CN104910884B - A kind of preparation method of compound bio Weak Gels water shutoff agent - Google Patents
A kind of preparation method of compound bio Weak Gels water shutoff agent Download PDFInfo
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- CN104910884B CN104910884B CN201510166218.9A CN201510166218A CN104910884B CN 104910884 B CN104910884 B CN 104910884B CN 201510166218 A CN201510166218 A CN 201510166218A CN 104910884 B CN104910884 B CN 104910884B
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- 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
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Abstract
The invention discloses a kind of preparation method of compound bio Weak Gels water shutoff agent, this method utilizes xanthans, sodium metasilicate, aluminium citrate or trivalent organic C r3+Ion formation Weak Gels, are blocked to oil reservoir Thief zone water-yielding stratum.Water shutoff agent prepared by the inventive method is not only suitable for the oil reservoir high permeability zone closure of conventional oil well, is also applied for Profile Control in Injection Well, transfer drive operation, keeps the change water-yielding stratum, water shutoff agent enter where can just block up where, so as to save a large amount of activity durations and expense.And the Weak Gels can be degraded with sodium hypochlorite or hydrogen peroxide, if stifled wrong, can again be untied, be a kind of excellent water shutoff agent for solving readable high resistance to salinity.
Description
Technical field
The invention belongs to oil exploitation water shutoff agent technical field, and in particular to a kind of system of compound bio Weak Gels water shutoff agent
Preparation Method.
Background technology
Oil well chemo-selective water blockoff is a kind of professional technique, is usually used in producing well exploitation later stage water filling water logging
Administer and well water injectivity profile modification transfer drive manufacturing improvement to improve yield.Chemical water shutoff is carried out in recent years mainly applies poly- third
Acrylamide gel, carbopol gel, waterglass calcium chloride plural gel, TC-1 thixotropings Cement Slurry, high-water expansion agent etc. are
Row water shutoff agent, achieves preferable oil increasing effect.But some problems are have also discovered in technique application process at the scene, main performance
：
(1), gel is not tolerated to high salt high salinity, is easily failed.
(2), inorganic gel easily causes " sausage-filling ", " plant flag bar " underground work accident.
(3), complex process, bores the labor intensity such as plug, pipe cleaning greatly, operating cost is high.
(4) it is, irreversible for the stifled oil reservoir of mistake, it is impossible to which that de-plugging recovers.
(5), reagent cost is high, deficiency in economic performance, and easily effective oil reservoir is caused to accompany stifled phenomenon.
The content of the invention
The present invention solves existing water shutoff agent unfavorable by providing a kind of preparation method of compound bio Weak Gels water shutoff agent
It is irreversible in underground work, wrong stifled oil reservoir, it is impossible to the problem of de-plugging recovers.
The technical solution adopted in the present invention is, a kind of preparation method of compound bio Weak Gels water shutoff agent, this method bag
Include lower step：
A prepares A agent
The ratio for being followed successively by 25-50: 2-2.3: 11-12: 5-7 according to mass ratio weighs xanthans, chromic salts, concentration 36%
Formalin, sodium thiosulfate or sodium sulfite, then weighed material is mixed, stir at 30 DEG C with 10,000 parts of water,
A agent is made；
B. B agent is prepared
The ratio for being followed successively by 10-20: 0.8-1.2: 0.8-1.2: 100-150 according to mass ratio weighs polyacrylamide, lemon
Lemon acid aluminium, sodium thiosulfate or sodium sulfite, modulus be more than 3 and content be 30% sodium metasilicate, then by the property weighed
Matter mixes with 10,000 parts of water, stirred, and B agent is made；
C. water shutoff agent is prepared
A agent and B agent are weighed for 1: 1 ratio according to mass ratio, is then well mixed all A agent and B agent that weigh, i.e.,
Obtain finished product water shutoff agent.
As a modification of the present invention, a, the preparation of the A agent are followed successively by 30: 2.2: 11.5: 6 according to mass ratio
Ratio weighs xanthans, chromic salts, the formalin of content 36%, sodium thiosulfate or sodium sulfite, then by institute at 30 DEG C
Weigh material to mix, stir with 10,000 parts of water, A agent is made；
B, the preparation of the B agent, the ratio for being followed successively by 15: 1: 1: 128 according to mass ratio weigh polyacrylamide, citric acid
Aluminium, sodium thiosulfate or sodium sulfite, modulus are more than 3 and content is 30% sodium metasilicate, then by all substances weighed and 1
Ten thousand parts of water mix, stirred, and B agent is made；
C, by A agent obtained above and B agent, weighed according to mass ratio for 1: 1 ratio, then by all A agent weighed
It is well mixed with B agent, get product water shutoff agent.
As another improvement of the present invention, the chromic salts is chromic acetate or potassium bichromate.
Water shutoff agent prepared by the inventive method is not only suitable for the oil reservoir high permeability zone closure of conventional oil well, is also applied for water filling
Well profile control, transfer drive operation, keep the change water-yielding stratum, water shutoff agent enter where can just block up where, so as to save a large amount of operations
Time and expense.And the Weak Gels can be degraded with sodium hypochlorite or hydrogen peroxide, if stifled wrong, can again be untied, be
A kind of solve can block up the excellent water shutoff agent of high resistance to salinity.Water shutoff agent of the present invention is identical with common water shutoff agent usage.
Xanthans in the Weak Gels is usually used in food additives, therefore the environmental protection of this water shutoff agent.
Embodiment
With reference to embodiment, the present invention is described in detail.
The invention provides a kind of preparation method of compound bio Weak Gels water shutoff agent, this method is real according to following steps
Apply：
A. A agent is prepared
The ratio for being followed successively by 25-50: 2-2.3: 11-12: 5-7 according to mass ratio weighs xanthans, chromic salts, concentration 36%
Formalin, sodium thiosulfate or sodium sulfite, then weighed material is mixed, stir at 30 DEG C with 10,000 parts of water,
A agent is made；
B. B agent is prepared
The ratio for being followed successively by 10-20: 0.8-1.2: 0.8-1.2: 100-150 according to mass ratio weighs polyacrylamide, lemon
Lemon acid aluminium, sodium thiosulfate or sodium sulfite, modulus be more than 3 and content be 30% sodium metasilicate, then by the property weighed
Matter mixes with 10,000 parts of water, stirred, and B agent is made；
C. water shutoff agent is prepared
A agent and B agent are weighed for 1: 1 ratio according to mass ratio, is then well mixed all A agent and B agent that weigh, i.e.,
Obtain finished product water shutoff agent.
Embodiment 1
Xanthans 25kg, chromic acetate 2kg and the formaldehyde 11kg of concentration 36%, sodium thiosulfate 6kg are weighed, then at 30 DEG C
Weighed material is mixed with 10000kg water, stirred, A agent is made, glue bucket sealing is then placed in, is placed in shady place guarantor
Deposit, it is stand-by；
Polyacrylamide 10kg, aluminium citrate 1.2kg, sodium sulfite 0.8kg, modulus are weighed more than 3 and the silicon of content 30%
Sour sodium 100kg, then all substances weighed are mixed, stir with 10000kg water, and B agent is made, and are then placed in glue bucket close
Envelope, is placed in shady place preservation, stand-by；
A agent and B agent are weighed for 1: 1 ratio according to mass ratio, is then well mixed all A agent and B agent that weigh, i.e.,
Obtain water shutoff agent of the present invention.
Embodiment 2
Weigh xanthans 30kg, potassium bichromate 2.2kg and concentration more than 36% formaldehyde 11.5kg, sodium thiosulfate 5kg, so
Weighed material is mixed with 10000kg water at 30 DEG C afterwards, stirred, A agent is made, glue bucket sealing, juxtaposition is then placed in
Preserved in shady place, it is stand-by；
Weigh the silicon that polyacrylamide 15kg, aluminium citrate 1kg, sodium thiosulfate 1kg, modulus are more than 3 and content 30%
Sour sodium 128kg, then all substances weighed are mixed, stir with 10000kg water, and B agent is made, and are then placed in glue bucket close
Envelope, is placed in shady place preservation, stand-by；
A agent and B agent are weighed for 1: 1 ratio according to mass ratio, is then well mixed all A agent and B agent that weigh, i.e.,
Complete the preparation of water shutoff agent of the present invention.
Embodiment 3
Xanthans 50kg, potassium bichromate 2.3kg and concentration are weighed more than 36% formaldehyde 12kg, sodium sulfite 7kg, Ran Hou
Weighed material is mixed with 10000kg water at 30 DEG C, stirred, A agent is made.Glue bucket sealing is then placed in, the moon is placed in
Liang Chu is preserved, stand-by；
Polyacrylamide 20kg, aluminium citrate 0.8kg, sodium sulfite 1.2kg, modulus are weighed more than 3 and content 30%
Sodium metasilicate 150kg, then all substances weighed are mixed, stir with 10000kg water, and B agent is made, and are then placed in glue bucket
Sealing, is placed in shady place preservation, stand-by；
A agent and B agent are weighed for 1: 1 ratio according to mass ratio, is then well mixed all A agent and B agent that weigh, i.e.,
Complete the preparation of water shutoff agent of the present invention.
Claims (3)
1. a kind of preparation method of compound bio Weak Gels water shutoff agent, it is characterised in that the preparation method of the water shutoff agent include with
Lower step：
A. A agent is prepared
The ratio for being followed successively by 25-50: 2-2.3: 11-12: 5-7 according to mass ratio weighs xanthans, chromic salts, the formaldehyde of concentration 36%
Solution, sodium thiosulfate or sodium sulfite, then weighed material is mixed, stir at 30 DEG C with 10,000 parts of water, is made
A agent；
B. B agent is prepared
The ratio for being followed successively by 10-20: 0.8-1.2: 0.8-1.2: 100-150 according to mass ratio weighs polyacrylamide, citric acid
Aluminium, sodium thiosulfate or sodium sulfite, modulus are more than 3 and content is 30% sodium metasilicate, then by all substances weighed and 1
Ten thousand parts of water mix, stirred, and B agent is made；
C. water shutoff agent is prepared
A agent and B agent are weighed for 1: 1 ratio according to mass ratio, then all A agent and B agent that weigh are well mixed, produced into
Product water shutoff agent.
2. the preparation method of compound bio Weak Gels water shutoff agent according to claim 1, it is characterised in that：A, the A agent
Preparation, the ratio for being followed successively by 30: 2.2: 11.5: 6 according to mass ratio weigh xanthans, chromic salts, the formalin of concentration 36%,
Sodium thiosulfate or sodium sulfite, then weighed material is mixed, stir at 30 DEG C with 10,000 parts of water, and A agent is made；
B, the preparation of the B agent, the ratio for being followed successively by 15: 1: 1: 128 according to mass ratio weigh polyacrylamide, aluminium citrate,
Sodium thiosulfate or sodium sulfite, modulus are more than 3 and content is 30% sodium metasilicate, then by all substances weighed and 10,000
Part water mixes, stirred, and B agent is made；
C, by A agent obtained above and B agent, weighed according to mass ratio for 1: 1 ratio, then by all A agent and B agent that weigh
It is well mixed, get product water shutoff agent.
3. the preparation method of compound bio Weak Gels water shutoff agent according to claim 1 or 2, it is characterised in that：The chromium
Salt is chromic acetate or potassium bichromate.
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| 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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| CN104910884B true CN104910884B (en) | 2017-08-15 |
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| 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 |
| 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 |
| CN108130062B (en) * | 2018-01-22 | 2020-04-07 | 陕西延长石油(集团)有限责任公司研究院 | Rapid self-degradation water-soluble liquid rubber plug and preparation method thereof |
| 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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| US4074757A (en) * | 1975-07-03 | 1978-02-21 | Standard Oil Company (Indiana) | Method using lignosulfonates for high-temperature plugging |
| CN101250401A (en) * | 2008-03-28 | 2008-08-27 | 中国石油天然气股份有限公司 | Thixotropy high-strength gel diverting agent |
| CN101880522A (en) * | 2010-06-12 | 2010-11-10 | 中国石油大学(华东) | Novel inorganic-organic ternary composite plugging agent for oil extraction and preparation method |
| CN102089401A (en) * | 2008-04-10 | 2011-06-08 | 哈利伯顿能源服务公司 | Micro-crosslinked gels and associated methods |
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| CN104017135A (en) * | 2014-06-20 | 2014-09-03 | 武汉工程大学 | Method for preparing microbial polysaccharide modified copolymer gel plugging agent |
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2015
- 2015-04-08 CN CN201510166218.9A patent/CN104910884B/en not_active Expired - Fee Related
Patent Citations (6)
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| US4074757A (en) * | 1975-07-03 | 1978-02-21 | Standard Oil Company (Indiana) | Method using lignosulfonates for high-temperature plugging |
| CN101250401A (en) * | 2008-03-28 | 2008-08-27 | 中国石油天然气股份有限公司 | Thixotropy high-strength gel diverting agent |
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