CN103305194A - Synthesis method of polymer type drilling fluid viscosity reducer - Google Patents
Synthesis method of polymer type drilling fluid viscosity reducer Download PDFInfo
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- CN103305194A CN103305194A CN2013102567144A CN201310256714A CN103305194A CN 103305194 A CN103305194 A CN 103305194A CN 2013102567144 A CN2013102567144 A CN 2013102567144A CN 201310256714 A CN201310256714 A CN 201310256714A CN 103305194 A CN103305194 A CN 103305194A
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- acrylamide
- drilling fluid
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Abstract
The invention discloses a synthesis method of a polymer type drilling fluid viscosity reducer. According to the technical scheme, the synthesis method comprises the following steps of: dissolving reacting monomers, namely, 2-acrylamide-2-methylpropanesulfonic acid, acrylamide and itaconic acid, into clean water based on the quality relative ratio of (1-6): (1-5): (1-2); dissolving an initiator accounting for 0.1 to 0.9% of the mass of the monomer into the water; adjusting pH (Potential of Hydrogen) to 5; heating to reach 40 to 80 DEG C; reacting for 2 to 16 hours to obtain a viscosity reducer containing 10 to 04% of monomer; and then crushing and drying to obtain the viscosity reducer product. The obtained viscosity reducer is high in viscosity reducing performance in FA-367-containing bentonite and resistant to high temperature and also has good effect in a freshwater system. The viscosity reducer has the characteristics of simple synthesis process, common experimental material and good viscosity reducing effect.
Description
Technical field
The present invention relates to a kind of polymer-type drilling fluid thinner and synthetic method thereof, be specifically related to the synthetic method of oil exploration drilling drilling fluid additive that process is used, belong to the synthesis of polymer material field.
Background technology
Along with the increase of energy demand and the development of drilling technique, China is also more and more for the exploration exploitation of deep-well and ultra deep well, requires employed oilfield treatments agent also can adapt to the field conditions of deep-well and ultra deep well.Especially, with the intensification of landing surface, the rising of temperature, the viscosity that salt contamination, calcium are invaded, the solid load increase causes drilling fluid increases, and shear force increases.So in the drilling fluid maintenance process, need to add viscosity-depression agent, make it have certain rheological simultaneously in order to viscosity and the shear force that reduces drilling fluid system.
Drilling fluid thinner can be divided into decentralized viscosity-depression agent and polymer-type viscosity-depression agent according to the difference of its mechanism of action.The decentralized viscosity-depression agent mainly contains tannins and lignosulfonic acid salt, and the polymer-type viscosity-depression agent mainly comprises copolymer type polymer viscosity reducer and low-molecular(weight)polymer viscosity-depression agent.Tannins viscosity-depression agent salt resistance, anticalcium effect are relatively poor, and viscosity reducing effect just obviously descends when saltiness surpasses 1%.The lignosulfonic acid salt viscosity-depression agent that with the feero-chromo-lignosulfonate is representative is the maximum viscosity-depression agent of domestic and international usage quantity in very long one period, and its temperature resistance, anti-salt and anticalcium performance are all very outstanding, and is also fine with other the compatibleness of additive for drilling fluid.But find to contain in the feero-chromo-lignosulfonate heavy metal chromium recent years, all can cause certain pollution to environment in its preparation with when using, therefore can to replace the Chrome-free viscosity-depression agent of feero-chromo-lignosulfonate be necessary in development.The decentralized viscosity-depression agent can only effectively reduce the yield value of drilling fluid, and plastic viscosity is reduced.The polymer-type viscosity-depression agent can also strengthen the ability that drilling fluid suppresses the stratum pulping when reducing yield value and plastic viscosity.So development polymer-type drilling fluid thinner can be realized not having and poison the effect that reduces drilling fluid system viscosity, and good combination property.
In addition, drilling fluid thinner can also be classified according to its raw-material difference.The starting material source of viscosity-depression agent mainly is xylogen, synthetic polymer, Mierocrystalline cellulose, humic acid, tannin etc.So drilling fluid thinner also can be divided into natural high polymer viscosity-depression agent, modified natural superpolymer viscosity-depression agent, synthetic high polymer viscosity-depression agent, inorganic viscosity-depression agent.Natural high polymer viscosity-depression agent temperature resistance is poor; But a little less than the higher saline-alkaline tolerance of modified natural superpolymer viscosity-depression agent temperature resistance; Inorganic viscosity-depression agent heat and salinity tolerance ability some, the organosilicon viscosity-depression agent has temperature resistance preferably, but maintenance intervals is short, cost is higher; The synthetic high polymer viscosity-depression agent, the general polymer mud system that only is used for.The polymer-type drilling fluid thinner of development can have positive effect to the high viscosity that is caused by high molecular polymer, also can reduce the viscosity of water mud system to a certain extent.
Summary of the invention
The object of the present invention is to provide a kind of synthetic method of polymer-type drilling fluid thinner, overcome the shortcoming of decentralized viscosity-depression agent, can resist certain high temperature, anti-calcium and anti-salt has certain effect, and good viscosity reducing effect is arranged in containing the bentonite slurry of FA-367.The present invention finishes by the following technical programs.
The synthetic method of polymer-type drilling fluid thinner, may further comprise the steps: reaction monomers acrylamide (AM), 2-acrylamido-2-methyl propane sulfonic acid (AMPS), three kinds of monomers of methylene-succinic acid (IA) are mixed with mol ratio 1-6:1-5:1-2, and it is soluble in water, monomer concentration is at 10-40%, add the initiator that accounts for monomer mass 0.1%-0.9%, initiator is ammonium persulphate and sodium bisulfite.Initiator ammonium persulfate and sodium bisulfite mass ratio are 1:1, and pH is 5 with NaOH solution regulation system, and reaction is 2-16 hour under 40-80 ℃ of temperature, purify, and oven dry is pulverized and namely got viscosity-depression agent.
Polymer-type drilling fluid thinner of the present invention can effectively reduce the high viscosity of polymer mud, also can reach good viscosity reducing effect for fresh water base slurry.Product of the present invention, its structural formula is:
Product of the present invention, its reaction equation is:
Description of drawings
Fig. 1 is the infrared spectrogram of this sintetics.
Specific implementation method
Embodiment 1
In the there-necked flask that thermometer, reflux condensing tube and stirrer are housed, add acrylamide 4.26g, 2-acrylamido-2-methyl propane sulfonic acid 4.14g, methylene-succinic acid 2.6g, adding 33mL distilled water again in the there-necked flask stirs, regulate pH=5.0 with sodium hydroxide, be heated with stirring to 60 ℃ of temperature, add ammonium persulphate and sodium bisulfite 0.033g altogether, react stopped reaction after 4 hours.The purification of thick liquid in the reactor, oven dry, pulverizing are namely obtained the polymer-type viscosity-depression agent.In containing the bentonite slurry of FA-367, viscosity break ratio reaches 82.75% in the time of 50 ℃, through 180 ℃ aging after, viscosity break ratio reaches 75%.In water mud, viscosity break ratio reaches 91.67% in the time of 50 ℃.
Embodiment 2
In the there-necked flask that thermometer, reflux condensing tube and stirrer are housed, add acrylamide 1.775g, 2-acrylamido-2-methyl propane sulfonic acid 5.175g, methylene-succinic acid 6.5g, adding 53.8mL distilled water again in the there-necked flask stirs, regulate pH=5.0 with sodium hydroxide, be heated with stirring to 60 ℃ of temperature, add ammonium persulphate and sodium bisulfite 0.0404g altogether, react stopped reaction after 4 hours.The purification of thick liquid in the reactor, oven dry, pulverizing are namely obtained the polymer-type viscosity-depression agent.In containing the bentonite slurry of FA-367, viscosity break ratio reaches 87.67% in the time of 50 ℃, through 180 ℃ aging after, viscosity break ratio reaches 80%.In water mud, viscosity break ratio reaches 94.44% in the time of 50 ℃.
Embodiment 3
In the there-necked flask that thermometer, reflux condensing tube and stirrer are housed, add acrylamide 1.42g, 2-acrylamido-2-methyl propane sulfonic acid 8.28g, methylene-succinic acid 5.2g, adding 59.6mL distilled water again in the there-necked flask stirs, regulate pH=5.0 with sodium hydroxide, be heated with stirring to 60 ℃ of temperature, add ammonium persulphate and sodium bisulfite 0.0447g altogether, react stopped reaction after 4 hours.The purification of thick liquid in the reactor, oven dry, pulverizing are namely obtained the polymer-type viscosity-depression agent.In containing the bentonite slurry of FA-367, viscosity break ratio reaches 84.48% in the time of 50 ℃, through 180 ℃ aging after, viscosity break ratio reaches 80%.In fresh water base slurry, viscosity break ratio reaches 93.33% in the time of 50 ℃.
Claims (6)
1. a polymer-type drilling fluid thinner is to be generated through copolyreaction by 2-acrylamido-2-methyl propane sulfonic acid, acrylamide, methylene-succinic acid, and its molecular weight is after testing between 5000-30000.
2. viscosity-depression agent as claimed in claim 1, it is characterized in that: acrylamide: 2-acrylamido-2-methyl propane sulfonic acid: the mol ratio of methylene-succinic acid is 1-6:1-5:1-2.
3. the synthetic method of claim 1 or 2 described viscosity-depression agents, it is characterized in that: 2-acrylamido-2-methyl propane sulfonic acid, acrylamide, three kinds of monomers of methylene-succinic acid are mixed, and it is soluble in water, monomer concentration is at 10-40%, add initiator, reaction is 2-16 hour under 40-80 ℃ of temperature, purifies, oven dry is pulverized namely.
4. according to the described synthetic method of claim 4, it is characterized in that: it is 5 with NaOH solution adjusting mixing solutions pH that three kinds of monomers mix water-soluble back.
5. according to the described synthetic method of claim 4, it is characterized in that described initiator is: ammonium persulphate and sodium bisulfite.
6. according to claim 3 or 4 or 5 described synthetic methods, it is characterized in that: initiator ammonium persulfate and sodium bisulfite mass ratio are 1:1, and the add-on of initiator is the 0.1-0.9% of 2-acrylamido-2-methyl propane sulfonic acid, acrylamide and methylene-succinic acid total mass.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106479457A (en) * | 2016-08-30 | 2017-03-08 | 长江大学 | A kind of drilling fluid heat and salinity tolerance thinner and its preparation and use |
| CN109401737A (en) * | 2018-04-14 | 2019-03-01 | 石家庄华莱鼎盛科技有限公司 | Drilling fluid solid wall agent modified resin polymer and preparation method thereof |
| CN113956854A (en) * | 2020-07-21 | 2022-01-21 | 中国石油天然气股份有限公司 | Viscosity reducer, drilling fluid and preparation method and application of viscosity reducer and drilling fluid |
| CN114634800A (en) * | 2022-03-06 | 2022-06-17 | 湖南飞来峰非金属矿物材料有限公司 | Efficient drilling grade bentonite and additive thereof |
| CN114891487A (en) * | 2022-06-10 | 2022-08-12 | 成都汇能恒源科技有限公司 | High-temperature-resistant drilling fluid diluent and preparation method thereof |
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| CN102899006A (en) * | 2012-09-20 | 2013-01-30 | 中国石油化工股份有限公司 | Phosphonic acid group-containing polymer drilling fluid viscosity reducer and preparation method thereof |
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2013
- 2013-06-26 CN CN2013102567144A patent/CN103305194A/en active Pending
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| US7325615B2 (en) * | 2005-05-02 | 2008-02-05 | Halliburton Energy Services, Inc. | Viscosified treatment fluids comprising polycarboxylic acid gelling agents and associated methods |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106479457A (en) * | 2016-08-30 | 2017-03-08 | 长江大学 | A kind of drilling fluid heat and salinity tolerance thinner and its preparation and use |
| CN106479457B (en) * | 2016-08-30 | 2019-03-15 | 长江大学 | A kind of drilling fluid heat and salinity tolerance thinner and its preparation and use |
| CN109401737A (en) * | 2018-04-14 | 2019-03-01 | 石家庄华莱鼎盛科技有限公司 | Drilling fluid solid wall agent modified resin polymer and preparation method thereof |
| CN113956854A (en) * | 2020-07-21 | 2022-01-21 | 中国石油天然气股份有限公司 | Viscosity reducer, drilling fluid and preparation method and application of viscosity reducer and drilling fluid |
| CN113956854B (en) * | 2020-07-21 | 2023-02-28 | 中国石油天然气股份有限公司 | Viscosity reducer, drilling fluid and preparation method and application of viscosity reducer and drilling fluid |
| CN114634800A (en) * | 2022-03-06 | 2022-06-17 | 湖南飞来峰非金属矿物材料有限公司 | Efficient drilling grade bentonite and additive thereof |
| CN114891487A (en) * | 2022-06-10 | 2022-08-12 | 成都汇能恒源科技有限公司 | High-temperature-resistant drilling fluid diluent and preparation method thereof |
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Application publication date: 20130918 |