CN1329476C - Acidification composition for oil well - Google Patents
Acidification composition for oil well Download PDFInfo
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- CN1329476C CN1329476C CNB2004100666339A CN200410066633A CN1329476C CN 1329476 C CN1329476 C CN 1329476C CN B2004100666339 A CNB2004100666339 A CN B2004100666339A CN 200410066633 A CN200410066633 A CN 200410066633A CN 1329476 C CN1329476 C CN 1329476C
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- Prior art keywords
- oil
- acidification
- oil well
- acid
- composition
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- 239000000203 mixture Substances 0.000 title claims abstract description 28
- 239000003129 oil well Substances 0.000 title claims abstract description 26
- 230000020477 pH reduction Effects 0.000 title abstract description 12
- 230000003301 hydrolyzing effect Effects 0.000 claims description 17
- 229920000141 poly(maleic anhydride) Polymers 0.000 claims description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
- 238000005260 corrosion Methods 0.000 abstract description 22
- 230000007797 corrosion Effects 0.000 abstract description 22
- 239000002253 acid Substances 0.000 abstract description 17
- 239000012530 fluid Substances 0.000 abstract description 15
- 239000004927 clay Substances 0.000 abstract description 10
- 230000000694 effects Effects 0.000 abstract description 9
- 239000010453 quartz Substances 0.000 abstract description 7
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 abstract description 7
- 238000005516 engineering process Methods 0.000 abstract description 5
- 239000002075 main ingredient Substances 0.000 abstract 1
- 229920001444 polymaleic acid Polymers 0.000 abstract 1
- 239000002689 soil Substances 0.000 abstract 1
- 239000003921 oil Substances 0.000 description 33
- 239000011435 rock Substances 0.000 description 18
- 239000000243 solution Substances 0.000 description 8
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 7
- 238000004090 dissolution Methods 0.000 description 7
- 239000010779 crude oil Substances 0.000 description 6
- 238000002347 injection Methods 0.000 description 6
- 239000007924 injection Substances 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 5
- 238000011084 recovery Methods 0.000 description 5
- 229910004298 SiO 2 Inorganic materials 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 3
- 230000035699 permeability Effects 0.000 description 3
- HNNQYHFROJDYHQ-UHFFFAOYSA-N 3-(4-ethylcyclohexyl)propanoic acid 3-(3-ethylcyclopentyl)propanoic acid Chemical compound CCC1CCC(CCC(O)=O)C1.CCC1CCC(CCC(O)=O)CC1 HNNQYHFROJDYHQ-UHFFFAOYSA-N 0.000 description 2
- OAKJQQAXSVQMHS-UHFFFAOYSA-N Hydrazine Chemical compound NN OAKJQQAXSVQMHS-UHFFFAOYSA-N 0.000 description 2
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 2
- 235000019738 Limestone Nutrition 0.000 description 2
- 230000003190 augmentative effect Effects 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- MTNDZQHUAFNZQY-UHFFFAOYSA-N imidazoline Chemical compound C1CN=CN1 MTNDZQHUAFNZQY-UHFFFAOYSA-N 0.000 description 2
- 239000003112 inhibitor Substances 0.000 description 2
- 239000006028 limestone Substances 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 238000010992 reflux Methods 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- WKBOTKDWSSQWDR-UHFFFAOYSA-N Bromine atom Chemical compound [Br] WKBOTKDWSSQWDR-UHFFFAOYSA-N 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- 238000010306 acid treatment Methods 0.000 description 1
- 239000013543 active substance Substances 0.000 description 1
- -1 aldehyde ketone amine Chemical class 0.000 description 1
- 150000008064 anhydrides Chemical class 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- GDTBXPJZTBHREO-UHFFFAOYSA-N bromine Substances BrBr GDTBXPJZTBHREO-UHFFFAOYSA-N 0.000 description 1
- 229910052794 bromium Inorganic materials 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
Landscapes
- Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
- Lubricants (AREA)
Abstract
The present invention relates to an acidification composition used for an oil well. The present invention mainly solves the problem that the previous technology does not relate to acidification effect data, or the problems of high corrosion rate of acid fluid for clay soil, low corrosion rate of the acid fluid for quartz, short operating range of the acid fluid, low acidification depth and the like existing in the prior art. The present invention has the technical scheme that the acidification composition used for an oil well adopts acidification fluid which uses polymaleic acid as a main ingredient so that the problems are better solved. The acidification composition used for an oil well can be used in the industrial exploitation of raw oil.
Description
Technical field
The present invention relates to a kind of souring composition that is used for oil well, the particularly oil well acidification composition of using about acid treatment of oil formation in the Oil extraction.
Background technology
Crude oil generally all is imbedded in underground very dark oil reservoir the inside, and these oil reservoir great majority all are made up of sedimentogeneous rock.Sedimentogeneous rock mainly contains two kinds and has form, i.e. sandstone and limestone.Crude oil in the sandstone oil reservoir mainly is to be stored in the hole or slit of rock; Crude oil in the limestone oil reservoir mainly is stored in the crack or solution cavity of rock.With regard to world wide, the sandstone oil reservoir be crude oil mainly contain form, China mainly contains based on sandstone, the oil reservoir that people are usually said mainly also is meant sandstone (sandstone) oil reservoir.
Sandstone is by rock particles (main component sio
2), cementing matter and hole three parts form.The hole of rock is not only the container of oil storage, also is the passage of fluid flow simultaneously, and the hole major part in the rock is interconnected, but disconnected stagnant pore is also arranged.The hole of rock is many more, big more, and the connectivity between them is just good more, and the flow condition of oil, gas, water or other fluid is just good more.Have this character just because of reservoir rock, crude oil could flow to the shaft bottom at a distance from oil reservoir.
With regard to the porosity or the rate of permeation of reservoir rock, in the difference oil recovery phase in different oil district or same oil district, its numerical value differs greatly.The oil reservoir of high porosity or high permeability can fuel-displaced in large quantities or water filling, and low permeability layer is then less fuel-displaced or not fuel-displaced, and water filling is few or annotate and do not intake, and this recovery ratio of just giving the stable high yield in oil field and improving crude oil brings huge difficulty.
Oil production through more than 100 years, most of in the world at present oil fields have all entered the exploitation middle and later periods, after oil reservoir has experienced primary oil recovery and secondary oil recovery, because the decline of blowhole rate and obstruction still have the petroleum-in-place above 60% to remain in the blowhole of oil reservoir.Because oil belongs to Nonrenewable resources, so how to satisfy under the prerequisite of economic benefit, fully the recover petroleum resource becomes problem eternal in the oilfield development process.In order to recover or improve the rate of permeation of oil reservoir, the oil field generally adopts acid solution that oil reservoir is handled with the raising oil recovery factor both at home and abroad, thereby the acidifying technology has become at present oil well production increasing both at home and abroad, one of important measures of intensified injection of wells, yet, adopt conventional acidizing fluid, but exist acid solution clay dissolution rate height, low to the quartz dissolution rate, be confined to de-plugging, acid solution operating distance is short, and shortcomings such as acidifying depth as shallow can not reach effective transformation effect; Conventional acid is to the excessive corrosion of clay cement, and the destructible ma causes near wellbore formation to cave in, and initiation is shaked out, impact effect; The conventional acid corrosion is stronger, and is more serious to corrosion such as oil, string of casing.Need work out a kind of novel acid solution and solve above production problem.
The gel acid that a kind of acidifying strata is used is disclosed among the Chinese patent literature CN1061033A.This gel acid is only applicable to carbonate strata acidification of oil gas well or fracture acidizing, and concrete component comprises hydrochloric acid, is the hcl acidifying inhibiter of main component with aldehyde ketone amine condenses, tensio-active agent, water-soluble acidproof positively charged ion and water.Do not relate to sandstone formation acidifying problem in the document.
A kind of acidifying corrosion inhibitor for oil well and preparation method thereof is disclosed among the Chinese patent literature CN1163301A.It is to be raw material by naphthenic acid imidazoline diamide Soxylat A 25-7, through the hydrochloric acid quaterisation, obtains a kind of water-soluble fabulous naphthenic acid imidazoline diamide Soxylat A 25-7 quaternary ammonium salt cationic acidification corrosion inhibitor after the dilution.Unexposed acidizing effect data in the document.
Summary of the invention
Technical problem to be solved by this invention is not relate to the acidizing effect data in the conventional art or exist acid solution to clay dissolution rate height in existing use technology, low to the quartz dissolution rate, make acid solution operating distance short, problems such as acidifying depth as shallow provide a kind of new composition that is used for oil well acidation.Said composition has the clay dissolution rate low, and to quartz dissolution rate height, the acidification time is long, the characteristics that the acidifying radius is big.
For solving the problems of the technologies described above, the technical solution used in the present invention is as follows: a kind of souring composition that is used for oil well comprises following component by weight percentage:
A) 84～93% water;
B) 2～15% hydrolytic polymaleic anhydride;
C) 1～10% HF.
In the technique scheme, the consumption preferable range of hydrolytic polymaleic anhydride is 3～8% by weight percentage.The molecular weight preferred version of hydrolytic polymaleic anhydride is greater than 300.
Being prepared as follows of the hydrolytic polymaleic anhydride of using among the present invention:
At first with 200 parts of cis-butenedioic anhydrides of parts by weight meter, 80 parts of water, add in the still, after the reflux, under determining temperature, drip off 100 parts of hydrogen peroxide (27.5% weight) in 3 hours, after reaction is finished, reflux 30 minutes, can obtain 400 parts of solid contents and be 50% weight, bromine number less than 160 milligrams/gram, molecular weight (vpo) greater than 300, the pale brown look hydrolytic polymaleic anhydride of clear product.
The present invention is used for the preparation method of the souring composition of oil well: the acidizing fluid component need only be got final product by institute's expense wiring solution-forming.
Among the present invention since the souring composition that is used for oil well to the corrosion ability of quartz greater than corrosion ability to clay, really played the matrix acidifying effect, its corrosion rate to clay can be less than 25%, to rock (SiO
2) the corrosion rate can reach more than 30%, for oil well production increasing, intensified injection of wells, raising water flooding later stage surplus oil tap the latent power and difficultly adopt reserves, the low permeability layer producing capacity provides strong technical support, has obtained better technical effect.
The invention will be further elaborated below by embodiment.
Embodiment
[embodiment 1]
It is 7%, 10% and 15% and 30% souring composition that the composition component that will be used for oil well acidation respectively is made into weight percent concentration, is 80 ℃ in the temperature of acidification reaction system, and the reaction times is 4 hours, respectively to SiO
2Rock sample (2877 meters of well depth) carries out the test of corrosion rate, and its test-results is as follows:
| The composition that is used for oil well acidation | Rock sample weight (gram) | Acidizing fluid concentration % (weight) | Acidizing fluid add-on (milliliter) | Rock sample corrosion rate |
| Molecular weight is 350 hydrolytic polymaleic anhydride | 5 | 7 | 30 | 11.20 |
| Molecular weight is 350 hydrolytic polymaleic anhydride | 5 | 10 | 30 | 32.84 |
| Molecular weight is 350 hydrolytic polymaleic anhydride | 5 | 15 | 30 | 34.89 |
| Molecular weight is 350 hydrolytic polymaleic anhydride | 5 | 30 | 30 | 51.4 |
[comparative example 1]
Mud acid is changed in acid among the embodiment 1, and its weight is composed as follows: 15%HCl+3%HF, and all the other conditions are constant, and its rock sample corrosion rate is 45.16%.
[embodiment 2]
The composition component that will be used for oil well acidation is made into weight concentration and is: 6% molecular weight is the souring composition that is used for oil well of hydrolytic polymaleic anhydride+4.5%HF of 500, tests by condition and the step of embodiment 1, and its result is as follows: to quartzy (SiO
2) rock sample corrosion rate is 32.75%, is 7.79% to the clay dissolution rate.
[embodiment 3]
The souring composition component that will be used for oil well is made into weight concentration and is: 6% molecular weight be 600 hydrolytic polymaleic anhydride+* souring composition of %HF, test by condition and the step of embodiment 1, its result is as follows:
[embodiment 4]
The souring composition component that will be used for oil well is made into weight concentration and is: 4% molecular weight is the souring composition of hydrolytic polymaleic anhydride+5%HF of 600, condition and step by embodiment 1 are tested, its result is as follows: quartzy corrosion rate is 31.89%, and the corrosion rate of clay is 17.46%.
[embodiment 5]
The souring composition component that will be used for oil well is made into weight concentration and is: 2% molecular weight is the souring composition of hydrolytic polymaleic anhydride+5%HF of 450, condition and step by embodiment 1 are carried out erodible test, its result is as follows: quartzy corrosion rate is 30.54%, and the corrosion rate of clay is 14.0%.
[embodiment 6]
The souring composition component that will be used for oil well is made into weight concentration and is: 5% molecular weight is the souring composition that 700 hydrolytic polymaleic anhydride+3.0%HCl+1.0%HF forms, condition and step by embodiment 1 are carried out erodible test, just changing temperature is 60 ℃, and its test-results is as follows:
| Souring temperature (℃) | Rock sample weight (gram) | Acidizing fluid add-on (milliliter) | Acidificatoin time (hour) | Corrosion rate (%) |
| 60 | 5.0 | 30 | 0.5 | 30.1 |
| 60 | 5.0 | 30 | 2.0 | 30.1 |
| 60 | 5.0 | 30 | 4.0 | 30.1 |
| 60 | 5.0 | 30 | 6.0 | 30.1 |
| 60 | 5.0 | 30 | 9.0 | 33.2 |
| 60 | 5.0 | 30 | 12.0 | 34.6 |
[comparative example 2]
Change the acid among the embodiment 6 into mud acid, its weight is composed as follows: 15%HCl+3%HF, and all the other conditions are constant, and its test-results is as follows:
| Souring temperature (℃) | Rock sample weight (gram) | Acidizing fluid add-on (milliliter) | Acidificatoin time (hour) | Corrosion rate (%) |
| 60 | 5.0 | 30 | 0.5 | 42 |
| 60 | 5.0 | 30 | 2.0 | 42 |
| 60 | 5.0 | 30 | 4.0 | 42 |
| 60 | 5.0 | 30 | 6.0 | 42 |
| 60 | 5.0 | 30 | 9.0 | 42 |
| 60 | 5.0 | 30 | 12.0 | 42 |
[embodiment 7]
Certain oilfield reservoir lithology is better, poor properties, ma quartz content height (content is 53～72%), conventional acidizing fluid is relatively poor at this area's effect, adopt the acidizing fluid corrosion ability stronger among the embodiment 6 to this stratum quartz, carry out the matrix transformation, obtained augmented injection effect preferably after the acidifying, average individual well daily water-injection rate is by 10.3 meters
3/ sky rises to 72.9 meters
3/ day, 62.6 meters of individual well augmented injections
3/ day, water injection intensity is by 0.507 meter
3/ day MPa rises to 5.040 meters
3/ day MPa, 210 days average effective phases, 38.3 meters of the former average daily output liquid of every mouthful of oil well of its correspondence
3, 3.2 tons of average day produce oils, average day production fluid is 46.9 meters after the acidifying
3, 5.1 tons of average day produce oils.
Claims (3)
1, a kind of souring composition that is used for oil well comprises following component by weight percentage:
A) 84～93% water;
B) 2～15% hydrolytic polymaleic anhydride;
C) 1～10% HF.
2,, it is characterized in that the consumption of hydrolytic polymaleic anhydride is 3～8% by weight percentage according to the described souring composition that is used for oil well of claim 1.
3, according to the described souring composition that is used for oil well of claim 1, the molecular weight that it is characterized in that hydrolytic polymaleic anhydride is greater than 300.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100666339A CN1329476C (en) | 2004-09-24 | 2004-09-24 | Acidification composition for oil well |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100666339A CN1329476C (en) | 2004-09-24 | 2004-09-24 | Acidification composition for oil well |
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|---|---|
| CN1752174A CN1752174A (en) | 2006-03-29 |
| CN1329476C true CN1329476C (en) | 2007-08-01 |
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|---|---|---|---|
| CNB2004100666339A Expired - Lifetime CN1329476C (en) | 2004-09-24 | 2004-09-24 | Acidification composition for oil well |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102816277B (en) * | 2012-06-29 | 2016-05-04 | 扬州润达油田化学剂有限公司 | The preparation method of polyhydroxy polycarboxylic acid for acidifying |
| CN103694979B (en) * | 2013-12-12 | 2016-06-08 | 中国石油天然气股份有限公司 | Polyhydrogen acid composition and application thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4332688A (en) * | 1976-12-22 | 1982-06-01 | Texaco Inc. | Aqueous acid solution containing an acrylamido alkanesulfonic acid polymer |
| CN1030809A (en) * | 1988-06-08 | 1989-02-01 | 武汉市长江化工厂 | Improve the method and the solvent of oil-well strata penetration |
| CN1100130A (en) * | 1993-09-09 | 1995-03-15 | 吉林省油田管理局钻采工艺研究院 | Sensitive oil reservoir acidification treatment fluid |
| CN1208755A (en) * | 1998-07-15 | 1999-02-24 | 辽宁石油勘探局钻采工艺研究院 | Method for prepn. of composite, high efficiency and active acid for de-plugging of well |
| CN1424379A (en) * | 2001-12-12 | 2003-06-18 | 刘广飞 | Saline-alkali soil improver |
-
2004
- 2004-09-24 CN CNB2004100666339A patent/CN1329476C/en not_active Expired - Lifetime
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4332688A (en) * | 1976-12-22 | 1982-06-01 | Texaco Inc. | Aqueous acid solution containing an acrylamido alkanesulfonic acid polymer |
| CN1030809A (en) * | 1988-06-08 | 1989-02-01 | 武汉市长江化工厂 | Improve the method and the solvent of oil-well strata penetration |
| CN1100130A (en) * | 1993-09-09 | 1995-03-15 | 吉林省油田管理局钻采工艺研究院 | Sensitive oil reservoir acidification treatment fluid |
| CN1208755A (en) * | 1998-07-15 | 1999-02-24 | 辽宁石油勘探局钻采工艺研究院 | Method for prepn. of composite, high efficiency and active acid for de-plugging of well |
| CN1424379A (en) * | 2001-12-12 | 2003-06-18 | 刘广飞 | Saline-alkali soil improver |
Non-Patent Citations (4)
| Title |
|---|
| 四川油气田压裂酸化液体技术新进展 刘同斌等，石油与天然气化工 创刊30周年专辑 2002 * |
| 油层复合保护技术中酸液的影响 曹维政等，大庆油田地质与开发，第22卷第2期 2003 * |
| 海上油田酸化酸液的选择及现场应用 张振峰等，石油钻采工艺，第23卷第5期 2001 * |
| 海上油田酸化酸液的选择及现场应用 张振峰等，石油钻采工艺，第23卷第5期 2001;四川油气田压裂酸化液体技术新进展 刘同斌等，石油与天然气化工 创刊30周年专辑 2002;油层复合保护技术中酸液的影响 曹维政等，大庆油田地质与开发，第22卷第2期 2003 * |
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| CN1752174A (en) | 2006-03-29 |
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