CN103074042B - The preparation method of a kind of drilling fluid and a kind of drilling fluid - Google Patents
The preparation method of a kind of drilling fluid and a kind of drilling fluid Download PDFInfo
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- CN103074042B CN103074042B CN201310042809.6A CN201310042809A CN103074042B CN 103074042 B CN103074042 B CN 103074042B CN 201310042809 A CN201310042809 A CN 201310042809A CN 103074042 B CN103074042 B CN 103074042B
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Abstract
The invention discloses the preparation method of a kind of drilling fluid and a kind of drilling fluid, the water of consisting of of drilling fluid provided by the invention: N gram, N is positive number; The anhydrous sodium carbonate of 0.001N gram; The sodium hydroxide of 0.001N gram; The water retaining of 0.005N gram-0.01N gram; The tackifier of 0.005N gram-0.01N gram; The whipping agent of 0.001N gram-0.004N gram; The suds-stabilizing agent of 0.001N gram-0.004N gram.Drilling fluid provided by the invention can solve existing nitrogen foam and foam leakage-stop liquid, and to there is cost high, and density refractory adjusts, and is not suitable for the problem on multiple pressure Force system stratum.
Description
Technical field
The present invention relates to the oilfield drilling technical field of petroleum industry, particularly relate to the preparation method of a kind of drilling fluid and a kind of drilling fluid.
Background technology
Drilling fluid is for one of equilibrium strata pressure, the safe indispensable material crept into smoothly of guarantee in drilling process.In drilling process, when reservoir pressure is less than fluid column pressure, there will be the working fluids such as drilling fluid, well finishing liquid, workover fluid and to bleed in a large number the leakage phenomenon on stratum.Leakage can cause down-hole accident or complexcase, causes the engineering time to extend, and operating cost increases, or even Oil/gas Well is scrapped, and then causes the serious wasting of resources and tremendous economic loss.At present, most of oil gas field is in mid-later development phase, leakage is on the rise, bore in oil-gas exploration and development process and meet leakage stratum, well can not balance formation fluid pressure, and cause blowout or hole collapse, drilling fluid leakage will make to creep into smoothly and run into many difficulties, cause drilling cost to roll up, even Oil/gas Well is scrapped, cannot normally shaft building.
To bleed stratum to prevent drilling fluid, or can successful shutoff leakage channel rapidly after leakage occurs, recover as early as possible to creep into, plugging agent is one of attested effective treatment agent that can prevent formation leakage, but plugging agent particle and blocking radius difficulty are determined, easily injure reservoir, for the stratum of many cover pressure systems, use plugging agent and foam class drilling fluid effect poorer, not can solve the drilling fluid leakage problem in drilling well.Nitrogen foam and foam can solve formation leakage problem to a certain extent.But it is many that nitrogen foam also exists that cost is high, equipment is employed at scene, and there is Auto-regulating System of Density of Heavy Medium difficulty in foam, to the problem such as multiple pressure Force system stratum is inapplicable, these deficiencies limit its application in exploratory development.
In sum, it is high to there is cost in existing nitrogen foam and foam leakage-stop liquid, and density refractory adjusts, and is not suitable for the problem on multiple pressure Force system stratum.
Summary of the invention
The invention provides a kind of drilling fluid, this drilling fluid can solve existing nitrogen foam and foam leakage-stop liquid, and to there is cost high, and density refractory adjusts, and is not suitable for the problem on multiple pressure Force system stratum.
Present invention also offers a kind of method preparing drilling fluid, the drilling fluid that the method is prepared can solve existing nitrogen foam and foam leakage-stop liquid, and to there is cost high, and density refractory adjusts, and is not suitable for the problem on multiple pressure Force system stratum.
For achieving the above object, technical scheme of the present invention is achieved in that
The invention provides a kind of drilling fluid, consisting of of described drilling fluid:
The water of N gram, N is positive number;
The anhydrous sodium carbonate of 0.001N gram;
The sodium hydroxide of 0.001N gram;
The water retaining of 0.005N gram-0.01N gram;
The tackifier of 0.005N gram-0.01N gram;
The whipping agent of 0.001N gram-0.004N gram;
The suds-stabilizing agent of 0.001N gram-0.004N gram.
In above-mentioned drilling fluid, described drilling fluid also comprise in following treatment agent one or more:
The clay inhibitor of 0.03N gram-0.05N gram;
The temperature stabilising agent of 0.01N gram-0.03N gram;
The sterilant of 0.001N gram-0.003N gram.
In above-mentioned drilling fluid, described water retaining comprise in following treatment agent one or more: carboxymethyl starch, Polyanionic Cellulose;
And/or,
Described tackifier comprise in following treatment agent one or more: the multipolymer of xanthan gum, hydroxypropyl guar, acrylate; Or, described tackifier comprise oxygen scavenger and following one or more: the multipolymer of xanthan gum, hydroxypropyl guar, acrylate;
And/or,
Described whipping agent comprise in following treatment agent one or more: sodium laurylsulfonate, polyoxethylene octylphenyl phenol ether, OA-12, dodecyl sulphate tri ethanol ammonium salt;
And/or,
Described suds-stabilizing agent comprise in following treatment agent one or more: trolamine, ethanol, lauryl alcohol;
And/or,
Described clay inhibitor comprise in following treatment agent one or both: Repone K, small cation;
And/or,
Described temperature stabilising agent comprise in following treatment agent one or more: low-molecular(weight)polymer stablizer, Molecularly Imprinted Polymer stablizer, sulfonated phenol formaldehyde resin and modifier thereof, chromate, sulfonated lignite modifier, organic sulfonated polymer class;
And/or,
Described sterilant comprise in following treatment agent one or more: glutaraldehyde, acetic acid, Peracetic Acid, lactic acid, propionic acid.
In above-mentioned drilling fluid, described water retaining comprises: carboxymethyl starch and Polyanionic Cellulose; Wherein, the mass ratio of carboxymethyl starch and Polyanionic Cellulose is a:1; The span of a is 3 ~ 5;
And/or,
Described tackifier comprise: xanthan gum, hydroxypropyl guar and oxygen scavenger; Wherein, the mass ratio of xanthan gum, hydroxypropyl guar and oxygen scavenger is b:c:5; The span of b is the span of 2 ~ 4, c is 3 ~ 1;
And/or,
Described whipping agent comprises: sodium laurylsulfonate, polyoxethylene octylphenyl phenol ether, OA-12 and dodecyl sulphate tri ethanol ammonium salt; Wherein, the mass ratio of sodium laurylsulfonate, polyoxethylene octylphenyl phenol ether, OA-12 and dodecyl sulphate tri ethanol ammonium salt is d:1:1:1; The span of d is 1 ~ 3;
And/or,
Described suds-stabilizing agent comprises: trolamine, ethanol and lauryl alcohol; Wherein, the mass ratio of trolamine, ethanol and lauryl alcohol is 1:1:e; The span of e is 1 ~ 2.
In above-mentioned drilling fluid, consisting of in this drilling fluid:
The water of N gram, N is positive number;
The anhydrous sodium carbonate of 0.001N gram;
The sodium hydroxide of 0.001N gram;
The water retaining of 0.005N gram; In this water retaining, the mass ratio of carboxymethyl starch and Polyanionic Cellulose is 3:1;
The tackifier of 0.005N gram; In these tackifier, the mass ratio of xanthan gum, hydroxypropyl guar and oxygen scavenger is 2:3:5;
The whipping agent of 0.001N gram, in this whipping agent, the mass ratio of sodium laurylsulfonate, polyoxethylene octylphenyl phenol ether, OA-12 and dodecyl sulphate tri ethanol ammonium salt is 1:1:1:1;
The suds-stabilizing agent of 0.001N gram, in this suds-stabilizing agent, the mass ratio of trolamine, ethanol and lauryl alcohol is 1:1:1;
The clay inhibitor of 0.03N gram, this clay inhibitor is Repone K;
The temperature stabilising agent of 0.01N gram, this temperature stabilising agent is low-molecular(weight)polymer stablizer;
The sterilant of 0.001N gram, this sterilant is glutaraldehyde.
In above-mentioned drilling fluid, consisting of in this drilling fluid:
The water of N gram, N is positive number;
The anhydrous sodium carbonate of 0.001N gram;
The sodium hydroxide of 0.001N gram;
The water retaining of 0.006N gram; In this water retaining, the mass ratio of carboxymethyl starch and Polyanionic Cellulose is 4:1;
The tackifier of 0.008N gram; In these tackifier, the mass ratio of xanthan gum, hydroxypropyl guar and oxygen scavenger is 3:2:5;
The whipping agent of 0.002N gram, in this whipping agent, the mass ratio of sodium laurylsulfonate, polyoxethylene octylphenyl phenol ether, OA-12 and dodecyl sulphate tri ethanol ammonium salt is 2:1:1:1;
The suds-stabilizing agent of 0.002N gram, in this suds-stabilizing agent, the mass ratio of trolamine, ethanol and lauryl alcohol is 1:1:2;
The clay inhibitor of 0.04N gram, this clay inhibitor is Repone K;
The temperature stabilising agent of 0.02N gram, this temperature stabilising agent is low-molecular(weight)polymer stablizer;
The sterilant of 0.002N gram, this sterilant is glutaraldehyde.
In above-mentioned drilling fluid, consisting of in this drilling fluid:
The water of N gram, N is positive number;
The anhydrous sodium carbonate of 0.001N gram;
The sodium hydroxide of 0.001N gram;
The water retaining of 0.008N gram; In this water retaining, the mass ratio of carboxymethyl starch and Polyanionic Cellulose is 5:1;
The tackifier of 0.01N gram; In these tackifier, the mass ratio of xanthan gum, hydroxypropyl guar and oxygen scavenger is 4:1:5;
The whipping agent of 0.003N gram, in this whipping agent, the mass ratio of sodium laurylsulfonate, polyoxethylene octylphenyl phenol ether, OA-12 and dodecyl sulphate tri ethanol ammonium salt is 3:1:1:1;
The suds-stabilizing agent of 0.003N gram, in this suds-stabilizing agent, the mass ratio of trolamine, ethanol and lauryl alcohol is 1:1:2;
The clay inhibitor of 0.05N gram, this clay inhibitor is Repone K;
The temperature stabilising agent of 0.03N gram, this temperature stabilising agent is low-molecular(weight)polymer stablizer;
The sterilant of 0.003N gram, this sterilant is glutaraldehyde.
In above-mentioned drilling fluid, moisture content≤5% of described water retaining;
And/or,
Moisture content≤15% of described tackifier;
And/or,
Base fluid froth quality >=20% of described whipping agent;
And/or,
Volume compressibility >=15% of described suds-stabilizing agent.
In above-mentioned drilling fluid, the method comprises:
The suds-stabilizing agent of the anhydrous sodium carbonate of 0.001N gram, the sodium hydroxide of 0.001N gram, the water retaining of 0.005N gram-0.01N gram, the tackifier of 0.005N gram-0.01N gram, the whipping agent of 0.001N gram-0.004N gram, 0.001N gram-0.004N gram is added while stirring in N gram of water.
In the above-mentioned methods, the method also comprises: add in following component in described drilling fluid while stirring one or more:
The clay inhibitor of 0.03N gram-0.05N gram; The temperature stabilising agent of 0.01N gram-0.03N gram; The sterilant of 0.001N gram-0.003N gram.
In sum, drilling fluid provided by the invention is mainly used as leak-proof leak-stopping when leakage stratum is crept into, and it has the effect of filtrate reducing, lubrication concurrently simultaneously; Drilling fluid provided by the invention overcomes the shortcoming that nitrogen foam configuration device is numerous and jumbled, foam density controls difficulty, dosing apparatus is simple and easy, density adjusts easy advantage, drilling fluid provided by the invention solves the problem that leakage easily occurs in low pressure and leakmess formation drilling process, effectively can improve the bearing capacity on stratum.
Accompanying drawing explanation
Fig. 1 is the schema of the collocation method of a kind of drilling fluid in the present invention.
Embodiment
For making the object, technical solutions and advantages of the present invention clearly, below in conjunction with accompanying drawing, embodiment of the present invention is described further in detail.
In order to achieve the above object, technical scheme of the present invention is achieved in that
Fig. 1 is the schema of the collocation method of a kind of drilling fluid in the present invention.As shown in Figure 1,
Step 101, at the water of N gram, N is positive number; Add the anhydrous sodium carbonate of 0.001N gram while stirring successively; The sodium hydroxide of 0.001N gram; The water retaining of 0.005N gram-0.01N gram; The tackifier of 0.005N gram-0.01N gram; The whipping agent of 0.001N gram-0.004N gram; The suds-stabilizing agent of 0.001N gram-0.004N gram.
In an embodiment of the present invention, in drilling fluid, N gram of water can be distilled water, natural fresh water or the fresh water through processing.
Water retaining comprise in following treatment agent one or more: carboxymethyl starch, Polyanionic Cellulose.
Tackifier comprise in following treatment agent one or more: the multipolymer of xanthan gum, hydroxypropyl guar, acrylate; Or, tackifier comprise oxygen scavenger and following one or more: the multipolymer of xanthan gum, hydroxypropyl guar, acrylate.Wherein, in an embodiment of the present invention, that concrete employing is acrylate copolymer 80A51.
Whipping agent comprise in following treatment agent one or more: sodium laurylsulfonate, polyoxethylene octylphenyl phenol ether, OA-12, dodecyl sulphate tri ethanol ammonium salt.
Suds-stabilizing agent comprise in following treatment agent one or more: trolamine, ethanol, lauryl alcohol.
In a particular embodiment of the present invention, water retaining comprises: carboxymethyl starch and Polyanionic Cellulose; Wherein, the mass ratio of carboxymethyl starch and Polyanionic Cellulose is a:1; The span of a is 3 ~ 5; In of the present invention, moisture content≤5% of the water retaining configured, being mixed with the pH value after 1% aqueous solution is 8 ~ 10, apparent viscosity 20 ~ 35mPas, and decline phase increase >=120min; Wherein, water retaining is mainly used in gas core in this drilling fluid system and is formed outward, and the rete of parcel gas core, begins to take shape structure.Other has compared with the treatment agent of similar effect water retaining in the present invention with prior art, effectively can not only increase layer thickness, can also form outward at gas core the height wrapping up gas core and stick layer, effectively can prevent gas effusion in gas core, keep gas core to stablize, improve intensity.Further, this water retaining of the present invention and general drilling fluid treatment agent compatibleness are good, and this water retaining is nontoxic, harmless, for environment can acceptance type treatment agent.
In a particular embodiment of the present invention, tackifier comprise: xanthan gum, hydroxypropyl guar and oxygen scavenger; Wherein, the mass ratio of xanthan gum, hydroxypropyl guar and oxygen scavenger is b:c:1; The span of b is the span of 2 ~ 4, c is 3 ~ 1; In the present invention, moisture content≤15% of the tackifier configured, and these tackifier be mixed with 1.0% aqueous solution after pH value be 6.0 ~ 7.0, apparent viscosity 10 ~ 20mPas, steady time >=24h; Wherein, tackifier are mainly used in, in stable drilling fluid system, having consumption little, have simultaneously and regulate the effect of drilling fluid flow pattern.Tackifier of the present invention are applicable to the temperature environment being less than or equal to 120 DEG C, other has compared with the treatment agent of similar effect with prior art, can not only effectively stablize in drilling fluid, the gas-liquid layering that preventing floats occurs, the unstable situation of system occur, and drilling fluid flow pattern can be regulated, viscosity is lower at high shear rates to make drilling fluid, makes drilling fluid have good rheological, is conducive to brokenly rock; Viscosity is higher at low shear rates, is conducive to cutting carring.Further, these tackifier of the present invention and general drilling fluid treatment agent compatibleness are good, and these tackifier are nontoxic, harmless, for environment can acceptance type treatment agent.
In a particular embodiment of the present invention, whipping agent comprises: sodium laurylsulfonate, polyoxethylene octylphenyl phenol ether, OA-12 and dodecyl sulphate tri ethanol ammonium salt; Wherein, the mass ratio of sodium laurylsulfonate, polyoxethylene octylphenyl phenol ether, OA-12 and dodecyl sulphate tri ethanol ammonium salt is d:1:1:1; The span of d is 1 ~ 3; In the present invention, the pH value 7.0 ~ 9.0 of the whipping agent configured, density 0.90 ~ 1.00g/cm3, base fluid froth quality >=20%, base fluid transformation period >=120.0min, 10% sodium ion water bubble quality >=50%, 5% calcium ion water bubble quality >=50%; Wherein, the whipping agent in the present invention is applicable to the temperature environment being less than or equal to 120 DEG C, is mainly used in nucleation in drilling fluid system, effectively in system, fully can form gas core.Other has compared with the treatment agent of similar effect this whipping agent with prior art, has the advantages that consumption is little, nucleogenesis is strong, also has the characteristics such as anti-salt, anticalcium ability be strong.Further, this whipping agent of the present invention and general drilling fluid treatment agent compatibleness are good, and this whipping agent is nontoxic, harmless, for environment can acceptance type treatment agent.
Suds-stabilizing agent comprises: trolamine, ethanol and lauryl alcohol; Wherein, the mass ratio of trolamine, ethanol and lauryl alcohol is 1:1:e; The span of e is 1 ~ 2.In the present invention, the pH value of the suds-stabilizing agent configured is 5.0 ~ 7.0, density 0.7 ~ 1.0g/cm3, volume compressibility >=15%.Wherein, this suds-stabilizing agent is mainly used in the rete forming parcel gas core at gas core outward, begins to take shape structure.Suds-stabilizing agent of the present invention is applicable to the temperature environment being less than or equal to 120 DEG C, other has compared with the treatment agent of similar effect with prior art, effectively can not only reduce gas core and surface tension continuously, can also form outward at gas core the height wrapping up gas core and stick layer, effectively can prevent gas effusion in gas core, keep gas core to stablize, improve intensity.Further, this suds-stabilizing agent of the present invention and general drilling fluid treatment agent compatibleness are well, nontoxic, harmless, for environment can acceptance type treatment agent.
Due in specific operation process of the present invention, easily occur that the clay borehole wall expands, or the temperature on stratum is too high makes each treatment agent effect in drilling fluid not obvious, or the phenomenon such as rotten.In other embodiments of the invention, this drilling fluid also comprises one or more in following treatment agent: the clay inhibitor of 0.03N gram-0.05N gram; The temperature stabilising agent of 0.01N gram-0.03N gram; The sterilant of 0.001N gram-0.003N gram.
Clay inhibitor comprise in following treatment agent one or both: Repone K, small cation; Wherein, small cation and diallyldimethylammonium chloride; This clay inhibitor is used for preventing the clay borehole wall from expanding, the phenomenon occurring well wall dropping block or cave in.When adopting Repone K as clay inhibitor, the ability of stronger suppression clay and drilling cuttings dispersion can be reached, improve the inhibition of drilling fluid, be conducive to the stable of solids control and the borehole wall.
Temperature stabilising agent comprise in following treatment agent one or more: low-molecular(weight)polymer stablizer, sulfonated phenol formaldehyde resin and modifier thereof, chromate, sulfonated lignite modifier, organic sulfonated polymer class; Wherein, in an embodiment of the present invention, this temperature stabilising agent is specially low-molecular(weight)polymer stablizer PC-J10S.
Temperature stabilising agent is used for the temperature on temperature stratum, prevents the too high various treatment agents inefficacies made in drilling fluid of temperature.
Sterilant comprise in following treatment agent one or more: glutaraldehyde, acetic acid, Peracetic Acid, lactic acid, propionic acid.This sterilant is used for preventing at a higher temperature, and under longer duration of service, the various handlers in drilling fluid is gone bad.
In concrete use procedure of the present invention, glue water retaining and tackifier partition not being made 1.0% and 1.0% uses, and adds whipping agent and other class treatment agents according to formula in base fluid, and after fully shearing, circulation more than half an hour uses.Whipping agent and glue should be supplemented, for adjusting rheological when supplementing new slurry in drilling process simultaneously.
In order to make technical scheme of the present invention clearly, understand, below enumerate specific embodiment and book further illustrated to technical scheme of the present invention.
Embodiment one
The water of consisting of in the present embodiment in drilling fluid: N gram, N is positive number; The anhydrous sodium carbonate of 0.001N gram; The sodium hydroxide of 0.001N gram; The water retaining of 0.005N gram; In this water retaining, the mass ratio of carboxymethyl starch and Polyanionic Cellulose is 3:1; The tackifier of 0.005N gram; In these tackifier, the mass ratio of xanthan gum, hydroxypropyl guar and oxygen scavenger is 2:3:5; The whipping agent of 0.001N gram, in this whipping agent, the mass ratio of sodium laurylsulfonate, polyoxethylene octylphenyl phenol ether, OA-12 and dodecyl sulphate tri ethanol ammonium salt is 1:1:1:1; The suds-stabilizing agent of 0.001N gram, in this suds-stabilizing agent, the mass ratio of trolamine, ethanol and lauryl alcohol is 1:1:1; The clay inhibitor of 0.03N gram, this clay inhibitor is Repone K; The temperature stabilising agent of 0.01N gram, this temperature stabilising agent is low-molecular(weight)polymer stablizer; The sterilant of 0.001N gram, this sterilant is glutaraldehyde.
Wherein the value of N is 400, then in the present embodiment, this drilling fluid comprises: water 400g, anhydrous sodium carbonate 0.40g, sodium hydroxide 0.40g, water retaining 2.00g(are made up of with ratio of quality and the number of copies 3:1 carboxymethyl starch and Polyanionic Cellulose), tackifier 2.00g(is made up of with ratio of quality and the number of copies 2:3:5 xanthan gum, hydroxypropyl guar and oxygen scavenger Na2SO3, wherein, the number-average molecular weight of yellow collagen is 2 × 106g/mol); Whipping agent 0.40g(is made up of with ratio of quality and the number of copies 1:1:1:1 sodium laurylsulfonate, polyoxethylene octylphenyl phenol ether, OA-12 and dodecyl sulphate tri ethanol ammonium salt four kinds of materials); Suds-stabilizing agent 0.40g(is made up of with ratio of quality and the number of copies 1:1:1 trolamine, ethanol and lauryl alcohol three kinds of materials); Clay inhibitor KCl12.0g; Temperature stabilising agent 4.0g, sterilant glutaraldehyde 0.4g.
According to the ratio of above-mentioned each treatment agent, under agitation, Xiang Shuizhong adds anhydrous sodium carbonate successively, sodium hydroxide, water retaining, tackifier, whipping agent, suds-stabilizing agent, clay inhibitor, temperature stabilising agent, sterilant be mixed with No. 1 drilling fluid.Wherein, the speed of stirring can control at about 5000rpm.
Embodiment two
The water of consisting of in the present embodiment in drilling fluid: N gram, N is positive number; The anhydrous sodium carbonate of 0.001N gram; The sodium hydroxide of 0.001N gram; The water retaining of 0.006N gram; In this water retaining, the mass ratio of carboxymethyl starch and Polyanionic Cellulose is 4:1; The tackifier of 0.008N gram; In these tackifier, the mass ratio of xanthan gum, hydroxypropyl guar and oxygen scavenger is 3:2:5; The whipping agent of 0.002N gram, in this whipping agent, the mass ratio of sodium laurylsulfonate, polyoxethylene octylphenyl phenol ether, OA-12 and dodecyl sulphate tri ethanol ammonium salt is 2:1:1:1; The suds-stabilizing agent of 0.002N gram, in this suds-stabilizing agent, the mass ratio of trolamine, ethanol and lauryl alcohol is 1:1:2; The clay inhibitor of 0.04N gram, this clay inhibitor is Repone K; The temperature stabilising agent of 0.02N gram, this temperature stabilising agent is low-molecular(weight)polymer stablizer; The sterilant of 0.002N gram, this sterilant is glutaraldehyde.
Wherein the value of N is 400, then in the present embodiment, this drilling fluid comprises: water 400g, anhydrous sodium carbonate 0.40g, sodium hydroxide 0.40g, water retaining 2.40g(is made up of with ratio of quality and the number of copies 4:1 carboxymethyl starch and Polyanionic Cellulose), tackifier 3.20g(is by xanthan gum, hydroxypropyl guar and oxygen scavenger Na2SO3 form with ratio of quality and the number of copies 3:2:5, wherein, the number-average molecular weight of yellow collagen is 1.5 × 107g/mol), whipping agent 0.80g(is by sodium laurylsulfonate, polyoxethylene octylphenyl phenol ether, OA-12 and dodecyl sulphate tri ethanol ammonium salt four kinds of materials form with ratio of quality and the number of copies 2:1:1:1), suds-stabilizing agent 0.80g(is made up of with ratio of quality and the number of copies 1:1:2 trolamine, ethanol and lauryl alcohol three kinds of materials), clay inhibitor KCl16.0g, temperature stabilising agent 8.0g, sterilant glutaraldehyde 0.8g.
According to the ratio of above-mentioned each treatment agent, under agitation, Xiang Shuizhong adds anhydrous sodium carbonate successively, sodium hydroxide, water retaining, tackifier, whipping agent, suds-stabilizing agent, clay inhibitor, temperature stabilising agent, sterilant be mixed with No. 2 drilling fluids.Wherein, the speed of stirring can control at about 5000rpm.
Embodiment three
The water of consisting of in the present embodiment in drilling fluid: N gram, N is positive number; The anhydrous sodium carbonate of 0.001N gram; The sodium hydroxide of 0.001N gram; The water retaining of 0.008N gram; In this water retaining, the mass ratio of carboxymethyl starch and Polyanionic Cellulose is 5:1; The tackifier of 0.01N gram; In these tackifier, the mass ratio of xanthan gum, hydroxypropyl guar and oxygen scavenger is 4:1:5; The whipping agent of 0.003N gram, in this whipping agent, the mass ratio of sodium laurylsulfonate, polyoxethylene octylphenyl phenol ether, OA-12 and dodecyl sulphate tri ethanol ammonium salt is 3:1:1:1; The suds-stabilizing agent of 0.003N gram, in this suds-stabilizing agent, the mass ratio of trolamine, ethanol and lauryl alcohol is 1:1:2; The clay inhibitor of 0.05N gram, this clay inhibitor is Repone K; The temperature stabilising agent of 0.03N gram, this temperature stabilising agent is low-molecular(weight)polymer stablizer; The sterilant of 0.003N gram, this sterilant is glutaraldehyde.
Wherein the value of N is 400, then in the present embodiment, this drilling fluid comprises: water 400g, anhydrous sodium carbonate 0.40g, sodium hydroxide 0.40g, water retaining 3.20g(is made up of with ratio of quality and the number of copies 5:1 carboxymethyl starch and Polyanionic Cellulose), tackifier 4.00g(is by xanthan gum, hydroxypropyl guar and oxygen scavenger Na2SO3 form with ratio of quality and the number of copies 4:1:5, wherein, the number-average molecular weight of yellow collagen is 2 × 107g/mol), whipping agent 1.20g(is by sodium laurylsulfonate, polyoxethylene octylphenyl phenol ether, OA-12 and dodecyl sulphate tri ethanol ammonium salt four kinds of materials form with ratio of quality and the number of copies 3:1:1:1), suds-stabilizing agent 1.20g(is by trolamine, ethanol and lauryl alcohol three kinds of materials form with ratio of quality and the number of copies 1:1:2), clay inhibitor KCl20.0g, temperature stabilising agent low-molecular(weight)polymer stablizer 12.0g, sterilant glutaraldehyde 1.2g.
According to the ratio of above-mentioned each treatment agent, under agitation, Xiang Shuizhong adds anhydrous sodium carbonate successively, sodium hydroxide, water retaining, tackifier, whipping agent, suds-stabilizing agent, clay inhibitor, temperature stabilising agent, sterilant be mixed with No. 3 drilling fluids.Wherein, the speed of stirring can control at about 5000rpm.
Embodiment four
The water of consisting of in the present embodiment in drilling fluid: N gram, N is positive number; The anhydrous sodium carbonate of 0.001N gram; The sodium hydroxide of 0.001N gram; The water retaining of 0.009N gram; In this water retaining, the mass ratio of carboxymethyl starch and Polyanionic Cellulose is 3:1; The tackifier of 0.012N gram; In these tackifier, the mass ratio of xanthan gum, hydroxypropyl guar and oxygen scavenger is 2:3:5; The whipping agent of 0.0035N gram, in this whipping agent, the mass ratio of sodium laurylsulfonate, polyoxethylene octylphenyl phenol ether, OA-12 and dodecyl sulphate tri ethanol ammonium salt is 1:1:1:1; The suds-stabilizing agent of 0.003N gram, in this suds-stabilizing agent, the mass ratio of trolamine, ethanol and lauryl alcohol is 1:1:2; The clay inhibitor of 0.05N gram, this clay inhibitor is Repone K; The temperature stabilising agent of 0.03N gram, this temperature stabilising agent is low-molecular(weight)polymer stablizer; The sterilant of 0.003N gram, this sterilant is glutaraldehyde.
Wherein the value of N is 400, then in the present embodiment, this drilling fluid comprises: water 400g, anhydrous sodium carbonate 0.40g, sodium hydroxide 0.40g, water retaining 3.20g(is made up of with ratio of quality and the number of copies 5:1 carboxymethyl starch and Polyanionic Cellulose), tackifier 4.00g(is by xanthan gum, hydroxypropyl guar and oxygen scavenger Na2SO3 form with ratio of quality and the number of copies 4:1:5, wherein, the number-average molecular weight of yellow collagen is 2 × 107g/mol), whipping agent 1.20g(is by sodium laurylsulfonate, polyoxethylene octylphenyl phenol ether, OA-12 and dodecyl sulphate tri ethanol ammonium salt four kinds of materials form with ratio of quality and the number of copies 3:1:1:1), suds-stabilizing agent 1.20g(is by trolamine, ethanol and lauryl alcohol three kinds of materials form with ratio of quality and the number of copies 1:1:2), clay inhibitor KCl20.0g, temperature stabilising agent low-molecular(weight)polymer stablizer 12.0g, sterilant glutaraldehyde 1.2g.
According to the ratio of above-mentioned each treatment agent, under agitation, Xiang Shuizhong adds anhydrous sodium carbonate successively, sodium hydroxide, water retaining, tackifier, whipping agent, suds-stabilizing agent, clay inhibitor, temperature stabilising agent, sterilant be mixed with No. 4 drilling fluids.Wherein, the speed of stirring can control at about 5000rpm.
Embodiment five
The water of consisting of in the present embodiment in drilling fluid: N gram, N is positive number; The anhydrous sodium carbonate of 0.001N gram; The sodium hydroxide of 0.001N gram; The water retaining of 0.0085N gram; In this water retaining, the mass ratio of carboxymethyl starch and Polyanionic Cellulose is 3:1; The tackifier of 0.01N gram; In these tackifier, the mass ratio of xanthan gum, hydroxypropyl guar and oxygen scavenger is 2:3:5; The whipping agent of 0.0035N gram, in this whipping agent, the mass ratio of sodium laurylsulfonate, polyoxethylene octylphenyl phenol ether, OA-12 and dodecyl sulphate tri ethanol ammonium salt is 1:1:1:1; The suds-stabilizing agent of 0.005N gram, in this suds-stabilizing agent, the mass ratio of trolamine, ethanol and lauryl alcohol is 1:1:2; The clay inhibitor of 0.05N gram, this clay inhibitor is Repone K; The temperature stabilising agent of 0.03N gram, this temperature stabilising agent is low-molecular(weight)polymer stablizer; The sterilant of 0.003N gram, this sterilant is glutaraldehyde.
Wherein the value of N is 400, then in the present embodiment, this drilling fluid comprises: water 400g, anhydrous sodium carbonate 0.40g, sodium hydroxide 0.40g, water retaining 3.20g(is made up of with ratio of quality and the number of copies 5:1 carboxymethyl starch and Polyanionic Cellulose), tackifier 4.00g(is by xanthan gum, hydroxypropyl guar and oxygen scavenger Na2SO3 form with ratio of quality and the number of copies 4:1:5, wherein, the number-average molecular weight of yellow collagen is 2 × 107g/mol), whipping agent 1.20g(is by sodium laurylsulfonate, polyoxethylene octylphenyl phenol ether, OA-12 and dodecyl sulphate tri ethanol ammonium salt four kinds of materials form with ratio of quality and the number of copies 3:1:1:1), suds-stabilizing agent 1.20g(is by trolamine, ethanol and lauryl alcohol three kinds of materials form with ratio of quality and the number of copies 1:1:2), clay inhibitor KCl20.0g, temperature stabilising agent low-molecular(weight)polymer stablizer 12.0g, sterilant glutaraldehyde 1.2g.
According to the ratio of above-mentioned each treatment agent, under agitation, Xiang Shuizhong adds anhydrous sodium carbonate successively, sodium hydroxide, water retaining, tackifier, whipping agent, suds-stabilizing agent, clay inhibitor, temperature stabilising agent, sterilant be mixed with No. 5 drilling fluids.Wherein, the speed of stirring can control at about 5000rpm.
Performance evaluation
Performance evaluation is carried out to the drilling fluid obtained in above-described embodiment one to embodiment five.
1, density measurement
With the drilling fluid liquidensitometer of suitable range, measure the density of No. 1, No. 2, No. 3, No. 4 and No. 5 drilling fluid respectively.
2, pH value measures
The drop of No. 1, No. 2, No. 3, No. 4 and No. 5 drilling fluid is dipped respectively on pH test paper, reference standard color range reading with cleaned glass rod.
3, plastic viscosity, yield value and gel strength measure
To No. 1, No. 2, No. 3, No. 4 and No. 5 drilling fluids be obtained get respectively the sample of identical milliliter number, rotational viscosimeter records stable reading under 600 rev/min and 300 rev/min rotating speeds respectively, by formula (I), formula (II) respectively computational plasticity viscosity, yield value, ingress, egress.
PV＝θ
600-θ
300（I)
In formula: PV is plastic viscosity, and unit is mPas; YP is yield value, and unit is Pa; θ
600, θ
300the stable reading under 600 rev/min and 300 rev/min rotating speeds, zero dimension.
4, drilling fluid fluid loss measures dehydration mensuration
To No. 1, No. 2, No. 3, No. 4 and No. 5 drilling fluids be obtained get respectively the sample of identical milliliter number, middle pressure filter press will measure.Mensuration process is as follows:
4.1 inject the mud of a certain amount of (240mL) to groove place in cup in mud cup, assembling mud cup assembly.
Drilling fluid cup is inverted by 4.2, and gas transmission tip side upwards loads purging valve makes its half-twist.
The graduated cylinder of drying is placed on the base position below vent pipe by 4.3, aims at mud cup drainage mouth and is used for receiving filtrate.
4.4 open source of the gas, and clockwise direction is rotating pressure-decreasing valve module voltate regulator handle slowly, and pressure is adjusted to 0.69MPa.
4.5 start the stopwatch record leak-off time when pointer starts fluctuation or have airflow noise to enter mud cup.
4.6 are recorded in the volume (being accurate to 0.1 milliliter) of 30min filtrate and measure filter loss as drilling fluid fluid loss in units of milliliter, record the initial temperature DEG C (℉ of drilling fluid sample simultaneously), retain filtrate and be used as chemical analysis.
5, extreme boundary lubrication measures
To No. 1, No. 2, No. 3, No. 4 and No. 5 drilling fluids be obtained get respectively the sample of identical milliliter number, extreme boundary lubrication instrument will measure.Mensuration process is as follows:
5.1 start instrument, and make its 15min that operates at 300 rpm, rear adjusting rotary speed is 60rpm(deviation ± 5rpm), powered-down after stable reading, adjustment torque spanner is zero.
5.2 install slide block, slip ring.
5.3 by topping-up in sample cup, makes the submergence of slide block slip ring wherein, and start idle running 5min also checks whether tachometer gage and torsionmeter are in the state of mixing up.Torque spanner value is regulated to be 16.95Ns(150Psi), adjusting rotary speed is 62rpm, and rotating speed is now rated rotational frequency, regulates reading to be zero when laying down pressure idle running.
5.4 under rated rotational frequency, regulates rapidly torque spanner to make the dial plate value of torque spanner be 16.95Ns(150Psi), running 5min, reading is now 28 ~ 48, record reading (if not within the scope of this, from new correction).Be calculated as follows correction factor:
5.5 fill working fluid to be measured by sample cup, make the submergence of slide block slip ring wherein, regulate torque spanner value to be 16.95Ns(150Psi), adjusting rotary speed is 62rpm, record reading now.Be calculated as follows the coefficient of friction resistance:
6, leak stopping performance measurement
Static leaking stoppage experiment, uses Inst of Drilling-Well Technology, Huabei Petroleum Administration sealing Analog Device, selects 40 ~ 60 order sand to do casting bed leaking stoppage experiment.Add and drive pressure 5.5MPa, back pressure 0.5MPa, record wastage and plugging time.
Dynamic leaking stoppage experiment, uses rock productivity simulation equipment, chooses rate of permeation and be less than 0.5 ~ 1.0 μm
2rock core leaking stoppage experiment is done in formation core or people's lithogenesis.Add and drive pressure 5.5MPa, back pressure 0.5MPa, shearing rate 300s
-1, record wastage and plugging time.
7, core permeability recovery value measures
Perform by oil and gas industry standard SY/T6540-2002 " drilling fluid drilling fluid damage oil reservoir indoor evaluation method ", under using understressed sand productivity simulation unit simulation drilling condition, the reservoir protection effect of drilling fluid is studied and evaluated.
According to above-mentioned experimental procedure, obtain No. 1 property of drilling fluid as shown in table 1, No. 2 property of drilling fluid are as shown in table 2, and No. 3 property of drilling fluid are as shown in table 3, and No. 4 property of drilling fluid are as shown in table 4, and No. 5 property of drilling fluid are as shown in table 5.
| Project | Requirement | Test value |
| Density, g/cm 3 | 0.90～1.00 | 0.91 |
| PH value | 9～11 | 10 |
| Plastic viscosity, mPas | 10～30 | 16 |
| Yield value, Pa | 10～20 | 12 |
| Drilling fluid fluid loss measures, mL | 1.0～7.0 | 4.3 |
| Extreme boundary lubrication coefficient | 0～0.2 | 0.062 |
| Static wastage, mL/30min | ≤10 | 1.2 |
| Dynamic wastage, mL/30min | ≤10 | 0 |
| Core permeability recovery value, % | ≥85 | 90.1 |
Table 1
| Project | Requirement | Test value |
| Density, g/cm 3 | 0.85～0.90 | 0.86 |
| PH value | 9～11 | 10 |
| Plastic viscosity, mPas | 10～30 | 18 |
| Yield value, Pa | 10～20 | 13 |
| Drilling fluid fluid loss measures, ml | 1.0～7.0 | 4.1 |
| Extreme boundary lubrication coefficient | 0～0.2 | 0.074 |
| Static wastage, mL/30min | ≤10 | 0.8 |
| Dynamic wastage, mL/30min | ≤10 | 0 |
| Core permeability recovery value, % | ≥85 | 88.4 |
Table 2
| Project | Requirement | Test value |
| Density, g/cm 3 | 0.75～0.85 | 0.81 |
| PH value | 9～11 | 10 |
| Plastic viscosity, mPas | 10～30 | 22 |
| Yield value, Pa | 10～20 | 17 |
| Drilling fluid fluid loss measures, ml | 1.0～7.0 | 5.3 |
| Extreme boundary lubrication coefficient | 0～0.2 | 0.064 |
| Static wastage, mL/30min | ≤10 | 2.1 |
| Dynamic wastage, mL/30min | ≤10 | 0 |
| Core permeability recovery value, % | ≥85 | 85.7 |
Table 3
| Project | Requirement | Test value |
| Density, g/cm 3 | 0.85～0.90 | 0.88 |
| PH value | 9～11 | 10 |
| Plastic viscosity, mPas | 10～30 | 26 |
| Yield value, Pa | 10～20 | 19 |
| Drilling fluid fluid loss measures, ml | 1.0～7.0 | 4.1 |
| Extreme boundary lubrication coefficient | 0～0.2 | 0.074 |
| Static wastage, mL/30min | ≤10 | 0.8 |
| Dynamic wastage, mL/30min | ≤10 | 0 |
| Core permeability recovery value, % | ≥85 | 88.0 |
Table 4
| Project | Requirement | Test value |
| Density, g/cm 3 | 0.85～0.90 | 0.85 |
| PH value | 9～11 | 10 |
| Plastic viscosity, mPas | 10～30 | 25 |
| Yield value, Pa | 10～20 | 16 |
| Drilling fluid fluid loss measures, ml | 1.0～7.0 | 4.1 |
| Extreme boundary lubrication coefficient | 0～0.2 | 0.074 |
| Static wastage, mL/30min | ≤10 | 0.8 |
| Dynamic wastage, mL/30min | ≤10 | 0 |
| Core permeability recovery value, % | ≥85 | 88.0 |
Table 5
As can be seen from above experimental result, the property indices of drilling fluid of the present invention all reaches design requirements.Drilling fluid of the present invention, performance table for 1 ~ No. 3 drilling fluid is known, its density is adjustable, can adjust, pH value 9 ~ 11 within the scope of 0.75 ~ 1.00g/cm3, plastic viscosity 10 ~ 30mPas, yield value 10 ~ 30Pa, drilling fluid fluid loss measures 1.0 ~ 7.0mL, extreme boundary lubrication coefficient 0 ~ 0.2, static wastage≤10mL/30min, dynamic wastage≤10mL/30min.For No. 1, No. 4 and No. 5 drilling fluids, by changing water retaining, tackifier, whipping agent, the suds-stabilizing agent equal size in this drilling fluid, the density of drilling fluid can be regulated automatically, such as, can adjust within the scope of 0.75 ~ 1.00g/cm3; And ensure that the span of pH value is 9 ~ 11, the span of plastic viscosity is 10 ~ 30mPas, the span of yield value is 10 ~ 30Pa, the span that drilling fluid fluid loss measures is 1.0 ~ 7.0mL, the span of extreme boundary lubrication coefficient is 0 ~ 0.2, the span of static wastage is≤10mL/30min, and the span of dynamic wastage is≤10mL/30min.Meet the standard of the drilling fluid under multiple leakage environment, have good leak-proof leak-stopping effect, formula controllable, the stable performance of drilling fluid, execute-in-place is easy, only needs to add corresponding component, does not need other equipment.
In sum, drilling fluid provided by the invention is mainly used as leak-proof leak-stopping when leakage stratum is crept into, and it has the effect of filtrate reducing, lubrication concurrently simultaneously; Drilling fluid provided by the invention overcomes the shortcoming that nitrogen foam configuration device is numerous and jumbled, foam density controls difficulty, dosing apparatus is simple and easy, and density adjusts easy advantage, and except possessing the feature of foam class drilling fluid, the also advantage of newly-increased leak-proof leak-stopping, and have more the adjustable feature of density.Drilling fluid provided by the invention solves the problem that leakage easily occurs in low pressure and leakmess formation drilling process, effectively can improve the bearing capacity on stratum.
The foregoing is only preferred embodiment of the present invention, be not intended to limit protection scope of the present invention.All any amendments done within the spirit and principles in the present invention, equivalent replacement, improvement etc., be all included in protection scope of the present invention.
Claims (5)
1. a drilling fluid, consisting of of described drilling fluid:
The water of N gram, N is positive number;
The anhydrous sodium carbonate of 0.001N gram;
The sodium hydroxide of 0.001N gram;
The water retaining of 0.005N gram-0.01N gram;
The tackifier of 0.005N gram-0.01N gram;
The whipping agent of 0.001N gram-0.004N gram;
The suds-stabilizing agent of 0.001N gram-0.004N gram;
The clay inhibitor of 0.03N gram-0.05N gram;
The temperature stabilising agent of 0.01N gram-0.03N gram;
The sterilant of 0.001N gram-0.003N gram;
Described clay inhibitor is: Repone K;
Described temperature stabilising agent be selected from following one or more: sulfonated phenol formaldehyde resin and modifier, chromate, sulfonated lignite modifier, organic sulfonated polymer class;
Described sterilant be selected from following one or more: glutaraldehyde, acetic acid, Peracetic Acid, lactic acid, propionic acid;
Wherein, described water retaining is: carboxymethyl starch and Polyanionic Cellulose; Wherein, the mass ratio of carboxymethyl starch and Polyanionic Cellulose is 3:1;
Described tackifier are: xanthan gum, hydroxypropyl guar and oxygen scavenger; Wherein, the mass ratio of xanthan gum, hydroxypropyl guar and oxygen scavenger is 2:3:5; Described oxygen scavenger is Na
2sO
3;
Described whipping agent is: sodium laurylsulfonate, polyoxethylene octylphenyl phenol ether, OA-12 and dodecyl sulphate tri ethanol ammonium salt; Wherein, the mass ratio of sodium laurylsulfonate, polyoxethylene octylphenyl phenol ether, OA-12 and dodecyl sulphate tri ethanol ammonium salt is 1:1:1:1;
Described suds-stabilizing agent is: trolamine, ethanol and lauryl alcohol; Wherein, the mass ratio of trolamine, ethanol and lauryl alcohol is 1:1:1.
2. a drilling fluid, consisting of of described drilling fluid:
The water of N gram, N is positive number;
The anhydrous sodium carbonate of 0.001N gram;
The sodium hydroxide of 0.001N gram;
The water retaining of 0.005N gram-0.01N gram;
The tackifier of 0.005N gram-0.01N gram;
The whipping agent of 0.001N gram-0.004N gram;
The suds-stabilizing agent of 0.001N gram-0.004N gram;
The clay inhibitor of 0.03N gram-0.05N gram;
The temperature stabilising agent of 0.01N gram-0.03N gram;
The sterilant of 0.001N gram-0.003N gram;
Described clay inhibitor is: Repone K;
Described temperature stabilising agent be selected from following one or more: sulfonated phenol formaldehyde resin and modifier, chromate, sulfonated lignite modifier, organic sulfonated polymer class;
Described sterilant be selected from following one or more: glutaraldehyde, acetic acid, Peracetic Acid, lactic acid, propionic acid;
This water retaining is carboxymethyl starch and Polyanionic Cellulose, and both mass ratioes are 4:1;
These tackifier are xanthan gum, hydroxypropyl guar and oxygen scavenger, and the mass ratio of three is 3:2:5; Described oxygen scavenger is Na
2sO
3;
This whipping agent is sodium laurylsulfonate, polyoxethylene octylphenyl phenol ether, OA-12 and dodecyl sulphate tri ethanol ammonium salt, and the mass ratio of four is 2:1:1:1;
This suds-stabilizing agent is trolamine, ethanol and lauryl alcohol, and the mass ratio of three is 1:1:2.
3. a drilling fluid, consisting of of described drilling fluid:
The water of N gram, N is positive number;
The anhydrous sodium carbonate of 0.001N gram;
The sodium hydroxide of 0.001N gram;
The water retaining of 0.005N gram-0.01N gram;
The tackifier of 0.005N gram-0.01N gram;
The whipping agent of 0.001N gram-0.004N gram;
The suds-stabilizing agent of 0.001N gram-0.004N gram;
The clay inhibitor of 0.03N gram-0.05N gram;
The temperature stabilising agent of 0.01N gram-0.03N gram;
The sterilant of 0.001N gram-0.003N gram;
Described clay inhibitor is: Repone K;
Described temperature stabilising agent be selected from following one or more: sulfonated phenol formaldehyde resin and modifier, chromate, sulfonated lignite modifier, organic sulfonated polymer class;
Described sterilant be selected from following one or more: glutaraldehyde, acetic acid, Peracetic Acid, lactic acid, propionic acid;
This water retaining is carboxymethyl starch and Polyanionic Cellulose, and both mass ratioes are 5:1;
These tackifier are xanthan gum, hydroxypropyl guar and oxygen scavenger, and the mass ratio of three is 4:1:5; Described oxygen scavenger is Na
2sO
3;
This whipping agent is sodium laurylsulfonate, polyoxethylene octylphenyl phenol ether, OA-12 and dodecyl sulphate tri ethanol ammonium salt, and the mass ratio of four is 3:1:1:1;
This suds-stabilizing agent is trolamine, ethanol and lauryl alcohol, and the mass ratio of three is 1:1:2.
4. drilling fluid according to claim 1, is characterized in that,
Moisture content≤5% of described water retaining;
And/or,
Moisture content≤15% of described tackifier;
And/or,
Base fluid froth quality >=20% of described whipping agent;
And/or,
Volume compressibility >=15% of described suds-stabilizing agent.
5. a drilling fluid preparation method, is characterized in that, the method comprises:
In N gram of water limit stir add 0.001N gram successively anhydrous sodium carbonate, the sodium hydroxide of 0.001N gram, the water retaining of 0.005N gram-0.01N gram, the tackifier of 0.005N gram-0.01N gram, the whipping agent of 0.001N gram-0.004N gram, 0.001N gram-0.004N gram suds-stabilizing agent;
The method also comprises: in described drilling fluid, add following component while stirring:
The clay inhibitor of 0.03N gram-0.05N gram; The temperature stabilising agent of 0.01N gram-0.03N gram; The sterilant of 0.001N gram-0.003N gram;
Described clay inhibitor is: Repone K;
Described temperature stabilising agent be selected from following one or more: sulfonated phenol formaldehyde resin and modifier, chromate, sulfonated lignite modifier, organic sulfonated polymer class;
Described sterilant be selected from following one or more: glutaraldehyde, acetic acid, Peracetic Acid, lactic acid, propionic acid;
Wherein, described water retaining is: carboxymethyl starch and Polyanionic Cellulose; Wherein, the mass ratio of carboxymethyl starch and Polyanionic Cellulose is 3:1
Described tackifier are: xanthan gum, hydroxypropyl guar and oxygen scavenger; Wherein, the mass ratio of xanthan gum, hydroxypropyl guar and oxygen scavenger is 2:3:5; Described oxygen scavenger is Na
2sO
3;
Described whipping agent is: sodium laurylsulfonate, polyoxethylene octylphenyl phenol ether, OA-12 and dodecyl sulphate tri ethanol ammonium salt; Wherein, the mass ratio of sodium laurylsulfonate, polyoxethylene octylphenyl phenol ether, OA-12 and dodecyl sulphate tri ethanol ammonium salt is: 1:1:1;
Described suds-stabilizing agent is: trolamine, ethanol and lauryl alcohol; Wherein, the mass ratio of trolamine, ethanol and lauryl alcohol is 1:1:1.
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| CN103937469B (en) * | 2013-08-14 | 2016-08-24 | 北京百利时能源技术有限责任公司 | A kind of Solid Free micro-foam drilling fluid capable of circulation and preparation method thereof |
| CN104087273B (en) * | 2014-05-30 | 2018-06-26 | 中石化石油工程技术服务有限公司 | A kind of high salinity Solid Free micro-foam drilling fluid or completion fluid |
| CN104073226B (en) * | 2014-06-17 | 2019-12-27 | 中国石油化工集团公司 | Solid-free seawater micro-foam drilling fluid or completion fluid |
| CN104357183A (en) * | 2014-09-30 | 2015-02-18 | 苏州长盛机电有限公司 | Steam turbine oil composition and preparation method thereof |
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| CN107227147B (en) * | 2016-03-23 | 2020-08-18 | 中国石油化工股份有限公司 | Foaming agent and foam gas flooding method |
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