CN102925128B - Compound chemical blocking removing agent of oil field polymer injection well - Google Patents
Compound chemical blocking removing agent of oil field polymer injection well Download PDFInfo
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- CN102925128B CN102925128B CN201210434610.3A CN201210434610A CN102925128B CN 102925128 B CN102925128 B CN 102925128B CN 201210434610 A CN201210434610 A CN 201210434610A CN 102925128 B CN102925128 B CN 102925128B
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Abstract
The invention relates to a compound chemical blocking removing agent of an oil field polymer injection well. The compound chemical blocking removing agent is characterized in that a high molecular extending agent with strong electronegativity is used for hydrating and extending condensed and agglomerated polymer macromolecule chains again; peroxide is used as a primary oxidation agent; polybasic carboxylic acid which can slowly and uniformly ionize hydrogen ions is used as controlled-release acid; auxiliary agents such as a corrosion inhibitor, a penetrant, a metal ion chelating agent, a dual-metal coupling agent, an iron ion stabilizer, a bacteriacide, a stratum protective agent, and the like are added at the same time; and macromolecular polymers in blocking substances, which are near the oil field polymer injection well, and are fully extended by the extending agent, are oxidized and degraded by active hydroxyl which is produced from the reaction of the primary oxidation agent and the controlled-release acid, so that blocking of the polymer injection well is removed, and the apparent water injectivity index is improved. The chemical blocking removing agent is non-toxic and environment-friendly, has a wide applicable range of temperature and water quality, and has the advantages of simplicity in construction technique, safety and convenience in use and storage, and the like; and the viscosity-reducing rate of the compound chemical blocking removing agent to polyacrylamide gel can reach above 99%.
Description
Technical field
The invention belongs to oil and water well increasing yield and injection technical field in petroleum industry, relate to a kind of oilfield injection well composite chemical unblocking agent, also can be used for the formula chemical of offshore oilfield injection well de-plugging.
Background technology
In recent years, along with the development of the continuous in short supply and petroleum industry of world energy sources, tertiary oil recovery technology has caused gradually people's attention and has obtained major progress, and polymer flooding simple with its technology, improve the features such as oil recovery factor amplitude is large and good in economic efficiency, become Present Domestic and there is one of tertiary oil recovery method of development potentiality outward most.From the sixties in 20th century so far, existing more than 200 oil field, the whole world or block have carried out polymer flooding test, polymer displacement of reservoir oil tech has become one of important yield-increasing technology in domestic and international many oil fields.The poly-technology of reservoir sweep of note of China has developed rapidly since the nineties in 20th century, within 1998, become the poly-oil recovery state of driving the biggest in the world, all corresponding polymer flooding projects of having carried out of main force oil field such as grand celebration, triumph, Xinjiang, Jilin, the Liaohe River, Henan, Jiang-Han Area, huge port, 2003 are only that Daqing oil region is poly-drives output and exceed 12,340,000 tons.But be subject to the impact of the effect such as stratum absorption, machinery trapping and stratum clay swelling and particle migration, polymkeric substance is very easily detained in porous medium, causes duct flow section to reduce, and liquid flowing resistance increases, permeability reduction.Polymkeric substance owing to dissolving not exclusively, the reason such as molecular size range and stratum pore throat radius size is incompatible and polymers soln is affected by stratum pH, temperature, salinity and shearing force to occur sex change, also easily stop up stratum.Meanwhile, many-sided reasons such as local water character, dosing water water quality and allocation process, also easily cause polymer in injection wells.Oil layer blocking has been the problem generally running in poly-displacing oil-field exploitation.
For this problem, oil field adopts the measure such as pressure break and chemical plugging removal more both at home and abroad, but for the obstruction that polymer flooding causes, the acidification such as existing MH acid system, fluoroboric acid system, bionic acid system is difficult to obtain desirable plugging removal effect, though can alleviate to a certain extent the problem of polymer in injection wells, but the problems such as it is undesirable that ubiquity unblocking and injection increasing effect, and the useful effect phase is short.The unblocking agent that adopts strong oxidizing property is that current domestic and international generally acknowledged one is for removing the effective method of polymer in injection wells.As Nan Yuming etc. has studied FeSO
47H
2o/ (NH
4)
2s
2o
8the viscosity reduction effect of redox system to polyacrylamide solution.Relative molecular mass is 1.05 × 1O
7, the aqueous solutions of polymers that the partially hydrolyzed polyacrylamide content that degree of hydrolysis is 33% is 250～2000mg/L, through adjusting pH to 5.1, adds the S of 70mg/L
2o
8 2-fe with lOmg/L
2+and react after 1h at 45 ℃, the viscosity degradation rate of polymers soln can reach more than 90%.Duan Donghong etc. have studied the viscosity reduction effect to polyacrylamide solution of dioxide peroxide, hydrogen peroxide, ammonium persulphate, potassium permanganate, clorox, ferrous sulfate and compound system thereof.A kind of oxidized form composite blockage relieving agent YHJ-1 based on dioxide peroxide that Ji Dong develops in oil field.But there is the defects such as security risk is high, construction technology is wayward compared with other block releasing techniques in oxidation de-plugging.
Particularly Chinese offshore oilfield is since 2006 implement polymer flooding technology, and rapidly, the injection well of Bohai Bay Oil has reached more than 30 mouthfuls in development, but polymer in injection wells problem also becomes and becomes increasingly conspicuous in recent years.For offshore oilfield, because platform space is limited, production unit is intensive, security control requirements in storage, transportation, offshore lifting transfer and construction technological process to medicament is higher compared with oil field, land, and general oxidation de-plugging process is difficult to meet the safety requirements of offshore oilfield particular surroundings and engineering specifications.
Summary of the invention
In order to solve the problems such as the decline of injection allocation amount, pressure rise and oil well output reduction that the polymer in injection wells that runs in the poly-displacement of reservoir oil technique of land and offshore oilfield note causes, the invention provides a kind of applicable to composite chemical unblocking agent land, that be more suitable for offshore oilfield polymer in injection wells.Can thoroughly effectively the degrade polymer gel of different concns of this unblocking agent, removes the obstruction of injection well effectively, and has easy accumulating, asepsis environment-protecting, feature safely and efficiently, meets very much the operational requirement of land and offshore oilfield.
The present invention is a kind of oilfield injection well composite chemical unblocking agent, it is characterized in that:
This composite chemical unblocking agent composition comprises de-plugging extension agent, oxidation host, sustained-release acid and de-plugging auxiliary agent;
Described de-plugging extension agent is selected from as one or more in AMONYL 380LC, coconut fatty acid diethanolamine, glycidyl methacrylate, polyether-type anion polyurethane, sodium lignosulfonate, and de-plugging extension agent content accounts for 1% ~ 25% of composite chemical unblocking agent gross weight;
Described oxidation host is selected from as any one or a few in hydrogen peroxide, sodium peroxide, Sodium peroxoborate, calcium peroxide, potassium ferrate, clorox, peroxy tert-butyl alcohol, ditertiary butyl peroxide, and oxidation host content accounts for 10% ~ 45% of composite chemical unblocking agent gross weight;
Described sustained-release acid is selected from as one or more in citric acid, gluconic acid, 2,3 dihydroxybutanedioic acid, vinylformic acid, Sulphanilic Acid, fatty alcohol-ether sulfo-succinic acid, and sustained-release acid content accounts for 30% ~ 80% of composite chemical unblocking agent gross weight;
Described de-plugging auxiliary agent is some functional additives that need to add according to engineering and stratum, comprises inhibiter, permeate agent, metal ion chelation agent, bimetal coupling agent, Fe stabilizer, sterilant, rock stratum protective material:
Wherein inhibiter is selected from as one or more in OS-15, OP-10, OP-15, TX-20, TX-40, TWEEN-60, and inhibiter content accounts for 0.1% ~ 1% of composite chemical unblocking agent gross weight;
Wherein permeate agent is selected from as one or more in Brij 56, cetearyl alcohol alcohol ether, polyethers, polyoxyethylene ether phosphate, and permeate agent content accounts for 1% ~ 4% of composite chemical unblocking agent gross weight;
Wherein metal ion chelation agent is selected from as any one or a few in Amino Trimethylene Phosphonic Acid, 1-Hydroxy Ethylidene-1,1-Diphosphonic Acid, EDTA, Tryfac 5573 trolamine, and metal ion chelation agent content accounts for 0.04% ~ 0.12% of composite chemical unblocking agent gross weight;
Wherein bimetal coupling agent is selected from as methacrylic acid group zirconium aluminate, amino phenyl sulfonyl acidic group zirconium aluminate, and content accounts for 0.05%～1.5% of composite chemical unblocking agent gross weight;
Wherein Fe stabilizer is selected from as one or more in citric acid, 1-Hydroxy Ethylidene-1,1-Diphosphonic Acid, ethylenediamine tetramethylene phosphonic acid, nitrilotriacetic acid, and Fe stabilizer content accounts for 1% ~ 4.5% of composite chemical unblocking agent gross weight;
Wherein sterilant is selected from as one or more in two octadecyl chain quaternary ammonium salts, ethyl (1-hexadecyl) dimethyl brometo de amonio, palmityl trimethyl ammonium chloride, and sterilant content accounts for 0.5%～1.5% of composite chemical unblocking agent gross weight;
Wherein rock stratum protective material is selected from as one or more in azo two isobutyl imidazoline salt hydrochlorates, brocide salt, 2-chloromethyl imidazoline salt hydrochlorate, 1-N-hydroxyethyl-2-alkyl imidazoline quaternary ammonium salt, and rock stratum protective material content accounts for 1% ~ 3% of composite chemical unblocking agent gross weight;
When the each component compounded combination of this composite chemical unblocking agent ratio is less than 100%, its surplus is water.
According to composite chemical unblocking agent of the present invention, it is characterized in that:
De-plugging extension agent is selected from as one or more in AMONYL 380LC, coconut fatty acid diethanolamine, polyether-type anion polyurethane, sodium lignosulfonate;
Oxidation host is selected from as one or more in Sodium peroxoborate, calcium peroxide, potassium ferrate, peroxy tert-butyl alcohol;
Sustained-release acid is selected from as one or more in gluconic acid, 2,3 dihydroxybutanedioic acid, Sulphanilic Acid, fatty alcohol-ether sulfo-succinic acid;
Inhibiter is selected from as one or more in OS-15, OP-10, TX-20, TWEEN-60;
Permeate agent is selected from as one or more in Brij 56, cetearyl alcohol alcohol ether, polyoxyethylene ether phosphate;
Metal ion chelation agent is selected from as any one or a few in Amino Trimethylene Phosphonic Acid, 1-Hydroxy Ethylidene-1,1-Diphosphonic Acid, EDTA;
Bimetal coupling agent is selected from as methacrylic acid group zirconium aluminate;
Fe stabilizer is selected from as one or more in citric acid, 1-Hydroxy Ethylidene-1,1-Diphosphonic Acid, nitrilotriacetic acid;
Sterilant is selected from as one or more in two octadecyl chain quaternary ammonium salts, palmityl trimethyl ammonium chloride;
Rock stratum protective material is selected from as one or more in 2-chloromethyl imidazoline salt hydrochlorate, 1-N-hydroxyethyl-2-alkyl imidazoline quaternary ammonium salt.
According to composite chemical unblocking agent of the present invention, it is characterized in that:
The each component concentration of composite chemical unblocking agent accounts for its gross weight and is respectively: AMONYL 380LC, coconut fatty acid diethanolamine and sodium lignosulfonate compound [three's mass ratio 1:1:1] 3% ~ 15%, calcium peroxide and peroxy tert-butyl alcohol compound [the two mass ratio 3:1] 18% ~ 36%, 2, 3-dyhydrobutanedioic acid and fatty alcohol-ether sulfo-succinic acid compound [the two mass ratio 2:1] 42% ~ 65%, OS-15 and OP-10 compound [the two mass ratio 1:1] 0.2% ~ 0.8%, hexadecanol Soxylat A 25-7 1% ~ 1.5%, 1-Hydroxy Ethylidene-1,1-Diphosphonic Acid 0.05% ~ 0.10%, methacrylic acid group zirconium aluminate 0.05% ~ 0.5%, citric acid and nitrilotriacetic acid compound [the two mass ratio 1:1] 2% ~ 5%, palmityl trimethyl ammonium chloride 0.6% ~ 0.9%, 2-chloromethyl imidazoline salt hydrochlorate and 1-N-hydroxyethyl-2-alkyl imidazoline quaternary ammonium salt compound [the two mass ratio 1:1] 1.1% ~ 1.8%.
The invention is characterized in, distinctive extension agent component in this composite blockage relieving system, can play the extension expansion to condensation or crosslinked agglomerating obstruction polymer molecule, stop up dirty sample simultaneously and also can stretch the swelling fracture occurring to a certain degree because of the hydration of polymer macromolecule chain, thereby for next step oxidative degradation provides more reactive behavior point, greatly strengthen the oxidation plugging removal effect of de-plugging host.
Composite blockage relieving system in the present invention is take superoxide as oxidation host, with a kind of energy slowly, at the uniform velocity ionize out hydrionic polycarboxylic acid as sustained-release acid, add inhibiter simultaneously, permeate agent, metal ion chelation agent, Fe stabilizer, sterilant, the auxiliary agents such as rock stratum protective material, rely on oxidation host to react the high molecular polymer of the activity hydroxy oxidative degradation generating in the tamper of the wide-spread injection well of extension agent immediate vicinity of wellbore with sustained-release acid, utilize permeate agent to the removing of greasy dirt in tamper simultaneously and crack effect, play the booster action to degradation polymer, thereby efficient solution is except polymer in injection wells, renwing stratum rate of permeation, improve the apparent water injectivity index of injection well.Select especially bimetal zirconium aluminate coupling agent, can, for the stifled dirty system of the thickness such as Organic-inorganic hybrid and water-based grease mud, there is obvious modification dispersion and reduce viscosity effect.This composite blockage relieving system all has stronger adaptability to reservoir temperature, water quality, type of polymer etc., at 54 ℃, can reach more than 99% the viscosity break ratio of polyacrylamide gel, organic corrosion rate in dirty sample is stopped up in scene to be reached more than 85%, the corrosion rate of carbonate reaches more than 98%, polymer plugging recovery of core permeability 101%, shows good plugging removal effect.
Composite chemical unblocking agent system in the present invention can adopt two-fluid process squeezing technique in the time of construction, be oxidized host and sustained-release acid is prepared respectively, only below well head, biliquid contact just slowly generates de-plugging effective constituent, makes polymer backbone fracture play de-plugging effect by a cracking and the β-cleavage reaction of the polymerizing acrylamide triggered thing of sustained release living radical.Thereby so both can keep to greatest extent the activity of activity hydroxy and concentration to reach better plugging removal effect, also greatly improved the security of oxidation de-plugging process simultaneously, medicament does not have oxidation activity before not contacting, stability is strong, be applicable to land and sea transport and standing storage, meeting special operation environment and the safety requirements of land and offshore oilfield completely, is one chemical plugging removal system safely and efficiently.
Activity hydroxy has very strong corrodibility, and the high-efficient corrosion inhibitor that the composite blockage relieving system in the present invention is added has good corrosion inhibition, under the activity hydroxy effect of ground environment and strong oxidizing property, makes unblocking agent to A3,20
#, J55, N80 carbon steel still can reach≤5g/m of erosion rate
2h, meets the relevant criterion of corrosion prevention in SY/T 5405-1996, when operation, can effectively prevent the corrosion of blockages relieving fluid to pipeline and equipment, guarantees construction safety.
Embodiment
Embodiment 1:
In beaker, getting concentration is 20000ppm, and viscosity is greater than the anion-polyacrylamide gel 50g of 10000cP, and prepares composite chemical unblocking agent 1000g, and it consists of:
1% AMONYL 380LC;
1% coconut fatty acid diethanolamine;
1% sodium lignosulfonate;
13.5% calcium peroxide;
4.5% peroxy tert-butyl alcohol;
43.2%2,3-dyhydrobutanedioic acid;
21.6% fatty alcohol-ether sulfo-succinic acid;
0.1%OS-15；
0.1%OP-10；
1% Brij 56;
0.05% 1-Hydroxy Ethylidene-1,1-Diphosphonic Acid;
1.5% methacrylic acid group zirconium aluminate;
1% citric acid;
1% nitrilotriacetic acid;
0.6% palmityl trimethyl ammonium chloride;
0.55%2-chloromethyl imidazoline salt hydrochlorate;
0.55%1-N-hydroxyethyl-2-alkyl imidazoline quaternary ammonium salt;
Surplus is water;
Composite chemical unblocking agent is dissolved to 2000ml with tap water.Under 54 ℃ of conditions of simulated formation temperature, polymer gel, after composite chemical unblocking agent effect 24h, breaks glue completely, and gel viscosity reduces to 1.13, and degradation rate reaches 99.9%.
Embodiment 2:
In beaker, getting concentration is 20000ppm, and viscosity is greater than the anion-polyacrylamide gel 50g of 10000cP, and prepares composite chemical unblocking agent 1000g, and it consists of:
2% AMONYL 380LC;
2% coconut fatty acid diethanolamine;
2% sodium lignosulfonate;
27% calcium peroxide;
9% peroxy tert-butyl alcohol;
30%2,3-dyhydrobutanedioic acid;
15% fatty alcohol-ether sulfo-succinic acid;
0.4%OS-15；
0.4%OP-10；
1.5% Brij 56;
0.10% 1-Hydroxy Ethylidene-1,1-Diphosphonic Acid;
0.05% amino phenyl sulfonyl acidic group zirconium aluminate;
1.5% citric acid;
1.5% nitrilotriacetic acid;
0.9% palmityl trimethyl ammonium chloride;
0.9%2-chloromethyl imidazoline salt hydrochlorate;
0.9%1-N-hydroxyethyl-2-alkyl imidazoline quaternary ammonium salt;
Surplus is water;
Composite chemical unblocking agent is dissolved to 2000ml with tap water.Under 54 ℃ of conditions of simulated formation temperature, polymer gel, after composite chemical unblocking agent effect 24h, breaks glue completely, and gel viscosity reduces to 1.14, and degradation rate reaches 99.9%.
Embodiment 3:
In beaker, getting concentration is 20000ppm, and viscosity is greater than the anion-polyacrylamide gel 50g of 10000cP, and prepares composite chemical unblocking agent 1000g, and it consists of:
1% AMONYL 380LC;
1% coconut fatty acid diethanolamine;
1% sodium lignosulfonate;
15% calcium peroxide;
5% peroxy tert-butyl alcohol;
43.2%2,3-dyhydrobutanedioic acid;
21.6% fatty alcohol-ether sulfo-succinic acid;
0.2%OS-15；
0.2%OP-10；
1.2% Brij 56;
0.07% 1-Hydroxy Ethylidene-1,1-Diphosphonic Acid;
1.2% methacrylic acid group zirconium aluminate;
1.5% citric acid;
1.5% nitrilotriacetic acid
0.7% palmityl trimethyl ammonium chloride;
0.8%2-chloromethyl imidazoline salt hydrochlorate;
0.8%1-N-hydroxyethyl-2-alkyl imidazoline quaternary ammonium salt;
Surplus is water;
Composite chemical unblocking agent is dissolved to 2000ml with tap water.Under 54 ℃ of conditions of simulated formation temperature, polymer gel, after composite chemical unblocking agent effect 24h, breaks glue completely, and gel viscosity reduces to 1.11, and degradation rate reaches 99.9%.
Embodiment 4:
In beaker, getting concentration is 20000ppm, and viscosity is greater than the anion-polyacrylamide gel 50g of 10000cP, and prepares composite chemical unblocking agent 1000g, and it consists of:
2% AMONYL 380LC;
2% coconut fatty acid diethanolamine;
2% sodium lignosulfonate;
21% calcium peroxide;
7% peroxy tert-butyl alcohol;
36%2,3-dyhydrobutanedioic acid;
18% fatty alcohol-ether sulfo-succinic acid;
0.3%OS-15；
0.3%OP-10；
1.4% Brij 56;
0.07% 1-Hydroxy Ethylidene-1,1-Diphosphonic Acid;
0.12% amino phenyl sulfonyl acidic group zirconium aluminate;
2% citric acid;
2% nitrilotriacetic acid;
0.8% palmityl trimethyl ammonium chloride;
0.8%2-chloromethyl imidazoline salt hydrochlorate;
0.8%1-N-hydroxyethyl-2-alkyl imidazoline quaternary ammonium salt;
Surplus is water.
Composite chemical unblocking agent is dissolved to 2000ml with tap water.Under 54 ℃ of conditions of simulated formation temperature, polymer gel, after composite chemical unblocking agent effect 8h, breaks glue completely, and gel viscosity reduces to 1.15, and degradation rate reaches 99.9%.
Embodiment 5:
In beaker, getting concentration is 20000ppm, and viscosity is greater than the anion-polyacrylamide gel 50g of 10000cP, and prepares composite chemical unblocking agent 100g, and it consists of:
5% AMONYL 380LC;
5% coconut fatty acid diethanolamine;
5% sodium lignosulfonate;
15% calcium peroxide;
5% peroxy tert-butyl alcohol;
30%2,3-dyhydrobutanedioic acid;
15% fatty alcohol-ether sulfo-succinic acid;
0.2%OS-15；
0.2%OP-10；
1.4% Brij 56;
0.07% 1-Hydroxy Ethylidene-1,1-Diphosphonic Acid;
1.0% methacrylic acid group zirconium aluminate;
1.5% citric acid;
1.5% nitrilotriacetic acid;
0.6% palmityl trimethyl ammonium chloride;
0.7%2-chloromethyl imidazoline salt hydrochlorate;
0.7%1-N-hydroxyethyl-2-alkyl imidazoline quaternary ammonium salt;
Surplus is water;
Composite chemical unblocking agent is dissolved to 2000ml by the SZ36-1 Oil Field dosing water that is 10000mg/L by salinity.Under 54 ℃ of conditions of simulated formation temperature, polymer gel, after composite chemical unblocking agent effect 24h, breaks glue completely, and gel viscosity reduces to 1.14, and degradation rate reaches 99.9%.
Embodiment 6:
In beaker, getting concentration is 20000ppm, and viscosity is greater than the anion-polyacrylamide gel 50g of 10000cP, and prepares composite chemical unblocking agent 100g, and it consists of:
4% AMONYL 380LC;
4% coconut fatty acid diethanolamine;
4% sodium lignosulfonate;
24% calcium peroxide;
8% peroxy tert-butyl alcohol;
32%2,3-dyhydrobutanedioic acid;
16% fatty alcohol-ether sulfo-succinic acid;
0.1%OS-15；
0.1%OP-10；
1.4% Brij 56;
0.07% 1-Hydroxy Ethylidene-1,1-Diphosphonic Acid;
0.10% amino phenyl sulfonyl acidic group zirconium aluminate;
1.5% citric acid;
1.5% nitrilotriacetic acid;
0.8% palmityl trimethyl ammonium chloride;
0.7%2-chloromethyl imidazoline salt hydrochlorate;
0.7%1-N-hydroxyethyl-2-alkyl imidazoline quaternary ammonium salt;
Surplus is water;
Composite chemical unblocking agent is dissolved to 2000ml by the LD10-1 Oil Field dosing water that is 6000mg/L by salinity.Under 54 ℃ of conditions of simulated formation temperature, polymer gel, after composite chemical unblocking agent effect 24h, breaks glue completely, and gel viscosity reduces to 1.17, and degradation rate reaches 99.9%.
Embodiment 7:
In beaker, getting concentration is 20000ppm, and viscosity is greater than the hydrophobic association type polyacrylamide gel 50g of 10000cP, and prepares composite chemical unblocking agent 1000g, and it consists of:
4% AMONYL 380LC;
4% coconut fatty acid diethanolamine;
4% sodium lignosulfonate;
24% calcium peroxide;
8% peroxy tert-butyl alcohol;
30%2,3-dyhydrobutanedioic acid;
15% fatty alcohol-ether sulfo-succinic acid;
0.2%OS-15；
0.2%OP-10；
1.4% Brij 56;
0.07% 1-Hydroxy Ethylidene-1,1-Diphosphonic Acid;
0.5% methacrylic acid group zirconium aluminate;
1.5% citric acid;
1.5% nitrilotriacetic acid;
0.8% palmityl trimethyl ammonium chloride;
0.7%2-chloromethyl imidazoline salt hydrochlorate;
0.7%1-N-hydroxyethyl-2-alkyl imidazoline quaternary ammonium salt;
Surplus is water;
Composite chemical unblocking agent is dissolved to 2000ml by the SZ36-1 Oil Field dosing water that is 10000mg/L by salinity.Under 54 ℃ of conditions of simulated formation temperature, polymer gel, after composite chemical unblocking agent effect 24h, breaks glue completely, and gel viscosity reduces to 1.14, and degradation rate reaches 99.9%.
Embodiment 8
In beaker, dirty sample 15.5g is stopped up in enchashment field, wherein organic content 50.5%, carbonate content 12.2%.And prepare composite chemical unblocking agent 1000g, it consists of:
5% AMONYL 380LC;
5% coconut fatty acid diethanolamine;
5% sodium lignosulfonate;
24% calcium peroxide;
8% peroxy tert-butyl alcohol;
28%2,3-dyhydrobutanedioic acid;
14% fatty alcohol-ether sulfo-succinic acid;
0.2%OS-15；
0.2%OP-10；
1.4% Brij 56;
1.2% amino phenyl sulfonyl acidic group zirconium aluminate;
0.07% 1-Hydroxy Ethylidene-1,1-Diphosphonic Acid;
1.5% citric acid;
1.5% nitrilotriacetic acid;
0.8% palmityl trimethyl ammonium chloride;
0.7%2-chloromethyl imidazoline salt hydrochlorate;
0.7%1-N-hydroxyethyl-2-alkyl imidazoline quaternary ammonium salt;
Surplus is water;
Composite chemical unblocking agent is dissolved to 2000ml by the SZ36-1 Oil Field dosing water that is 10000mg/L by salinity.Under 54 ℃ of conditions of simulated formation temperature, the dirty sample of on-the-spot obstruction, after composite chemical unblocking agent effect 24h, is analyzed its organism and carbonate content, organism corrosion rate 85.5%, carbonate corrosion rate 98.1%, the total corrosion rate 87.68% of dirty sample.
Claims (3)
1. an oilfield injection well composite chemical unblocking agent, is characterized in that:
This composite chemical unblocking agent composition comprises de-plugging extension agent, oxidation host, sustained-release acid and de-plugging auxiliary agent;
Described de-plugging extension agent is selected from as one or more in AMONYL 380LC, coconut fatty acid diethanolamine, glycidyl methacrylate, polyether-type anion polyurethane, sodium lignosulfonate, and de-plugging extension agent content accounts for 1%～25% of composite chemical unblocking agent gross weight;
Described oxidation host is selected from as any one or a few in hydrogen peroxide, sodium peroxide, Sodium peroxoborate, calcium peroxide, potassium ferrate, clorox, peroxy tert-butyl alcohol, ditertiary butyl peroxide, and oxidation host content accounts for 10%～45% of composite chemical unblocking agent gross weight;
Described sustained-release acid is selected from as one or more in citric acid, gluconic acid, 2,3 dihydroxybutanedioic acid, vinylformic acid, Sulphanilic Acid, fatty alcohol-ether sulfo-succinic acid, and sustained-release acid content accounts for 30%～80% of composite chemical unblocking agent gross weight;
Described de-plugging auxiliary agent is some functional additives that need to add according to engineering and stratum, comprises inhibiter, permeate agent, metal ion chelation agent, bimetal coupling agent, Fe stabilizer, sterilant, rock stratum protective material:
Wherein inhibiter is selected from as one or more in OS-15, OP-10, OP-15, TX-20, TX-40, TWEEN-60, and inhibiter content accounts for 0.1%～1% of composite chemical unblocking agent gross weight;
Wherein permeate agent is selected from as one or more in Brij 56, cetearyl alcohol alcohol ether, polyethers, polyoxyethylene ether phosphate, and permeate agent content accounts for 1%～4% of composite chemical unblocking agent gross weight;
Wherein metal ion chelation agent is selected from as any one or a few in Amino Trimethylene Phosphonic Acid, 1-Hydroxy Ethylidene-1,1-Diphosphonic Acid, EDTA, Tryfac 5573 trolamine, and metal ion chelation agent content accounts for 0.04%～0.12% of composite chemical unblocking agent gross weight;
Wherein bimetal coupling agent is selected from as methacrylic acid group zirconium aluminate, amino phenyl sulfonyl acidic group zirconium aluminate, and content accounts for 0.05%～1.5% of composite chemical unblocking agent gross weight;
Wherein Fe stabilizer is selected from as one or more in citric acid, 1-Hydroxy Ethylidene-1,1-Diphosphonic Acid, ethylenediamine tetramethylene phosphonic acid, nitrilotriacetic acid, and Fe stabilizer content accounts for 1%～4.5% of composite chemical unblocking agent gross weight;
Wherein sterilant is selected from as one or more in two octadecyl chain quaternary ammonium salts, ethyl (1-hexadecyl) dimethyl brometo de amonio, palmityl trimethyl ammonium chloride, and sterilant content accounts for 0.5%～1.5% of composite chemical unblocking agent gross weight;
Wherein rock stratum protective material is selected from as one or more in azo two isobutyl imidazoline salt hydrochlorates, brocide salt, 2-chloromethyl imidazoline salt hydrochlorate, 1-N-hydroxyethyl-2-alkyl imidazoline quaternary ammonium salt, and rock stratum protective material content accounts for 1%～3% of composite chemical unblocking agent gross weight;
When the each component compounded combination of this composite chemical unblocking agent ratio is less than 100%, its surplus is water.
2. composite chemical unblocking agent according to claim 1, is characterized in that:
De-plugging extension agent is selected from as one or more in AMONYL 380LC, coconut fatty acid diethanolamine, polyether-type anion polyurethane, sodium lignosulfonate;
Oxidation host is selected from as one or more in Sodium peroxoborate, calcium peroxide, potassium ferrate, peroxy tert-butyl alcohol;
Sustained-release acid is selected from as one or more in gluconic acid, 2,3 dihydroxybutanedioic acid, Sulphanilic Acid, fatty alcohol-ether sulfo-succinic acid;
Inhibiter is selected from as one or more in OS-15, OP-10, TX-20, TWEEN-60;
Permeate agent is selected from as one or more in Brij 56, cetearyl alcohol alcohol ether, polyoxyethylene ether phosphate;
Metal ion chelation agent is selected from as any one or a few in Amino Trimethylene Phosphonic Acid, 1-Hydroxy Ethylidene-1,1-Diphosphonic Acid, EDTA;
Bimetal coupling agent is selected from as methacrylic acid group zirconium aluminate;
Fe stabilizer is selected from as one or more in citric acid, 1-Hydroxy Ethylidene-1,1-Diphosphonic Acid, nitrilotriacetic acid;
Sterilant is selected from as one or more in two octadecyl chain quaternary ammonium salts, palmityl trimethyl ammonium chloride;
Rock stratum protective material is selected from as one or more in 2-chloromethyl imidazoline salt hydrochlorate, 1-N-hydroxyethyl-2-alkyl imidazoline quaternary ammonium salt.
3. composite chemical unblocking agent according to claim 1, is characterized in that:
The each component concentration of composite chemical unblocking agent accounts for its gross weight and is respectively: the AMONYL 380LC take constituent mass ratio as 1:1:1, coconut fatty acid diethanolamine and sodium lignosulfonate compound 3%～15%, calcium peroxide and peroxy tert-butyl alcohol compound 18%～36% take constituent mass ratio as 3:1, take constituent mass ratio as 2 of 2:1, 3-dyhydrobutanedioic acid and fatty alcohol-ether sulfo-succinic acid compound 42%～65%, OS-15 and OP-10 compound 0.2%～0.8% take constituent mass ratio as 1:1, hexadecanol Soxylat A 25-7 1%～1.5%, 1-Hydroxy Ethylidene-1,1-Diphosphonic Acid 0.05%～0.10%, methacrylic acid group zirconium aluminate 0.05%～0.5%, citric acid and nitrilotriacetic acid compound 2%～4% take constituent mass ratio as 1:1, palmityl trimethyl ammonium chloride 0.6%～0.9%, 2-chloromethyl imidazoline salt hydrochlorate and 1-N-hydroxyethyl-2-alkyl imidazoline quaternary ammonium salt compound 1.1%～1.8% take constituent mass ratio as 1:1.
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Address after: 100010 Beijing, Chaoyangmen, North Street, No. 25, No. Patentee after: CHINA NATIONAL OFFSHORE OIL Corp. Patentee after: CNOOC TIANJIN CHEMICAL RESEARCH & DESIGN INSTITUTE Co.,Ltd. Patentee after: CNOOC ENERGY TECHNOLOGY & SERVICES Ltd. Address before: 100010 Beijing, Chaoyangmen, North Street, No. 25, No. Patentee before: CHINA NATIONAL OFFSHORE OIL Corp. Patentee before: CNOOC TIANJIN CHEMICAL RESEARCH & DESIGN INSTITUTE Patentee before: CNOOC ENERGY TECHNOLOGY & SERVICES Ltd. |
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Effective date of registration: 20161009 Address after: 300013 No. three, No. 85, Tianjin Road, Hongqiao District, China Patentee after: CNOOC TIANJIN CHEMICAL RESEARCH & DESIGN INSTITUTE Co.,Ltd. Patentee after: CNOOC ENERGY TECHNOLOGY & SERVICES Ltd. Address before: 100010 Beijing, Chaoyangmen, North Street, No. 25, No. Patentee before: CHINA NATIONAL OFFSHORE OIL Corp. Patentee before: CNOOC TIANJIN CHEMICAL RESEARCH & DESIGN INSTITUTE Co.,Ltd. Patentee before: CNOOC ENERGY TECHNOLOGY & SERVICES Ltd. |