CN100519986C - Combined removing plug by acid technology of oil well - Google Patents
Combined removing plug by acid technology of oil well Download PDFInfo
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- CN100519986C CN100519986C CNB2007100109292A CN200710010929A CN100519986C CN 100519986 C CN100519986 C CN 100519986C CN B2007100109292 A CNB2007100109292 A CN B2007100109292A CN 200710010929 A CN200710010929 A CN 200710010929A CN 100519986 C CN100519986 C CN 100519986C
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Abstract
The invention relates to an oil-well composite acid relieving-chock technique which is used for oil-well acidification relieving-chock. The invention utilizes the composite system formed by ordinary acid and high disperse system of oil and acid to relieve chock. It can increase acidification processing radius, relieve oil-layer chock, realize oil increasing production and avoid or alleviate acid damage degree near well zone. Its operational steps and essentials contain preparing normal acid liquor, preparing high disperse system of oil and acid and construction technology. The technology is easy to operate and has low cost. By utilizing this technology, it can relieve composite chock of oil-layer mineral grain and organic grain efficiently, increase acidification processing radius and achieve good effect of increasing production under small acid damage degree near well zone.
Description
Technical field:
The present invention relates to a kind of process that is used for the oil well acidation de-plugging, belong to operation technique class under the producing well.
Background technology:
Acidifying is one of de-plugging of well and crude oil volume increase measure means commonly used.The mineral grain of the corrosivity acid etching colmatation zone oil flow channel of conventional acidifying technology utilization acid recovers or the raising reservoir permeability, thereby reaches the purpose of oil well production increasing.Yet, the on-the-spot conventional acid acidifying technology of usefulness usually exists shortcomings such as treatment radius is little, the near wellbore zone acid etching is serious, behind the acidizing treatment because near wellbore zone rock matrix destroys serious, lose balancing of stresses, cause the phenomenon of shaking out easily, can cause the deficit of stratum, near wellbore zone, casing deformation when serious or frustrate disconnected, when especially strengthening the acidification radius, this kind situation is more aggravated, and the oil well ordinary production is caused serious adverse consequences.In recent years, the oil of some Oilfield using, sour dispersion acidifying technology be a kind of be that foreign minister, acid solution are the dispersion of interior phase with oil, its treatment effect is better, and can alleviate near wellbore zone acid etching degree, but exist construction cost and cross problems such as height, it is applied be restricted.
Summary of the invention:
The object of the invention is to provide a kind of and can effectively removes oil layer blocking, improves oil well output and can avoid or alleviate the oil well combined removing plug by acid process of stratum acid etching injury.
Technical scheme of the present invention is as follows:
This kind oil well combined removing plug by acid process is to utilize the conventional acid and the compound system of oil, the formation of sour high dispersive system to carry out the de-plugging construction, is issued in lower-cost situation and strengthens the acidification radius, removes oil layer blocking, realizes that crude oil increases production, avoids or alleviate the purpose of near wellbore zone acid etching extent of injury.
Implementation step of the present invention and technical essential are as follows:
1, preparation conventional acid acid solution.The percentage that raw material that preparation conventional acid acid solution is used and consumption account for the acid solution gross weight is as follows: hydrofluoric acid 3%; Hydrochloric acid 12%; Corrosion inhibiter acetylene alcohol 0.5%; Retardant dodecyl benzene sulfonate 0.6%; Iron stabilizers oxalic acid 3%; Anti-breast-demulsifier 1%; Clay stabilizer 16311%; All the other are clear water;
2, make up oil, sour high dispersive system.It is as follows that used raw material and consumption account for the system total weight percent: oil phase 49%; Water (containing mud acid) 45%; Surfactant softex kw 5%; Inorganic salts KCL1%;
3, construction technology:
(1) calculate compound sour consumption according to treatment radius and formation porosity, design formulas is as follows:
V＝(R
2—r
2)×h×Φ
In the formula, the compound sour consumption of V-, m
3
The R-treatment radius, m;
R-sleeve pipe radius, m;
The h-effective pay thickiness, m;
Φ-oil reservoir degree of porosity, %;
(2) determine conventional acid and oily, sour high dispersive system consumption according to the well history, generally determine the consumption of the two according to the ratio of 1:2;
(3) construction.----order of-displacement fluid injects into well aforesaid liquid conventional acid--oil, sour high dispersive system--successively, waits well then by clear water.
This technology can be implemented in the oil well production process as being used for de-plugging, as is used for oil reservoir processing and transformation, then implements before steam injection.
Process provided by the invention is easy to implement, and cost is lower, utilizes this method can effectively remove reservoir minerals particle and the compound obstruction of organic granular, increases treatment radius, obtains good effect of increasing production under the less situation of near wellbore zone acid etching degree.
Description of drawings:
Accompanying drawing carries out the process chart of the compound sour oil layer unblocking of oil well when handling for the present invention.
The specific embodiment:
The present invention is provided by following examples, is illustrated below in conjunction with accompanying drawing.
As shown in the figure: the technological process that the present invention carries out adopting when the compound sour oil layer unblocking of oil well is constructed comprises conventional acid jar, oil, sour high dispersive system jar, backwash water pot, low-pressure manifold, tank, fracturing unit truck, high pressure pipe joint, successively each hydraulic fluid is injected in oil well the oil well input ordinary production that can drive a well after certain hour is waited well during construction by aforementioned processing step and order.
Embodiment 1: determine 16 tons of conventional acid consumptions according to certain well well history, 8 tons of oily, sour high dispersive system consumptions; 16 tons of preparation conventional acid acid solution total amounts are raw materials used as follows with consumption: hydrofluoric acid 480kg, hydrochloric acid 1920kg, acetylene alcohol 80kg, dodecyl benzene sulfonate 96kg, oxalic acid 480kg; Anti-breast-demulsifier 160kg; Clay stabilizer 1631 160kg, all the other are clear water; Make up oil, 8 tons of sour high dispersive systems, raw materials used and consumption is as follows: oil phase 3920kg, water 3600kg, softex kw 400kg, potassium chloride 80kg.
Embodiment 2: determine 15 tons of conventional acid consumptions according to certain well well history, 7 tons of oily, sour high dispersive system consumptions; 15 tons of preparation conventional acid acid solutions, raw materials used, consumption is as follows: hydrofluoric acid 450kg, hydrochloric acid 1800kg, acetylene alcohol 75kg, dodecyl benzene sulfonate 90kg, oxalic acid 450kg, anti-breast-demulsifier 150kg; Clay stabilizer 1631 150kg, all the other are clear water; Make up oil, 7 tons of sour high dispersive systems, raw materials used and consumption is as follows: oil phase 3430kg, water 3150kg, softex kw 350kg, potassium chloride 70kg.
Claims (1)
1, a kind of oil well combined removing plug by acid process is characterized in that: this process is that the compound system that utilizes conventional acid and oil, sour high dispersive system to form carries out the de-plugging construction; Implementation step and technical essential are as follows:
(1), used raw material of preparation conventional acid acid solution preparation conventional acid acid solution and the consumption percentage that accounts for the acid solution gross weight is as follows: hydrofluoric acid 3%; Hydrochloric acid 12%; Corrosion inhibiter 0.5%; Retardant 0.6%; Iron stabilizers 3%; Anti-breast-demulsifier 1%; Clay stabilizer 1%, all the other are water;
(2), the percentage that make up oil, the used raw material of sour high dispersive system and consumption accounts for the system gross weight is as follows: oil phase 49%; Water 45%; Surfactant 5%; Inorganic salts 1%;
(3), construction technology:
1. calculate compound sour consumption according to treatment radius and formation porosity, design formulas is as follows:
V＝(R
2—r
2)×h×Φ
In the formula, the compound sour consumption of V-, m
3
The R-treatment radius, m;
R-sleeve pipe radius, m;
The h-effective pay thickiness, m;
Φ-oil reservoir degree of porosity, %;
2. determine conventional acid and oily, sour high dispersive system consumption according to the well history, generally determine the consumption of the two according to the ratio of 1:2;
3. construction,----order of-displacement fluid injects into well aforesaid liquid conventional acid--oil, sour high dispersive system--successively, waits well then by clear water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100109292A CN100519986C (en) | 2007-04-07 | 2007-04-07 | Combined removing plug by acid technology of oil well |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100109292A CN100519986C (en) | 2007-04-07 | 2007-04-07 | Combined removing plug by acid technology of oil well |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101033685A CN101033685A (en) | 2007-09-12 |
| CN100519986C true CN100519986C (en) | 2009-07-29 |
Family
ID=38730407
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2007100109292A Expired - Fee Related CN100519986C (en) | 2007-04-07 | 2007-04-07 | Combined removing plug by acid technology of oil well |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100519986C (en) |
Families Citing this family (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101285378B (en) * | 2008-05-09 | 2012-02-01 | 大庆汇联技术开发有限公司 | Activator composite plug removal technology |
| CN101949283A (en) * | 2010-06-22 | 2011-01-19 | 东营盛世石油科技有限责任公司 | Water reducing, de-plugging and yield increasing integrated process |
| CN102953718B (en) * | 2011-08-23 | 2015-03-25 | 中国石油化工股份有限公司 | Composite alternative acid dissolving method of hyposmosis oil layer |
| CN102942907A (en) * | 2012-11-23 | 2013-02-27 | 大庆百晟石油科技有限公司 | Novel profile control rapid degradation liquid |
| CN103436247B (en) * | 2013-08-23 | 2016-04-13 | 中国石油大学(华东) | A kind of retarded acid acidizing fluid |
| CN104612650B (en) * | 2014-12-31 | 2017-07-07 | 中国石油天然气股份有限公司 | For the oxidisability Compound-acid deep acidification method for removing blockage of water filling well acidizing de-plugging |
| CN105860948A (en) * | 2015-05-25 | 2016-08-17 | 成都能生材科技开发有限责任公司 | Preparation method of polymer viscosity-reducing profile-control resistance-reducing physical dissolution agent PSR |
| CN106085397B (en) * | 2016-06-17 | 2019-08-13 | 陕西延长石油（集团）有限责任公司（延长油矿管理局）油气勘探公司 | A kind of gas gathering pipeline de-plugging agent and preparation method thereof and method for removing blockage |
| CN106281278B (en) * | 2016-08-10 | 2017-10-24 | 延安市永科石油工程技术服务有限公司 | A kind of oil well, water injection well economic benefits and social benefits de-plugging agent and its application method |
| CN106555579A (en) * | 2017-01-01 | 2017-04-05 | 陕西海山能源发展有限公司 | A kind of oil-water well fixed tubular column acidification technique system |
| CN106593395A (en) * | 2017-01-01 | 2017-04-26 | 陕西海山能源发展有限公司 | Oil well selective acidizing process system |
| CN107060719A (en) * | 2017-01-01 | 2017-08-18 | 陕西海山能源发展有限公司 | A kind of oil well work-in-progress control treatment process system |
| CN110157399A (en) * | 2019-05-29 | 2019-08-23 | 马勇 | Coal bed gas well pit shaft de-plugging working solution and its application method |
| 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 |
-
2007
- 2007-04-07 CN CNB2007100109292A patent/CN100519986C/en not_active Expired - Fee Related
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| Publication number | Publication date |
|---|---|
| CN101033685A (en) | 2007-09-12 |
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