CN102875728B - Zwitterionic polymer anti-collapse agent for foam drilling - Google Patents
Zwitterionic polymer anti-collapse agent for foam drilling Download PDFInfo
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- CN102875728B CN102875728B CN201210425067.0A CN201210425067A CN102875728B CN 102875728 B CN102875728 B CN 102875728B CN 201210425067 A CN201210425067 A CN 201210425067A CN 102875728 B CN102875728 B CN 102875728B
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Abstract
A zwitterionic polymer anti-collapse agent for foam drilling is formed by co-polymerizing an organic acid monomer A, an organic amide monomer B, a cation monomer C, an initiator and a pH value modifier according to the synthetic step at a certain mass ratio. The preparation technology is simple, the operation is simple and convenient, and the obtained product has the secondary shale recovery rate larger than 90 percent in 0.5% aqueous solution for 48 h and saturated adsorption larger than 100 mg/g, and has the characteristics of strong inhibition and adsorption. Serving as the anti-collapse agent of foam drilling fluid, the zwitterionic polymer anti-collapse agent can effectively restrain hydrous expansion of shale under the premise of guaranteeing the stability of foam fluid, improves the stability of the foam drilling sidewall, prolongs the safety operation time of foam and gives full play to the technical advantages of gas drilling.
Description
Technical field:
The present invention relates to a kind of foam drilling amphoteric ion polymer anti-sloughing agent, belong to macromolecule material preparation area, particularly relate to a kind of foam drilling anti-sloughing agent.
Background technology:
Foam drilling technology is a kind of new using uniform and stable aerated fluid as drilling well circulatory mediator, be to solve gas drilling to bore the technical way of meeting a large amount of local waters and big size hole and take rock and take water problems, be applicable to low pressure oil gas reservoir, weak cementing and leakiness lost territory layer.
In foam drilling process, infiltrate stratum because of the water in aerated fluid and stratum water outlet, can cause shale hydration to expand, formation cementation strength decreased, the difficult problem such as the wellbore stability time is short.Foam drilling belongs to under-balanced drilling, and the anti-collapse technical measures of mechanics are restricted, and need improve from chemical angle the inhibition caving-preventing ability of foam drilling fluid, suppresses the hydration swelling of mud shale.The on-the-spot foam anti-sloughing agent kind using is single at present, is generally the anti-sloughing agent of selecting water-base drilling fluid used, comprises the polymkeric substance anti-sloughing agent of KCl, macromole coating agent, cation monomer etc.Patent CN101812288A discloses a kind of inhibiting and anti-sloughing agent for drilling fluid, and material component is acrylamide AM, vinylformic acid AA, cationic monomer diallyldimethylammonChloride Chloride, and its content of cationic monomer is only 12.5% of monomer total mass; Vinylformic acid AA content accounts for 6.25%～31.25% of monomer total mass.Patent CN101747878A discloses a kind of atomization foam drilling fluid, and its anti-sloughing agent is drilling fluid fluosilicic anti-sloughing agent.
Existing anti-sloughing agent needs the contradiction between balanced drilling liquid inhibition and colloidal stability, thereby it suppresses scarce capacity.
Summary of the invention:
The object of the present invention is to provide a kind of foam drilling amphoteric ion polymer anti-sloughing agent, ensureing, under the prerequisite of aerated fluid stability, to solve the problem of foam drilling fluid inhibition deficiency in foam drilling.
The present invention is realized by following technical proposals:
The present invention by organic acid monomer A, organic amide class monomers B, cationic monomer C according to (1～3): (77～89): the mass percent of (10～20), under the effect of initiator and pH value conditioning agent, copolymerization forms.
Above-mentioned organic acid monomer A is one or both in vinylformic acid, 2-acrylamide-2-methylpro panesulfonic acid.
Above-mentioned organic amide class monomers B is one or both in acrylamide, Methacrylamide, N,N-DMAA.
Above-mentioned cationic monomer C is one or both in dimethyl diallyl ammonium chloride, allyl group trimethyl ammonium chloride, MethacryloyloxyethylTrimethyl Trimethyl Ammonium Chloride.
Described initiator is redox initiator, and oxygenant is the one of Potassium Persulphate or ammonium persulphate, and reductive agent is sodium bisulfite.
Described polymkeric substance anti-sloughing agent is prepared by following steps: by organic acid monomer A, organic amide class monomers B, cationic monomer C according to (1～3): (77～89): the quality proportioning of (10～20) is dissolved in suitable quantity of water, sodium hydroxide solution by 40% regulates pH value 9.0～11.0, under constantly stirring, slowly add appropriate initiator, kick off temperature is at 20～60 DEG C, reaction times 0.5～2h, product, through shear granulation, is dried, is pulverized at 60 DEG C, to obtain final product.
The invention has the beneficial effects as follows that preparation technology is simple, easy and simple to handle, bis-shale recovery ratio was of products obtained therefrom 0.5% aqueous solution 48h are greater than 90.0%, saturated extent of adsorption is greater than 100.0mg/g, there is the characteristic of strong inhibition, strong absorption, as the anti-sloughing agent of foam drilling fluid, ensureing under the prerequisite of aerated fluid stability, can effectively suppress the hydration swelling of mud shale, improve foam drilling borehole wall stability, extend the foam security activity duration, give full play to air drilling advantage.
Embodiment:
In embodiment 1:100g water, add 3g vinylformic acid, sodium hydroxide solution with 40% after fully dissolving regulates pH value to 9, add 85g N,N-DMAA, 12g diallyldimethylammonium chloride, add respectively 0.5g ammonium persulphate and 0.5g sodium bisulfite, 30 DEG C of kick off temperatures, reaction times 0.5h, product is through shear granulation, at 60 DEG C, dry, pulverize, obtain target product.
In embodiment 2:100g water, add the basic 2-methyl propane sulfonic acid of 2g2-acrylamide, 1g2-acrylamido 2-methyl propane sulfonic acid, regulates pH value to 10 with 40% sodium hydroxide solution after fully dissolving, and adds 85g N, N-DMAA, 12g diallyldimethylammonium chloride, adds respectively 0.5g ammonium persulphate and 0.5g sodium bisulfite, 20 DEG C of kick off temperatures, reaction times 1h, product, through shear granulation, is dried, is pulverized at 60 DEG C, obtains target product.
In embodiment 3:100g water, add 2g vinylformic acid, sodium hydroxide solution with 40% after fully dissolving regulates pH value to 11, adds 72g acrylamide and, 10N, N-DMAA, 16g diallyldimethylammonium chloride, adds respectively 0.5g ammonium persulphate and 0.5g sodium bisulfite, 60 DEG C of kick off temperatures, reaction times 2h, product, through shear granulation, is dried, is pulverized at 60 DEG C, obtains target product.
Other specific embodiments provide component according to table 1 and prepare.
Table 1 specific embodiment component list (unit: g)
The performance index of table 2 embodiment
As shown in Table 2, bis-shale recovery ratio was of the present invention 0.5% aqueous solution 48h are greater than 90%, and saturated extent of adsorption is higher than 100mg/g, and dissolved solution is good, suppress caving-preventing ability strong.
Claims (6)
1. a foam drilling amphoteric ion polymer anti-sloughing agent, it is characterized in that: by organic acid monomer A, organic amide class monomers B, cationic monomer C according to (1～3): (77～89): the mass percent of (10～20), under the effect of initiator and pH value conditioning agent, copolymerization forms.
2. a kind of foam drilling amphoteric ion polymer anti-sloughing agent according to claim 1, is characterized in that: described organic acid monomer A is one or both in vinylformic acid, 2-acrylamide-2-methylpro panesulfonic acid.
3. a kind of foam drilling amphoteric ion polymer anti-sloughing agent according to claim 1, is characterized in that: described organic amide class monomers B is one or both in acrylamide, Methacrylamide, N,N-DMAA.
4. a kind of foam drilling amphoteric ion polymer anti-sloughing agent according to claim 1, is characterized in that: described cationic monomer C is one or both in dimethyl diallyl ammonium chloride, allyl group trimethyl ammonium chloride, MethacryloyloxyethylTrimethyl Trimethyl Ammonium Chloride.
5. a kind of foam drilling amphoteric ion polymer anti-sloughing agent according to claim 1, is characterized in that: described initiator is redox initiator, and oxygenant is the one of Potassium Persulphate or ammonium persulphate, and reductive agent is sodium bisulfite.
6. a kind of foam drilling amphoteric ion polymer anti-sloughing agent according to claim 1, it is characterized in that: described polymkeric substance anti-sloughing agent is prepared by following steps: by organic acid monomer A, organic amide class monomers B, cationic monomer C is according to (1～3): (77～89): the quality proportioning of (10～20) is dissolved in suitable quantity of water, sodium hydroxide solution by 40% regulates pH value 9.0～11.0, under constantly stirring, slowly add appropriate initiator, kick off temperature is at 20～60 DEG C, reaction times 0.5～2h, product is through shear granulation, at 60 DEG C, dry, pulverize, obtain.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210425067.0A CN102875728B (en) | 2012-10-30 | 2012-10-30 | Zwitterionic polymer anti-collapse agent for foam drilling |
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| CN201210425067.0A CN102875728B (en) | 2012-10-30 | 2012-10-30 | Zwitterionic polymer anti-collapse agent for foam drilling |
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| CN102875728B true CN102875728B (en) | 2014-12-03 |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104140490B (en) * | 2013-10-28 | 2017-05-17 | 中国石油化工集团公司 | Polymer inhibitor for clay phase-free drilling fluid and preparation method thereof |
| CN103641953A (en) * | 2013-12-04 | 2014-03-19 | 克拉玛依市金鑫科技有限公司 | Amphiprotic polyelectrolyte polymer and preparation method thereof |
| CN104926992B (en) * | 2014-03-19 | 2017-09-29 | 中国石油化工股份有限公司 | A kind of synthetic method of drilling fluid amphoteric ion copolymer |
| CN104650287A (en) * | 2015-02-13 | 2015-05-27 | 荆州市天合科技化工有限公司 | Novel powder cationic polymer for preventing clay from hydration swelling |
| CN107841299B (en) * | 2016-09-19 | 2020-01-07 | 中石化石油工程技术服务有限公司 | Anti-collapse foam liquid and preparation method thereof |
| CN111004612B (en) * | 2018-10-08 | 2022-07-08 | 中石化石油工程技术服务有限公司 | Micro-bubble drilling fluid |
| CN111978934A (en) * | 2019-05-21 | 2020-11-24 | 中石化南京化工研究院有限公司 | Strong coating inhibitor for drilling fluid and preparation method thereof |
| CN110358510B (en) * | 2019-07-16 | 2021-08-17 | 荆州市众天化工有限公司 | Strong-sensitive anti-swelling inhibitor for continental facies shale and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101812288B (en) * | 2010-04-16 | 2012-12-26 | 新乡市振华钻井液材料有限公司 | Inhibiting and anti-sloughing agent for drilling fluid |
| CN101942057A (en) * | 2010-08-20 | 2011-01-12 | 中国海洋石油总公司 | Baking self-crosslinking fluorine-containing acrylate resin for metal substrate |
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