CN114106257B - Anti-collapse dilution filtrate reducer modified multi-element resin for drilling fluid - Google Patents
Anti-collapse dilution filtrate reducer modified multi-element resin for drilling fluid Download PDFInfo
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- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F283/00—Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass C08G
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- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/02—Well-drilling compositions
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Abstract
An anti-collapse dilution filtrate reducer modified multi-element resin for drilling fluid, which comprises the following raw materials: clear water, ethanol, sulfonated phenolic resin, formaldehyde, p-aminophenol, a cationizing agent, an etherifying agent, acrylamide and an initiator. The cationizing agent is ethyl bromide, 1-bromopropane and 1-bromobutane, and the etherifying agent is 3-chloropropene and 4-chlorobutene. The preparation method comprises the following steps: adding clear water, p-aminophenol and a cationizing agent into a reaction kettle, heating, stirring, refluxing, adjusting the solution to be neutral, adding the cationizing agent into the reaction kettle again, heating, stirring, refluxing, and adjusting the solution to be neutral; putting the sulfonated phenolic resin and formaldehyde into a reaction kettle, and adjusting the pH value of the solution; placing ethanol and an etherifying agent into a reaction kettle, refluxing, adding acrylamide and an initiator, reacting to obtain a gel product, drying and crushing to obtain the product. The invention has good filtration loss reduction performance, has plugging and diluting functions, can effectively inhibit the collapse of the well wall, is beneficial to the maintenance of drilling fluid, and effectively avoids the occurrence of complex drilling accidents.
Description
Technical Field
The invention relates to an oil drilling auxiliary agent, in particular to an anti-collapse dilution fluid loss agent modified multi-element resin for drilling fluid, and also relates to a preparation method of the anti-collapse dilution fluid loss agent modified multi-element resin for drilling fluid.
Background
The drilling fluid is an important circulating fluid for ensuring the safety of the drilling fluid, and the performance of the circulating fluid is related to the drilling quality and safety information. The filtrate reducer in the drilling fluid is an important treating agent, can effectively prevent the drilling fluid from permeating into a stratum and plays a role in stabilizing a well wall.
The inventors searched the following related patent documents: CN112794936A discloses a polymer fluid loss additive for drilling fluid and a preparation method thereof, wherein the polymer fluid loss additive comprises the following components in parts by weight: 4-5 parts of acrylamide, 5-6 parts of sodium p-styrenesulfonate, 5-8 parts of methacrylic acid and 0.5-1 part of graphene oxide, wherein the preparation method comprises the steps of adding the acrylamide, the sodium p-styrenesulfonate and the methacrylic acid into water, stirring uniformly, adding the graphene oxide, and carrying out closed ultrasonic dispersion to obtain a graphene oxide dispersion liquid; adjusting the pH value of the dispersion liquid to 9-12, adding a redox initiator, heating for reaction, reducing the temperature to 30-50 ℃ after the reaction is finished, and curing at constant temperature for 2-5 hours to obtain polymer colloid; the polymer colloid is washed by ethanol and deionized water, dried to constant weight, and crushed and granulated to obtain the filtrate loss reducer. CN110760294A discloses a collapse-preventing fluid loss additive silicon-fluorine resin compound for drilling fluid, which is characterized by consisting of bentonite, galena powder, limestone powder, liquid weighting agent NaCl, sulfomethyl phenolic resin, polysilicone fluorine stabilizer, inert fluid loss additive, carboxymethyl cellulose sodium salt, carboxymethyl starch, methylene polyacrylamide dry powder, tackifying fluid loss additive, sodium alkyl sulfonate, potassium ammonium hydrolyzed polyacrylonitrile, sulfonated asphalt sodium salt, sulfomethyl lignite resin, high molecular polymer collapse-preventing agent, anti-swelling agent, water-based heavy mud diluent, polyacrylamide, collapse-preventing lubricant, high-temperature-resistant salt-resistant fluid loss additive, reservoir shielding agent, dodecyl dimethyl benzyl ammonium chloride, glycerol polyether, diesel oil, basic zinc carbonate and water. CN101560378 discloses an anti-collapse dilution fluid loss additive for drilling fluid, which is characterized by comprising 80-120 parts of humic acid-containing substances, 30-80 parts of sodium metabisulfite, 300-500 parts of water, 10-30 parts of hydrolyzed polyacrylonitrile ammonium salt, 2-15 parts of cross-linking agent, 30-50 parts of potassium hydroxide, 5-20 parts of complexing agent, 1-10 parts of urea and 10-20 parts of organic silicon resin, and the preparation method comprises the steps of adding water, potassium hydroxide, lignite or peat or weathered coal and sodium metabisulfite into a stirring reaction kettle, sealing, heating, reacting and cooling; adding hydrolyzed polyacrylonitrile ammonium salt, a cross-linking agent, a complexing agent, urea and organic silicon resin, sealing, heating, and stirring for reaction; discharging and drying to obtain the anti-collapse dilution filtrate reducer. The inventors searched the following non-patent documents: the product has strong hydration capability, large adsorption capacity to clay and good filtrate reduction performance. [ Xieqing ] grinding of cationic sulfonated phenol-formaldehyde resin [ D ]. formation: southwest university of Petroleum, 2014 ]
The technology provides a guidance scheme for how to obtain the fluid loss additive with high fluid loss performance, and the obtained fluid loss additive has good fluid loss performance, but the performance is single, and multiple performances are difficult to combine. The technologies do not provide a specific guidance scheme for improving the anti-collapse performance and viscosity reduction performance of the drilling fluid filtrate reducer, fully inhibiting borehole wall collapse and avoiding underground complex accidents.
Disclosure of Invention
The invention aims to solve the technical problem of providing an anti-collapse dilution fluid loss additive modified multi-element resin for drilling fluid, which has good fluid loss performance, can inhibit the collapse of a well wall, reduce the viscosity of the drilling fluid, effectively avoid or reduce the occurrence of underground complex accidents, and can meet the technical requirements of fluid loss additives with wider application range in the market.
Therefore, another technical problem to be solved by the invention is to provide a preparation method of the anti-sloughing diluted filtrate reducer modified multi-component resin for the drilling fluid.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows:
the technical scheme is that the anti-collapse dilution filtrate reducer modified multi-element resin for the drilling fluid is prepared from the following raw materials in parts by weight:
the mass fraction is 10% sodium hydroxide aqueous solution, and the dosage of the sodium hydroxide aqueous solution meets the requirement of adjusting to reach the pH value of the solution.
The cationizing agent is one or the combination of two of bromoethane, 1-bromopropane and 1-bromobutane (bromon-butane), and the proportion of the two is arbitrary when the two are combined; the etherifying agent is one of 3-chloropropene and 4-chlorobutene (4-chloro-1-butene).
The preparation method of the collapse-preventing dilution filtrate reducer modified multi-component resin for the drilling fluid comprises the following process steps: adding 1000 parts of clear water, 55-60 parts of p-aminophenol and 10-14 parts of cationizing agent into a reaction kettle, heating to 50-60 ℃, stirring for 30-35 min, refluxing for 30-35 min to obtain a solution (feed liquid) A, adding a 10% sodium hydroxide aqueous solution into the solution A to adjust the solution A to be neutral, then adding 10-14 parts of cationizing agent into the solution A again, stirring for 30-35 min, refluxing for 30-35 min to obtain a solution (feed liquid) B, adding a 10% sodium hydroxide aqueous solution into the solution B to adjust the solution B to be neutral, then adding the rest cationizing agent into the solution B again, stirring for 30-35 min, and refluxing for 30-35 min to obtain a solution (feed liquid) C; secondly, adding 100-120 parts of sulfonated phenolic resin (sulfonated phenolic resin SMP) into the solution C in the reaction kettle, slowly adding 10-15 parts of formaldehyde to obtain a solution (feed liquid) D, adjusting the pH value of the solution D to 9-10 by using a 10% sodium hydroxide aqueous solution, heating to 80-90 ℃, reacting for 2.5-3 hours, cooling to room temperature (25 ℃) to obtain an intermediate product; thirdly, adding 30-50 parts of ethanol and 15-18 parts of etherifying agent into the intermediate product of the reaction kettle, refluxing for 1-1.5 hours, adding 20-25 parts of acrylamide, uniformly stirring, adding 0.7-1.0 part of initiator, and reacting for 1-1.5 hours to obtain a gel product; and fourthly, drying and crushing the gel product obtained in the third step to obtain the collapse-preventing diluted filtrate reducer modified multi-element resin for the drilling fluid.
In the above technical scheme, a preferable technical scheme may be that the initiator is one or two of potassium persulfate and ammonium persulfate, and the ratio of the two is arbitrary when the two are combined.
In the above technical scheme, a preferable technical scheme may also be that the anti-sloughing diluted filtrate reducer modified multi-element resin for drilling fluid is prepared from the following raw materials in parts by weight:
the mass fraction is 10% sodium hydroxide aqueous solution, and the dosage of the sodium hydroxide aqueous solution meets the requirement of adjusting to reach the pH value of the solution. The cationizing agent is 1-bromobutane; the etherifying agent is 3-chloropropene; the initiator is potassium persulfate.
The preparation method of the collapse-preventing dilution filtrate reducer modified multi-component resin for the drilling fluid comprises the following process steps: adding 1000 parts of clear water, 60 parts of p-aminophenol and 10 parts of 1-bromobutane into a reaction kettle, heating to 60 ℃, stirring for 30min, refluxing for 30min to obtain a solution A, adding a 10% sodium hydroxide aqueous solution into the solution A to adjust the solution A to be neutral, then adding 12 parts of 1-bromobutane into the solution A again, stirring for 30min, refluxing for 30min to obtain a solution B, adding a 10% sodium hydroxide aqueous solution into the solution B to adjust the solution B to be neutral, then adding the rest 13 parts of 1-bromobutane into the solution B again, stirring for 30min, and refluxing for 30min to obtain a solution C; adding 100 parts of sulfonated phenolic resin into the solution C in the reaction kettle, slowly adding 10 parts of formaldehyde to obtain a solution D, adjusting the pH value of the solution D to 9 by using a 10% sodium hydroxide aqueous solution, heating to 80 ℃, reacting for 2.5 hours, and cooling to room temperature to obtain an intermediate product; ③ adding 40 parts of ethanol and 15 parts of 3-chloropropene into the intermediate product of the reaction kettle, refluxing for 1h, adding 25 parts of acrylamide, stirring uniformly, adding 1.0 part of potassium persulfate, and reacting for 1h to obtain a gel-like product; and fourthly, drying and crushing the gel product obtained in the third step to obtain the collapse-preventing diluted filtrate reducer modified multi-element resin for the drilling fluid.
In the above technical scheme, a preferable technical scheme may also be that the anti-sloughing diluted filtrate reducer modified multi-element resin for drilling fluid is prepared from the following raw materials in parts by weight:
the mass fraction is 10% sodium hydroxide aqueous solution, and the dosage of the sodium hydroxide aqueous solution meets the requirement of adjusting to reach the pH value of the solution. The cationization agent is a combination of two raw materials of bromoethane and 1-bromopropane, and the mass ratio of the bromoethane to the 1-bromopropane is 1: 1; the etherifying agent is 4-chlorobutene; the initiator is ammonium persulfate.
The preparation method of the anti-sloughing diluted filtrate reducer modified multi-element resin for the drilling fluid comprises the following process steps: adding 1000 parts of clean water, 55 parts of p-aminophenol, 6 parts of bromoethane and 6 parts of 1-bromopropane into a reaction kettle, heating to 60 ℃, stirring for 30min, refluxing for 30min to obtain a solution A, adding a 10% sodium hydroxide aqueous solution into the solution A to adjust the solution A to be neutral, then adding 7 parts of bromoethane and 7 parts of 1-bromopropane into the solution A again, stirring for 30min, refluxing for 30min to obtain a solution B, adding a 10% sodium hydroxide aqueous solution into the solution B to adjust the solution B to be neutral, then adding the rest 7 parts of bromoethane and 7 parts of 1-bromopropane into the solution B again, stirring for 30min, and refluxing for 30min to obtain a solution C; adding 110 parts of sulfonated phenolic resin into the solution C in the reaction kettle, slowly adding 15 parts of formaldehyde to obtain a solution D, adjusting the pH value of the solution D to 10 by using a 10% sodium hydroxide aqueous solution, heating to 85 ℃, reacting for 2.5 hours, and cooling to room temperature to obtain an intermediate product; thirdly, adding 35 parts of ethanol and 18 parts of 4-chlorobutene into the intermediate product of the reaction kettle, refluxing for 1 hour, adding 23 parts of acrylamide, stirring uniformly, adding 0.8 part of ammonium persulfate, and reacting for 1 hour to obtain a gel-like product; and fourthly, drying and crushing the gel product obtained in the third step to obtain the collapse-preventing diluted filtrate reducer modified multi-component resin for the drilling fluid.
In the above technical scheme, a preferable technical scheme may also be that the anti-sloughing diluted filtrate reducer modified multi-element resin for drilling fluid is prepared from the following raw materials in parts by weight:
the mass fraction is 10% sodium hydroxide aqueous solution, and the dosage of the sodium hydroxide aqueous solution meets the requirement of adjusting to reach the pH value of the solution. The cationization agent is a combination of two raw materials of ethyl bromide and 1-bromobutane, and the mass ratio of the ethyl bromide to the 1-bromobutane is 2: 1; the etherifying agent is 3-chloropropene; the initiator is a combination of two raw materials of ammonium persulfate and potassium persulfate, and the mass ratio of the ammonium persulfate to the potassium persulfate is 1: 1.
the preparation method of the collapse-preventing dilution filtrate reducer modified multi-component resin for the drilling fluid comprises the following process steps: adding 1000 parts of clean water, 58 parts of p-aminophenol, 6.7 parts of bromoethane and 3.3 parts of 1-bromobutane into a reaction kettle, heating to 60 ℃, stirring for 30min, refluxing for 30min to obtain a solution A, adding a 10% sodium hydroxide aqueous solution into the solution A to adjust the solution A to be neutral, then adding 6.7 parts of bromoethane and 3.3 parts of 1-bromobutane into the solution A again, stirring for 30min, refluxing for 30min to obtain a solution B, adding a 10% sodium hydroxide aqueous solution into the solution B to adjust the solution B to be neutral, then adding the rest 6.7 parts of bromoethane and 3.3 parts of 1-bromobutane into the solution B again, stirring for 30min, and refluxing for 30min to obtain a solution C; adding 110 parts of sulfonated phenolic resin into the solution C in the reaction kettle, slowly adding 12 parts of formaldehyde to obtain a solution D, adjusting the pH value of the solution D to 9 by using a 10% sodium hydroxide aqueous solution, heating to 90 ℃, reacting for 2.5 hours, and cooling to room temperature to obtain an intermediate product; thirdly, adding 50 parts of ethanol and 17 parts of 3-chloropropene into the intermediate product of the reaction kettle, refluxing for 1 hour, adding 20 parts of acrylamide, stirring uniformly, adding 0.35 part of potassium persulfate and 0.35 part of ammonium persulfate, and reacting for 1 hour to obtain a gel-like product; and fourthly, drying and crushing the gel product obtained in the third step to obtain the collapse-preventing diluted filtrate reducer modified multi-element resin for the drilling fluid.
The components (raw materials) of the drilling fluid additive are commercial products, and the addition amount (dosage) of the drilling fluid additive is 2.0-2.5% (mass percentage).
The invention provides an anti-sloughing diluted filtrate reducer multi-element modified resin for drilling fluid and a preparation method thereof, wherein the preparation method comprises the following steps: preparing a cationic monomer, preparing a cationic modified sulfonated phenolic resin, preparing a multi-element modified resin, and drying and crushing the multi-element modified resin. The anti-collapse dilution filtrate reducer multi-modified resin for the drilling fluid has good performance, and is shown in a table 1 in the following of the specification. The performance of the invention is as follows: the pH value of the 1% aqueous solution is 7-10; the viscosity reduction rate in the base slurry at room temperature is more than or equal to 70.0 percent, and the low-temperature low-pressure filtration loss is less than or equal to 12.0 mL; the viscosity reduction rate after aging at 180 ℃ is more than or equal to 60.0 percent, the low-temperature and low-pressure filtration loss is less than or equal to 12.0mL, and the high-temperature and high-pressure filtration loss is less than or equal to 25.0 mL; the linear expansion reduction rate of the core is more than or equal to 40.0 percent. The filtrate loss reducing agent has good filtrate loss reducing performance, good viscosity reducing and anti-collapse performance, and the raw materials are easy to purchase, the process is simple, the realization is easy, and the large-scale production and popularization can be realized.
In conclusion, the filtrate loss reducing agent has good filtrate loss reducing performance, simultaneously has good viscosity reducing and anti-collapse performance, is suitable for a water-based drilling fluid system, can effectively avoid or reduce the occurrence of complex accidents in the well, improves the drilling quality and safety, has good filtrate loss reducing performance at a high temperature of 180 ℃, and meets the technical requirements of filtrate loss reducing agents with wider application range on the market.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the embodiments. It is to be understood that the embodiments described are only a few, and not all embodiments of the invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
Example 1: the anti-collapse dilution filtrate reducer multi-element modified resin for the drilling fluid is prepared from the following raw materials in parts by weight:
the mass fraction is 10% sodium hydroxide aqueous solution, and the dosage of the sodium hydroxide aqueous solution meets the requirement of adjusting to reach the pH value of the solution. The cationizing agent is 1-bromobutane; the etherifying agent is 3-chloropropene; the initiator is potassium persulfate.
The preparation method of the collapse-preventing dilution filtrate reducer modified multi-component resin for the drilling fluid comprises the following process steps: adding 1000 parts of clear water, 60 parts of p-aminophenol and 10 parts of 1-bromobutane into a reaction kettle, heating to 60 ℃, stirring for 30min, refluxing for 30min to obtain a solution A, adding a 10% sodium hydroxide aqueous solution into the solution A to adjust the solution A to be neutral, then adding 12 parts of 1-bromobutane into the solution A again, stirring for 30min, refluxing for 30min to obtain a solution B, adding a 10% sodium hydroxide aqueous solution into the solution B to adjust the solution B to be neutral, then adding the rest 13 parts of 1-bromobutane into the solution B again, stirring for 30min, and refluxing for 30min to obtain a solution C; adding 100 parts of sulfonated phenolic resin into the solution C in the reaction kettle, slowly adding 10 parts of formaldehyde to obtain a solution D, adjusting the pH value of the solution D to 9 by using a 10% sodium hydroxide aqueous solution, heating to 80 ℃, reacting for 2.5 hours, and cooling to room temperature to obtain an intermediate product; ③ adding 40 parts of ethanol and 15 parts of 3-chloropropene into the intermediate product of the reaction kettle, refluxing for 1h, adding 25 parts of acrylamide, stirring uniformly, adding 1.0 part of potassium persulfate, and reacting for 1h to obtain a gel-like product; and fourthly, drying and crushing the gel product obtained in the third step to obtain the collapse-preventing diluted filtrate reducer modified multi-element resin for the drilling fluid.
Example 2: the anti-collapse dilution filtrate reducer multi-element modified resin for the drilling fluid is prepared from the following raw materials in parts by weight:
the mass fraction is 10% sodium hydroxide aqueous solution, and the dosage of the sodium hydroxide aqueous solution meets the requirement of adjusting the pH value of the solution. The cationization agent is a combination of two raw materials of bromoethane and 1-bromopropane, and the mass ratio of the bromoethane to the 1-bromopropane is 1: 1; the etherifying agent is 4-chlorobutene; the initiator is ammonium persulfate.
The preparation method of the collapse-preventing dilution filtrate reducer modified multi-component resin for the drilling fluid comprises the following process steps: adding 1000 parts of clean water, 55 parts of p-aminophenol, 6 parts of bromoethane and 6 parts of 1-bromopropane into a reaction kettle, heating to 60 ℃, stirring for 30min, refluxing for 30min to obtain a solution A, adding a 10% sodium hydroxide aqueous solution into the solution A to adjust the solution A to be neutral, then adding 7 parts of bromoethane and 7 parts of 1-bromopropane into the solution A again, stirring for 30min, refluxing for 30min to obtain a solution B, adding a 10% sodium hydroxide aqueous solution into the solution B to adjust the solution B to be neutral, then adding the rest 7 parts of bromoethane and 7 parts of 1-bromopropane into the solution B again, stirring for 30min, and refluxing for 30min to obtain a solution C; adding 110 parts of sulfonated phenolic resin into the solution C in the reaction kettle, slowly adding 15 parts of formaldehyde to obtain a solution D, adjusting the pH value of the solution D to 10 by using a 10% sodium hydroxide aqueous solution, heating to 85 ℃, reacting for 2.5 hours, and cooling to room temperature to obtain an intermediate product; thirdly, adding 35 parts of ethanol and 18 parts of 4-chlorobutene into the intermediate product of the reaction kettle, refluxing for 1 hour, adding 23 parts of acrylamide, stirring uniformly, adding 0.8 part of ammonium persulfate, and reacting for 1 hour to obtain a gel-like product; and fourthly, drying and crushing the gel product obtained in the third step to obtain the collapse-preventing diluted filtrate reducer modified multi-component resin for the drilling fluid.
Example 3: the anti-collapse dilution filtrate reducer modified multi-element resin for the drilling fluid is prepared from the following raw materials in parts by weight:
the mass fraction is 10% sodium hydroxide aqueous solution, and the dosage of the sodium hydroxide aqueous solution meets the requirement of adjusting to reach the pH value of the solution. The cationization agent is a combination of two raw materials of ethyl bromide and 1-bromobutane, and the mass ratio of the ethyl bromide to the 1-bromobutane is 2: 1; the etherifying agent is 3-chloropropene; the initiator is a combination of two raw materials of ammonium persulfate and potassium persulfate, wherein the mass ratio of the ammonium persulfate to the potassium persulfate is 1: 1.
the preparation method of the collapse-preventing dilution filtrate reducer modified multi-component resin for the drilling fluid comprises the following process steps: adding 1000 parts of clean water, 58 parts of p-aminophenol, 6.7 parts of bromoethane and 3.3 parts of 1-bromobutane into a reaction kettle, heating to 60 ℃, stirring for 30min, refluxing for 30min to obtain a solution A, adding a 10% sodium hydroxide aqueous solution into the solution A to adjust the solution A to be neutral, then adding 6.7 parts of bromoethane and 3.3 parts of 1-bromobutane into the solution A again, stirring for 30min, refluxing for 30min to obtain a solution B, adding a 10% sodium hydroxide aqueous solution into the solution B to adjust the solution B to be neutral, then adding the rest 6.7 parts of bromoethane and 3.3 parts of 1-bromobutane into the solution B again, stirring for 30min, and refluxing for 30min to obtain a solution C; adding 110 parts of sulfonated phenolic resin into the solution C in the reaction kettle, slowly adding 12 parts of formaldehyde to obtain a solution D, adjusting the pH value of the solution D to 9 by using a 10% sodium hydroxide aqueous solution, heating to 90 ℃, reacting for 2.5 hours, and cooling to room temperature to obtain an intermediate product; thirdly, adding 50 parts of ethanol and 17 parts of 3-chloropropene into the intermediate product of the reaction kettle, refluxing for 1 hour, adding 20 parts of acrylamide, stirring uniformly, adding 0.35 part of potassium persulfate and 0.35 part of ammonium persulfate, and reacting for 1 hour to obtain a gel-like product; and fourthly, drying and crushing the gel product obtained in the third step to obtain the collapse-preventing diluted filtrate reducer modified multi-element resin for the drilling fluid.
The addition amount of the anti-collapse dilution filtrate reducer modified multi-element resin for the drilling fluid in the water-based drilling fluid is 2.0-2.5 percent (mass percentage).
The following are the experimental part of the invention:
pH value: weighing 1.00g of sample, placing the sample in a 150mL beaker, adding 100mL of distilled water, stirring the sample by using a glass rod until the sample is dissolved, standing the sample for 5min, immersing the test paper in the test solution for 0.5s, taking out the test paper, and comparing the test paper with a color plate to obtain the pH value, wherein the test result is shown in Table 1.
Preparation of base slurry (water base): adding 0.84g of sodium carbonate and 0.30g of sodium hydroxide into 400mL of clear water, stirring for 10min at 11000r/min, slowly adding 24.00g of bentonite for drilling fluid, stirring for 20min at 8000r/min, and sealing and maintaining for 24 h.
Taking one part of prepared base pulp, stirring for 5min at 11000r/min, and testing the phi of the base pulp according to the method specified in GB/T16783.1-2014100And (4) reading the value.
Room temperature slurry properties: taking a part of prepared base pulp, slowly adding 10.00g of sample in the stirring process at 11000r/min, and measuring phi of the sample pulp according to the method specified in GB/T16783.1-2014100The reading value and the low-temperature low-pressure filtration loss are shown in the table 1.
Performance of the slurry after hot rolling at 180 ℃: taking a prepared part of base slurry, slowly adding 10.00g of sample in the stirring process at 11000r/min, transferring into an aging tank, introducing nitrogen at 0.7MPa for 30s, putting the aging tank into a roller heating furnace, and hot rolling for 16h at 180 +/-5 ℃. Cooling to room temperature, stirring at 11000r/min for 5min, and testing Phi of the sample slurry according to the method specified in GB/T16783.1-2014100The values, the low-temperature and low-pressure filtration loss and the high-temperature and high-pressure filtration loss (180 ℃, 3.5MPa differential pressure) are read, and the test results are shown in Table 1.
The viscosity reduction rate was calculated by the following formula:
in the formula:
DI-viscosity reduction, expressed as a percentage (%);
Φ100reading the base pulp at 100 r/min;
Φ100 1the reading at 100r/min of the sample slurry.
Testing the linear expansion reduction rate of the core: 5.00g of the sample was weighed into a 250mL beaker, 100mL of distilled water was added to the beaker, and the mixture was stirred on a magnetic stirrer for 30 min. Weighing 10.00g of bentonite for drilling fluid expansion test after drying for 4 hours at 105 +/-2 ℃, loading into a measuring cylinder of a shale expansion instrument with filter paper at the bottom, inserting a core plunger into the measuring cylinder, placing on a press, slowly pressurizing to 4.0MPa and keeping for 5 minutes. And (3) taking down the core plunger, carefully removing the bentonite which is not compacted on the surface layer of the core in the measuring cylinder, mounting the measuring cylinder on a shale expansion tester, filling the measuring cylinder with the solution of the sample to be tested, and recording the linear expansion amount of the core for 8 hours. While a blank test was performed with distilled water. The test results are shown in Table 1.
The viscosity reduction rate was calculated by the following formula:
in the formula:
y-core linear expansion reduction, expressed as a percentage (%);
h, linear expansion of the core of the sample solution, and the unit is millimeter (mm);
H1linear core swell in millimeters (mm) for distilled water.
Table 1 shows the performance measurement results of the anti-collapse diluted filtrate reducer modified multicomponent resin for drilling fluid prepared in (above) examples.
TABLE 1 determination results of properties of anti-sloughing diluted filtrate reducer modified multi-component resin for drilling fluid prepared in each example
As can be seen from Table 1: the anti-collapse dilution filtrate reducer modified multi-component resin for the drilling fluid prepared by the embodiments of the invention can achieve good performance effect. The addition amount of the drilling fluid in the invention is 2.0-2.5%. The performance of the invention is as follows: the pH value of the 1% aqueous solution is 7-10; the viscosity reduction rate in the base slurry at room temperature is more than or equal to 70.0 percent, and the low-temperature low-pressure filtration loss is less than or equal to 12.0 mL; the viscosity reduction rate after aging at 180 ℃ is more than or equal to 60.0 percent, the low-temperature and low-pressure filtration loss is less than or equal to 12.0mL, and the high-temperature and high-pressure filtration loss is less than or equal to 25.0 mL; the linear expansion reduction rate of the core is more than or equal to 40.0 percent. The filtrate loss reducing agent has good filtrate loss reducing performance, good viscosity reducing and anti-collapse performance, and the raw materials are easy to purchase, the process is simple, the realization is easy, and the large-scale production and popularization can be realized.
In conclusion, the embodiments of the invention have good performance, good fluid loss performance of products, good viscosity and collapse reducing performance, can effectively avoid or reduce the occurrence of complex accidents in the well, improve the drilling quality and safety, have good fluid loss performance (good high temperature resistance) at a high temperature of 180 ℃, and meet the technical requirements of fluid loss reducers with wider application range in the market.
Claims (5)
1. An anti-collapse dilution filtrate reducer modified multi-element resin for drilling fluid is characterized by being prepared from the following raw materials in parts by weight:
the mass fraction of the sodium hydroxide aqueous solution is 10 percent, and the dosage of the sodium hydroxide aqueous solution meets the requirement of adjusting the pH value of the solution;
the cationization agent is one or the combination of two of bromoethane, 1-bromopropane and 1-bromobutane, and the proportion of the two is arbitrary when the two are combined; the etherifying agent is one of 3-chloropropene and 4-chlorobutene;
the preparation method of the collapse-preventing dilution filtrate reducer modified multi-component resin for the drilling fluid comprises the following process steps: adding 1000 parts of clear water, 55-60 parts of p-aminophenol and 10-14 parts of cationizing agent into a reaction kettle, heating to 50-60 ℃, stirring for 30-35 min, refluxing for 30-35 min to obtain a solution A, adding a 10% sodium hydroxide aqueous solution into the solution A to adjust the solution A to be neutral, then adding 10-14 parts of cationizing agent into the solution A again, stirring for 30-35 min, refluxing for 30-35 min to obtain a solution B, adding a 10% sodium hydroxide aqueous solution into the solution B to adjust the solution B to be neutral, then adding the rest cationizing agent into the solution B again, stirring for 30-35 min, and refluxing for 30-35 min to obtain a solution C; secondly, adding 100-120 parts of sulfonated phenolic resin into the solution C in the reaction kettle, slowly adding 10-15 parts of formaldehyde to obtain a solution D, adjusting the pH value of the solution D to 9-10 by using a 10% sodium hydroxide aqueous solution, heating to 80-90 ℃, reacting for 2.5-3 hours, and cooling to room temperature to obtain an intermediate product; thirdly, adding 30-50 parts of ethanol and 15-18 parts of etherifying agent into the intermediate product of the reaction kettle, refluxing for 1-1.5 h, adding 20-25 parts of acrylamide, stirring uniformly, adding 0.7-1.0 part of initiator, and reacting for 1-1.5 h to obtain a gel product; and fourthly, drying and crushing the gel product obtained in the third step to obtain the collapse-preventing diluted filtrate reducer modified multi-element resin for the drilling fluid.
2. The anti-collapse dilution filtrate reducer modified multi-element resin for the drilling fluid as claimed in claim 1, wherein the initiator is one or two of potassium persulfate and ammonium persulfate, and the proportion of the two in combination is arbitrary.
3. The anti-collapse dilution filtrate reducer modified multi-element resin for the drilling fluid as claimed in claim 1, which is characterized by being prepared from the following raw materials in parts by weight:
the mass fraction of the sodium hydroxide aqueous solution is 10 percent, and the dosage of the sodium hydroxide aqueous solution meets the requirement of adjusting the pH value of the solution;
the cationizing agent is 1-bromobutane; the etherifying agent is 3-chloropropene; the initiator is potassium persulfate;
the preparation method of the collapse-preventing dilution filtrate reducer modified multi-component resin for the drilling fluid comprises the following process steps: adding 1000 parts of clear water, 60 parts of p-aminophenol and 10 parts of 1-bromobutane into a reaction kettle, heating to 60 ℃, stirring for 30min, refluxing for 30min to obtain a solution A, adding a 10% sodium hydroxide aqueous solution into the solution A to adjust the solution A to be neutral, then adding 12 parts of 1-bromobutane into the solution A again, stirring for 30min, refluxing for 30min to obtain a solution B, adding a 10% sodium hydroxide aqueous solution into the solution B to adjust the solution B to be neutral, then adding the rest 13 parts of 1-bromobutane into the solution B again, stirring for 30min, and refluxing for 30min to obtain a solution C; adding 100 parts of sulfonated phenolic resin into the solution C in the reaction kettle, slowly adding 10 parts of formaldehyde to obtain a solution D, adjusting the pH value of the solution D to 9 by using a 10% sodium hydroxide aqueous solution, heating to 80 ℃, reacting for 2.5 hours, and cooling to room temperature to obtain an intermediate product; ③ adding 40 parts of ethanol and 15 parts of 3-chloropropene into the intermediate product of the reaction kettle, refluxing for 1h, adding 25 parts of acrylamide, stirring uniformly, adding 1.0 part of potassium persulfate, and reacting for 1h to obtain a gel-like product; and fourthly, drying and crushing the gel product obtained in the third step to obtain the collapse-preventing diluted filtrate reducer modified multi-element resin for the drilling fluid.
4. The anti-sloughing diluted filtrate reducer modified multi-element resin for the drilling fluid as claimed in claim 1 is characterized in that it is prepared by the following raw materials by weight proportion:
the mass fraction of the sodium hydroxide aqueous solution is 10 percent, and the dosage of the sodium hydroxide aqueous solution meets the requirement of adjusting the pH value of the solution;
the cationization agent is a combination of two raw materials of bromoethane and 1-bromopropane, and the mass ratio of the bromoethane to the 1-bromopropane is 1: 1; the etherifying agent is 4-chlorobutene; the initiator is ammonium persulfate;
the preparation method of the collapse-preventing dilution filtrate reducer modified multi-component resin for the drilling fluid comprises the following process steps: adding 1000 parts of clean water, 55 parts of p-aminophenol, 6 parts of bromoethane and 6 parts of 1-bromopropane into a reaction kettle, heating to 60 ℃, stirring for 30min, refluxing for 30min to obtain a solution A, adding a 10% sodium hydroxide aqueous solution into the solution A to adjust the solution A to be neutral, then adding 7 parts of bromoethane and 7 parts of 1-bromopropane into the solution A again, stirring for 30min, refluxing for 30min to obtain a solution B, adding a 10% sodium hydroxide aqueous solution into the solution B to adjust the solution B to be neutral, then adding the rest 7 parts of bromoethane and 7 parts of 1-bromopropane into the solution B again, stirring for 30min, and refluxing for 30min to obtain a solution C; adding 110 parts of sulfonated phenolic resin into the solution C in the reaction kettle, slowly adding 15 parts of formaldehyde to obtain a solution D, adjusting the pH value of the solution D to 10 by using a 10% sodium hydroxide aqueous solution, heating to 85 ℃, reacting for 2.5 hours, and cooling to room temperature to obtain an intermediate product; thirdly, adding 35 parts of ethanol and 18 parts of 4-chlorobutene into the intermediate product of the reaction kettle, refluxing for 1 hour, adding 23 parts of acrylamide, stirring uniformly, adding 0.8 part of ammonium persulfate, and reacting for 1 hour to obtain a gel-like product; and fourthly, drying and crushing the gel product obtained in the third step to obtain the collapse-preventing diluted filtrate reducer modified multi-element resin for the drilling fluid.
5. The anti-collapse dilution filtrate reducer modified multi-element resin for the drilling fluid as claimed in claim 1, which is characterized by being prepared from the following raw materials in parts by weight:
the mass fraction of the sodium hydroxide aqueous solution is 10 percent, and the dosage of the sodium hydroxide aqueous solution meets the requirement of adjusting the pH value of the solution;
the cationization agent is a combination of two raw materials of bromoethane and 1-bromobutane, and the mass ratio of the bromoethane to the 1-bromobutane is 2: 1; the etherifying agent is 3-chloropropene; the initiator is a combination of two raw materials of ammonium persulfate and potassium persulfate, and the mass ratio of the ammonium persulfate to the potassium persulfate is 1: 1;
the preparation method of the collapse-preventing dilution filtrate reducer modified multi-component resin for the drilling fluid comprises the following process steps: adding 1000 parts of clean water, 58 parts of p-aminophenol, 6.7 parts of bromoethane and 3.3 parts of 1-bromobutane into a reaction kettle, heating to 60 ℃, stirring for 30min, refluxing for 30min to obtain a solution A, adding a 10% sodium hydroxide aqueous solution into the solution A to adjust the solution A to be neutral, then adding 6.7 parts of bromoethane and 3.3 parts of 1-bromobutane into the solution A again, stirring for 30min, refluxing for 30min to obtain a solution B, adding a 10% sodium hydroxide aqueous solution into the solution B to adjust the solution B to be neutral, then adding the rest 6.7 parts of bromoethane and 3.3 parts of 1-bromobutane into the solution B again, stirring for 30min, and refluxing for 30min to obtain a solution C; adding 110 parts of sulfonated phenolic resin into the solution C in the reaction kettle, slowly adding 12 parts of formaldehyde to obtain a solution D, adjusting the pH value of the solution D to 9 by using a 10% sodium hydroxide aqueous solution, heating to 90 ℃, reacting for 2.5 hours, and cooling to room temperature to obtain an intermediate product; thirdly, adding 50 parts of ethanol and 17 parts of 3-chloropropene into the intermediate product of the reaction kettle, refluxing for 1 hour, adding 20 parts of acrylamide, stirring uniformly, adding 0.35 part of potassium persulfate and 0.35 part of ammonium persulfate, and reacting for 1 hour to obtain a gel-like product; and fourthly, drying and crushing the gel product obtained in the third step to obtain the collapse-preventing diluted filtrate reducer modified multi-element resin for the drilling fluid.
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