CN104910884A - Preparation method of composite biological weak gel plugging agent - Google Patents
Preparation method of composite biological weak gel plugging agent Download PDFInfo
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- CN104910884A CN104910884A CN201510166218.9A CN201510166218A CN104910884A CN 104910884 A CN104910884 A CN 104910884A CN 201510166218 A CN201510166218 A CN 201510166218A CN 104910884 A CN104910884 A CN 104910884A
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/50—Compositions for plastering borehole walls, i.e. compositions for temporary consolidation of borehole walls
- C09K8/504—Compositions based on water or polar solvents
- C09K8/506—Compositions based on water or polar solvents containing organic compounds
- C09K8/508—Compositions based on water or polar solvents containing organic compounds macromolecular compounds
- C09K8/514—Compositions based on water or polar solvents containing organic compounds macromolecular compounds of natural origin, e.g. polysaccharides, cellulose
Abstract
The invention discloses a preparation method of a composite biological weak gel plugging agent. The method utilizes xanthan gum, sodium silicate, aluminum citrate, or trivalent organic Cr<3+> ions to form weak gel to block high permeability water-yielding stratum of oil reservoir. The plugging agent prepared by the method is applicable to plugging of high permeability zone in conventional oil wells, also applies to water injection wells profile and profile control and displacement; the water-yielding stratum does not need to be found, and the plugging agent can plug everywhere it goes, thus saving a lot of work time and costs. The weak gel can be degraded by sodium hypochlorite or hydrogen peroxide; if the wrong place is plugged, the weak gel can be degraded; therefore, the composite biological weak gel plugging agent is a solvable readable excellent plugging agent with high resistance to salinity.
Description
Technical field
The invention belongs to oil production plugging agent technical field, be specifically related to a kind of preparation method of compound bio Weak Gels plugging agent.
Background technology
Oil well chemo-selective water blockoff is a kind of professional technique, and the manufacturing improvement of the improvement and well water injectivity profile modification transfer drive that are usually used in producing well exploitation later stage water filling water logging is to improve output.Carry out the chemical water plugging mainly serial plugging agent such as using polypropylene acrylamide gel, carbopol gel, water glass calcium chloride plural gel, TC-1 thixotroping Cement Slurry, high-water expansion agent in recent years, achieve good oil increasing effect.But have also discovered some problems in process application process at the scene, be mainly manifested in:
(1), gel do not tolerate high salt high salinity, very easily loses efficacy.
(2), inorganic gel very easily causes " sausage-filling ", " plant flag bar " borehole operation accident.
(3), complex process, bore the labour intensity such as plug, pipe cleaning greatly, operating cost is high.
(4), to block up oil reservoir for mistake irreversible, can not de-plugging recover.
(5), reagent cost is high, deficiency in economic performance, and easily causes effective oil reservoir and accompany stifled phenomenon.
Summary of the invention
The present invention, by providing a kind of preparation method of compound bio Weak Gels plugging agent, solves existing plugging agent and is unfavorable for that borehole operation, wrong stifled oil reservoir are irreversible, can not the problem recovered of de-plugging.
The technical solution adopted in the present invention is, a kind of preparation method of compound bio Weak Gels plugging agent, and the method comprises lower step:
A prepares A agent
The ratio being followed successively by 25-50: 2-2.3: 11-12: 5-7 according to mass ratio takes xanthan gum, chromic salts, the formaldehyde solution of concentration 36%, Sulfothiorine or S-WAT, then at 30 DEG C, taken material is mixed with 10,000 parts of water, stirs, obtained A agent;
B. B agent is prepared
According to mass ratio be followed successively by 10-20: 0.8-1.2: 0.8-1.2: 100-150 ratio takes polyacrylamide, Tiorco 677, Sulfothiorine or S-WAT, modulus is greater than 3 and content is the water glass of 30%, then all substances taken are mixed with 10,000 parts of water, stir, obtained B agent;
C. plugging agent is prepared
The ratio being 1: 1 according to mass ratio takes A agent and B agent, and then all A agent taken and B agent are mixed, get product plugging agent.
As a modification of the present invention, the preparation of a, described A agent, the ratio being followed successively by 30: 2.2: 11.5: 6 according to mass ratio takes xanthan gum, chromic salts, the formaldehyde solution of content 36%, Sulfothiorine or S-WAT, then at 30 DEG C, taken material is mixed with 10,000 parts of water, stirs, obtained A agent;
The preparation of b, described B agent, according to mass ratio be followed successively by 15: 1: 1: 128 ratio takes polyacrylamide, Tiorco 677, Sulfothiorine or S-WAT, modulus is greater than 3 and content is the water glass of 30%, then all substances taken are mixed with 10,000 parts of water, stir, obtained B agent;
C, by above-mentioned obtained A agent and B agent, the ratio being 1: 1 according to mass ratio takes, and then all A agent taken and B agent are mixed, get product plugging agent.
As another improvement of the present invention, described chromic salts is chromium acetate or potassium bichromate.
Plugging agent prepared by the inventive method had both been applicable to the oil reservoir high permeability zone shutoff of conventional oil well, was also applicable to Profile Control in Injection Well, transfer drive operation, kept the change water-yielding stratum, and plugging agent enters and where just where can block up, thus saves a large amount of activity duration and expense.And this Weak Gels with clorox or hydrogen peroxide degraded, if stifled wrong, can be untied again, be a kind ofly separate the excellent plugging agent that can block up high resistance to salinity.Plugging agent of the present invention is identical with common plugging agent usage.
Xanthan gum in this Weak Gels is usually used in foodstuff additive, therefore the environmental protection of this plugging agent.
Embodiment
Below in conjunction with embodiment, the present invention is described in detail.
The invention provides a kind of preparation method of compound bio Weak Gels plugging agent, the method is implemented according to following steps:
A. A agent is prepared
The ratio being followed successively by 25-50: 2-2.3: 11-12: 5-7 according to mass ratio takes xanthan gum, chromic salts, the formaldehyde solution of concentration 36%, Sulfothiorine or S-WAT, then at 30 DEG C, taken material is mixed with 10,000 parts of water, stirs, obtained A agent;
B. B agent is prepared
According to mass ratio be followed successively by 10-20: 0.8-1.2: 0.8-1.2: 100-150 ratio takes polyacrylamide, Tiorco 677, Sulfothiorine or S-WAT, modulus is greater than 3 and content is the water glass of 30%, then all substances taken are mixed with 10,000 parts of water, stir, obtained B agent;
C. plugging agent is prepared
The ratio being 1: 1 according to mass ratio takes A agent and B agent, and then all A agent taken and B agent are mixed, get product plugging agent.
Embodiment 1
Take xanthan gum 25kg, chromium acetate 2kg and concentration 36% formaldehyde 11kg, Sulfothiorine 6kg, then at 30 DEG C, taken material is mixed with 10000kg water, stirs, make A agent, then put into the sealing of glue bucket, and In Shade preservation, stand-by;
Take polyacrylamide 10kg, Tiorco 677 1.2kg, S-WAT 0.8kg, modulus be greater than 3 and content 30% water glass 100kg, then all substances taken are mixed with 10000kg water, stir, make B agent, then put into the sealing of glue bucket, and In Shade preservation, stand-by;
The ratio being 1: 1 according to mass ratio takes A agent and B agent, then all A agent taken and B agent is mixed, obtains plugging agent of the present invention.
Embodiment 2
Take xanthan gum 30kg, potassium bichromate 2.2kg and concentration to be greater than 36% formaldehyde 11.5kg, Sulfothiorine 5kg, then at 30 DEG C, taken material to be mixed with 10000kg water, stirs, make A agent, then the sealing of glue bucket is put into, and In Shade preservation, stand-by;
Take polyacrylamide 15kg, Tiorco 677 1kg, Sulfothiorine 1kg, modulus be greater than 3 and the water glass 128kg of content 30%, then all substances taken are mixed with 10000kg water, stir, make B agent, then put into the sealing of glue bucket, and In Shade preservation, stand-by;
The ratio being 1: 1 according to mass ratio takes A agent and B agent, then all A agent taken and B agent is mixed, namely completes the preparation of plugging agent of the present invention.
Embodiment 3
Take xanthan gum 50kg, potassium bichromate 2.3kg and concentration to be greater than 36% formaldehyde 12kg, S-WAT 7kg, then at 30 DEG C, taken material to be mixed with 10000kg water, stirs, make A agent.Then the sealing of glue bucket is put into, and In Shade preservation, stand-by;
Take polyacrylamide 20kg, Tiorco 677 0.8kg, S-WAT 1.2kg, modulus be greater than 3 and the water glass 150kg of content 30%, then all substances taken are mixed with 10000kg water, stir, make B agent, then put into the sealing of glue bucket, and In Shade preservation, stand-by;
The ratio being 1: 1 according to mass ratio takes A agent and B agent, then all A agent taken and B agent is mixed, namely completes the preparation of plugging agent of the present invention.
Claims (3)
1. a preparation method for compound bio Weak Gels plugging agent, is characterized in that, the preparation method of this plugging agent comprises lower step:
A. A agent is prepared
The ratio being followed successively by 25-50: 2-2.3: 11-12: 5-7 according to mass ratio takes xanthan gum, chromic salts, the formaldehyde solution of concentration 36%, Sulfothiorine or S-WAT, then at 30 DEG C, taken material is mixed with 10,000 parts of water, stirs, obtained A agent;
B. B agent is prepared
According to mass ratio be followed successively by 10-20: 0.8-1.2: 0.8-1.2: 100-150 ratio takes polyacrylamide, Tiorco 677, Sulfothiorine or S-WAT, modulus is greater than 3 and content is the water glass of 30%, then all substances taken are mixed with 10,000 parts of water, stir, obtained B agent;
C. plugging agent is prepared
The ratio being 1: 1 according to mass ratio takes A agent and B agent, and then all A agent taken and B agent are mixed, get product plugging agent.
2. the preparation method of compound bio Weak Gels plugging agent according to claim 1, it is characterized in that: the preparation of a, described A agent, the ratio being followed successively by 30: 2.2: 11.5: 6 according to mass ratio takes xanthan gum, chromic salts, the formaldehyde solution of content 36%, Sulfothiorine or S-WAT, then at 30 DEG C, taken material is mixed with 10,000 parts of water, stirs, obtained A agent;
The preparation of b, described B agent, according to mass ratio be followed successively by 15: 1: 1: 128 ratio takes polyacrylamide, Tiorco 677, Sulfothiorine or S-WAT, modulus is greater than 3 and content is the water glass of 30%, then all substances taken are mixed with 10,000 parts of water, stir, obtained B agent;
C, by above-mentioned obtained A agent and B agent, the ratio being 1: 1 according to mass ratio takes, and then all A agent taken and B agent are mixed, get product plugging agent.
3. the preparation method of compound bio Weak Gels plugging agent according to claim 1 and 2, is characterized in that: described chromic salts is chromium acetate or potassium bichromate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201510166218.9A CN104910884B (en) | 2015-04-08 | 2015-04-08 | A kind of preparation method of compound bio Weak Gels water shutoff agent |
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| CN201510166218.9A CN104910884B (en) | 2015-04-08 | 2015-04-08 | A kind of preparation method of compound bio Weak Gels water shutoff agent |
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| CN104910884A true CN104910884A (en) | 2015-09-16 |
| CN104910884B CN104910884B (en) | 2017-08-15 |
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| CN201510166218.9A Expired - Fee Related CN104910884B (en) | 2015-04-08 | 2015-04-08 | A kind of preparation method of compound bio Weak Gels water shutoff agent |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105567200A (en) * | 2016-03-03 | 2016-05-11 | 仇颖超 | Method for preparing biological gel profile control agent |
| CN106085393A (en) * | 2016-06-06 | 2016-11-09 | 关俊华 | A kind of preparation method of positive colloid water shutoff agent |
| CN106497532A (en) * | 2016-09-05 | 2017-03-15 | 西安石油大学 | A kind of preparation method of organo-mineral complexing Gelling Water shutoff Agent |
| CN107882544A (en) * | 2016-09-29 | 2018-04-06 | 中国石油化工股份有限公司 | A kind of mixing heat release method for removing blockage for carbonate cementation molding sand rock heavy oil wells |
| CN108130062A (en) * | 2018-01-22 | 2018-06-08 | 陕西延长石油(集团)有限责任公司研究院 | A kind of water-soluble liquid rubber plug and preparation method thereof of quickly degrading certainly |
| CN109439306A (en) * | 2018-12-24 | 2019-03-08 | 陕西明德石油科技有限公司 | Extra permeability oilfield selectivity Application of weak gel profile agent |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105567200A (en) * | 2016-03-03 | 2016-05-11 | 仇颖超 | Method for preparing biological gel profile control agent |
| CN105567200B (en) * | 2016-03-03 | 2018-05-18 | 西南石油大学 | A kind of preparation method of biogel profile control agent |
| CN106085393A (en) * | 2016-06-06 | 2016-11-09 | 关俊华 | A kind of preparation method of positive colloid water shutoff agent |
| CN106497532A (en) * | 2016-09-05 | 2017-03-15 | 西安石油大学 | A kind of preparation method of organo-mineral complexing Gelling Water shutoff Agent |
| CN107882544A (en) * | 2016-09-29 | 2018-04-06 | 中国石油化工股份有限公司 | A kind of mixing heat release method for removing blockage for carbonate cementation molding sand rock heavy oil wells |
| CN107882544B (en) * | 2016-09-29 | 2019-11-29 | 中国石油化工股份有限公司 | A kind of mixing heat release method for removing blockage for carbonate cementation molding sand rock heavy oil wells |
| CN108130062A (en) * | 2018-01-22 | 2018-06-08 | 陕西延长石油(集团)有限责任公司研究院 | A kind of water-soluble liquid rubber plug and preparation method thereof of quickly degrading certainly |
| CN109439306A (en) * | 2018-12-24 | 2019-03-08 | 陕西明德石油科技有限公司 | Extra permeability oilfield selectivity Application of weak gel profile agent |
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| CN104910884B (en) | 2017-08-15 |
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Granted publication date: 20170815 Termination date: 20210408 |