CN103184035A - Polymer oil layer protective agent for drilling fluid and preparation method - Google Patents
Polymer oil layer protective agent for drilling fluid and preparation method Download PDFInfo
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- CN103184035A CN103184035A CN2011104499886A CN201110449988A CN103184035A CN 103184035 A CN103184035 A CN 103184035A CN 2011104499886 A CN2011104499886 A CN 2011104499886A CN 201110449988 A CN201110449988 A CN 201110449988A CN 103184035 A CN103184035 A CN 103184035A
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Abstract
The invention provides a polymer oil layer protective agent for a drilling fluid and a preparation method. The method is carried out according to the following steps of (1) adding 85-95 parts by volume of styrene, 5-65 parts by volume of butyl acrylate and 5-40 parts by volume of 2-acrylamido-2-methyl propanesulfonic acid to water, mixing uniformly, and then adding 5 parts by volume of an emulsifier to obtain a mixed liquid; (2) passing nitrogen into the mixed liquid obtained by the step (1) for 25-35 min, heating to a temperature of 70 DEG C, adding 0.01-0.2 part by weight of an initiator, and then reacting for 5-7 h by controlling the temperature at 70-80 DEG C to obtain a reaction liquid; (3) cooling the reaction liquid obtained by the step (2) to a room temperature, then adjusting a pH value of the liquid to 9-10 with a sodium hydroxide solution, putting the obtained solution in methanol with stirring, and precipitating to obtain a white precipitate; and (4) drying the white precipitate obtained by the step (3) at a temperature of 95-105 DEG C, and smashing the dried precipitate to obtain a product.
Description
Technical field
The present invention relates to a kind of oil field drilling fluids preparation method of polymer oil layer protective agent.
Background technology
In the oil-gas mining process, each link of exploratory development all can cause formation damage, and any slight pollution damage all can cause production capacity to reduce significantly.Therefore, the hydrocarbon contamination problem is familiar with by people gradually, and the reservoir protection technology of arising at the historic moment also develops rapidly, and various single types and compound oil layer protection material have been brought into play active effect in the drilling well use.But still there are some defectives in present employed protective material, and as 1. the cationic emulsified bitumen class is big to the property of drilling fluid influence, deformability is big, elasticity and poor rigidity, and sealing characteristics is relatively poor, and bearing capacity is low; 2. the plugging effect of polymerization alcohols is poor, and portioned product bubbles; 3. the sealing characteristics that does not have infiltration or ultra-low penetration class is good, but the tackify effect is remarkable, and inhibition is poor; 4. the nonelastic and deformability of calcium carbonate superfine powder class, to the bad adaptability on stratum, shutoff narrow range, unrestraint.
Summary of the invention
Purpose of the present invention is intended to overcome the deficiencies in the prior art, and one of purpose provides a kind of cheap, has good temperature tolerance, filtration reduction is good, and the inhibition ability is strong, and product is stablized bubble-tight drilling fluid polymer oil layer protective agent; Two of purpose provides the preparation method that this drilling fluid is used polymer oil layer protective agent.
One of purpose of the present invention can realize by following technical measures:
This drilling fluid contains following parts by volume proportion raw material with polymer oil layer protective agent:
Vinylbenzene 85-95 butyl acrylate 5-65
2-acrylamido-2-methyl propane sulfonic acid 5-40 initiator 0.01-0.2
Emulsifying agent 5 water 80-120.
One of purpose of the present invention also can realize by following technical measures:
Described initiator is Potassium Persulphate, ammonium persulphate, benzoyl peroxide or hydrogen peroxide; Described emulsifying agent is any class in allyl ether series sulfonate, acrylamide alkyl sulfonic acid salt or the allylic hydrophilic polymer.
Two of purpose of the present invention can realize by following technical measures:
This method is carried out as follows:
(1) vinylbenzene, butyl acrylate, 2-acrylamido-2-methyl propane sulfonic acid are added to the water, mixing adds emulsifying agent then, gets mixed solution, and this mixed solution mass concentration is 6-35%;
(2) feed nitrogen 25-35min earlier in the mixed solution of step (1), heat to 70 ℃ again, add initiator, controlling temperature then is 70-80 ℃ of reaction 5-7h down, gets reaction solution;
(3) with the reaction solution cooling room temperature of step (2), transfer pH=9-10 with sodium hydroxide solution then, place methyl alcohol to stir precipitation again, get white depositions;
(4) white depositions in the step (3) is dried down in 95-105 ℃, pulverize, get product.
Two of purpose of the present invention also can realize by following technical measures:
The mass concentration of described sodium hydroxide solution is 20-30%.
The present invention utilizes amphiphilic polymer both to contain the cation group of absorption and aquation dual function, contain a large amount of aquation groups again, can form fine and close hydration layer around the clay particle, stop and delay water molecules and contact with surface of clay, play the effect that prevents the clay particle hydration swelling; The ionization in water of cation group and anionic group is not added the influence of salt, also might stop the hydrolysis of amide group, has the advantage that leak-off falls in temperature resistant antisalt.
Gordian technique of the present invention is to have prepared a kind of excellent property amphiphilic polymer oil layer protective agent.Principal feature of the present invention is: cheap, normally to use under the higher temperatures high-pressure situations, and the preparation condition gentleness is controlled.
Technique scheme of the present invention has the following advantages compared to existing technology: the selected monomer styrene of (1) the present invention can be introduced phenyl ring at main polymer chain, has improved the temperature tolerance of product.(2) because sulfonic acid group has been introduced in the introducing of 2-acrylamido-2-methyl propane sulfonic acid in polymer molecular chain, further improved heatproof and the salt tolerance of polymer oil layer protective agent.(3) not only make it have good aqueous solubility, stability is little, non-foaming to the drilling fluid rheology influence preferably, can form temporarily stifled film at the borehole wall, strengthens shut-off capacity, reduces filter loss, reduces filtrate to the effects such as infringement of hydrocarbon zone.(4) preparation condition gentleness of the present invention is controlled, the transformation efficiency height, and used monomer is cheap and easy to get.Therefore the industrialization production feasibility height has better industrial application prospects and higher marketable value.
Embodiment:
Embodiment 1:
Preparation method of the present invention carries out as follows:
(1) raw material is prepared: calculate with the add-on in per 80 ml waters: vinylbenzene 95ml, butyl acrylate 5ml, 2-acrylamido-2-methyl propane sulfonic acid 40ml, ammonium persulphate 0.01 gram;
(2) preparation mother liquor: according to the proportioning raw materials in the step (1) vinylbenzene, butyl acrylate, 2-acrylamido-2-methyl propane sulfonic acid are added to the water, mixing forms elementary mother liquor;
(3) mother liquor emulsification: any class (as the allyl ether series sodium sulfonate) 5 that the mother liquor that step (2) is obtained adds in the allyl ether series sulfonate restrains, and gets mixed solution A, and the mass concentration of A solution is 6%;
(4) polyreaction: feed nitrogen 25min earlier in the mixed solution of step (3), heat to 70 ℃ again, add ammonium persulphate according to the proportioning raw materials in the step (1), controlling temperature then is 70 ℃ of reaction 5h down, obtains solution B;
(5) precipitation extraction: the solution B cooling room temperature that step (4) reaction back is formed is 20% sodium hydroxide solution with mass percent concentration is adjusted to 10 with the pH of described solution B, then products therefrom is stirred precipitation in methyl alcohol, gets white depositions;
(6) oven dry: the white depositions that forms in the step (5) is dried and pulverized at 95 ℃, namely get polymer oil layer protective agent (micro-yellow powder).
By the polymer oil layer protective agent that above embodiment synthesizes, polymerisation conversion is 79%.The polymer oil layer protective agent dosage is the 1%(quality) time, API filtration is 19ml, 120 ℃ of high temperature and high pre ssure filtrations are 37ml.
Embodiment 2:
Preparation method of the present invention carries out as follows:
(1) raw material is prepared: calculate with the add-on in per 120 ml waters: vinylbenzene 85ml, butyl acrylate 65ml, 2-acrylamido-2-methyl propane sulfonic acid 5ml, ammonium persulphate 0.2 gram;
(2) preparation mother liquor: according to the proportioning raw materials in the step (1) vinylbenzene, butyl acrylate, 2-acrylamido-2-methyl propane sulfonic acid are added to the water, mixing forms elementary mother liquor;
(3) mother liquor emulsification: any class (as the allyl ether series sodium sulfonate) 5 that the mother liquor that step (2) is obtained adds in the allyl ether series sulfonate restrains, and gets mixed solution A, and the mass concentration of A solution is 20%;
(4) polyreaction: feed nitrogen 35min earlier in the mixed solution of step (3), heat to 70 ℃ again, add ammonium persulphate according to the proportioning raw materials in the step (1), controlling temperature then is 80 ℃ of reaction 7h down, obtains solution B;
(5) precipitation extraction: the solution B cooling room temperature that step (4) reaction back is formed is 30% sodium hydroxide solution with mass percent concentration is adjusted to 9 with the pH of described solution B, then products therefrom is stirred precipitation in methyl alcohol, gets white depositions;
(6) oven dry: the white depositions that forms in the step (5) is dried and pulverized at 105 ℃, namely get polymer oil layer protective agent (micro-yellow powder).
By the polymer oil layer protective agent that above embodiment synthesizes, polymerisation conversion is 87%.The polymer oil layer protective agent dosage is the 1%(quality) time, API filtration is 12ml, 120 ℃ of high temperature and high pre ssure filtrations are 25ml.
Embodiment 3:
Preparation method of the present invention carries out as follows:
(1) raw material is prepared: calculate with the add-on in per 100 ml waters: vinylbenzene 90ml, butyl acrylate 50ml, 2-acrylamido-2-methyl propane sulfonic acid 25ml, ammonium persulphate 0.1 gram;
(2) preparation mother liquor: according to the proportioning raw materials in the step (1) vinylbenzene, butyl acrylate, 2-acrylamido-2-methyl propane sulfonic acid are added to the water, mixing forms elementary mother liquor;
(3) mother liquor emulsification: any class (as the allyl ether series sodium sulfonate) 5 that the mother liquor that step (2) is obtained adds in the allyl ether series sulfonate restrains, and gets mixed solution A, and the mass concentration of A solution is 35%;
(4) polyreaction: feed nitrogen 30min earlier in the mixed solution of step (3), heat to 70 ℃ again, add ammonium persulphate according to the proportioning raw materials in the step (1), controlling temperature then is 75 ℃ of reaction 6h down, obtains solution B;
(5) precipitation extraction: the solution B cooling room temperature that step (4) reaction back is formed is 25% sodium hydroxide solution with mass percent concentration is adjusted to 9.5 with the pH of described solution B, then products therefrom is stirred precipitation in methyl alcohol, gets white depositions;
(6) oven dry: the white depositions that forms in the step (5) is dried and pulverized at 100 ℃, namely get polymer oil layer protective agent (micro-yellow powder).
By the polymer oil layer protective agent that above embodiment synthesizes, polymerisation conversion is 93%.The polymer oil layer protective agent dosage is the 1%(quality) time, API filtration is 9ml, 120 ℃ of high temperature and high pre ssure filtrations are 18ml.
Embodiment 4:
Different is to replace ammonium persulphate with ammonium persulphate, and other are respectively with embodiment 1-3.
Embodiment 5:
Different is to replace ammonium persulphate with benzoyl peroxide, and other are respectively with embodiment 1-3.
Embodiment 6:
Different is to replace ammonium persulphate with hydrogen peroxide, and other are respectively with embodiment 1-3.
Embodiment 7:
Different is that other are respectively with embodiment 1-6 with any class (as the allyl ether series sodium sulfonate) in any class replacement allyl ether series sulfonate in the acrylamide alkyl sulfonic acid salt.
Embodiment 8:
Different is that other are respectively with embodiment 1-6 with any class (as the allyl ether series sodium sulfonate) in any class replacement allyl ether series sulfonate in the allylic hydrophilic polymer.
The above only is the present invention's preferable case study on implementation wherein, is not to limit practical range of the present invention: namely all equalizations of doing according to the present patent application claim change and modify, and the scope that is all claim of the present invention contains.
Claims (5)
1. drilling fluid polymer oil layer protective agent is characterized in that it contains following parts by volume proportion raw material:
Vinylbenzene 85-95 butyl acrylate 5-65
2-acrylamido-2-methyl propane sulfonic acid 5-40 initiator 0.01-0.2
Emulsifying agent 5 water 80-120.
2. a kind of drilling fluid polymer oil layer protective agent according to claim 1 is characterized in that described initiator is Potassium Persulphate, ammonium persulphate, benzoyl peroxide or hydrogen peroxide.
3. a kind of drilling fluid polymer oil layer protective agent according to claim 1 is characterized in that described emulsifying agent is any class in allyl ether series sulfonate, acrylamide alkyl sulfonic acid salt or the allylic hydrophilic polymer.
4. one kind with the feedstock production drilling fluid of claim 1 method with polymer oil layer protective agent, it is characterized in that this method carries out as follows:
(1) vinylbenzene, butyl acrylate, 2-acrylamido-2-methyl propane sulfonic acid are added to the water, mixing adds emulsifying agent then, gets mixed solution;
(2) feed nitrogen 25-35min earlier in the mixed solution of step (1), heat to 70 ℃ again, add initiator, controlling temperature then is 70-80 ℃ of reaction 5-7h down, gets reaction solution;
(3) with the reaction solution cooling room temperature of step (2), transfer pH=9-10 with sodium hydroxide solution then, place methyl alcohol to stir precipitation again, get white depositions;
(4) white depositions in the step (3) is dried down in 95-105 ℃, pulverize, get product.
5. method according to claim 1, the mass concentration that it is characterized in that described sodium hydroxide solution is 20-30%.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103936914A (en) * | 2014-04-10 | 2014-07-23 | 中国石油集团渤海钻探工程有限公司 | High temperature resistant non-fluorescence anti-sloughing nano-filtrate reducer and preparation method thereof |
| CN104403058A (en) * | 2014-10-31 | 2015-03-11 | 中国石油化工集团公司 | Latex plugging agent for drilling fluid and preparation method thereof |
| CN104418965A (en) * | 2013-08-27 | 2015-03-18 | 中国石油化工股份有限公司 | Preparation method of self-healing agent for oil well cement, well cementation self-healing cement slurry and application |
| CN104610485A (en) * | 2015-02-06 | 2015-05-13 | 中国石油大学(北京) | Amphipathic reservoir protection agent as well as preparation method and application, and drilling fluid and application thereof |
| CN107057662A (en) * | 2017-01-22 | 2017-08-18 | 中国石油集团川庆钻探工程有限公司工程技术研究院 | A kind of water-base drilling fluid sealing agent and its preparation method and application |
| CN107353882A (en) * | 2017-06-30 | 2017-11-17 | 常州市协旺纺织品有限公司 | A kind of oil layer protective agent |
| CN109535317A (en) * | 2018-10-15 | 2019-03-29 | 中国石油集团工程技术研究院有限公司 | A kind of anticalcium resistant to high temperatures protection oil and gas reservoir water-base drilling fluid fluid loss additive and drilling fluid and its application |
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| CN101842551A (en) * | 2007-10-31 | 2010-09-22 | 罗迪亚公司 | Addition of nonionic surfactants to water soluble block copolymers to increase the stability of the copolymer in aqueous solutions containing salt and/or surfactants |
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Patent Citations (1)
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| CN101842551A (en) * | 2007-10-31 | 2010-09-22 | 罗迪亚公司 | Addition of nonionic surfactants to water soluble block copolymers to increase the stability of the copolymer in aqueous solutions containing salt and/or surfactants |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104418965A (en) * | 2013-08-27 | 2015-03-18 | 中国石油化工股份有限公司 | Preparation method of self-healing agent for oil well cement, well cementation self-healing cement slurry and application |
| CN104418965B (en) * | 2013-08-27 | 2018-02-23 | 中国石油化工股份有限公司 | Preparation method, well cementation self-healing cement mortar and the application of oil-well cement self-healing mixture |
| CN103936914A (en) * | 2014-04-10 | 2014-07-23 | 中国石油集团渤海钻探工程有限公司 | High temperature resistant non-fluorescence anti-sloughing nano-filtrate reducer and preparation method thereof |
| CN104403058A (en) * | 2014-10-31 | 2015-03-11 | 中国石油化工集团公司 | Latex plugging agent for drilling fluid and preparation method thereof |
| CN104610485A (en) * | 2015-02-06 | 2015-05-13 | 中国石油大学(北京) | Amphipathic reservoir protection agent as well as preparation method and application, and drilling fluid and application thereof |
| CN104610485B (en) * | 2015-02-06 | 2016-02-03 | 中国石油大学(北京) | Amphipathic container horizon protective agent and its preparation method and application and drilling fluid and application thereof |
| US9399692B1 (en) | 2015-02-06 | 2016-07-26 | China University Of Petroleum (Beijing) | Amphiphilic reservoir protecting agent and preparation method thereof and drilling fluid |
| CN107057662A (en) * | 2017-01-22 | 2017-08-18 | 中国石油集团川庆钻探工程有限公司工程技术研究院 | A kind of water-base drilling fluid sealing agent and its preparation method and application |
| CN107353882A (en) * | 2017-06-30 | 2017-11-17 | 常州市协旺纺织品有限公司 | A kind of oil layer protective agent |
| CN109535317A (en) * | 2018-10-15 | 2019-03-29 | 中国石油集团工程技术研究院有限公司 | A kind of anticalcium resistant to high temperatures protection oil and gas reservoir water-base drilling fluid fluid loss additive and drilling fluid and its application |
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Effective date of registration: 20230818 Address after: 100728 No. 22 North Main Street, Chaoyang District, Beijing, Chaoyangmen Patentee after: CHINA PETROLEUM & CHEMICAL Corp. Patentee after: Drilling fluid technology service center of Sinopec Shengli Petroleum Engineering Co.,Ltd. Address before: 100728 No. 22 North Main Street, Chaoyang District, Beijing, Chaoyangmen Patentee before: CHINA PETROLEUM & CHEMICAL Corp. Patentee before: Drilling Engineering and Technology Company of SINOPEC Shengli Petroleum Administration |
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