CN104818007B - Oil-well cement gas expansion agent - Google Patents
Oil-well cement gas expansion agent Download PDFInfo
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- CN104818007B CN104818007B CN201510112506.6A CN201510112506A CN104818007B CN 104818007 B CN104818007 B CN 104818007B CN 201510112506 A CN201510112506 A CN 201510112506A CN 104818007 B CN104818007 B CN 104818007B
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- cement
- oil
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- gas expansion
- stabilizer
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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
- C09K8/473—Density reducing additives, e.g. for obtaining foamed cement compositions
Abstract
The invention discloses a kind of oil-well cement gas expansion agent, is made up of the foaming agent of 30~40 parts by weight and the stabilizer of 60~70 parts by weight, and the foaming agent is sulfonyl hydrazines compound, and the stabilizer is at least one of silica, calcium silicates；The oil-well cement gas expansion agent can be not only used for daily dry-mixed operation, can be used for situ wet and mixes up industry；It is acted in cement mortar, is started to discharge nitrogen when temperature reaches 35 DEG C under alkalescence condition, micro-bubble can be made to be evenly distributed in cement mortar by the effect of stabilizer in component, and it is only nitrogen to produce gas, does not corrode tubing；In addition, the oil-well cement gas expansion agent and other cement additive compatibilities are good, there is preferable compatibility with other cement additives；And can effective compensation cement slurry sets when the pressure loss and volume contraction, prevent cement the well oil gas water breakthrough.
Description
Technical field
The present invention relates to oil gas well cementing operation engineer operation technical field, more particularly to a kind of oil-well cement gas expansion agent.
Background technology
Annular space Oil, Water, Gas alters the outstanding problem that groove is always domestic and international petroleum industry common concern in Oil/gas Well, so far not
Can fundamentally solve, very big economic loss is caused to various countries' petroleum industry.Annular space alters groove after well cementation and cement sheath is cementing
Bad is always the outstanding problem for influenceing evaluating production capacity, flood effectiveness and oil gas well production, if interlayer sealing is bad, high pressure zone
Fluid will necessarily channelling enter low pressure layer, cause petroleum resources be lost in or reservoir damage, to environmental protection and a grave danger.
In recent years, each oil field successively employs a variety of anti-channeling technologies both at home and abroad, but does not tackle the problem at its root, wherein critically important
Any is the essence understanding deficiency to altering groove.It fact proved and alter groove and raising second interface after fundamentally solving the problems, such as well cementation
Bonding quality, it is necessary to solve the problems, such as the volume contraction of cement mortar first.And it is exactly compensation water that gas expansion agent is added in cement
Mud volume contraction is so as to preventing from altering one of effective measures that groove improves cementing quality.
Gas expansion agent mainly includes two kinds by gas type classification, is hydrogen expander agent and Nitrogen Swelling Agent respectively.Its
In, hydrogen expander agent generally utilizes the metallic aluminium powder of purified processing, and reaction in the basic conditions is released a large amount of hydrogen and produced
Expansion effect.Reaction produces a large amount of hydrogen rapidly in the basic conditions for the gas expansion agent, is unfavorable for scene construction with slurry, and hydrogen
There is corrosion phenomenon in gas, easily cause the generation of hydrogen embrittlement accident to sleeve pipe；Nitrogen Swelling Agent is presently mainly to be made using azo-compound
For source of the gas, it is set to react releasing nitrogen under the alkalescence condition of certain temperature to produce expansion effect by adding gasifying-aid agent, can
Dry-mixed or wet mixing, scene convenience with slurry, but reacted gas CO, the NH supervened of azo-compound3And portion of product
Tubing can be caused in various degree to corrode.
The content of the invention
It is an object of the invention to provide a kind of volume contraction for being capable of effective compensation cement mortar, and annular space is altered after preventing well cementation
Groove, improve the oil-well cement gas expansion agent of cement sheath interface agglutination quality.
Therefore, technical scheme is as follows：
A kind of oil-well cement gas expansion agent, by the foaming agent of 30~40 parts by weight and the stabilizer structure of 60~70 parts by weight
Into the foaming agent is sulfonyl hydrazines compound, and the stabilizer is at least one of silica, calcium silicates.
Preferably, the foaming agent is 3,3- disulfonyl hydrazides diphenyl sulphone (DPS), benzene sulfonyl hydrazide, to (N- methoxy methyls acylamino-) benzene
At least one of sulfohydrazide.
Preferably, the stabilizer is mixed by silica and calcium silicates, and the silica or calcium silicates exist
Mass fraction in the oil-well cement gas expansion agent is 10~60%, i.e., when stabilizer uses two kinds of silica and calcium silicates
When component mixes, the minimum content of each component is not less than the 10% of swelling agent total content, and highest content is no more than swelling agent
The 60% of total content.
It is highly preferred that the stabilizer is mixed by silica and calcium silicates, and the two weight ratio is 3:4.This ratio
The stabilizer application that the silica and calcium silicates of example are configured to is most wide, and makes the micro-bubble of generation equal in cement mortar
Even distribution.
The oil-well cement gas expansion agent preparation method is simple, i.e., foaming agent and stabilizer is mixed into milling by a certain percentage
It is prepared.
The oil-well cement gas expansion agent can be not only used for daily dry-mixed operation, can be used for situ wet and mixes up industry, has
There is good expansion effect.
Oil-well cement gas expansion agent dosage in cement mortar is that 0.2wt%~0.4wt% can reach expansion effect,
That is normal pressure cubical expansivity reaches 5%~25%.
The oil-well cement gas expansion agent and cement mixing are uniform, under alkalescence condition temperature more than 35 DEG C when start to discharge
Nitrogen, micro-bubble can be made to be evenly distributed in cement mortar by the effect of stabilizer, caused nitrogen does not corrode tubing；With
Other cement additive compatibilities are good, do not influence the performance of other cement additives and the combination property of cement mortar, that is, have
Preferable compatibility.
Compared with prior art, the oil-well cement gas expansion agent can be not only used for daily dry-mixed operation, can be used for existing
Field wet mixing operation；It starts to discharge nitrogen with cement mixing when temperature reaches 35 DEG C in the basic conditions, by stable in component
The effect of agent can be such that micro-bubble is evenly distributed in cement mortar, and it is only nitrogen to produce gas, does not corrode tubing；In addition,
The oil-well cement gas expansion agent and other cement additive compatibilities are good, have preferable compatibility with other cement additives
Property；And can effective compensation cement slurry sets when the pressure loss and volume contraction, prevent cement the well oil gas water breakthrough.
Embodiment
The oil-well cement gas expansion agent to the present invention is described in detail below in conjunction with the accompanying drawings, but not only office of the invention
It is limited to following examples.
Embodiment 1
30 parts of benzene sulfonyl hydrazides and 70 parts of silica millings are mixed with and formed.
Embodiment 2
30 parts of benzene sulfonyl hydrazides, 30 parts of silica and 40 parts of calcium silicates millings are mixed with and formed.
Embodiment 3
By 20 parts of benzene sulfonyl hydrazides, 15 parts to (N- methoxy methyls acylamino-) benzene sulfonyl hydrazide, 30 parts of silica and 40 parts of silicon
Sour calcium milling, which is mixed with, to be formed.
Embodiment 4
By 20 parts of benzene sulfonyl hydrazides, 20 parts to (N- methoxy methyls acylamino-) benzene sulfonyl hydrazide and 70 parts of silica milling mixing
It is prepared.
Performance test：
According to oil-well cement gas expansion agent of the standard SY/T 5504.8-2013 to the application carried out dilatancy experiment,
Compressive strength test and with the compatibility of dispersant and fluid loss agent test.
Cement mortar preparation method used in items experiment：The oil well prepared by 800g Tianshan Mountains G class g cements and embodiment 4
The agent of cement gas expansion is uniformly blended into 336g fresh water using oil-well cement gas expansion agent and (wherein, oil well water is prepared
Addition of the mud gas expansion agent in cement is 0.2~0.4wt%).
(1) dilatancy is tested
The cement mortar prepared is subjected to dilatancy experiment under the conditions of 35 DEG C, 65 DEG C and 95 DEG C respectively, result of the test is shown in
Table 1.
Table 1：Dilatancy experimental test result
As can be seen from Table 1,35 DEG C when, cement just start produce slight expansion, as the rise of temperature, expansion rate are gradual
Increase, when temperature reaches 95 DEG C, cement and expanded rate is up to 25.6% after 180min, or even in the case where being pressurized to 5MPa,
Still there is 2.5% expansion rate after 360min.
(2) compressive strength test
The cement mortar prepared is subjected to compressive strength test under the conditions of 95 DEG C, experimental test result is shown in Table 2.Table 2:It is anti-
Compressive Strength experimental test result
| Experimental condition | Swelling agent dosage | Compression strength/MPa |
| % | 24h | 48h | |
| 95℃、0.1MPa | 0.2 | 13.2 | 14.6 |
| 95℃、5.0MPa | 0.2 | 20.1 | 22.3 |
| 95℃、21.0MPa | 0.2 | 23.3 | 25.1 |
| 95℃、0.1MPa | 0.3 | 12.2 | 13.2 |
| 95℃、5.0MPa | 0.3 | 19.9 | 21.8 |
| 95℃、21.0MPa | 0.3 | 22.1 | 25.2 |
| 95℃、0.1MPa | 0.4 | 10.2 | 10.8 |
| 95℃、5.0MPa | 0.4 | 19.6 | 21.5 |
| 95℃、21.0MPa | 0.4 | 21.3 | 24.4 |
As can be seen from Table 2, under the conditions of ordinary pressure curing, expanding cement is because expansion rate is excessive, and compression strength is relatively
It is low, but as maintenance pressure rise, compression strength gradually increase, meet needs of cementing operations.
(3) compatibility is tested
Oil well cement swelling agent is typically seldom used alone, usually with the compounding use such as fluid loss agent and dispersant.Therefore
It is necessary to carry out compatibility experiment respectively to oil well cement swelling agent in the present invention and common dispersants and fluid loss agent.
Wherein, dispersant selects naphthalene sulfonic acid-formaldehyde condensation product class dispersant and poly styrene sulfonate class dispersant；Drop is lost
Aqua selects film-forming type fluid loss agent polyvinyl alcohol (PVA) and copolymer analog fluid loss agent 2- acrylamide-2-methyl propane sulfonics
(AMPS).The oil well cement swelling agent and common dispersants and the compatibility experimental test result such as table 3 of fluid loss agent and the institute of table 4
Show.
Table 3：Dispersant compatibility experimental test result
Table 4：Fluid loss agent compatibility experimental test result
By table 3 and table 4 it can be seen that when addition be 0.2~0.4wt% to the oil well cement swelling agent in cement and
And cement additive the oil well cement swelling agent is added without, unobvious can be influenceed on slurry flowing performance-changing and filtrate-loss control, i.e.,
With good compatibility, needs of cementing operations disclosure satisfy that.
Claims (3)
1. a kind of oil-well cement gas expansion agent, it is characterised in that by the foaming agent and 60~70 parts by weight of 30~40 parts by weight
Stabilizer form, the foaming agent be sulfonyl hydrazines compound, and the stabilizer is at least one in silica, calcium silicates
Kind；Wherein, the foaming agent is to (N- methoxy methyls acylamino-) benzene sulfonyl hydrazide, benzene sulfonyl hydrazide, 3,3- disulfonyl hydrazide diphenyl sulphone (DPS)s
At least one of.
2. oil-well cement gas expansion agent according to claim 1, it is characterised in that the stabilizer by silica and
Calcium silicates mixes, and the mass fraction of the silica or calcium silicates in the stabilizer is 10%~60%.
A kind of 3. preparation method of oil-well cement gas expansion agent according to claim 2, it is characterised in that the stabilization
Agent is mixed by silica and calcium silicates, and the two weight ratio is 3:4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510112506.6A CN104818007B (en) | 2015-03-13 | 2015-03-13 | Oil-well cement gas expansion agent |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510112506.6A CN104818007B (en) | 2015-03-13 | 2015-03-13 | Oil-well cement gas expansion agent |
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| CN104818007A CN104818007A (en) | 2015-08-05 |
| CN104818007B true CN104818007B (en) | 2017-11-14 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107760288A (en) * | 2016-08-19 | 2018-03-06 | 中国石油天然气集团公司 | Gas expansion agent and its application are used in the well cementation of high temperature well |
| CN107140865A (en) * | 2017-06-30 | 2017-09-08 | 四川宏升石油技术开发有限责任公司 | A kind of preparation method of oil well cement swelling agent |
| CN107188449A (en) * | 2017-06-30 | 2017-09-22 | 四川宏升石油技术开发有限责任公司 | The swelling agent with high intensity for oil-well cement |
| CN108059401A (en) * | 2018-01-26 | 2018-05-22 | 毕言铎 | A kind of low-density oil-well cement |
| CN109943304B (en) * | 2019-04-16 | 2021-06-18 | 中国石油天然气集团有限公司 | Oil well cement coagulation accelerating early strength agent and preparation method and application thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4896724A (en) * | 1986-07-30 | 1990-01-30 | Mobil Oil Corporation | Method for suspending wells |
| US6858566B1 (en) * | 2002-05-31 | 2005-02-22 | Halliburton Energy Services, Inc. | Methods of generating gas in and foaming well cement compositions |
-
2015
- 2015-03-13 CN CN201510112506.6A patent/CN104818007B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4896724A (en) * | 1986-07-30 | 1990-01-30 | Mobil Oil Corporation | Method for suspending wells |
| US6858566B1 (en) * | 2002-05-31 | 2005-02-22 | Halliburton Energy Services, Inc. | Methods of generating gas in and foaming well cement compositions |
Non-Patent Citations (2)
| Title |
|---|
| 发泡剂OBSH;顾培基;《上海化工》;19940430(第02期);34-35 * |
| 海绵橡胶有机发泡剂研究进展;田万辉;《橡塑资源利用》;20090628(第03期);32-36、40 * |
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Effective date of registration: 20210825 Address after: 100007 No. 9 North Main Street, Dongcheng District, Beijing, Dongzhimen Patentee after: CHINA NATIONAL PETROLEUM Corp. Patentee after: CNPC Bohai Drilling Engineering Co.,Ltd. Address before: 300457 Tianjin Binhai New Area Development Zone Huanghai Road 106 Bohai Drilling Engineering Co., Ltd. science and Technology Development Office Patentee before: CNPC Bohai Drilling Engineering Co.,Ltd. |