borehole and equilibrium strata pressure, and cooling and lubricated drill bit, drilling tool transmit effects such as water power, and the quality of property of drilling fluid directly influences the wellbore quality and the drilling speed of drilling well.For this reason, must add in drilling fluid that multiple treatment agent improves and stable property of drilling fluid, and regulate and safeguard drilling fluid at any time, make the performance of drilling fluid meet the requirement of stratum and drilling technology.
Drilling fluid can be divided into oil base drilling fluid, water-base drilling fluid, and gaseous type drilling fluid and synthetic base drilling fluid, wherein, water-base drilling fluid occupy dominant position always.Water-base drilling fluid medium clay soil particle has a large amount of negative electricity, and this is very stable for drilling fluid itself, but has been exactly a kind of labile factor for the stratum that contacts with system and the borehole wall.Because every factor that can make clay dispersion also must cause the hydration swelling and the dispersion of stratum and borehole wall medium clay soil soil mineral.In order to solve this contradiction, MMH (aluminium, magnesium mixed metal hydroxides) positive colloid additive and the organic positive colloid additive of black have appearred in recent years.But shortcomings such as it is strong inadequately that the MMH positive colloid has the inhibition of mud stone, and the drilling fluid 10-minute gel strength is too high, and filter loss is bigger than normal, and compatible treatment agent is few, and rheological property is wayward.The organic positive colloid of black is protected the performance of hydrocarbon zone to have than MMH positive colloid and is increased substantially, but owing to itself fluorescence is arranged, influences well logging, and have environmental pollution problems, has limited its further development and application to a great extent.
Summary of the invention
At the deficiencies in the prior art, the problem to be solved in the present invention provides a kind of multifunctional drilling fluid additive and preparation method thereof and application, utilize additive of the present invention good restraining clay dispersion and stabilizing borehole simultaneously, has stronger lubrication, and the preparation method is simple to operate, and the milk sap particle diameter of preparation is tiny, narrow particle size distribution, good stability, and can save heat energy.
The multifunctional drilling fluid additive that the present invention relates to, in 100 weight parts, form by following component:
Paraffin 10-30 part, white oil 10-30 part, nonionic surface active agent 5-15 part, cationic surfactant 0.02-5 part, surplus is a water.
Wherein, described nonionogenic tenside is polyethenoxy ether class nonionogenic tenside or polyol ester class nonionogenic tenside or its combination, and cats product is a quaternary cationic surfactant.
Above-mentioned polyethenoxy ether class nonionogenic tenside selects one of Tween series of surfactants; Described polyol ester class nonionogenic tenside selects one of Span series of surfactants; Described quaternary cationic surfactant selects the alkyl trimethyl ammonium bromide of carbon chain lengths 12-16 or selects the alkyl trimethyl ammonium chloride of carbon chain lengths 12-16.
The preferred Tween20 of above-mentioned Tween series of surfactants, Tween40, Tween60, one of Tween80, Tween100; The preferred Span20 of above-mentioned Span series of surfactants, Span40, Span60, one of Span80, Span100.
Above-mentioned additive is a milk sap, and median size is 120nm～400nm.
The preparation method of multifunctional drilling fluid additive of the present invention, be made up of following steps:
(1) in weight ratio, with paraffin: white oil is by 1: 3～3: 1 mixed, as oil phase;
(2) in weight ratio, with nonionogenic tenside: cats product is made mixed surfactant by 20: 1～3: 2 mixed;
(3) in weight ratio, with above-mentioned oil phase: mixed surfactant adds in the reactor jointly in 6: 1～2: 1 ratio, milk sap, be heated to 70 ℃～90 ℃;
(4) in weight ratio, with the water additional heat may to 60 that relates in the component ℃～80 ℃;
(5) water after the above-mentioned heating is added in the reactor of step (3), add-on to above-mentioned system occurs till the opaque viscous gel phase;
(6) with the system 10～15min of 2000～3000rpm whipping step (3), keeping temperature is 70 ℃～90 ℃;
(7) step (5) remainder water is added in the above-mentioned reactor, stop heating,, continue the milk sap 10～15min of whipping step (6), when treating that fluid temperature is reduced to room temperature, stop to stir, promptly obtain paraffin wax microemulsions again with 1000～1500rpm.
Wherein, the described paraffin of step (1): the ratio of white oil preferably 2: 3～2: 1; The described nonionogenic tenside of step (2): the ratio of cats product preferably 9: 1～2: 1; The described oil phase of step (3): the ratio of mixed surfactant preferably 5: 1～3: 1.
Above-mentioned, the described paraffin of step (1): the ratio of white oil most preferably is 1: 1; The described nonionogenic tenside of step (2): the ratio of cats product most preferably is 4～5: 1; The described oil phase of step (3): the ratio of mixed surfactant most preferably is 4: 1.
Wherein, the described emulsifying temperature of step (6) is preferably 80-85 ℃.
The application of multifunctional drilling fluid additive of the present invention in preparation well drilling industry shale control agent, lubricant, oil layer protective agent.
Utilize the multifunctional drilling fluid additive of method preparation of the present invention, outward appearance is an oyster white or translucent, narrow particle size distribution, the polydispersion factor is less than 0.2, median size is at 120-400nm, and water dispersible is an one-level, has property of drilling fluid preferably, the paraffin wax microemulsions particle diameter is tiny and even in addition, by having good stability.
Its stable characteristics are as follows:
1. stability in storage: place outward appearance no change half a year, do not have obvious layering and flocculation phenomenon;
2. mechanical stability: under the 3000rpm condition, centrifugal 30 minutes to 1 hour, emulsion was not stratified;
3. temperature stability: in-17 ℃ of freezing weeks, taking-up can be thawed naturally, and emulsion property does not have considerable change.
The paraffin wax microemulsions of method preparation of the present invention is a kind of good multifunction additive in well drilling industry.The said products that adds a small amount of (2-3% weight percent) in drilling fluid promptly can obviously play and suppress shale expansion and clay dispersion, stabilizing borehole, protection oil reservoir and lubricated effect.Compare with the MMH positive colloid, paraffin wax microemulsions has better lubricated and protection oil reservoir effect, and performance gentleness in use; Compare with the organic positive colloid of black, paraffin wax microemulsions is originally as white, and no fluorescence does not influence well logging, and nontoxicity and environmental pollution; Both had the advantage that MMH positive electricity glues together the organic positive colloid of black, overcome their weak point again, belonged to eco-friendly drilling fluid additive, had broad application prospects.
The method for preparing the multifunctional drilling fluid additive that the present invention relates to is simple to operate, realizes easily, and can save heat energy, reduces cost, and meets environmental protection and every industrial requirements.
Description of drawings
Fig. 1 linear expansion experiment: pure water, 3% paraffin wax microemulsions contrast with 8 hours expansion altitude curves of the KCl solution of different concns.
Fig. 2 shale reclaims experiment: the paraffin wax microemulsions of pure water, different concns contrasts with the shale rate of recovery result of 7% KCl solution.
Fig. 3 lubrication experiment: the lubricity contrast of paraffin wax microemulsions and mineral oil.
Embodiment
Embodiment 1:
The multifunctional drilling fluid additive is a milk sap, and median size is at 220-400nm, and component is as follows, is weight part, and total amount is 100 parts:
15 parts in paraffin, 15 parts of white oils, 2 parts of nonionic surface active agent Tween80,2 parts of nonionic surface active agent Span80,1 part of cationic surfactant cetyl trimethylammonium bromide, 65 parts in water.
The preparation method:
By 15 parts in paraffin and white oil are mixed into oil phase for 15 parts; With the mixed system of 1 part of 2 parts of 2 parts of nonionogenic tenside Tween80, Span80 and cats product cetyl trimethylammonium bromide is mixed surfactant; Oil phase and mixed surfactant are added in the reactor, be heated to 80 ℃; Water is heated to 70 ℃; Water that preheating is good adds reactor, add-on to system occur opaque viscous gel mutually till (being that milk sap changes the O/W type into by w/o type), 2000-3000rpm stirs 10min, the maintenance emulsifying temperature is 80 ℃ in the reaction process; Excess water is added reactor, stop heating, reduce stirring velocity simultaneously, continue to stir 10min, make the milk sap cool to room temperature, stop to stir, obtain paraffin wax microemulsions to 1000rpm.
Prepare paraffin wax microemulsions (being abbreviated as WME) according to preparation method as previously mentioned, investigate its mechanical stability and stability in storage respectively, the result is as shown in table 1.
Mechanical stability: centrifugal 30min under the TGL-16G type whizzer 3000rpm rotating speed, leave standstill and observe whether layering.
The experimental data of relevant stability is as follows:
| Finish is than (w/w) | ????6∶1 |
| Emulsion appearance | Oyster white is opaque |
| Mechanical stability | Centrifugal back is not stratified |
| Stability in storage | Place first quarter moon and begin layering |
| Initial median size/nm | ????300-400 |
The experiment of the ability of the multifunctional drilling fluid additive inhibition clay swelling that the present invention relates to is as follows:
Adopt linear expansion and shale to reclaim and investigate paraffin wax microemulsions suppresses clay swelling as drilling fluid additive ability.
1, linear expansion: take by weighing the calcareous polynite that 10.00g handled, on tabletting machine, keep 5min and make sample strip with 10Mpa pressure, measure the linear expansion height in the immersion process again with joining 20mL solution soaking and on NP-01 shale expansion instrument, instrument writes down expansion highly over time automatically, and minute is 8 hours.The swell increment of clay is more little, and the ability that sample suppresses clay swelling is strong more.The result as shown in Figure 1.
2, shale reclaims: after shale is pulverized, cross the 10-20 mesh sieve.Take by weighing the shale (m after about 20g sieves
1), place fill join the withstand voltage digestion tank of solution, be positioned over after the sealing in the 6H-III roller stove baking oven, rolled 16 hours 70 ℃ of following heat.After treating naturally cooling, the shale in the digestion tank is crossed 40 mesh sieves.Again with the shale drying on the gained sieve, (m weighs
2).
The shale rate of recovery=(m
2/ m
1) * 100%.The shale rate of recovery is high more, and it is strong more that sample suppresses shale dispersive ability.The result as shown in Figure 2.
The lubricity experiment of multifunctional drilling fluid additive of the present invention is as follows:
Make certain density base slurry earlier, ageing added emulsion by certain proportioning after 16 hours, and height stirs back ageing 16 hours, with GNF-1 type High Temperature High Pressure adherometer, measured at a certain temperature.F is more little for sticking coefficient, and oilness is good more.The results are shown in Figure 3.
F=M * 0.845 * 10
-2F is a sticking coefficient, and M is moment of torsion (Nm)
Embodiment 2:
As described in embodiment 1, different is:
The multifunctional drilling fluid additive is a milk sap, and median size is at 150-300nm, and component is as follows, is weight part, and total amount is 100 parts:
20 parts in paraffin, 20 parts of white oils, 4.5 parts of nonionic surface active agent Tween20,4.5 parts of Span80,1 part of cationic surfactant palmityl trimethyl ammonium chloride, 50 parts in water.
The experimental data of relevant stability is as follows:
| Finish is than (w/w) | ????4∶1 |
| Emulsion appearance | The little blueing light of oyster white |
| Mechanical stability | Centrifugal back is not stratified |
| Stability in storage | Place not layering half a year |
| Initial median size/nm | ????150-220 |
Embodiment 3:
Of embodiment 1,2, different is:
The multifunctional drilling fluid additive is a milk sap, and median size is at 120-400nm, and component is as follows, is weight part, and total amount is 100 parts:
20 parts in paraffin, 10 parts of white oils, 3.5 parts of nonionic surface active agent Tween80,4.5 parts of Span60,2 parts of cationic surfactant Tetradecyl Trimethyl Ammonium Bromide, 60 parts in water.
The experimental data of relevant stability is as follows:
| Finish is than (w/w) | ????3∶1 |
| Emulsion appearance | The little blueing light of oyster white |
| Mechanical stability | Centrifugal back is not stratified |
| Stability in storage | Place not layering half a year |
| Initial median size/nm | About 100 |
Claims (10)
1. multifunctional drilling fluid additive, in 100 weight parts, form by following component:
Paraffin 10-30 part, white oil 10-30 part, nonionic surface active agent 5-15 part, cationic surfactant 0.02-5 part, surplus is a water.
2. multifunctional drilling fluid additive as claimed in claim 1, it is characterized in that, described nonionogenic tenside is polyethenoxy ether class nonionogenic tenside or polyol ester class nonionogenic tenside or its combination, and cats product is a quaternary cationic surfactant.
3. multifunctional drilling fluid additive as claimed in claim 2 is characterized in that, described polyethenoxy ether class nonionogenic tenside selects one of Tween series of surfactants; Described polyol ester class nonionogenic tenside selects one of Span series of surfactants; Described quaternary cationic surfactant selects alkyl trimethyl ammonium bromide or the alkyl trimethyl ammonium chloride of carbon chain lengths 12-16.
4. multifunctional drilling fluid additive as claimed in claim 3 is characterized in that, described Tween series of surfactants is one of Tween20, Tween40, Tween60, Tween80, Tween100; Described Span series of surfactants is one of Span20, Span40, Span60, Span80, Span100.
5. as claim 1,2,3 or 4 described multifunctional drilling fluid additives, it is characterized in that described additive is a milk sap, median size is 120nm～400nm.
6. the preparation method of the described multifunctional drilling fluid additive of claim 1, be made up of following steps:
(1) in weight ratio, with paraffin: white oil is by 1: 3～3: 1 mixed, as oil phase;
(2) in weight ratio, with nonionogenic tenside: cats product is made mixed surfactant by 20: 1～3: 2 mixed;
(3) in weight ratio, with above-mentioned oil phase: mixed surfactant adds in the reactor jointly in 6: 1～2: 1 ratio, milk sap, be heated to 70 ℃～90 ℃;
(4) in weight ratio, with the water additional heat may to 60 that relates in the component ℃～80 ℃;
(5) water after the above-mentioned heating is added in the reactor of step (3), add-on to above-mentioned system occurs till the opaque viscous gel phase;
(6) with the system 10～15min of 2000～3000rpm whipping step (3), keeping temperature is 70 ℃～90 ℃;
(7) step (5) remainder water is added in the above-mentioned reactor, stop heating,, continue the milk sap 10～15min of whipping step (6), when treating that fluid temperature is reduced to room temperature, stop to stir, promptly obtain paraffin wax microemulsions again with 1000～1500rpm.
7. the preparation method of multifunctional drilling fluid additive as claimed in claim 6 is characterized in that, the described paraffin of step (1): the ratio of white oil is 2: 3～2: 1; The described nonionogenic tenside of step (2): the ratio of cats product is 9: 1～2: 1; The described oil phase of step (3): the ratio of mixed surfactant is 5: 1～3: 1.
8. the preparation method of multifunctional drilling fluid additive as claimed in claim 7 is characterized in that, the described paraffin of step (1): the ratio of white oil is 1: 1; The described nonionogenic tenside of step (2): the ratio of cats product is 4～5: 1; The described oil phase of step (3): the ratio of mixed surfactant is 4: 1.
9. the preparation method of multifunctional drilling fluid additive as claimed in claim 6 is characterized in that, the described emulsifying temperature of step (6) is 80-85 ℃.
10. claim 1,2, the application of 3 or 4 described multifunctional drilling fluid additives in preparation well drilling industry shale control agent, lubricant, oil layer protective agent.
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|---|---|---|---|
| CNB2005100425924A CN1302085C (en) | 2005-03-25 | 2005-03-25 | Multifunctional |
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|---|---|---|---|
| CNB2005100425924A CN1302085C (en) | 2005-03-25 | 2005-03-25 | Multifunctional |
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| CN1302085C CN1302085C (en) | 2007-02-28 |
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