CN104531113B - Well cement tolerance blocking - Google Patents
Well cement tolerance blocking Download PDFInfo
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- CN104531113B CN104531113B CN201410815357.5A CN201410815357A CN104531113B CN 104531113 B CN104531113 B CN 104531113B CN 201410815357 A CN201410815357 A CN 201410815357A CN 104531113 B CN104531113 B CN 104531113B
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- formaldehyde
- well cement
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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
- C09K8/42—Compositions for cementing, e.g. for cementing casings into boreholes; Compositions for plugging, e.g. for killing wells
- C09K8/46—Compositions for cementing, e.g. for cementing casings into boreholes; Compositions for plugging, e.g. for killing wells containing inorganic binders, e.g. Portland cement
- C09K8/467—Compositions for cementing, e.g. for cementing casings into boreholes; Compositions for plugging, e.g. for killing wells containing inorganic binders, e.g. Portland cement containing additives for specific purposes
- C09K8/487—Fluid loss control additives; Additives for reducing or preventing circulation loss
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- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Inorganic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses a kind of well cement tolerance blocking, component and weight fraction are as follows：Acetone：Sodium hydrogensulfite：Formaldehyde：The molar ratio of Vc is 6：3：1：1.5 is as follows the step of preparation：(1) acetone, sodium hydrogensulfite, formaldehyde, are added to reaction kettle and obtained in water, stirred evenly, be configured to aqueous solution by molar ratio on request in order；(2) and then causticity base catalysis is used；(3) 80 DEG C of reaction temperature, when insulation 3 is small, up to polymeric articles；(4) Vc compoundings are added after obtaining product, up to well cement tolerance blocking.The drag-reduction effect of well cement tolerance blocking provided by the invention is preferable, but can high temperature resistant, after adding this product in oil-well cement, there are not serious settlement issues in cement mortar, and contributes to cement strength to develop.
Description
Technical field
The invention belongs to oil-well cement used additives field, is a kind of well cement tolerance blocking.
Background technology
General drag reducer play the role of to cement mortar drag reduction at the same time, formed microcosmic because destroying electrostatic attraction
Structure, tends not to effective suspension cement granules, and separates out free water, produces phase separation, that is, free water occurs and from bottom
Behavior of Hardened Cement Paste density gradient is obtained to top, this is that directional well and horizontal well are most abstained from；In addition, some drag reducers are there are slow setting and rise
Steep to obtain side effect；The problems such as some drag reducers are incompatible with mortar architecture or other additives, and strength development is slow.
According to retrieval, find as follows with the relevant patent document of the application, specific disclosure as follows：
1st, CN102382270A discloses a kind of oil well cement slurry drag reducer and preparation method thereof, and the oil well cement paste subtracts
Resist mainly by 10~80 parts of allyl alcohol polyethenoxy ether, 15~80 parts of acrylic acid, the copolymerization of 15~35 parts of hydroxy-ethyl acrylate and
Into.
2nd, CN1050211 discloses a kind of system of the sulfonated ketone aldehyde polycondensate of the high molecular weight as well cement tolerance blocking
Preparation Method.Sulfonating agent is made using the aqueous slkali of sodium pyrosulfite, acetone and formaldehyde makees monomer, adjustment ketone, aldehyde, sodium pyrosulfite
Proportioning, controls preference temperature, changes process conditions, with the approach that heats up flow back afterwards of first cooling down, makes sulfonating reaction and polycondensation
Reaction is carried out at the same time, and products therefrom is through being dried to solid product.This law raw material is easy to get, and production cost is low, and the sulfonation degree of product is high,
The rheological characteristic of cement mortar can be improved.Product is all preferable in room temperature or high temperature resistance reducing performance, also with certain filtrate-loss control and slow setting
Effect, easy to site operation.
3rd, a kind of manufacturing process of modified naphthalene monosulfonic formaldehyde condensate as cement anti-drag agent for oil well of CN1052886, is closed with chemistry
Into method produce the naphthalene sulfonic acid-formaldehyde condensation product of high polymerization degree, then make first kind modifying agent with oxidizing substance, use alkali
Class material makees the second class modifying agent.
4th, a kind of fire resistant low-density oil well cement lightening agents of CN101260291, are made of the weight ratio of following composition：It is super
40 parts of light weight cement, 28 parts of floating bead, 11.5 parts of sodium sulphate, 10 parts of micro- silicon, 5 parts of activator, 2.5 parts of drag reducer, alkali formula chlorination
3 parts of aluminium.Present invention effect：Palliative is to reduce cement slurry density, so that the static pressure of cementing slurry column declines.This has
Help prevent the leakage caused by the rupture of weak formation, ensure cementing quality.The hole condition of solution：Leakiness stratum and underground heat
Well, Thermal Production Well Cementing construction problem.Products characteristics：High temperature resistant, density are low, intensity meets the requirements.This palliative advantage can be used
Between 38 DEG C -120 DEG C of circulating temperature, the material of selection, with first requirement after hydrated reaction of cement be high temperature resistant, second will
Seeking Truth reduces density, can so meet the requirement of casing and cementing.
The technical solution that the component of above-mentioned drag reducer is provided with the application differs greatly, the drag reducer emphasis that the application provides
Solve drag reducer and be unable to Effective Suspension cement granules, what precipitation free water and drag reducer influence cement strength developed slowly asks
Topic.
The content of the invention
It is an object of the invention in place of overcome the deficiencies in the prior art, there is provided a kind of well cement tolerance blocking, this drag reduction
Agent emphasis solves drag reducer and is unable to Effective Suspension cement granules, and separating out free water and drag reducer influences cement strength development and delay
The problem of slow.
The present invention realizes that the technical solution of purpose is as follows：
A kind of well cement tolerance blocking, component and weight fraction are as follows：
Acetone：Sodium hydrogensulfite：Formaldehyde：The molar ratio of Vc is 6：3：1：1.5.
Moreover, the step of preparing is as follows：
(1) acetone, sodium hydrogensulfite, formaldehyde, are added to reaction kettle and obtained in water by molar ratio on request in order, and stirring is equal
It is even, it is configured to aqueous solution；
(2) and then causticity base catalysis (the 2% of solid content) is used；
(3) 80 DEG C of reaction temperature, when insulation 3 is small, up to polymeric articles；
(4) Vc compoundings are added after obtaining product, up to well cement tolerance blocking.
Moreover, the caustic alkali is NaOH or KOH.
The advantages of present invention obtains and beneficial effect are：
1st, the drag-reduction effect of well cement tolerance blocking provided by the invention is preferable, and energy high temperature resistant, temperature in use are up to 180
DEG C, after adding this product in oil-well cement, there are not serious settlement issues in cement mortar, and contributes to cement strength to obtain
Development.
2nd, well cement tolerance blocking provided by the invention adds Vc (vitamin C) in component, compensate for drag reducer to water
The influence of mud strength development, while dispersion effect is ensured, ensure that the intensity of cement.
3rd, the Vc contained in well cement tolerance blocking provided by the invention also has certain dispersiveness, and in cement composition
Polymer have certain synergistic effect, be further ensured that dispersion effect.
4th, when well cement tolerance blocking dosage provided by the invention is 1.5% (BWOC), it is possible to play scattered well
Effect.
5th, well cement tolerance blocking provided by the invention can be added directly into cement mortar and use.
Brief description of the drawings
Fig. 1 is lab diagram of the present invention.
Embodiment
Below by specific embodiment, the invention will be further described, and following embodiments are descriptive, is not limit
Qualitatively, it is impossible to which protection scope of the present invention is limited with this.
A kind of well cement tolerance blocking, component and weight fraction are as follows：
Acetone：Sodium hydrogensulfite：Formaldehyde：The molar ratio of Vc is 6：3：1：1.5
The preparation method of above-mentioned drag reducer is as follows：
(1) acetone, sodium hydrogensulfite, formaldehyde, are added to reaction kettle and obtained in water by molar ratio as requested in order, stirring
Uniformly, it is configured to aqueous solution；
(2) and then causticity base catalysis is used, (NaOH or KOH ﹚ additions are 2wt% to caustic alkali；
(3) 80 DEG C of reaction temperature, when insulation 3 is small, up to polymeric articles.
(4) Vc compounding mixings are added after obtaining product, up to well cement tolerance blocking.
Use implementation
A bite evaluation well in gram Shen805Jing Shi China Tarim Basin Ku Che oil fields, 156 DEG C of well temperature, density 2.34g/cm3Have
There are saline bed in machine salt mud, underground, and surely 2.37g/ is used for the net anti-anti- organic salt pollution of salt wriggling, cementing design for guarantee pressure
cm3The anti-organic salt pollution mortar architecture of undersaturation brine, it is as follows according to technical parameter requirement mass fraction：
Acetone：Sodium hydrogensulfite：Formaldehyde：The molar ratio of Vc is 6：3：1：1.5 dispersants prepared are added in cement mortar,
Not only the rheological property of high-density cement mortar had been met, but also ensure that the stability of slurry well so that well cementation smoothly completes.
Claims (1)
- A kind of 1. well cement tolerance blocking, it is characterised in that：Component and weight fraction are as follows：Acetone：Sodium hydrogensulfite：Formaldehyde：The molar ratio of Vc is 6：3：1：1.5；The step of preparation, is as follows：(1) molar ratio on request, is in order added to acetone, sodium hydrogensulfite, formaldehyde in the water of reaction kettle, stirs evenly, match somebody with somebody Aqueous solution is made；(2) and then causticity base catalysis is used, caustic alkali addition is 2wt%；(3) 80 DEG C of reaction temperature, when insulation 3 is small, up to polymeric articles；(4) Vc compoundings are added after obtaining product, up to well cement tolerance blocking；The caustic alkali is NaOH or KOH；Use condition：A bite evaluation well in gram Shen805Jing Shi China Tarim Basin Ku Che oil fields, 156 DEG C of well temperature, density 2.34g/cm3 Organic salt mud, there is saline bed in underground, surely wriggles anti-organic salt pollution for net anti-salt to ensure pressure, and cementing design uses 2.37g/cm3The anti-organic salt pollution mortar architecture of undersaturation brine, it is as follows according to technical parameter requirement mass fraction：Third Ketone：Sodium hydrogensulfite：Formaldehyde：The molar ratio of Vc is 6：3：1：1.5 dispersants prepared are added in cement mortar, both meet height The rheological property of density cement slurry, and ensure that the stability of slurry well so that well cementation smoothly completes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410815357.5A CN104531113B (en) | 2014-12-24 | 2014-12-24 | Well cement tolerance blocking |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410815357.5A CN104531113B (en) | 2014-12-24 | 2014-12-24 | Well cement tolerance blocking |
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| Publication Number | Publication Date |
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| CN104531113A CN104531113A (en) | 2015-04-22 |
| CN104531113B true CN104531113B (en) | 2018-04-20 |
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| CN201410815357.5A Active CN104531113B (en) | 2014-12-24 | 2014-12-24 | Well cement tolerance blocking |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105601853B (en) * | 2015-10-30 | 2018-02-13 | 卫辉市化工有限公司 | A kind of oil-well cement drag reducer and preparation method thereof |
| CN111218263B (en) * | 2020-02-27 | 2022-07-01 | 成都欧美克石油科技股份有限公司 | Drag reducer for oil well cement |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101338183A (en) * | 2007-07-04 | 2009-01-07 | 中国石油集团工程技术研究院 | Anti-salt high-density cement mortar |
| CN102939354A (en) * | 2010-05-25 | 2013-02-20 | 得克萨斯大学体系董事会 | Surfactant-less alkaline-polymer formulations for recovering reactive crude oil |
-
2014
- 2014-12-24 CN CN201410815357.5A patent/CN104531113B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101338183A (en) * | 2007-07-04 | 2009-01-07 | 中国石油集团工程技术研究院 | Anti-salt high-density cement mortar |
| CN102939354A (en) * | 2010-05-25 | 2013-02-20 | 得克萨斯大学体系董事会 | Surfactant-less alkaline-polymer formulations for recovering reactive crude oil |
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| Publication number | Publication date |
|---|---|
| CN104531113A (en) | 2015-04-22 |
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Address after: 065001 Langfang economic and Technological Development Zone, Hebei Road, No. 600 Applicant after: GREAT TECHNOLOGY CO.,LTD. Address before: 065001 Langfang economic and Technological Development Zone, Hebei Road, No. 600 Applicant before: LANGFANG CHRONOTECH PETROLEUM TECHNOLOGY Co.,Ltd. |
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Effective date of registration: 20230525 Address after: 100728 No. 22 North Main Street, Chaoyang District, Beijing, Chaoyangmen Patentee after: CHINA PETROLEUM & CHEMICAL Corp. Patentee after: Sinopec Petroleum Engineering Technology Research Institute Co.,Ltd. Patentee after: SHELFOIL PETROLEUM EQUIPMENT & SERVICES Co.,Ltd. Address before: 065001 No.600 Chuangye Road, Langfang Economic and Technological Development Zone, Hebei Province Patentee before: GREAT TECHNOLOGY CO.,LTD. |