CN104762068A - Emulsion type fluid loss agent for drilling liquid and preparation method of emulsion type fluid loss agent - Google Patents
Emulsion type fluid loss agent for drilling liquid and preparation method of emulsion type fluid loss agent Download PDFInfo
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Abstract
The invention relates to the technical field of a fluid loss agent, and discloses an emulsion type fluid loss agent for drilling liquid and preparation method of the emulsion type fluid loss agent. The emulsion type fluid loss agent for drilling liquid comprises the raw materials in parts by weight: 10-35 parts of a monomer, 15-40 parts of a solvent A, 15-50 parts of a solvent B, 2-10 parts of a surfactant A, 2-20 parts of a surfactant B, 2-25 parts of a regulating agent and 0.02-0.2 part of an initiating agent. Compared with the prior art, the emulsion type fluid loss agent for the drilling liquid has the advantages of high dissolution speed, good lubrication effect and good temperature salinity resistance, and is capable of effectively reducing the filter loss quantity of mud slurries, mud cakes are quickly formed and an oil-gas layer is protected from being damaged; meanwhile, the emulsion type fluid loss agent is convenient to use and low in energy consumption, and the waste of resources is avoided.
Description
Technical field
the present invention relates to fluid loss agent technical field, is a kind of drilling fluid emulsion-type fluid loss agent and preparation method thereof.
Background technology
along with the continuous expansion and deeply of petroleum exploration and development, deep-well, ultra deep well continue to bring out.Exploitation well generally adopts simplification hole structure, uncased hole segment length.The problem how solving long open hole well section wellbore stability, upper formation blockage during tripping serious is put in face of us with becoming more and more important.And the increasing of this development difficulty, input cost improves constantly, and will be harsher to the requirement of drilling fluid additive, shows: one is technical progress, to meet more and more higher difficulty demand; Two is that requirement reduces costs, to adapt to the demand of current oil price system.The fluid loss additive for boring fluid of current each field use is mostly polymer powder, have that dissolution rate is slow, lubricant effect is poor and temperature resistant antisalt weak effect, rig-site utilization join glue process dissolution rate cause slowly increasing man-hour even partial polymer formed gel piece cause unstable properties and easily removed by Vibration Screen, form waste, most fluid loss agent is due to the restriction of production technique, there is the limitation that molecular weight distribution is wide, target product content is low, application and the post-processed at scene are comparatively complicated; Need the processes such as cutting, granulation, oven dry and pulverizing when using simultaneously, cause the increase of energy consumption.
Summary of the invention
the invention provides a kind of drilling fluid emulsion-type fluid loss agent and preparation method thereof, overcome the deficiency of above-mentioned prior art, it effectively can solve existing fluid loss additive for boring fluid and be mostly polymer powder, have that dissolution rate is slow, lubricant effect is poor, temperature resistant antisalt weak effect, easily cause the problem that the waste of resource and energy consumption increase simultaneously.
one of technical scheme of the present invention is realized by following measures: a kind of drilling fluid emulsion-type fluid loss agent, and raw materials by weight portion contains the monomer of 10 parts to 35 parts, the solvent orange 2 A of 15 parts to 40 parts, the solvent B of 15 parts to 50 parts, the surfactant A of 2 parts to 10 parts, the surfactant B of 2 parts to 20 parts, the conditioning agent of 2 parts to 25 parts, the initiator of 0.02 part to 0.2 part.
here is the further optimization and/or improvements to one of foregoing invention technical scheme:
above-mentioned raw materials is by weight containing monomer, the solvent orange 2 A of 30 parts to 35 parts, the solvent B of 23 parts to 25 parts, the surfactant A of 3 parts to 4 parts, the surfactant B of 4 parts to 6 parts, the conditioning agent of 10 parts to 11 parts, the initiator of 0.05 part to 0.2 part of 12 parts to 20 parts.
above-mentioned drilling fluid emulsion-type fluid loss agent obtains as follows: the first step, and the surfactant A adding aequum after the monomer of aequum, solvent orange 2 A and conditioning agent being mixed again mixes and obtains solution A, second step, mixes the solvent B of aequum and surfactant B and obtains solution B, 3rd step, mixes the solution A obtained and the solution B that obtains and obtains pre-emulsion, 4th step, pre-emulsion is sheared through high-shear emulsion machine and is formed microemulsion, microemulsion is added in reactor, the temperature being cooled to microemulsion is 26 DEG C to 40 DEG C, reactor is evacuated to vacuum and is filled with nitrogen in reactor, the initiator of aequum is made into the initiator solution that mass percent is 5% to 10%, then the initiator solution prepared is added in reactor, reactor is evacuated to vacuum again, react under whipped state, when in question response still, temperature of charge rises to 40 DEG C to 60 DEG C, open pressure release valve, drilling fluid emulsion-type fluid loss agent is obtained after still aging 50min to 70min.
in above-mentioned 4th step, reactor is evacuated in vacuum, and the pressure be evacuated in reactor is-0.06MPa to-0.08MPa; Or/and in the 4th step, be filled with in nitrogen in reactor, the pressure of nitrogen in reactor is 0MPa to 0.5MPa; Or/and in the 4th step, react under whipped state, stir speed (S.S.) is 30r/min to 80r/min.
above-mentioned monomer is more than one in methacrylic acid, sodium acrylate, acrylamide, 2-acrylamide-2-methylpro panesulfonic acid and ammonium acrylate; Or/and solvent orange 2 A is more than one in deionized water and isooctyl alcohol; Or/and solvent B is mineral oil; Or/and surfactant A is more than one in OP-2, peregal, TX-10, OP-10, Tween20, Tween60 and Tween80; Or/and surfactant B is more than one in AEO-3, SP-20, SP-60, SP80, T152 and T154; Or/and conditioning agent is more than one in ammoniacal liquor, sodium hydroxide, potassium hydroxide and water glass; Or/and initiator is more than one in ammonium persulphate, sodium bisulfite, Diisopropyl azodicarboxylate and benzoyl peroxide.
above-mentioned mineral oil is more than one in diesel oil, aviation kerosene, 26# people's tooth oil, whiteruss, Oleum Gossypii semen tankage extractive matter and white oil.
two of technical scheme of the present invention is realized by following measures: a kind of preparation method of drilling fluid emulsion-type fluid loss agent, carry out in the steps below: the first step, the surfactant A adding aequum after the monomer of aequum, solvent orange 2 A and conditioning agent being mixed again mixes and obtains solution A, second step, mixes the solvent B of aequum and surfactant B and obtains solution B, 3rd step, mixes the solution A obtained and the solution B that obtains and obtains pre-emulsion, 4th step, pre-emulsion is sheared through high-shear emulsion machine and is formed microemulsion, microemulsion is added in reactor, the temperature being cooled to microemulsion is 26 DEG C to 40 DEG C, reactor is evacuated to vacuum and is filled with nitrogen in reactor, the initiator of aequum is made into the initiator solution that mass percent is 5% to 10%, then the initiator solution prepared is added in reactor, reactor is evacuated to vacuum again, react under whipped state, when in question response still, temperature of charge rises to 40 DEG C to 60 DEG C, open pressure release valve, drilling fluid emulsion-type fluid loss agent is obtained after still aging 50min to 70min.
here is the further optimization and/or improvements to foregoing invention technical scheme two:
in above-mentioned 4th step, reactor is evacuated in vacuum, and the pressure be evacuated in reactor is-0.06MPa to-0.08MPa; Or/and in the 4th step, be filled with in nitrogen in reactor, the pressure of nitrogen in reactor is 0MPa to 0.5MPa; Or/and in the 4th step, react under whipped state, stir speed (S.S.) is 30r/min to 80r/min.
above-mentioned monomer is more than one in methacrylic acid, sodium acrylate, acrylamide, 2-acrylamide-2-methylpro panesulfonic acid and ammonium acrylate; Or/and solvent orange 2 A is more than one in deionized water and isooctyl alcohol; Or/and solvent B is mineral oil; Or/and surfactant A is more than one in OP-2, peregal, TX-10, OP-10, Tween20, Tween60 and Tween80; Or/and surfactant B is more than one in AEO-3, SP-20, SP-60, SP80, T152 and T154; Or/and conditioning agent is more than one in ammoniacal liquor, sodium hydroxide, potassium hydroxide and water glass; Or/and initiator is more than one in ammonium persulphate, sodium bisulfite, Diisopropyl azodicarboxylate and benzoyl peroxide.
above-mentioned mineral oil is more than one in diesel oil, aviation kerosene, 26# people's tooth oil, whiteruss, Oleum Gossypii semen tankage extractive matter and white oil.
drilling fluid emulsion-type fluid loss agent of the present invention is fast compared with the dissolution rate of prior art fluid loss agent, high lubricating effect, the filter loss that effectively can reduce mud, temperature resistant antisalt are effective, is conducive to forming mud cake fast, ensures that hydrocarbon zone preserves from; Drilling fluid emulsion-type fluid loss agent of the present invention uses more convenient compared with prior art fluid loss agent simultaneously, reduces energy consumption, has stopped the waste of resource.
Embodiment
the present invention by the restriction of following embodiment, can not determine concrete embodiment according to technical scheme of the present invention and practical situation.
embodiment 1, this drilling fluid emulsion-type fluid loss agent, raw materials by weight portion contains the monomer of 10 parts to 35 parts, the solvent orange 2 A of 15 parts to 40 parts, the solvent B of 15 parts to 50 parts, the surfactant A of 2 parts to 10 parts, the surfactant B of 2 parts to 20 parts, the conditioning agent of 2 parts to 25 parts, the initiator of 0.02 part to 0.2 part.
embodiment 2, this drilling fluid emulsion-type fluid loss agent, raw materials by weight portion contains the monomer of 12 parts to 20 parts, the solvent orange 2 A of 30 parts to 35 parts, the solvent B of 23 parts to 25 parts, the surfactant A of 3 parts to 4 parts, the surfactant B of 4 parts to 6 parts, the conditioning agent of 10 parts to 11 parts, the initiator of 0.05 part to 0.2 part.
embodiment 3, this drilling fluid emulsion-type fluid loss agent, raw materials by weight portion contains the monomer of 12.3 parts, the solvent orange 2 A of 30 parts, the solvent B of 41 parts, the surfactant A of 3.18 parts, the surfactant B of 3 parts, the conditioning agent of 10.5 parts, the initiator of 0.02 part.
embodiment 4, this drilling fluid emulsion-type fluid loss agent, raw materials by weight portion contains the monomer of 25 parts, the solvent orange 2 A of 20 parts, the solvent B of 35 parts, the surfactant A of 3 parts, the surfactant B of 6.5 parts, the conditioning agent of 7 parts, the initiator of 0.06 part.
embodiment 5, this drilling fluid emulsion-type fluid loss agent, raw materials by weight portion contains the monomer of 20 parts, the solvent orange 2 A of 20 parts, the solvent B of 36 parts, the surfactant A of 2 parts, the surfactant B of 7 parts, the conditioning agent of 5 parts, the initiator of 0.06 part.
embodiment 6, this drilling fluid emulsion-type fluid loss agent, raw materials by weight portion contains the monomer of 23 parts, the solvent orange 2 A of 20 parts, the solvent B of 30 parts, the surfactant A of 4 parts, the surfactant B of 18 parts, the conditioning agent of 4 parts, the initiator of 0.06 part.
embodiment 7, raw materials by weight portion contains the monomer of 35 parts, the solvent orange 2 A of 25 parts, the solvent B of 30 parts, the surfactant A of 5 parts, the surfactant B of 10 parts, the conditioning agent of 5 parts, the initiator of 0.06 part.
embodiment 8, this drilling fluid emulsion-type fluid loss agent obtains by following preparation method: the first step, and the surfactant A adding aequum after the monomer of aequum, solvent orange 2 A and conditioning agent being mixed again mixes and obtains solution A, second step, mixes the solvent B of aequum and surfactant B and obtains solution B, 3rd step, mixes the solution A obtained and the solution B that obtains and obtains pre-emulsion, 4th step, pre-emulsion is sheared through high-shear emulsion machine and is formed microemulsion, microemulsion is added in reactor, the temperature being cooled to microemulsion is 26 DEG C to 40 DEG C, reactor is evacuated to vacuum and is filled with nitrogen in reactor, the initiator of aequum is made into the initiator solution that mass percent is 5% to 10%, then the initiator solution prepared is added in reactor, reactor is evacuated to vacuum again, react under whipped state, when in question response still, temperature of charge rises to 40 DEG C to 60 DEG C, open pressure release valve, drilling fluid emulsion-type fluid loss agent is obtained after still aging 50min to 70min.
embodiment 9, as the optimization of above-described embodiment, in the 4th step, reactor is evacuated in vacuum, and the pressure be evacuated in reactor is-0.06MPa to-0.08MPa; Or/and in the 4th step, be filled with in nitrogen in reactor, the pressure of nitrogen in reactor is 0MPa to 0.5MPa; Or/and in the 4th step, react under whipped state, stir speed (S.S.) is 30r/min to 80r/min.
embodiment 10, as the optimization of above-described embodiment, monomer is more than one in methacrylic acid, sodium acrylate, acrylamide, 2-acrylamide-2-methylpro panesulfonic acid and ammonium acrylate; Or/and solvent orange 2 A is more than one in deionized water and isooctyl alcohol; Or/and solvent B is mineral oil; Or/and surfactant A is more than one in OP-2, peregal, TX-10, OP-10, Tween20, Tween60 and Tween80; Or/and surfactant B is more than one in AEO-3, SP-20, SP-60, SP80, T152 and T154; Or/and conditioning agent is more than one in ammoniacal liquor, sodium hydroxide, potassium hydroxide and water glass; Or/and initiator is more than one in ammonium persulphate, sodium bisulfite, Diisopropyl azodicarboxylate and benzoyl peroxide.Monomer can be methacrylic acid, acrylamide and 2-acrylamide-2-methylpro panesulfonic acid in mass ratio for 2:3:1 is formulated; Conditioning agent can be ammoniacal liquor and potassium hydroxide is that 5:2 is formulated in mass ratio; Initiator can be ammonium persulphate and sodium bisulfite forms for 1:1 is composite in mass ratio.This temperature resistant antisalt monomer of 2-acrylamide-2-methylpro panesulfonic acid, effectively can control polymericular weight, the drilling fluid emulsion-type fluid loss agent of the present invention obtained is the emulsion of even molecular weight distribution, dissolution rate is fast, easily fast filming on the borehole wall, form fine and close tough and tensile mud cake, and then reduce filter loss, ensure that carrying out smoothly of wellbore construction; Drilling fluid emulsion-type fluid loss agent outward appearance of the present invention is homogeneous milky white liquid, free from extraneous odour, can be dispersed in base slurry, places one week rear performance without considerable change.
embodiment 11, as the optimization of above-described embodiment, mineral oil is more than one in diesel oil, aviation kerosene, 26# people's tooth oil, whiteruss, Oleum Gossypii semen tankage extractive matter and white oil.
the experiments of measuring (experiments of measuring high speed stir speed (S.S.) can be 11000r/min to 12000r/min) of the drilling fluid emulsion-type fluid loss agent that the above embodiment of the present invention obtains:
1. the dissolution time experiments of measuring of the drilling fluid emulsion-type fluid loss agent obtained according to the above embodiment of the present invention is as follows:
drilling fluid emulsion-type fluid loss agent 4g the above embodiment of the present invention obtained under 3000r/min stirring velocity slowly adds in 400ml deionized water, and till timing is stirred to uniform solution, writing time is dissolution time.
2. the lubricating coefficient reduced rate experiments of measuring of the drilling fluid emulsion-type fluid loss agent obtained according to the above embodiment of the present invention is as follows:
the preparation of base slurry: add 40g wilkinite and 3g Na in 1000mL distilled water
2
cO
3
, the aging 24h of the airtight placement of high-speed stirring 20min.
lubricating coefficient is measured: get 300mL base slurry high-speed stirring 5min, add the drilling fluid emulsion-type fluid loss agent that 3 ± 0.1g the above embodiment of the present invention obtains, after high-speed stirring 5min, E-P extreme boundary lubrication instrument measures lubricating coefficient.
lubricating coefficient reduced rate calculates:
R=((K
1
-K
2
)/K
1
)×100
in formula: R-lubricating coefficient reduced rate, %;
k
1
the lubricating coefficient of-base slurry;
k
2
-base slurry adds the lubricating coefficient after sample;
3. in the fresh water-based slurry normal temperature of the drilling fluid emulsion-type fluid loss agent obtained according to the above embodiment of the present invention, press filtration vector experiments of measuring is as follows:
fresh water-based slurry preparation: claim accurate to 0.1g in adding 40.0g(in often liter of distilled water) wilkinite and 2.40g(claim accurate to 0.01g) ratio of anhydrous sodium carbonate.Preparation 400mL base slurry, high-speed stirring 20min, at least stop twice therebetween, to scrape adhesion wilkinite on the wall, curing in airtight condition 24h at 25 ± 3 DEG C, high-speed stirring 5min again, surveying press filtration vector in its normal temperature, the requirement of 4% wilkinite fresh water-based slurry in table 6 should being met, as do not met, adjustable bentonitic dosage, till meeting.
in fresh water-based slurry normal temperature, press filtration vector measures: get the fresh water-based slurry 400mL prepared, add the drilling fluid emulsion-type fluid loss agent 1.2g that the above embodiment of the present invention obtains while stirring, make it to be uniformly dispersed, curing in airtight condition 24h at 25 ± 3 DEG C, high-speed stirring 5min, surveys press filtration vector in its normal temperature.
4. in the composite salt water slurry normal temperature of the drilling fluid emulsion-type fluid loss agent obtained according to the above embodiment of the present invention, press filtration vector experiments of measuring is as follows:
the preparation of compound salt-water basic slurry: add 45.0g(by often liter of distilled water and claim accurate to 0.1g) sodium-chlor, 13.0g (claiming accurate to 0.1g) magnesium chloride and 5.0g(claim accurate to 0.1g) Calcium Chloride Powder Anhydrous, after abundant dissolving, add people 150.0g (claim accurate to 0.1g) wilkinite and 9.0g(claims accurate to 0.1g) ratio of anhydrous sodium carbonate, preparation 400mL base slurry, high-speed stirring 20min, at least stop twice therebetween to scrape adhesion wilkinite on the wall, curing in airtight condition 24h at 25 ± 3 DEG C, high-speed stirring 5min, surveys its performance; Make it to meet the requirement of 4% wilkinite fresh water-based slurry in table 6, as do not met, adjustable bentonitic dosage, till meeting.
in composite salt water slurry normal temperature, press filtration vector measures: get the compound salt-water basic slurry 400mL prepared, add the drilling fluid emulsion-type fluid loss agent 6.0g that people's the above embodiment of the present invention obtains while stirring, make it to be uniformly dispersed, curing in airtight condition 24h at 25 ± 3 DEG C, high-speed stirring 5min, surveys press filtration vector in its normal temperature.
5. it is as follows that the drilling fluid emulsion-type fluid loss agent obtained according to the above embodiment of the present invention rolls press filtration vector experiments of measuring in after 16h 160 DEG C of heat:
fresh water-based slurry preparation: claim accurate to 0.1g in adding 40.0g(in often liter of distilled water) wilkinite and 2.40g(claim accurate to 0.01g) ratio of anhydrous sodium carbonate.Preparation 400mL base slurry, high-speed stirring 20min, at least stops twice therebetween, and to scrape adhesion wilkinite on the wall, curing in airtight condition 24h at 25 ± 3 DEG C, then high-speed stirring 5min, survey its performance; Make it to meet the requirement of 4% wilkinite fresh water-based slurry in table 6, as do not met, adjustable bentonitic dosage, till meeting.
fresh water starch 160 DEG C of heat roll 16h after middle press filtration vector measure: get the fresh water-based slurry 400mL prepared, add sample 1.6g while stirring, make it to be uniformly dispersed, after at 160 ± 3 DEG C, heat rolls 16h, high-speed stirring 5min, surveys press filtration vector in its normal temperature.
the assay of the drilling fluid emulsion-type fluid loss agent that the embodiment of the present invention 3 obtains is shown in Table 1; The assay of the drilling fluid emulsion-type fluid loss agent that the embodiment of the present invention 4 obtains is shown in Table 2; The assay of the drilling fluid emulsion-type fluid loss agent that the embodiment of the present invention 5 obtains is shown in Table 3; The assay of the drilling fluid emulsion-type fluid loss agent that the embodiment of the present invention 6 obtains is shown in Table 4; The assay of the drilling fluid emulsion-type fluid loss agent that the embodiment of the present invention 7 obtains is shown in Table 5; The drilling fluid emulsion-type fluid loss agent that the embodiment of the present invention 3 to embodiment 7 obtains all is tested through assistant for drilling petroleum well product quality supervision and inspection station, Xinjiang Uygur Autonomous Regions.Prior art base slurry performance is shown in Table 6; The drilling fluid emulsion-type fluid loss agent obtained according to the above embodiment of the present invention and the comparative analysis of prior art fluid loss agent are shown in Table 7.
can be found out to table 5 by table 1, according to drilling fluid emulsion-type fluid loss agent all conformance with standard requirements that the above embodiment of the present invention obtains, as can be seen from table 6 and table 7, the outward appearance of prior art fluid loss agent is white or faint yellow particle, the outward appearance of the drilling fluid emulsion-type fluid loss agent that the above embodiment of the present invention obtains is homogeneous emulsion, the dissolution time of the drilling fluid emulsion-type fluid loss agent that the above embodiment of the present invention obtains, lubricating coefficient reduced rate, fresh water slurry API filtration, composite salt water slurry API filtration and the API dehydration after 160 DEG C of heat roll 16h of 4% wilkinite fresh water slurry all have raising by a relatively large margin compared with prior art fluid loss agent, illustrate that drilling fluid emulsion-type fluid loss agent of the present invention is fast compared with the dissolution rate of prior art fluid loss agent, high lubricating effect, effectively can reduce the filter loss of mud, temperature resistant antisalt is effective, be conducive to forming mud cake fast, ensure that hydrocarbon zone preserves from, drilling fluid emulsion-type fluid loss agent of the present invention is emulsion-type simultaneously, use more convenient, the waste of resource can not be caused in use procedure, prior art fluid loss agent is mostly polymer powder, which results in the cutting when producing, granulation, oven dry, energy consumption in crushing process is high and easily cause waste, illustrate that drilling fluid emulsion-type fluid loss agent of the present invention uses more convenient compared with prior art fluid loss agent, reduce energy consumption, stopped the waste of resource.
in sum, drilling fluid emulsion-type fluid loss agent of the present invention is fast compared with the dissolution rate of prior art fluid loss agent, high lubricating effect, the filter loss that effectively can reduce mud, temperature resistant antisalt are effective, is conducive to forming mud cake fast, ensures that hydrocarbon zone preserves from; Drilling fluid emulsion-type fluid loss agent of the present invention uses more convenient compared with prior art fluid loss agent simultaneously, reduces energy consumption, has stopped the waste of resource.
above technical characteristic constitutes embodiments of the invention, and it has stronger adaptability and implementation result, can increase and decrease non-essential technical characteristic according to actual needs, meet the demand of different situations.
Claims (10)
1.
a kind of drilling fluid emulsion-type fluid loss agent, is characterized in that raw materials by weight portion contains the monomer of 10 parts to 35 parts, the solvent orange 2 A of 15 parts to 40 parts, the solvent B of 15 parts to 50 parts, the surfactant A of 2 parts to 10 parts, the surfactant B of 2 parts to 20 parts, the conditioning agent of 2 parts to 25 parts, the initiator of 0.02 part to 0.2 part.
2.
drilling fluid emulsion-type fluid loss agent according to claim 1, is characterized in that raw materials by weight portion contains the monomer of 12 parts to 20 parts, the solvent orange 2 A of 30 parts to 35 parts, the solvent B of 23 parts to 25 parts, the surfactant A of 3 parts to 4 parts, the surfactant B of 4 parts to 6 parts, the conditioning agent of 10 parts to 11 parts, the initiator of 0.05 part to 0.2 part.
3.
drilling fluid emulsion-type fluid loss agent according to claim 1 and 2, is characterized in that obtaining as follows: the first step, and the surfactant A adding aequum after the monomer of aequum, solvent orange 2 A and conditioning agent being mixed again mixes and obtains solution A, second step, mixes the solvent B of aequum and surfactant B and obtains solution B, 3rd step, mixes the solution A obtained and the solution B that obtains and obtains pre-emulsion, 4th step, pre-emulsion is sheared through high-shear emulsion machine and is formed microemulsion, microemulsion is added in reactor, the temperature being cooled to microemulsion is 26 DEG C to 40 DEG C, reactor is evacuated to vacuum and is filled with nitrogen in reactor, the initiator of aequum is made into the initiator solution that mass percent is 5% to 10%, then the initiator solution prepared is added in reactor, reactor is evacuated to vacuum again, react under whipped state, when in question response still, temperature of charge rises to 40 DEG C to 60 DEG C, open pressure release valve, drilling fluid emulsion-type fluid loss agent is obtained after still aging 50min to 70min.
4.
drilling fluid emulsion-type fluid loss agent according to claim 3, is characterized in that in the 4th step, reactor is evacuated in vacuum, and the pressure be evacuated in reactor is-0.06MPa to-0.08MPa; Or/and in the 4th step, be filled with in nitrogen in reactor, the pressure of nitrogen in reactor is 0MPa to 0.5MPa; Or/and in the 4th step, react under whipped state, stir speed (S.S.) is 30r/min to 80r/min.
5.
drilling fluid emulsion-type fluid loss agent according to claim 1 or 2 or 3 or 4, is characterized in that monomer is more than one in methacrylic acid, sodium acrylate, acrylamide, 2-acrylamide-2-methylpro panesulfonic acid and ammonium acrylate; Or/and solvent orange 2 A is more than one in deionized water and isooctyl alcohol; Or/and solvent B is mineral oil; Or/and surfactant A is more than one in OP-2, peregal, TX-10, OP-10, Tween20, Tween60 and Tween80; Or/and surfactant B is more than one in AEO-3, SP-20, SP-60, SP80, T152 and T154; Or/and conditioning agent is more than one in ammoniacal liquor, sodium hydroxide, potassium hydroxide and water glass; Or/and initiator is more than one in ammonium persulphate, sodium bisulfite, Diisopropyl azodicarboxylate and benzoyl peroxide.
6.
drilling fluid emulsion-type fluid loss agent according to claim 5, is characterized in that mineral oil is more than one in diesel oil, aviation kerosene, 26# people's tooth oil, whiteruss, Oleum Gossypii semen tankage extractive matter and white oil.
7.
a kind of preparation method of drilling fluid emulsion-type fluid loss agent according to claim 1 and 2, it is characterized in that carrying out in the steps below: the first step, the surfactant A adding aequum after the monomer of aequum, solvent orange 2 A and conditioning agent being mixed again mixes and obtains solution A, second step, mixes the solvent B of aequum and surfactant B and obtains solution B, 3rd step, mixes the solution A obtained and the solution B that obtains and obtains pre-emulsion, 4th step, pre-emulsion is sheared through high-shear emulsion machine and is formed microemulsion, microemulsion is added in reactor, the temperature being cooled to microemulsion is 26 DEG C to 40 DEG C, reactor is evacuated to vacuum and is filled with nitrogen in reactor, the initiator of aequum is made into the initiator solution that mass percent is 5% to 10%, then the initiator solution prepared is added in reactor, reactor is evacuated to vacuum again, react under whipped state, when in question response still, temperature of charge rises to 40 DEG C to 60 DEG C, open pressure release valve, drilling fluid emulsion-type fluid loss agent is obtained after still aging 50min to 70min.
8.
the preparation method of drilling fluid emulsion-type fluid loss agent according to claim 7, is characterized in that in the 4th step, reactor is evacuated in vacuum, and the pressure be evacuated in reactor is-0.06MPa to-0.08MPa; Or/and in the 4th step, be filled with in nitrogen in reactor, the pressure of nitrogen in reactor is 0MPa to 0.5MPa; Or/and in the 4th step, react under whipped state, stir speed (S.S.) is 30r/min to 80r/min.
9.
drilling fluid according to claim 7 or 8 preparation method of emulsion-type fluid loss agent, is characterized in that monomer is more than one in methacrylic acid, sodium acrylate, acrylamide, 2-acrylamide-2-methylpro panesulfonic acid and ammonium acrylate; Or/and solvent orange 2 A is more than one in deionized water and isooctyl alcohol; Or/and solvent B is mineral oil; Or/and surfactant A is more than one in OP-2, peregal, TX-10, OP-10, Tween20, Tween60 and Tween80; Or/and surfactant B is more than one in AEO-3, SP-20, SP-60, SP80, T152 and T154; Or/and conditioning agent is more than one in ammoniacal liquor, sodium hydroxide, potassium hydroxide and water glass; Or/and initiator is more than one in ammonium persulphate, sodium bisulfite, Diisopropyl azodicarboxylate and benzoyl peroxide.
10.
the preparation method of drilling fluid emulsion-type fluid loss agent according to claim 9, is characterized in that mineral oil is more than one in diesel oil, aviation kerosene, 26# people's tooth oil, whiteruss, Oleum Gossypii semen tankage extractive matter and white oil.
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| CN111978937A (en) * | 2020-08-14 | 2020-11-24 | 中国石油天然气集团有限公司 | Temperature-resistant deformable polymer fluid loss additive for drilling fluid and preparation method thereof |
| CN113122210A (en) * | 2020-01-15 | 2021-07-16 | 中国石油化工股份有限公司 | Deep profile control water shutoff agent capable of delaying gelling and preparation and application thereof |
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| CN114686183A (en) * | 2020-12-25 | 2022-07-01 | 中石化石油工程技术服务有限公司 | Lubricating plugging fluid loss additive for drilling fluid and preparation method thereof |
| CN114686183B (en) * | 2020-12-25 | 2023-09-12 | 中石化石油工程技术服务有限公司 | Lubricating plugging filtrate reducer for drilling fluid and preparation method thereof |
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