CN104974726A - Compound acid solution blocking remover for oilfield clogging - Google Patents
Compound acid solution blocking remover for oilfield clogging Download PDFInfo
- Publication number
- CN104974726A CN104974726A CN201510317159.0A CN201510317159A CN104974726A CN 104974726 A CN104974726 A CN 104974726A CN 201510317159 A CN201510317159 A CN 201510317159A CN 104974726 A CN104974726 A CN 104974726A
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- China
- Prior art keywords
- ammonium chloride
- acid
- oilfield
- blocking remover
- clogging
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/52—Compositions for preventing, limiting or eliminating depositions, e.g. for cleaning
- C09K8/524—Compositions for preventing, limiting or eliminating depositions, e.g. for cleaning organic depositions, e.g. paraffins or asphaltenes
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/52—Compositions for preventing, limiting or eliminating depositions, e.g. for cleaning
- C09K8/528—Compositions for preventing, limiting or eliminating depositions, e.g. for cleaning inorganic depositions, e.g. sulfates or carbonates
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K2208/00—Aspects relating to compositions of drilling or well treatment fluids
- C09K2208/32—Anticorrosion additives
Abstract
The present invention discloses a compound acid solution blocking remover for oilfield clogging. The blocking remover comprises the following components by weight: 10-15% of hydrochloric acid, 8-12% of succinic acid, 2-5% of a stabilizer, 0.3-0.8% of a corrosion inhibitor, 0.5-1% of an additive and 70-80% of water. The product provided by the invention is a composite acid compounded from a plurality of organic and inorganic acids, corrosion inhibitor, stabilizer, and additives through the scientific process conditions, has the characteristics of chemical stability, high dissolution rate, low damage and corrosion resistance, can effectively relieve the blockage and damage caused by inorganic and organic matters in the formation, increase the permeability of the formation and reach the effect of increasing yield and injection of oil wells.
Description
Technical field
The invention belongs to field of oilfield chemistry, be specifically related to a kind of composite acid deblocking agent for oil field blocking.
Background technology
Oil field development system oil well in process of production, can because production process a variety of causes causes oil layer blocking, permeability plugging, production declining.Along with the carrying out of oilfield exploitation work, reservoir is subject to injury in various degree, and initial stage of development, based on inorganic blocking, adopts conventional acidulation block releasing technique to improve Reservoir Permeability, removes the blocking that inorganics causes, achieve good effect.Along with continually developing of oil field, inject water increase, reservoir pressure, temperature decline, reservoir cold damage phenomenon is more and more serious, adopts conventional breaking block treatment thoroughly can not recover reservoir permeability, causes plugging removal effect worse and worse.Gone out in present soil-well jam thing outside inorganics, major part is organism, comprises various high molecular polymer.And " acidification to dispel block " that oil field is traditional, the plugging removal effect blocked this kind of high molecular polymer is poor.In order to improve de-plugging efficiency, strengthen the consumption of acid blindly, cause that treatment radius is little, immediate vicinity of wellbore acid etching is serious, because immediate vicinity of wellbore ma destroys serious after acidizing treatment, overbalance, easily cause phenomenon of shaking out, to seriously corrodeds such as Oil well rig, pipeline, pumps, even can cause immediate vicinity of wellbore formation depletion, casing deformation or frustrate disconnected.
Summary of the invention
In order to solve the problems of the technologies described above, the present invention is for providing a kind of composite acid deblocking agent for oil field blocking, product of the present invention is by the composite a kind of Compound-acid of the processing condition of science by chemical agents such as multiple organic acid, mineral acid, inhibiter, stablizer and auxiliary agents, there is chemically stable, the high and low injury of corrosion rate, the feature such as anticorrosive, effectively can remove the inorganics in stratum, blocking that organism causes and injury, improve the perviousness on stratum, reach the effect of oil and water well increasing yield and injection.
Technical scheme of the present invention is, a kind of for oil field blocking composite acid deblocking agent, it is characterized in that, its component and weight percent as follows:
Described stablizer is that MethacryloyloxyethylTrimethyl Trimethyl Ammonium Chloride and ammonium chloride mix by the weight ratio of 3:1; Described inhibiter is octadecylamine; Described auxiliary agent is dodecyl methyl sodium naphthalene sulfonate.
Further, its component and weight percent as follows:
Described stablizer is that MethacryloyloxyethylTrimethyl Trimethyl Ammonium Chloride and ammonium chloride mix by the weight ratio of 3:1; Described inhibiter is octadecylamine; Described auxiliary agent is dodecyl methyl sodium naphthalene sulfonate.
Beneficial effect of the present invention is:
1, the present invention is based on the acid fluid system of organic acid/mineral acid, keeps higher solution ration, under the effect of auxiliary agent dodecyl methyl sodium naphthalene sulfonate, can increase the EFFECTIVE RANGE of acid solution, realize the object of earth formation deep acidifying.
2, owing to the addition of inhibiter octadecylamine, it has polarity gene, can by metallic surface charge adsorption, form one deck unimolecular film at whole anode and cathode zone, thus stop or slow down corresponding electrochemical reaction, when there is corrosion product metallic surface or have dirt deposition, due to the existence of auxiliary agent dodecyl methyl sodium naphthalene sulfonate in the present invention, inhibiter octadecylamine film forming can be helped, reduce acid solution to the corrosion of the equipment fed through to, prevent formation contaminant.
Embodiment
By the following examples the present invention is specifically described.
Embodiment one:
For oil field blocking a composite acid deblocking agent, its component and weight percent as follows:
Described stablizer is that MethacryloyloxyethylTrimethyl Trimethyl Ammonium Chloride and ammonium chloride mix by the weight ratio of 3:1; Described inhibiter is octadecylamine; Described auxiliary agent is dodecyl methyl sodium naphthalene sulfonate.
Embodiment two:
For oil field blocking a composite acid deblocking agent, its component and weight percent as follows:
Described stablizer is that MethacryloyloxyethylTrimethyl Trimethyl Ammonium Chloride and ammonium chloride mix by the weight ratio of 3:1; Described inhibiter is octadecylamine; Described auxiliary agent is dodecyl methyl sodium naphthalene sulfonate.
Embodiment three:
For oil field blocking a composite acid deblocking agent, its component and weight percent as follows:
Described stablizer is that MethacryloyloxyethylTrimethyl Trimethyl Ammonium Chloride and ammonium chloride mix by the weight ratio of 3:1; Described inhibiter is octadecylamine; Described auxiliary agent is dodecyl methyl sodium naphthalene sulfonate.
Embodiment four:
For oil field blocking a composite acid deblocking agent, its component and weight percent as follows:
Described stablizer is that MethacryloyloxyethylTrimethyl Trimethyl Ammonium Chloride and ammonium chloride mix by the weight ratio of 3:1; Described inhibiter is octadecylamine; Described auxiliary agent is dodecyl methyl sodium naphthalene sulfonate.
Embodiment five: corrosion rate is tested
Get dry landwaste, be crushed to 80 orders, get the landwaste after 4 parts of pulverizing, every part of 2g, be placed in the composite acid deblocking agent of embodiment one to embodiment four respectively, the volume of unblocking agent is all 100mL, and temperature of reaction is 50 DEG C, and the setting reaction times is 1h, 2h, 4h, 6h, 8h, 10h and 12h, vacuum filtration, washing are dried to constant weight, weigh the weight of residue landwaste, calculate corrosion rate, the results are shown in Table 1.
Table 1 corrosion rate test result
As can be seen from the table, react after 10 hours, just substantially terminate with the reaction of landwaste, visible duration of the reaction is longer, is conducive to the deep acidification on stratum, and after reaction terminates, corrosion rate is more than 31.2%, and corrosion rate is high, and visible plugging removal effect of the present invention is excellent.
Embodiment six: corrosion inhibition is tested
According to industry standard SY/T5405-1996 acidifying inhibiter method for testing performance and evaluation index, the corrosion inhibition of embodiment one to the unblocking agent of embodiment four is evaluated, probe temperature 50 DEG C.Evaluation result is in table 2.
Table 2 corrosion inhibition evaluation result table
| Embodiment one | Embodiment two | Embodiment three | Embodiment four | |
| Corrosion rate (g/m 2·h) | 0.97 | 0.91 | 0.87 | 0.79 |
As can be seen from the table, unblocking agent of the present invention contains inhibiter octadecylamine, makes its corrosion inhibition excellent, meets the regulation of industry standard SY/T5405-1996.
Embodiment seven: the evaluation of plugging removal effect
Rate of permeation after adopting rock core-flowage experiment instrument to measure the original and de-plugging of core, rate of permeation after de-plugging and the ratio of original permeability are permeability resume figure, evaluate with the plugging removal effect of permeability resume figure to composite acid deblocking agent of the present invention, probe temperature is 50 DEG C, unblocking agent treatment time 10h.Evaluation result is in table 3.
Table 3 permeability resume figure evaluation result
| Embodiment one | Embodiment two | Embodiment three | Embodiment four | |
| Original permeability (mD) | 2189.73 | 2210.25 | 2169.83 | 2201.72 |
| Rate of permeation (mD) after de-plugging | 2147.71 | 2166.75 | 2129.82 | 2169.43 |
| Permeability resume figure (%) | 98.08 | 98.03 | 98.16 | 98.53 |
As can be seen from the table, permeability resume figure is all more than 98%, and de-plugging efficiency is high.
Above one embodiment of the present of invention have been described in detail, but described content being only preferred embodiment of the present invention, can not being considered to for limiting practical range of the present invention.All equalizations done according to the present patent application scope change and improve, and all should still belong within patent covering scope of the present invention.
Claims (2)
1. for oil field blocking a composite acid deblocking agent, it is characterized in that, its component and weight percent as follows:
Described stablizer is that MethacryloyloxyethylTrimethyl Trimethyl Ammonium Chloride and ammonium chloride mix by the weight ratio of 3:1; Described inhibiter is octadecylamine; Described auxiliary agent is dodecyl methyl sodium naphthalene sulfonate.
2. according to claim 1 a kind of for oil field blocking composite acid deblocking agent, it is characterized in that, its component and weight percent as follows:
Described stablizer is that MethacryloyloxyethylTrimethyl Trimethyl Ammonium Chloride and ammonium chloride mix by the weight ratio of 3:1; Described inhibiter is octadecylamine; Described auxiliary agent is dodecyl methyl sodium naphthalene sulfonate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201510317159.0A CN104974726A (en) | 2015-06-10 | 2015-06-10 | Compound acid solution blocking remover for oilfield clogging |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510317159.0A CN104974726A (en) | 2015-06-10 | 2015-06-10 | Compound acid solution blocking remover for oilfield clogging |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110628405A (en) * | 2019-10-14 | 2019-12-31 | 大庆市唯品科技开发有限公司 | Composite organic acid acidification blocking remover |
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| CN1800158A (en) * | 2004-12-30 | 2006-07-12 | 中国科学院理化技术研究所 | Alkylaryl sulfonate and its preparation method and uses |
| CN101196109A (en) * | 2007-12-27 | 2008-06-11 | 大庆石油学院 | Three-segment type block releasing technique for oil layer |
| CN102010698A (en) * | 2010-08-12 | 2011-04-13 | 天津市天诚化工有限公司 | Inorganic de-blocking agent |
| CN102250602A (en) * | 2011-05-06 | 2011-11-23 | 河北科技大学 | Composite acid blockage removing agent for oil well |
| CN102634332A (en) * | 2012-03-26 | 2012-08-15 | 中国石油天然气股份有限公司 | Blockage remover for decompression and steam injection in high clay content sandstone oil reservoir |
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-
2015
- 2015-06-10 CN CN201510317159.0A patent/CN104974726A/en active Pending
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| CN102010698A (en) * | 2010-08-12 | 2011-04-13 | 天津市天诚化工有限公司 | Inorganic de-blocking agent |
| CN102250602A (en) * | 2011-05-06 | 2011-11-23 | 河北科技大学 | Composite acid blockage removing agent for oil well |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110628405A (en) * | 2019-10-14 | 2019-12-31 | 大庆市唯品科技开发有限公司 | Composite organic acid acidification blocking remover |
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