CN103436242B - Automatic restoration agent of well-cementing cement rings of rare-earth coordination type oil-gas well, as well as preparation and application of automatic restoration agent - Google Patents
Automatic restoration agent of well-cementing cement rings of rare-earth coordination type oil-gas well, as well as preparation and application of automatic restoration agent Download PDFInfo
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- CN103436242B CN103436242B CN201310379303.4A CN201310379303A CN103436242B CN 103436242 B CN103436242 B CN 103436242B CN 201310379303 A CN201310379303 A CN 201310379303A CN 103436242 B CN103436242 B CN 103436242B
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Abstract
The invention discloses an automatic restoration agent of well-cementing cement rings of a rare-earth coordination type oil-gas well. The automatic restoration agent comprises the following components in parts by weight: 100-130 parts of active mineral and 2.0-8.0 parts of a rare-earth coordination type surface treatment agent, wherein the active mineral is mineral slag, pulverized fuel ash, cement or coal gangue; an inorganic powder multifunctional surface modification agent WOT102 or WOT108 is adopted as the rare-earth coordination type surface treatment agent. The invention also provides a method and an application of the automatic restoration agent of well-cementing cement rings of the rare-earth coordination type oil-gas well. According to the invention, the coating treatment is carried out on the surface of the active mineral by the rare-earth coordination type surface treatment agent and a waterproof protective layer is formed on the surfaces of the active mineral particles, so that the active material is converted from the dominant activity to potential activity; the automatic restoration agent can start hydration reaction when the cement rings are damaged, and formed hydration products can restore damaged parts, so that the automatic restoration of the well-cementing cement rings is realized and the significance for guaranteeing the service life and the mining safety of the oil-gas well is great.
Description
Technical field
The invention belongs to petroleum drilling cementing technology field, particularly a kind of rare earth coordination type oil gas well cementing operation cement mantle self repairing agent and Synthesis and applications thereof.
Background technology
Oil gas well cementing operation cement mantle is the same with architectural cement-based material is a kind of hard brittle material of easy contraction, add various well testing, test, go into operation, the impact of production operation and formation condition, sleeve pipe and cement mantle is made to be subject to temperature, the various acidic fluid of the impact that the various factorss such as pressure significantly change and down-hole is (as carbonic acid gas, hydrogen sulfide etc.) corrosion, inevitably produce microfracture in cement mantle inside, microgap is produced at the cementation interface of cementing concrete ring and the stratum borehole wall, or cement mantle porosity is increased, oil gas well cementing operation cement mantle is caused to damage.
Oil gas well cementing operation cement mantle is once damage; will produce its packing performance and destroy; form the fluid-channeling channel of formation fluid downhole; cause the inefficacy of Inter-zonal packing inefficacy and casing protection function, cause a series of serious development problems such as sand string infringement, the moisture rising of Oil/gas Well, thermal recovery well gas blowby and underground oil and gas water distribution are chaotic, destruction hydrocarbon zone, underground Sweet natural gas and release of toxic gas.
The basic skills solving oil gas well cementing operation cement mantle damage problem is the large well workover restorative procedure of squeeze method and the chemical plugging restorative procedure that adopt cost intensive, but success ratio is low, the repair of many damage wells needs to carry out 2-3 time, some wells just have an accident in construction process, Oil/gas Well after reparation often may go wrong again within very short time, needs again to repair.The large well workover fund that annual each oil field is dropped into reaches billions of unit.
Guangdong Weilinna Function Materials Co., Ltd develops inorganic powder multifunction surface properties-correcting agent WOT, it is a kind of corrdination type inorganic powder surface treatment agent, for the treatment of inorganic powders such as calcium carbonate, Calucium Silicate powder, barium sulfate, polynite, magnesium hydroxide, aluminium hydroxide, micas, inorganic powder can be improved in the wetting property of the polymer matrixs such as polyolefine and dispersiveness, increase the bonding force of inorganic powder and matrix resin, improve the physical and mechanical properties, particularly shock resistance of inorganic powder/superpolymer compound system.WOT can also improve the rheological property of inorganic powder/superpolymer compound system simultaneously, improves article gloss, also has effect of crystal formation modification agent, particularly shock resistance in polypropylene-base material.To sum up, can find out, WOT generally only uses as composite treating agent.
Summary of the invention
In order to overcome the shortcoming of above-mentioned prior art, the object of the present invention is to provide a kind of rare earth coordination type oil gas well cementing operation cement mantle self repairing agent and Synthesis and applications thereof, this self repairing agent is added in cementing fluid as a kind of material of well cementing mortar architecture, solidify together with the materials such as oil well cement and form cementing concrete ring, under normal circumstances, self repairing agent does not participate in the hydration reaction of cementing slurry, and once the raw damage of cementing concrete environment-development, self repairing agent can activate activity itself, by hydration reaction, damage location is repaired automatically, thus avoid or reduce expensive workover treatment, ensure weather resistance and the stoping safety of Oil/gas Well, it is good to have with cementing slurry amalgamation, effective to cementing concrete ring damage (microfracture and microgap) selfreparing, low cost of manufacture, feature free from environmental pollution.
To achieve these goals, the technical solution used in the present invention is:
A kind of rare earth coordination type oil gas well cementing operation cement mantle self repairing agent, is made up of the active mineral of 100-130 weight part and the rare earth coordination type surface treatment agent of 2.0-8.0 weight part.
Described active mineral is slag, flyash, cement or coal gangue.
Described cement is Portland cement or oil well cement.
Described rare earth coordination type surface treatment agent is inorganic powder multifunction surface properties-correcting agent WOT102 or WOT108.
Present invention also offers the method preparing described rare earth coordination type oil gas well cementing operation cement mantle self repairing agent, comprise the steps:
Step one, puddles evenly by the rare earth coordination type surface treatment agent of 2.0-8.0 weight part and the active mineral of 100-130 weight part, then heats to 90 DEG C, insulation 20-40min;
Step 2, by the mixture after heating in grinder-mixer, rotating speed 1000-10000 rev/min of lower crushing, stirring 10-40min;
Step 3, by the mixture after step 2 crushing, stirring, heats to 130 DEG C, insulation 20-40min;
Step 4, by the mixture after step 3 heating in grinder-mixer, rotating speed 1000-10000 rev/min of lower crushing, stirring 10-40min.
Described self repairing agent can be used for the selfreparing of oil gas well cementing operation cement mantle, when preparing cementing slurry, described self repairing agent is added in well cementing mortar architecture according to the ratio of the 5-25% of oil well cement amount, feed postition first described self repairing agent and oil well cement is carried out pre-mixing, then be mixed with cementing slurry by grout compounding system, cementing slurry injects sealing well section after coagulation and forms cementing concrete ring.
Compared with prior art, the present invention carries out coated process by rare earth coordination type surface treatment agent to active mineral surface, forms fish tail and waterproof layer, make active material change lateral reactivity into by dominant activity at active mineral particle surface.After rare earth coordination type self repairing agent adds well cementing mortar architecture, when damage occurs cement mantle, hydration reaction can be started, form hydrated product and repair damage location, realize the automatic reparation of cementing concrete ring, significant to the work-ing life and stoping safety ensureing Oil/gas Well.
Embodiment
Embodiments of the present invention are described in detail below in conjunction with embodiment.
Embodiment one
A kind of rare earth coordination type oil gas well cementing operation cement mantle self repairing agent, include: rare earth coordination type surface treatment agent WOT, active mineral material, its component (weight part) is:
100 parts, slag (source: Xinjiang Aug. 1st steel mill)
WOT-102(originates: Guangdong Weilinna Function Materials Co., Ltd) 6.0 parts
The preparation method of this self repairing agent comprises the steps:
The first, WOT-102 and active mineral are puddled evenly, be then warmed to 90 DEG C, keep temperature 30min;
The second, the mixture of heating is put into grinder-mixer, agitator speed 3000 revs/min, crushing, stirring 30min;
3rd, mixture step 2 obtained is warmed to 130 DEG C, keeps temperature 30min.
4th, the mixture that step 3 heats is put into grinder-mixer, agitator speed 3000 revs/min, crushing, stirring 30min.
Embodiment two
Oil well cement (source: magnificent G level oil well cement is praised in Sichuan) 100 parts
WOT-102(originates: Guangdong Weilinna Function Materials Co., Ltd) 6.0 parts
Embodiment three
100 parts, slag (source: Xinjiang Aug. 1st steel mill)
WOT-102(originates: Guangdong Weilinna Function Materials Co., Ltd) 3.0 parts
Embodiment four
100 parts, flyash (source: Xi'an power plant 2 type flyash)
WOT-102(originates: Guangdong Weilinna Function Materials Co., Ltd) 6.0 parts
Embodiment five
100 parts, flyash (source: Xi'an power plant 2 type flyash)
WOT-102(originates: Guangdong Weilinna Function Materials Co., Ltd) 3.0 parts
Embodiment six
100 parts, flyash (source: Xi'an power plant 2 type flyash)
WOT-108(originates: Guangdong Weilinna Function Materials Co., Ltd) 3.0 parts
Wherein, the preparation process of embodiment two-six is identical with embodiment one.
Above-mentioned self repairing agent can be used for the selfreparing of oil gas well cementing operation cement mantle, when preparing cementing slurry, self repairing agent is added in existing well cementing mortar architecture according to the ratio of the 5-25% of oil well cement amount, feed postition first described self repairing agent and oil well cement is carried out pre-mixing, is then mixed with cementing slurry by grout compounding system.
Principle of the present invention is: carry out coated with rare earth coordination type surface treatment agent to active material, thus forms waterproofing protection film in surface of active material, and the activity making the activity of active material become potential, does not participate in hydration reaction in well cementing mortar architecture.Only when its surface film occurs to destroy because of the damage of cementing concrete ring, just start hydration reaction, forming hydrated product repairs automatically to cement mantle damage location, can also improve the toughness reinforcing resistance to cleavage of cement mantle simultaneously.
Claims (5)
1. a rare earth coordination type oil gas well cementing operation cement mantle self repairing agent; it is characterized in that; be made up of the active mineral of 100-130 weight part and the rare earth coordination type surface treatment agent of 2.0-8.0 weight part; described rare earth coordination type surface treatment agent carries out coated to active mineral, forms waterproofing protection film on active mineral surface.
2. rare earth coordination type oil gas well cementing operation cement mantle self repairing agent according to claim 1, it is characterized in that, described active mineral is slag, flyash, cement or coal gangue.
3. rare earth coordination type oil gas well cementing operation cement mantle self repairing agent according to claim 2, it is characterized in that, described cement is Portland cement or oil well cement.
4. prepare the method for rare earth coordination type oil gas well cementing operation cement mantle self repairing agent described in claim 1, comprise the steps:
Step one, puddles evenly by the rare earth coordination type surface treatment agent of 2.0-8.0 weight part and the active mineral of 100-130 weight part, then heats to 90 DEG C, insulation 20-40min;
Step 2, by the mixture after heating in grinder-mixer, rotating speed 1000-10000 rev/min of lower crushing, stirring 10-40min;
Step 3, by the mixture after step 2 crushing, stirring, heats to 130 DEG C, insulation 20-40min;
Step 4, by the mixture after step 3 heating in grinder-mixer, rotating speed 1000-10000 rev/min of lower crushing, stirring 10-40min.
5. the application of rare earth coordination type oil gas well cementing operation cement mantle self repairing agent according to claim 1, it is characterized in that, when preparing cementing slurry, described self repairing agent is added in well cementing mortar architecture according to the ratio of the 5-25% of oil well cement amount, feed postition first described self repairing agent and oil well cement is carried out pre-mixing, then be mixed with cementing slurry by grout compounding system, cementing slurry injects sealing well section after coagulation and forms cementing concrete ring.
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| CN201310379303.4A CN103436242B (en) | 2013-08-27 | 2013-08-27 | Automatic restoration agent of well-cementing cement rings of rare-earth coordination type oil-gas well, as well as preparation and application of automatic restoration agent |
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| CN201310379303.4A CN103436242B (en) | 2013-08-27 | 2013-08-27 | Automatic restoration agent of well-cementing cement rings of rare-earth coordination type oil-gas well, as well as preparation and application of automatic restoration agent |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107384342A (en) * | 2017-07-14 | 2017-11-24 | 中国石油天然气集团公司 | A kind of cementing slurry and its evaluation method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111560240B (en) * | 2020-07-16 | 2020-10-13 | 海塔石油科技有限公司 | Ultramicro-grade channeling and plugging agent as well as preparation method and application thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101792660A (en) * | 2010-03-04 | 2010-08-04 | 大庆石油管理局 | Multi-functional nanometer oil well cement slurry |
| CN101905962A (en) * | 2010-07-13 | 2010-12-08 | 石磊 | Modified inorganic powder composite material and preparation method thereof |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101792660A (en) * | 2010-03-04 | 2010-08-04 | 大庆石油管理局 | Multi-functional nanometer oil well cement slurry |
| CN101905962A (en) * | 2010-07-13 | 2010-12-08 | 石磊 | Modified inorganic powder composite material and preparation method thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107384342A (en) * | 2017-07-14 | 2017-11-24 | 中国石油天然气集团公司 | A kind of cementing slurry and its evaluation method |
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