CN103396776A - Self-generating foam blocking removal agent for oil-water well and blocking removal process - Google Patents
Self-generating foam blocking removal agent for oil-water well and blocking removal process Download PDFInfo
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- CN103396776A CN103396776A CN2013102947158A CN201310294715A CN103396776A CN 103396776 A CN103396776 A CN 103396776A CN 2013102947158 A CN2013102947158 A CN 2013102947158A CN 201310294715 A CN201310294715 A CN 201310294715A CN 103396776 A CN103396776 A CN 103396776A
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Abstract
The invention relates to a self-generating foam blocking removal agent for an oil-water well and a blocking removal process. The foam blocking removal agent is composed of an agent formula A and an agent formula B, wherein the agent formula A is composed of inorganic acid, organic acid, quinoline quaternary ammonium salt, alkynol, iodine salt, imidazoline acetate, polyethenoxy ether sulfonic acid, dodecyl trimethyl quaternary ammonium salt and clear water; and the agent formula B is composed of carbonate, peroxide, fluorosurfactant, salt-free imidazoline, ferric ion stabilizer, foam stabilizer and clear water. The blocking removal process comprises the following steps: injecting a certain amount of prepad fluid through a cementing truck; then, injecting the agent A through one cementing truck and the agent B through another cementing truck; after the injection of the agent A and the agent B is finished, injecting displacement fluid; then injecting clear water; and shutting in the well, and then performing flowback or directly transferring into production. According to the invention, based on the synergic effect between the surfactants, the injected blocking removal agent has blocking removal effect and simultaneously has profile control and displacement effect for an injection well; and the injected blocking removal agent has blocking removal effect and simultaneously has foam huff and puff effect on an oil well.
Description
Technical field
The present invention relates to de-plugging process, be particularly related to a kind of oil and water well self-generating foam unblocking agent and de-plugging process, a kind of efficient blockage removing agent and the de-plugging process that for removing oilfield oil reservoir and water injection well water filling layer, because of drilling process, fracturing process, operation process, production process fluid settling, foulant, bacterial reproduction, result in blockage.
Background technology
Oilfield oil reservoir and water injection well water filling layer, can be because settlings and stopping up in fluid in the process of pressure break, in the process of the process of operation, production in the process of drilling well, fluid fouling and stopping up, bacterial reproduction and stopping up.Obstruction causes the flow conductivity of oil well oil reservoir and water injection well water filling layer to descend, and causes the field produces production declining, and economic benefit descends, and has a strong impact on normally carrying out of field produces.Therefore, need to inject unblocking agent to remove the obstruction of settling, foulant, bacterium to oil well oil reservoir and water injection well water filling layer, recover or improve the pore throat radius of rock, the flow conductivity of oil reservoir or water filling layer is strengthened, output and water injection rate are restored or improve, thereby the benefit of whole field produces is improved.
Unblocking agent commonly used has hydrochloric acid, mud acid, micella acid, emulsified acid, foamed acid etc. at present, when wherein hydrochloric acid, mud acid unblocking agent contact with oil reservoir or water filling layer stratum, speed of response is fast, can not go deep into earth formation deep and remove the obstruction of earth formation deep, and because the unblocking agent additive is single, not good enough to the releasing effect of tamper; Although wherein micella acid, emulsified acid have reduced the time that acid contacts with stratum, reduced sour speed of response, volume is limited owing to injecting, spread area is also limited, plug removal radius does not reach requirement, although the foamed acid volume has increased, acid has also reduced with the speed of response on stratum, but what foamed acid was all taked is on-the-spot to oil well or water injection well injection high pressure nitrogen, the supply of source of the gas has difficulties, and injection pressure also is restricted, the operating procedure complexity, plant factor is low, and cost is high.
Summary of the invention
In order to overcome the defect of above-mentioned prior art, the object of the present invention is to provide a kind of oil and water well self-generating foam unblocking agent and de-plugging process, can overcome the deficiency of unblocking agent at present commonly used, be mainly manifested in injection pressure unrestricted, unblocking agent injects volume and increases considerably, solution removing solid capacity to tamper strengthens, can remove the obstruction of multiple tamper, plug removal radius obviously increases, plugging removal effect obviously strengthens, the foaming agent that injects has certain transfer drive effect and oil displacement efficiency, and cost is low, and construction technology is simple, convenient.
For achieving the above object, technical scheme of the present invention is:
A kind of oil and water well self-generating foam unblocking agent, by A agent prescription and B agent prescription, press (1～2): the volume ratio of (1～2) forms,
Wherein the mass percent of A agent prescription consists of: mineral acid 0～25%, organic acid 0～10%, quinoline quaternary ammonium salt 0.1～0.5%, alkynol 0.01～0.5%, salt compounded of iodine 0.001～0.05%, tetrahydroglyoxaline acetate 0.01～0.3%, polyoxyethylene ether sulfonic acid 0.01～1.5%, alkyl methyl quaternary ammonium salt 0.01～0.5%, surplus are that clear water forms;
Wherein the mass percent of B agent prescription consists of: carbonate 0.5～30%, superoxide 0.5～5%, fluorine surfactant 0～15mg/L, salt-free tetrahydroglyoxaline 0.01～0.5%, Fe stabilizer 0.01～0.1%, suds-stabilizing agent 0.05～1%, surplus are that clear water forms.
Described mineral acid comprises in mass ratio: HCL:HF: nitric acid: thionamic acid=1～25:0.5～20:0～20:0～20
Described organic acid comprises in mass ratio: formic acid: acetic acid: citric acid: succinic acid=0～10:0～10:0～10:0～10.
The mixture of one or more in the described quinoline quaternary ammonium salt quaternary ammonium salt that to be the synthetic quaternary ammonium salt of quinoline and Benzyl Chloride or quinoline synthesize with the synthetic quaternary ammonium salt of benzyl dichloride or quinoline and dichlorobutane, the ratio of mixture is arbitrarily.
Described alkynol is one or more the mixture in propiolic alcohol or butynediol or methylbutynol or eneyne alcohol, and the ratio of mixture is arbitrarily.
Described salt compounded of iodine is one or more the mixture in potassiumiodide, sodium iodide, tributyl-methyl phosphonium ammonium iodide, Tetramethylammonium iodide, and the ratio of mixture is arbitrarily.
Described tetrahydroglyoxaline acetate is one or more the mixture in oleic imidazolinone acetate, lauric acid imidazoline acetate, naphthenic acid imidazoline acetate, and the ratio of mixture is arbitrarily.
Described polyoxyethylene ether sulfonic acid is one or more the mixture in fatty alcohol-polyoxyethylene ether sulfonic acid, alkylphenol polyoxyethylene sulfonic acid, aliphatic acid polyethenoxy ether, aliphatic amine polyoxyethylene ether, and the ratio of mixture is arbitrarily.
Described alkyl methyl quaternary ammonium salt is one or more the mixture in Dodecyl trimethyl ammonium chloride, tetradecyl trimethyl ammonium chloride, octadecyl trimethyl ammonium chloride, dodecyl benzyl dimethyl ammonium chloride, and the ratio of mixture is arbitrarily.
Described carbonate is one or more the mixture in sodium carbonate, sodium bicarbonate, salt of wormwood, saleratus, bicarbonate of ammonia, and the ratio of mixture is arbitrarily.
Described superoxide is hydrogen peroxide, Sodium Persulfate, the mixture of one or more in ammonium persulphate, SPC-D, and the ratio of mixture is arbitrarily.
Described fluorine surfactant is the N-ethyl, the mixture of one or more in N-hydroxyethyl perfluorooctyl sulfonyl ammonium phosphate, perfluoro octyl sulfonic acid ammonium, perfluoro octyl sulfonic acid, perfluorooctyl sulfonyl quaternary amine oxide compound, and the ratio of mixture is arbitrarily.
Described salt-free tetrahydroglyoxaline is one or more the mixture in salt-free oleic imidazolinone, salt-free lauric acid imidazoline, salt-free stearic acid tetrahydroglyoxaline, salt-free Viscotrol C tetrahydroglyoxaline, and the ratio of mixture is arbitrarily.
Described Fe stabilizer is one or more the mixture in sodium chloroacetate, edetate, diethylenetriamine carboxylate salt, triethylene tetramine carboxylate salt, and the ratio of mixture is arbitrarily.
Described suds-stabilizing agent is the also mixture of one or more in virgin rubber, two octadecyl trimethyl quaternary ammonium salt of hydroxypropyl guar gum, Natvosol, hydroxypropylcellulose, biological polymer, and the ratio of mixture is arbitrarily.
A kind of de-plugging process based on above-mentioned oil and water well self-generating foam unblocking agent, step is: 2 cementing trucks are connected with a threeway mixing tank respectively, and the threeway mixing tank is connected with the tubing valve of oil well or water injection well again, first with cementing truck, injects spearhead, injection rate Q
Before=wellbore volume+5m
3The quinoline Benzyl Chloride that consists of 0.1%～1% OP-9,50～100mg/L of spearhead, the naphthenic acid imidazoline acetate of 100～50mg/L, the propiolic alcohol of 10～30mg/L, then with a cementing truck, inject the A agent, a cementing truck injects the B agent, the injection of A agent and B agent must be carried out simultaneously, and the two injection discharge capacity proportional range is (1～2): after (1～2), A agent and B agent are injected and finished, inject displacing liquid, injection rate Q
Top=wellbore volume+2m
3, the glycerol that consists of 1%-5% of displacing liquid, the OP-10 of 200～500mg/L, fluorine surfactant 2～10mg/L, and then inject clear water, injection rate Q
Clearly=80% wellbore volume, closing well be more than 4 hours, the row of returning or directly change production over to.
Principle of the present invention is: on-the-spot by A agent prescription and B agent prescription by 2 pumps respectively according to (1～2): the volume ratio of (1～2) pumps into, by the threeway mixing tank, mix, in oil pipe, react, produce a large amount of bubbles, these bubbles, under the effect of tensio-active agent and suds-stabilizing agent, have formed stable microbubble and have injected stratum.Due in the situation that except considering, can produce the stable microbubble foam during selection function treatment agent, oil displacement efficiency, the corrosion mitigating effect puted forth effort treatment agent have carried out estimating screening, the erosion rate of having selected to form the stable microbubble foam and can also effectively having reduced unblocking agent, have the treatment agent system of good oil displacement efficiency.The injection liquid volume is increased more than 5-20 times than A, B agent volume, enlarged the swept volume of unblocking agent; The microbubble that produces on the other hand enters stratum, due to the capillary effect of microbubble, suppressed the speed of response of mineral acid, organic acid and rock surface in the unblocking agent, the unblocking agent that makes to enter earth formation deep still has the ability of reacting with the rock surface tamper, reaches the purpose of removing clog in deep reservoir; For water injection well, the stability of microbubble can play the effect of transfer drive simultaneously, and the collaborative of mixed surfactant wherein makes it also have certain displacement of reservoir oil effect; For the oil well microbubble, can play the effect of handling up.This unblocking agent is to the 6g/m of corrosion of metal speed less than standard-required
2H.
The invention provides a kind of and formation rock speed of response slow, can go deep into earth formation deep, remove unblocking agent and the de-plugging process of oilfield oil reservoir and the various tamper of water injection well water filling layer; Simultaneously in the situation of the Composition and function by considering various tensio-active agents, utilize the synergy between tensio-active agent, when making the unblocking agent that injects not only to water injection well, have the de-plugging effect, have transfer drive and displacement of reservoir oil effect, when for oil well, having the de-plugging effect, have the effect that foam is handled up.
The accompanying drawing explanation
De-plugging process schema when Fig. 1 is oil and water well self-generating foam unblocking agent site operation of the present invention.
Embodiment
Below by specific embodiment, further illustrate the present invention.
Example 1
The unblocking agent of the present embodiment, consist of A agent prescription and the B agent prescription volume ratio by 1:1,
Wherein the mass percent of A agent prescription consists of: 10%HCL, 2%HF, 1% acetic acid, 1% citric acid, 0.3% quinoline Benzyl Chloride quaternary ammonium salt, 0.01% potassiumiodide, 0.2% propiolic alcohol, 0.1% naphthenic acid imidazoline acetate, 0.5% fatty alcohol-polyoxyethylene ether sulfonic acid, 0.05% Dodecyl trimethyl ammonium chloride, all the other are clear water.
Wherein the mass percent of B agent prescription consists of: the perfluoro octyl sulfonic acid of 5% bicarbonate of ammonia, 1% salt of wormwood, 1.3% hydrogen peroxide, 0.02% Sodium Persulfate, 0.05% salt-free oleic imidazolinone, 5mg/L, 0.05% Mono Chloro Acetic Acid, 0.02% hydroxypropylcellulose, all the other are clear water.
A mixes according to 1:1 with B, and reference standard SY/T5405 measures its erosion rate, all less than 4.12g/m
2H.
The de-plugging process of the present embodiment, step is: with reference to Fig. 1, two cementing trucks are connected with a threeway mixing tank respectively, the threeway mixing tank is connected with the tubing valve of oil well or water injection well again, first inject spearhead, quinoline Benzyl Chloride, the naphthenic acid imidazoline acetate of 50mg/L, the propiolic alcohol of 10mg/L, all the other water of consisting of 0.1% OP-9,50mg/L of spearhead, injection rate is according to formula Q
BeforeCalculate, then above-mentioned A agent prescription and B agent prescription respectively injected to 7.5m3 according to the ratio of 1:1 respectively, and then the injection displacing liquid, displacing liquid consist of glycerol, the OP-10 of 200mg/L, all the other water of 1%, injection rate is according to formula Q
TopCalculate, inject clear water, injection rate is according to formula Q
ClearlyCalculate, closing well directly changes production over to after 6 hours.
The field conduct effect: with comparison before measure, injection pressure decline 1.4～3.1MPa.
Embodiment bis-
The unblocking agent of the present embodiment, consist of A agent prescription and the B agent prescription volume ratio by 1:1.3,
Wherein the mass percent of A agent prescription consists of: 12%HCL, 2%HF, 3% thionamic acid, 2% formic acid, 2% acetic acid, 2% succinic acid, 0.1% quinoline Benzyl Chloride quaternary ammonium salt, 0.5% quinoline dichlorobutane quaternary ammonium salt, 0.4% tributyl-methyl phosphonium ammonium iodide, 0.7% butynediol, 0.1% oleic imidazolinone acetate, 0.2% naphthenic acid imidazoline acetate, 0.6% alkylphenol polyoxyethylene sulfonic acid, 0.5% aliphatic amine polyoxyethylene ether sulfonic acid, 0.05% octadecyl trimethyl ammonium chloride, 0.2% dodecyl benzyl dimethyl ammonium chloride, all the other are clear water.
Wherein the mass percent of B agent prescription consists of: 2% sodium carbonate, 0.5% salt of wormwood, 4% bicarbonate of ammonia, 1% hydrogen peroxide, 1.5% ammonium persulphate, 3mg/LN-ethyl, N-hydroxyethyl perfluorooctyl sulfonyl ammonium phosphate, 1mg/L perfluorooctyl sulfonyl quaternary amine oxide compound, 0.03% salt-free lauric acid imidazoline, 0.02% salt-free Viscotrol C tetrahydroglyoxaline, 0.01% sodium chloroacetate, 0.02% diethylenetriamine carboxylate salt, 0.01% Natvosol, the 0.01% pair of octadecyl trimethyl quaternary ammonium salt, all the other are clear water.
A mixes according to 1:1.3 with B, and reference standard SY/T5405 measures its erosion rate, all less than 4.5g/m
2H.
The de-plugging process of the present embodiment, step is: with reference to Fig. 1, two cementing trucks are connected with a threeway mixing tank respectively, the threeway mixing tank is connected with the tubing valve of oil well or water injection well again, first inject spearhead, quinoline Benzyl Chloride, the naphthenic acid imidazoline acetate of 60mg/L, the propiolic alcohol of 15mg/L, all the other water of consisting of 0.15% OP-9,60mg/L of spearhead, injection rate is according to formula Q
BeforeCalculate, then above-mentioned A agent prescription and B agent prescription are injected according to the ratio of 1:1.3 respectively, the A agent prescription injects 6m
3, the B agent prescription injects 7.8m
3, and then inject displacing liquid, displacing liquid consist of glycerol, the OP-10 of 200mg/L, all the other water of 2%, injection rate is according to formula Q
TopCalculate, inject clear water, injection rate is according to formula Q
ClearlyCalculate, closing well directly changes production over to after 4 hours.
The field conduct effect: with comparison before measure, injection pressure decline 2.2～3.5MPa.
Embodiment tri-
The unblocking agent of the present embodiment, consist of A agent prescription and the B agent prescription volume ratio by 1.2:1,
Wherein the mass percent of A agent prescription consists of: 10%HCL, 1%HF, 2% nitric acid, 2% formic acid, 4% succinic acid, 0.6% quinoline benzyl dichloride quaternary ammonium salt, 0.5% Tetramethylammonium iodide, 0.3% propiolic alcohol, 0.4% naphthenic acid imidazoline acetate, 0.3% fatty alcohol-polyoxyethylene ether sulfonic acid, 0.8% aliphatic amine polyoxyethylene ether sulfonic acid, 0.1% dodecyl benzyl dimethyl ammonium chloride, 0.2% Dodecyl trimethyl ammonium chloride, all the other are clear water.
Wherein the mass percent of B agent prescription consists of: 2% saleratus, 6% bicarbonate of ammonia, 3% hydrogen peroxide, 2% ammonium persulphate, 2mg/LN-ethyl, N-hydroxyethyl perfluorooctyl sulfonyl ammonium phosphate, 2mg/L perfluorooctyl sulfonyl quaternary amine oxide compound, 0.1% salt-free oleic imidazolinone, 0.05% salt-free Viscotrol C tetrahydroglyoxaline, 0.02% sodium chloroacetate, 0.01% triethylene tetramine carboxylate salt, 0.01% hydroxypropylcellulose, the 0.05% pair of octadecyl trimethyl quaternary ammonium salt, all the other are clear water.
A mixes according to 1.2:1 with B, and reference standard SY/T5405 measures its erosion rate, all less than 5.4g/m
2H.
The de-plugging process of the present embodiment, step is: with reference to Fig. 1, two cementing trucks are connected with a threeway mixing tank respectively, the threeway mixing tank is connected with the tubing valve of oil well or water injection well again, first inject spearhead, quinoline Benzyl Chloride, the naphthenic acid imidazoline acetate of 50mg/L, the propiolic alcohol of 15mg/L, all the other water of consisting of 0.2% OP-9,70mg/L of spearhead, injection rate is according to formula Q
BeforeCalculate, then above-mentioned A agent prescription and B agent prescription are injected according to the ratio of 1.2:1 respectively, the A agent prescription injects 9m
3, the B agent prescription injects 7.5m
3, and then inject displacing liquid, fluorine surfactant, all the other water of the OP-10, the 3mg/L that consist of 1.5% glycerol, 300mg/L of displacing liquid, injection rate is according to formula Q
TopCalculate, inject clear water, injection rate is according to formula Q
ClearlyCalculate, closing well directly changes production over to after 8 hours.
The field conduct effect: with comparison before measure, injection pressure decline 1.7～4.1MPa.
Embodiment tetra-
The unblocking agent of the present embodiment, consist of A agent prescription and the B agent prescription volume ratio by 1:1,
Wherein the mass percent of A agent prescription consists of: 6%HCL, 7% thionamic acid, 3% formic acid, 2% citric acid, 0.5% quinoline Benzyl Chloride quaternary ammonium salt, 0.01% potassiumiodide, 0.01% tributyl-methyl phosphonium ammonium iodide, 0.4% propiolic alcohol, 0.2% oleic imidazolinone acetate, 0.3% lauric acid imidazoline acetate, 0.6% fatty alcohol-polyoxyethylene ether sulfonic acid, 1.0% alkylphenol polyoxyethylene sulfonic acid 0.3% aliphatic amine polyoxyethylene ether sulfonic acid, 0.02% dodecyl benzyl dimethyl ammonium chloride, 0.01% tetradecyl trimethyl ammonium chloride, all the other are clear water.
Wherein the mass percent of B agent prescription consists of: 6% bicarbonate of ammonia, 4% saleratus, 2% hydrogen peroxide, 2% ammonium persulphate, 2mg/L perfluoro octyl sulfonic acid, 3mg/L perfluorooctyl sulfonyl quaternary amine oxide compound, 0.2% salt-free oleic imidazolinone, 0.4% salt-free Viscotrol C tetrahydroglyoxaline, 0.3% ethylenediamine tetraacetic acid (EDTA), 0.02% triethylene tetramine carboxylate salt, 0.01% hydroxypropyl guar gum, 0.03% Natvosol, 0.02% hydroxypropylcellulose, all the other are clear water.
A mixes according to 1:1 with B, and reference standard SY/T5405 measures its erosion rate, all less than 4.6g/m
2H.
The de-plugging process of the present embodiment, step is: with reference to Fig. 1, two cementing trucks are connected with a threeway mixing tank respectively, the threeway mixing tank is connected with the tubing valve of oil well or water injection well again, first inject spearhead, quinoline Benzyl Chloride, the naphthenic acid imidazoline acetate of 50mg/L, the propiolic alcohol of 20mg/L, all the other water of consisting of 0.15% OP-9,80mg/L of spearhead, injection rate is according to formula Q
BeforeCalculate, then above-mentioned A agent prescription and B agent prescription are injected according to the ratio of 1:1 respectively, each injects 12m
3, and then inject displacing liquid, fluorine surfactant, all the other water of the OP-10, the 3mg/L that consist of 1.5% glycerol, 300mg/L of displacing liquid, injection rate is according to formula Q
TopCalculate, inject clear water, injection rate is according to formula Q
ClearlyCalculate, closing well is the row of returning after 4 hours, and the row of returning directly changes production over to after finishing.
The field conduct effect: with comparison before measure, injection pressure decline 2.3～4.5MPa.
Embodiment five
The unblocking agent of the present embodiment, consist of A agent prescription and the B agent prescription volume ratio by 1.4:1,
wherein the mass percent of A agent prescription consists of: 5%HCL, 2% nitric acid, 10% thionamic acid, 2% formic acid, 1% citric acid, 2% succinic acid, 0.3% quinoline Benzyl Chloride quaternary ammonium salt, 0.3% quinoline dichlorobutane quaternary ammonium salt, 0.01% potassiumiodide, 0.005% Tetramethylammonium iodide, 0.3% butynediol, 0.1% eneyne alcohol, 0.1% oleic imidazolinone acetate, 0.2% lauric acid imidazoline acetate, 0.1% naphthenic acid imidazoline acetate, 0.2% aliphatic acid polyethenoxy ether sulfonic acid, 0.4% alkylphenol polyoxyethylene sulfonic acid 0.5% aliphatic amine polyoxyethylene ether sulfonic acid, 0.01% octadecyl trimethyl ammonium chloride, 0.02% dodecyl benzyl dimethyl ammonium chloride, all the other are clear water.
Wherein the mass percent of B agent prescription consists of: 4% sodium carbonate, 1% salt of wormwood, 3% saleratus, 3% hydrogen peroxide, 3% SPC-D, 1.5mg/LN-ethyl, N-hydroxyethyl perfluorooctyl sulfonyl ammonium phosphate, 3mg/L perfluoro octyl sulfonic acid ammonium, 0.3% salt-free lauric acid imidazoline, 0.02% diethylenetriamine carboxylate salt, 0.01% Natvosol, the 0.03% pair of octadecyl trimethyl quaternary ammonium salt, all the other are clear water.
A mixes according to 1.4:1 with B, and reference standard SY/T5405 measures its erosion rate, all less than 5.2g/m
2H.
The de-plugging process of the present embodiment, step is: with reference to Fig. 1, two cementing trucks are connected with a threeway mixing tank respectively, the threeway mixing tank is connected with the tubing valve of oil well or water injection well again, first inject spearhead, quinoline Benzyl Chloride, the naphthenic acid imidazoline acetate of 30mg/L, the propiolic alcohol of 25mg/L, all the other water of consisting of 0.25% OP-9,80mg/L of spearhead, injection rate is according to formula Q
BeforeCalculate, then above-mentioned A agent prescription and B agent prescription are injected according to the ratio of 1:1 respectively, the A agent prescription injects 14m
3, the B agent prescription injects 10m
3, and then inject displacing liquid, fluorine surfactant, all the other water of the OP-10, the 3mg/L that consist of 1.5% glycerol, 300mg/L of displacing liquid, injection rate is according to formula Q
TopCalculate, inject clear water, injection rate is according to formula Q
ClearlyCalculate, closing well is the row of returning after 6 hours, and the row of returning directly changes production over to after finishing.
The field conduct effect: with comparison before measure, injection pressure decline 2.7～5.3MPa.
Embodiment six
The unblocking agent of the present embodiment, consist of A agent prescription and the B agent prescription volume ratio by 1:1.5,
wherein the mass percent of A agent prescription consists of: 15%HCL, 2%HF, 2% formic acid, 5% citric acid, 0.4% quinoline benzyl dichloride quaternary ammonium salt, 0.3% quinoline dichlorobutane quaternary ammonium salt, 0.005% sodium iodide, 0.02% tributyl-methyl phosphonium ammonium iodide, 0.2% propiolic alcohol, 0.5% first butyl alkynol, 0.3% lauric acid imidazoline acetate, 0.2% naphthenic acid imidazoline acetate, 0.7% fatty alcohol-polyoxyethylene ether sulfonic acid, 0.6% alkylphenol polyoxyethylene sulfonic acid 0.3% aliphatic amine polyoxyethylene ether sulfonic acid, 0.02% Dodecyl trimethyl ammonium chloride, 0.03% octadecyl trimethyl ammonium chloride, all the other are clear water.
Wherein the mass percent of B agent prescription consists of: 3% sodium carbonate, 2% salt of wormwood, 2% Sodium Persulfate, 3% SPC-D, 1.5mg/LN-ethyl, N-hydroxyethyl perfluorooctyl sulfonyl ammonium phosphate, 3mg/L perfluoro octyl sulfonic acid, 0.2% salt-free stearic acid tetrahydroglyoxaline, 0.3% salt-free lauric acid imidazoline, 0.4% ethylenediamine tetraacetic acid (EDTA), 0.01% diethylenetriamine carboxylate salt, 0.02% hydroxypropylcellulose, 0.01% biological polymer XC, the 0.02% pair of octadecyl trimethyl quaternary ammonium salt, all the other are clear water.
A mixes according to 1:1.5 with B, and reference standard SY/T5405 measures its erosion rate, all less than 4.0g/m
2H.
The de-plugging process of the present embodiment, step is: with reference to Fig. 1, two cementing trucks are connected with a threeway mixing tank respectively, the threeway mixing tank is connected with the tubing valve of oil well or water injection well again, first inject spearhead, quinoline Benzyl Chloride, the naphthenic acid imidazoline acetate of 90mg/L, the propiolic alcohol of 20mg/L, all the other water of consisting of 0.25% OP-9,60mg/L of spearhead, injection rate is according to formula Q
BeforeCalculate, then above-mentioned A agent prescription and B agent prescription are injected according to the ratio of 1:1.5 respectively, the A agent prescription injects 9.5m
3, the B agent prescription injects 14.25m
3, and then inject displacing liquid, fluorine surfactant, all the other water of the OP-10, the 3.5mg/L that consist of 2% glycerol, 400mg/L of displacing liquid, injection rate is according to formula Q
TopCalculate, inject clear water, injection rate is according to formula Q
ClearlyCalculate, closing well directly changes production over to after 4 hours.
The field conduct effect: with comparison before measure, injection pressure decline 3.2～4.8MPa.
Embodiment seven
The unblocking agent of the present embodiment, consist of A agent prescription and the B agent prescription volume ratio by 1.5:1,
wherein the mass percent of A agent prescription consists of: 10%HCL, 2%HF, 3% thionamic acid, 3% acetic acid, 2% succinic acid, 0.4% quinoline Benzyl Chloride quaternary ammonium salt, 0.1% quinoline dichlorobutane quaternary ammonium salt, 0.002% sodium iodide, 0.01% tributyl-methyl phosphonium ammonium iodide, 0.01% Tetramethylammonium iodide, 0.7% propiolic alcohol, 0.3% butynediol, 0.1% lauric acid imidazoline acetate, 0.3% naphthenic acid imidazoline acetate, 0.2% fatty alcohol-polyoxyethylene ether sulfonic acid, 0.5% alkylphenol polyoxyethylene sulfonic acid 0.5% aliphatic amine polyoxyethylene ether sulfonic acid, 0.1% tetradecyl trimethyl ammonium chloride, 0.5% dodecyl benzyl dimethyl ammonium chloride, all the other are clear water.
Wherein the mass percent of B agent prescription consists of: 6% sodium carbonate, 2% sodium bicarbonate, 4% ammonium persulphate, 2% SPC-D, 2mg/LN-ethyl, N-hydroxyethyl perfluorooctyl sulfonyl ammonium phosphate, 2mg/L perfluoro octyl sulfonic acid ammonium, 0.2% salt-free oleic imidazolinone, 0.4% salt-free Viscotrol C tetrahydroglyoxaline, 0.05% sodium chloroacetate, 0.01% diethylenetriamine carboxylate salt, 0.02% Natvosol, 0.01% hydroxypropylcellulose, the 0.02% pair of octadecyl trimethyl quaternary ammonium salt, all the other are clear water.
A mixes according to 1.5:1 with B, and reference standard SY/T5405 measures its erosion rate, all less than 5.3g/m
2H.
The de-plugging process of the present embodiment, step is: with reference to Fig. 1, two cementing trucks are connected with a threeway mixing tank respectively, the threeway mixing tank is connected with the tubing valve of oil well or water injection well again, first inject spearhead, quinoline Benzyl Chloride, the naphthenic acid imidazoline acetate of 90mg/L, the propiolic alcohol of 15mg/L, all the other water of consisting of 0.2% OP-9,60mg/L of spearhead, injection rate is according to formula Q
BeforeCalculate, then above-mentioned A agent prescription and B agent prescription are injected according to the ratio of 1.5:1 respectively, the A agent prescription injects 15m
3, the B agent prescription injects 10m
3, and then inject displacing liquid, fluorine surfactant, all the other water of the OP-10, the 2.5mg/L that consist of 2.5% glycerol, 300mg/L of displacing liquid, injection rate is according to formula Q
TopCalculate, inject clear water, injection rate is according to formula Q
ClearlyCalculate, closing well is the row of returning after 4 hours, and the row of returning directly changes production over to after finishing.
The field conduct effect: with comparison before measure, injection pressure decline 1.8～4.1MPa.
Embodiment eight
The unblocking agent of the present embodiment, consist of A agent prescription and the B agent prescription volume ratio by 1.2:1.
wherein the mass percent of A agent prescription consists of: 5%HCL, 2% nitric acid, 10% acetic acid, 2% succinic acid, 0.4% quinoline Benzyl Chloride quaternary ammonium salt, 0.2% quinoline dichlorobutane quaternary ammonium salt, 0.02% Tetramethylammonium iodide, 0.003% potassiumiodide, 0.1% propiolic alcohol, 0.2% eneyne alcohol, 0.2% oleic imidazolinone acetate, 0.3% naphthenic acid imidazoline acetate, 0.7% fatty alcohol-polyoxyethylene ether sulfonic acid, 1.2% alkylphenol polyoxyethylene sulfonic acid, 0.02% octadecyl trimethyl ammonium chloride, 0.01% dodecyl benzyl dimethyl ammonium chloride, all the other are clear water.
Wherein the mass percent of B agent prescription consists of: 3% bicarbonate of ammonia, 6% volatile salt, 2% hydrogen peroxide, 3% ammonium persulphate, 3mg/L perfluoro octyl sulfonic acid, 2mg/L perfluorooctyl sulfonyl quaternary amine oxide compound, 0.2% salt-free oleic imidazolinone, 0.3% salt-free Viscotrol C tetrahydroglyoxaline, 0.01% diethylenetriamine carboxylate salt, 0.02% triethylene tetramine carboxylate salt, 0.01% Natvosol, 0.01% biological polymer XC, the 0.03% pair of octadecyl trimethyl quaternary ammonium salt, all the other are clear water.
A mixes according to 1.2:1 with B, and reference standard SY/T5405 measures its erosion rate, all less than 3.8g/m
2H.
The de-plugging process of the present embodiment, step is: with reference to Fig. 1, two cementing trucks are connected with a threeway mixing tank respectively, the threeway mixing tank is connected with the tubing valve of oil well or water injection well again, first inject spearhead, quinoline Benzyl Chloride, the naphthenic acid imidazoline acetate of 60mg/L, the propiolic alcohol of 15mg/L, all the other water of consisting of 0.25% OP-9,70mg/L of spearhead, injection rate is according to formula Q
BeforeCalculate, then above-mentioned A agent prescription and B agent prescription are injected according to the ratio of 1.2:1 respectively, the A agent prescription injects 13m
3, the B agent prescription injects 11m
3, and then inject displacing liquid, fluorine surfactant, all the other water of the OP-10, the 3.5mg/L that consist of 3% glycerol, 500mg/L of displacing liquid, injection rate is according to formula Q
TopCalculate, inject clear water, injection rate is according to formula Q
ClearlyCalculate, closing well directly changes production over to after 6 hours.
The field conduct effect: with comparison before measure, injection pressure decline 2.7～3.5MPa.
Embodiment nine
The unblocking agent of the present embodiment, consist of A agent prescription and the B agent prescription volume ratio by 1.4:1,
wherein the mass percent of A agent prescription consists of: 5%HCL, 1%HF, 2% thionamic acid, 5% formic acid, 3% citric acid, 2% succinic acid, 0.4% quinoline Benzyl Chloride quaternary ammonium salt, 0.3% quinoline dichlorobutane quaternary ammonium salt, 0.1% propiolic alcohol, 0.3% methylbutynol, 0.1% eneyne alcohol 0.005% potassiumiodide, 0.02% tributyl-methyl phosphonium ammonium iodide, 0.2% oleic imidazolinone acetate 0.01% lauric acid imidazoline acetate 0.3% naphthenic acid imidazoline acetate, 0.7% fatty alcohol-polyoxyethylene ether sulfonic acid, 1.1% alkylphenol polyoxyethylene sulfonic acid, 0.02% tetradecyl trimethyl ammonium chloride, 0.05% dodecyl benzyl dimethyl ammonium chloride, all the other are clear water.
wherein the mass percent of B agent prescription consists of:, 5% sodium carbonate, 4% bicarbonate of ammonia, 2% hydrogen peroxide, 2.5% SPC-D, the perfluoro octyl sulfonic acid of 3mg/L, 2mg/L perfluorooctyl sulfonyl quaternary amine oxide compound, 0.2% salt-free stearic acid tetrahydroglyoxaline, 0.1% salt-free lauric acid imidazoline, 0.1% salt-free Viscotrol C tetrahydroglyoxaline, 0.05% sodium chloroacetate, 0.02% triethylene tetramine carboxylate salt, 0.02% hydroxypropylcellulose, 0.01% hydroxypropyl guar gum, 0.03% pair of octadecyl trimethyl quaternary ammonium salt, all the other are clear water.
A mixes according to 1.4:1 with B, and reference standard SY/T5405 measures its erosion rate, all less than 4.5g/m
2H.
The de-plugging process of the present embodiment, step is: with reference to Fig. 1, two cementing trucks are connected with a threeway mixing tank respectively, the threeway mixing tank is connected with the tubing valve of oil well or water injection well again, first inject spearhead, quinoline Benzyl Chloride, the naphthenic acid imidazoline acetate of 40mg/L, the propiolic alcohol of 20mg/L, all the other water of consisting of 0.3% OP-9,60mg/L of spearhead, injection rate is according to formula Q
BeforeCalculate, then above-mentioned A agent prescription and B agent prescription are injected according to the ratio of 1.4:1 respectively, the A agent prescription injects 16m
3, the B agent prescription injects 11.5m
3, and then inject displacing liquid, fluorine surfactant, all the other water of the OP-10, the 4.5mg/L that consist of 2% glycerol, 300mg/L of displacing liquid, injection rate is according to formula Q
TopCalculate, inject clear water, injection rate is according to formula Q
ClearlyCalculate, closing well is the row of returning after 6 hours, and the row of returning directly changes production over to after finishing.
The field conduct effect: with comparison before measure, injection pressure decline 2.3～4.6MPa.
Due to different oil fields, its oil reservoir of the oil and water well of different blocks is different from water filling layer geologic feature, the obstruction composition is different from situation, requirement to each component in the unblocking agent formula is also different, right includes but not limited to component and the content of described each formula of article, within any A, B agent prescription that comprises the described different components of right and different content composition all belongs to the scope of claim.
Claims (4)
1. an oil and water well self-generating foam unblocking agent, is characterized in that, by A agent prescription and B agent prescription, press (1～2): the volume ratio of (1～2) forms,
Wherein the mass percent of A agent prescription consists of: mineral acid 0～25%, organic acid 0～10%, quinoline quaternary ammonium salt 0.1～0.5%, alkynol 0.01～0.5%, salt compounded of iodine 0.001～0.05%, tetrahydroglyoxaline acetate 0.01～0.3%, polyoxyethylene ether sulfonic acid 0.01～1.5%, alkyl methyl quaternary ammonium salt 0.01～0.5%, surplus are that clear water forms;
Wherein the mass percent of B agent prescription consists of: carbonate 0.5～30%, superoxide 0.5～5%, fluorine surfactant 0～15mg/L, salt-free tetrahydroglyoxaline 0.01～0.5%, Fe stabilizer 0.01～0.1%, suds-stabilizing agent 0.05～1%, surplus are that clear water forms.
2. a kind of oil and water well self-generating foam unblocking agent according to claim 1 is characterized in that in the A agent prescription:
Described mineral acid comprises in mass ratio: HCL:HF: nitric acid: thionamic acid=1～25:0.5～20:0～20:0～20;
Described organic acid comprises in mass ratio: formic acid: acetic acid: citric acid: succinic acid=0～10:0～10:0～10:0～10;
The mixture of one or more in the described quinoline quaternary ammonium salt quaternary ammonium salt that to be the synthetic quaternary ammonium salt of quinoline and Benzyl Chloride or quinoline synthesize with the synthetic quaternary ammonium salt of benzyl dichloride or quinoline and dichlorobutane, the ratio of mixture is arbitrarily;
Described alkynol is one or more the mixture in propiolic alcohol or butynediol or methylbutynol or eneyne alcohol, and the ratio of mixture is arbitrarily;
Described salt compounded of iodine is one or more the mixture in potassiumiodide, sodium iodide, tributyl-methyl phosphonium ammonium iodide, Tetramethylammonium iodide, and the ratio of mixture is arbitrarily;
Described tetrahydroglyoxaline acetate is one or more the mixture in oleic imidazolinone acetate, lauric acid imidazoline acetate, naphthenic acid imidazoline acetate, and the ratio of mixture is arbitrarily;
Described polyoxyethylene ether sulfonic acid is one or more the mixture in fatty alcohol-polyoxyethylene ether sulfonic acid, alkylphenol polyoxyethylene sulfonic acid, aliphatic acid polyethenoxy ether, aliphatic amine polyoxyethylene ether, and the ratio of mixture is arbitrarily;
Described alkyl methyl quaternary ammonium salt is one or more the mixture in Dodecyl trimethyl ammonium chloride, tetradecyl trimethyl ammonium chloride, octadecyl trimethyl ammonium chloride, dodecyl benzyl dimethyl ammonium chloride, and the ratio of mixture is arbitrarily.
3. a kind of oil and water well self-generating foam unblocking agent according to claim 1 is characterized in that in the B agent prescription:
Described carbonate is one or more the mixture in sodium carbonate, sodium bicarbonate, salt of wormwood, saleratus, bicarbonate of ammonia, and the ratio of mixture is arbitrarily;
Described superoxide is hydrogen peroxide, Sodium Persulfate, the mixture of one or more in ammonium persulphate, SPC-D, and the ratio of mixture is arbitrarily;
Described fluorine surfactant is the N-ethyl, the mixture of one or more in N-hydroxyethyl perfluorooctyl sulfonyl ammonium phosphate, perfluoro octyl sulfonic acid ammonium, perfluoro octyl sulfonic acid, perfluorooctyl sulfonyl quaternary amine oxide compound, and the ratio of mixture is arbitrarily;
Described salt-free tetrahydroglyoxaline is one or more the mixture in salt-free oleic imidazolinone, salt-free lauric acid imidazoline, salt-free stearic acid tetrahydroglyoxaline, salt-free Viscotrol C tetrahydroglyoxaline, and the ratio of mixture is arbitrarily;
Described Fe stabilizer is one or more the mixture in sodium chloroacetate, edetate, diethylenetriamine carboxylate salt, triethylene tetramine carboxylate salt, and the ratio of mixture is arbitrarily;
Described suds-stabilizing agent is the also mixture of one or more in virgin rubber, two octadecyl trimethyl quaternary ammonium salt of hydroxypropyl guar gum, Natvosol, hydroxypropylcellulose, biological polymer, and the ratio of mixture is arbitrarily.
4. de-plugging process based on above-mentioned oil and water well self-generating foam unblocking agent, step is: 2 cementing trucks are connected with a threeway mixing tank respectively, and the threeway mixing tank is connected with the tubing valve of oil well or water injection well again, first with cementing truck, injects spearhead, injection rate Q
Before=wellbore volume+5m
3The quinoline Benzyl Chloride that consists of 0.1%～1% OP-9,50～100mg/L of spearhead, the naphthenic acid imidazoline acetate of 100～50mg/L, the propiolic alcohol of 10～30mg/L, then with a cementing truck, inject the A agent, a cementing truck injects the B agent, the injection of A agent and B agent must be carried out simultaneously, and the two injection discharge capacity proportional range is (1～2): after (1～2), A agent and B agent are injected and finished, inject displacing liquid, injection rate Q
Top=wellbore volume+2m
3, the glycerol that consists of 1%-5% of displacing liquid, the OP-10 of 200～500mg/L, fluorine surfactant 2～10mg/L, and then inject clear water, injection rate Q
Clearly=80% wellbore volume, closing well be more than 4 hours, the row of returning or directly change production over to.
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