CN104419390A - Compound plugging agent for oil well water control and preparation method of compound plugging agent - Google Patents
Compound plugging agent for oil well water control and preparation method of compound plugging agent Download PDFInfo
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- CN104419390A CN104419390A CN201310397664.1A CN201310397664A CN104419390A CN 104419390 A CN104419390 A CN 104419390A CN 201310397664 A CN201310397664 A CN 201310397664A CN 104419390 A CN104419390 A CN 104419390A
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Abstract
The invention relates to a compound plugging agent for oil well water control and a preparation method of the compound plugging agent. The preparation method comprises the following steps: adding water into a reactor, adding one or two of acrylic acid, N, N-methylenebisacrylamide and polyethylene glycol diacrylate while stirring until complete dissolution is achieved, slowly adding micron-sized granular montmorillonite or/and kaolin, after montmorillonite or/and kaolin is uniformly dispersed, dropwise adding ammonium ferrous sulfate and hydrogen peroxide, reacting for 1 hour at room temperature, finally adding sodium hydroxide for neutralizing to be neutral to obtain floccules and carrying out centrifugal drying on the floccules to obtain a nano(micro)-sized water-control compound temporary plugging agent. The temporary plugging agent can be used as a water-control temporary plugging agent in refracturing, plug removal and acidizing measures of old oilfields subjected to waterflooding development, the temporary plugging agent is injected from the oil well of which the moisture content is 20-40% to plug dominant waterflooding channels in medium-moisture-content and high-moisture-content oil wells and thus the purpose of measure water control in the medium-moisture-content and high-moisture-content oil wells is achieved.
Description
Technical field
The present invention relates to a kind of oil well control water composite plugging agent and preparation method thereof.
Background technology
Low permeability oil field, at input initial stage of development, has generally carried out fracturing reform, has obtained good development effectiveness.Current most main forces oil field has all entered the middle high water-cut development stage, refracturing, Breakdown acidizing technology are as the important measures of the comprehensive regulation of maturing field water-control oil-increasing, centering high water-cut well successfully carries out refracturing, Breakdown acidizing, the repetition measure resolving middle high water cut oil field is taped the latent power problem, have important practical significance, develop for this reason and a kind ofly receive (micro-) meter level composite plugging agent for oil well control water, make every effort to realize while refracturing, Breakdown acidizing stimulation, realize control water object.
A kind of high-temperature temporary blocking agent of patent CN1288036A ' and preparation method thereof ' provide reaction under a kind of high temperature and form colloid and reach shutoff high permeability formation, improve the object of section.This blocking agent is colloidal, not easily enters height and oozes passage deep, can not realize deep control water object.Patent CN1597837A ' water-solubility acidity temporary plugging agent for press cracking ', adopt gelatine, sulfonated gilsonite, guanidine glue to be prepared into the temporary plugging agent that particle diameter is 3-6mm, have 100% water-soluble, after construction, energy rapid solution, does not pollute reservoir.This blocking agent particle diameter is comparatively large, can realize pressure break and block up temporarily, but can not control the object of water after practice weekly notes to waterflooding maturing field.Patent CN1614193A ' utilizes relative permeability modifier to improve the fracturing process of recovery ratio ' in oil reservoir, improve relative permeability to oil, reduce the rate of permeation of water, moisture growth after control fracturing, extend the oil recovery phase before the water ratio that reaches capacity, the material of the acrylic amide that this invention adopts, realization improves profit rate of permeation, improves oil reservoir development benefit.
Summary of the invention
The object of this invention is to provide a kind of oil well control water composite plugging agent that can change profit rate of permeation and preparation method thereof.The injection efficiency of temporary plugging agent and shut-off capacity is improved to receive (micro-) meter level inorganic core, the acrylic amide material that can change Oil/water Phase Permeability is wrapped in inorganic core surface, reach high-water-cut oil-producing well advantage water drive passage in shutoff, the object of high-water-cut oil-producing well measure control water in realization.
(micro-) meter level control water composite plugging agent of receiving of the present invention, is made up of according to weight part following material:
One of the present invention receives the preparation side of (micro-) meter level control water Complex Temporary Blocking agent:
Proportioning is carried out by above-mentioned consumption, water is added in reactor, add vinylformic acid and N, one or both in N-methylene-bisacrylamide, polyethyleneglycol diacrylate, under agitation until dissolve completely, slowly add micron particles polynite or/and kaolin, after it is dispersed, start to drip ferrous ammonium sulphate and hydrogen peroxide, at room temperature react 1h, finally add sodium hydroxide and be neutralized to neutrality, the centrifugal oven dry of floss of gained is receives the agent of (micro-) meter level control water Complex Temporary Blocking.
This Complex Temporary Blocking agent is made up of nano-micro level inorganic core and polymer shell, and wherein inorganic core is the unexpanded polynite/kaolin of nano-micro level, and polymer shell is the polyacrylamide family macromolecule that can change Oil/water Phase Permeability.The shell of this Complex Temporary Blocking agent is using vinylformic acid as polymerization single polymerization monomer, with N, N-methylene-bisacrylamide is as linking agent, both chain extensions, to be cross-linked to form, polymerization process adopts the initiation method of oxidation-reduction initiator, using ferrous ammonium sulphate and hydrogen peroxide as redox initiator, at room temperature prepared the polymkeric substance Complex Temporary Blocking agent with inorganic core core of nano-micro level by homogeneous solution polymerization.This temporary plugging agent can be used for the refracturing of waterflooding maturing field, the control water temporary plugging agent of Breakdown acidizing measure, and this temporary plugging agent injects from moisture (20-40%) oil well, high-water-cut oil-producing well advantage water drive passage in shutoff, the object of high-water-cut oil-producing well measure control water in realization.
Compared with prior art, excellent results of the present invention:
1. the present invention adopts micron particles inorganics as inorganic core, with vinylformic acid and N, N-methylene-bisacrylamide is crosslinked as shell, with this formed there is nucleocapsid structure Large stone, large size, water-swelling microballoon form, the initial particle of microballoon can reach micron order, thus does effective shutoff to pervious course.
2. the shell lapping of (micro-) meter level control water Complex Temporary Blocking agent received of synthesis can change Oil/water Phase Permeability, realizes the object of water-control oil-increasing.
3. polynite/the kaolin of cheapness can reduce production cost, improves the Development Benefit in oil field.
Specific embodiments
Below in conjunction with embodiment, the present invention is described in detail.
Embodiment 1:
The present invention is made up of according to weight part following material:
The preparation method of meter level control water Complex Temporary Blocking agent that one is received (micro-): described preparation method carries out proportioning by above-mentioned consumption, water is added in reactor, add vinylformic acid and N,N methylene bis acrylamide, under agitation until dissolve completely, slowly add polynite, after it is dispersed, starts to drip ferrous ammonium sulphate and hydrogen peroxide, at room temperature react 1h, finally add sodium hydroxide and be neutralized to neutrality, the centrifugal oven dry of floss of gained is micron-sized plugging agent.
Embodiment 2:
The present invention is made up of according to weight part following material:
The preparation method of meter level control water Complex Temporary Blocking agent that one is received (micro-): described preparation method carries out proportioning by above-mentioned consumption, water is added in reactor, add vinylformic acid and N, N-methylene-bisacrylamide, under agitation until dissolve completely, slowly add kaolin, after it is dispersed, start to drip ferrous ammonium sulphate and hydrogen peroxide, at room temperature react 1h, finally add sodium hydroxide and be neutralized to neutrality, the centrifugal oven dry of floss of gained is receives the agent of (micro-) meter level control water Complex Temporary Blocking.
Embodiment 3:
The present invention is made up of according to weight part following material:
The preparation method of meter level control water Complex Temporary Blocking agent that one is received (micro-), its special character is: described preparation method carries out proportioning by above-mentioned consumption, water is added in reactor, add vinylformic acid, N, N-methylene-bisacrylamide and polyethyleneglycol diacrylate, under agitation until dissolve completely, slowly add polynite, after it is dispersed, start to drip ferrous ammonium sulphate and hydrogen peroxide, at room temperature react 1h, finally add sodium hydroxide and be neutralized to neutrality, the centrifugal oven dry of floss of gained is receives the agent of (micro-) meter level control water Complex Temporary Blocking.
Claims (2)
1. a preparation method for oil well control water composite plugging agent, is characterized in that:
Raw material is made up of according to weight part following material:
Preparation method:
Proportioning is carried out by above-mentioned consumption, water is added in reactor, add vinylformic acid and N, one or both in N-methylene-bisacrylamide, polyethyleneglycol diacrylate, under agitation until dissolve completely, slowly add micron particles polynite or/and kaolin, after it is dispersed, start to drip ferrous ammonium sulphate and hydrogen peroxide, at room temperature react 1h, finally add sodium hydroxide and be neutralized to neutrality, the centrifugal oven dry of floss of gained is receives the agent of (micro-) meter level control water Complex Temporary Blocking.
2. an oil well control water composite plugging agent, is characterized in that: it is prepared by method according to claim 1, and with micron particles inorganics for inorganic core, vinylformic acid and N,N methylene bis acrylamide are cross-linked the microballoon with nucleocapsid structure for shell.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310397664.1A CN104419390A (en) | 2013-09-04 | 2013-09-04 | Compound plugging agent for oil well water control and preparation method of compound plugging agent |
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| CN201310397664.1A CN104419390A (en) | 2013-09-04 | 2013-09-04 | Compound plugging agent for oil well water control and preparation method of compound plugging agent |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106811182A (en) * | 2016-12-12 | 2017-06-09 | 中国石油天然气集团公司 | A kind of anti-collapse sealing agent and its preparation method and application |
| CN107603575A (en) * | 2017-10-23 | 2018-01-19 | 北京斯迪莱铂油气技术有限公司 | One kind control water reservoir reconstruction method |
| CN108040483A (en) * | 2015-06-25 | 2018-05-15 | 全球有机能源股份有限公司 | Reservoir processing |
| CN108913118A (en) * | 2018-06-15 | 2018-11-30 | 大港油田集团有限责任公司 | One kind being used for high water-cut reservoir water-control oil-increasing acidification technique method |
| CN109054788A (en) * | 2018-08-09 | 2018-12-21 | 高阳 | A kind of pressure break diverting agent and preparation method thereof |
| CN110669484A (en) * | 2019-09-17 | 2020-01-10 | 大港油田集团有限责任公司 | Degradable temporary plugging agent for well repair and preparation method thereof |
| CN111303849A (en) * | 2020-04-02 | 2020-06-19 | 中国石油大学(华东) | Temporary plugging agent, preparation method thereof and high-temperature reservoir temporary plugging diversion fracturing method |
| CN114752368A (en) * | 2021-01-11 | 2022-07-15 | 中国石油天然气集团有限公司 | Pod-type degradable temporary plugging ball for fracturing and preparation and application thereof |
| CN115029115A (en) * | 2022-06-10 | 2022-09-09 | 西南石油大学 | Plugging agent for recovering oil well productivity |
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| CN102485830A (en) * | 2010-12-02 | 2012-06-06 | 北京化工大学 | Profile control oil-displacement agent for core-shell type inorganic/organic polymer composite microballoon |
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Patent Citations (3)
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| CN102268166A (en) * | 2010-06-03 | 2011-12-07 | 北京化工大学 | Preparation method of terpolymer for oilfield water plugging |
| CN102485830A (en) * | 2010-12-02 | 2012-06-06 | 北京化工大学 | Profile control oil-displacement agent for core-shell type inorganic/organic polymer composite microballoon |
| WO2012090158A1 (en) * | 2010-12-27 | 2012-07-05 | Eni S.P.A. | Method for recovering oil from a reservoir by means of micro (nano) - structured fluids with controlled release of barrier substances |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108040483B (en) * | 2015-06-25 | 2022-02-18 | 全球有机能源股份有限公司 | Reservoir treatment |
| CN108040483A (en) * | 2015-06-25 | 2018-05-15 | 全球有机能源股份有限公司 | Reservoir processing |
| CN106811182A (en) * | 2016-12-12 | 2017-06-09 | 中国石油天然气集团公司 | A kind of anti-collapse sealing agent and its preparation method and application |
| CN107603575A (en) * | 2017-10-23 | 2018-01-19 | 北京斯迪莱铂油气技术有限公司 | One kind control water reservoir reconstruction method |
| CN108913118A (en) * | 2018-06-15 | 2018-11-30 | 大港油田集团有限责任公司 | One kind being used for high water-cut reservoir water-control oil-increasing acidification technique method |
| CN108913118B (en) * | 2018-06-15 | 2021-07-13 | 大港油田集团有限责任公司 | Water-control oil-increasing acidification process method for high-water-content oil reservoir |
| CN109054788A (en) * | 2018-08-09 | 2018-12-21 | 高阳 | A kind of pressure break diverting agent and preparation method thereof |
| CN110669484A (en) * | 2019-09-17 | 2020-01-10 | 大港油田集团有限责任公司 | Degradable temporary plugging agent for well repair and preparation method thereof |
| CN111303849A (en) * | 2020-04-02 | 2020-06-19 | 中国石油大学(华东) | Temporary plugging agent, preparation method thereof and high-temperature reservoir temporary plugging diversion fracturing method |
| CN111303849B (en) * | 2020-04-02 | 2021-05-28 | 中国石油大学(华东) | Temporary plugging agent, preparation method thereof and high-temperature reservoir temporary plugging diversion fracturing method |
| US11945995B2 (en) | 2020-04-02 | 2024-04-02 | China University Of Petroleum | Temporary plugging agent and preparation method thereof, and method for temporary plugging and fracturing of high-temperature reservoir |
| CN114752368A (en) * | 2021-01-11 | 2022-07-15 | 中国石油天然气集团有限公司 | Pod-type degradable temporary plugging ball for fracturing and preparation and application thereof |
| CN114752368B (en) * | 2021-01-11 | 2023-10-27 | 中国石油天然气集团有限公司 | Pod type degradable temporary plugging ball for fracturing, preparation and application thereof |
| CN115029115A (en) * | 2022-06-10 | 2022-09-09 | 西南石油大学 | Plugging agent for recovering oil well productivity |
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Application publication date: 20150318 |