CN102719232B - Bridging particle for shallow casing blind hole - Google Patents
Bridging particle for shallow casing blind hole Download PDFInfo
- Publication number
- CN102719232B CN102719232B CN201210203336.9A CN201210203336A CN102719232B CN 102719232 B CN102719232 B CN 102719232B CN 201210203336 A CN201210203336 A CN 201210203336A CN 102719232 B CN102719232 B CN 102719232B
- Authority
- CN
- China
- Prior art keywords
- blind hole
- plugging agent
- shallow
- water
- casing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Abstract
The invention discloses a bridging particle for a shallow casing blind hole. The bridging particle is suitable for the leakage stoppage of a shallow casing blind hole in an oil field, and comprises 1 to 3% of nano-zirconia, 10 to 20% of silica micropowder, 10 to 15% of light calcium carbonate, 25 to 40% of superfine cement, 0.2 to 2% of glass fiber, 1 to 2% of drag reducer, 0.5 to 2% of early strength agent and 30 to 45% of water. The slurry of the bridging particle has good thixotropy; the multiviscosity time is adjustable; the strength is high and the volume does not shrink after solidification; and no micro-cracks are generated. The invention can effectively solve technical problems of oil field leakage stoppage, such as severe casing leakage after a casing of an oil-water well is corroded and holed, while improving construction safety.
Description
Technical field
The present invention relates to oilfield chemical technology field, particularly relate to a kind of shallow-layer cased perforated absorption well plugging agent.
Background technology
At present, the conventional high strength chemistry plugging agent in oil field is oil well cement or superfine cement both at home and abroad, its generally for Water in Water Shutoff in Oil Field, stifled alter, the aspect such as leak stopping, rig-site utilization shows, though oil well cement or superfine cement intensity are high, but after solidifying, volume can shrink, and can produce microfracture, leak stopping success ratio is lower, and because the thickening time of oil well cement and superfine cement is shorter, there is certain construction risk, be difficult to solve the cover leakage problem that Casing Failure corrosion failure causes.
Summary of the invention
The plugging agent that after the object of the present invention is to provide a kind of intensity high, curing, volume does not shrink, the thickening time is adjustable.
A cover blind hole plugging agent, this plugging agent is comprised of the raw material of following each component weight percent: nano zircite 1-3%, silicon powder 10-20%, light calcium carbonate 10-15%, the glass fibre of ultra tiny cement 25-40%, 0.2-2%, flow improver 1-2%, hardening accelerator 0.5-2%, water 30-45%.
The preferred technical scheme of the present invention is as follows: this plugging agent is comprised of the raw material of following each component weight percent: nano zircite 1-2%, silicon powder 15-20%, light calcium carbonate 12-15%, the glass fibre of ultra tiny cement 25-30%, 0.5-2%, flow improver 1-1.5%, hardening accelerator 0.5-1%, water 35-40%.
Described flow improver is iron complex salt.
Described hardening accelerator is calcium formiate.
The nano zircite that this plugging agent adds, has strengthened the thixotropy of plugging agent slurries, and with ultra tiny cement, a hydration reaction occurs, and generates to take the three-dimensional net structure cured body that nano zircite is core; The silicon powder adding can cause secondary reaction of hydration, fills hydration reaction Hou microporosity one time, makes plugging agent solidify rear volume and does not shrink; The light calcium carbonate adding can participate in once and secondary reaction of hydration, makes the microtexture of cured body finer and close, and has improved its ultimate compression strength; The glass fibre adding can increase its toughness, does not produce microfracture after plugging agent is solidified; The iron complex salt adding can improve the mobility of plugging agent slurries; The calcium formiate adding can be accelerated hydration reaction, improves plugging agent early strength, prevents that plugging agent is at formation leakage in debt.
This plugging agent slurry thixotropy is good, and the high and volume of cured strength does not shrink, and does not produce microfracture, can effectively solve Casing Failure corrosion failure after cover leak serious grade for an oil field leakage stopping technology difficult problem, because its thickening time can regulate, improved the security of constructing.Compare with oil well cement, superfine cement hydration and sclerosis body, this plugging agent not only has the feature that intensity is high, and curing volume do not shrink, and does not produce microfracture.
Embodiment
Below in conjunction with specific embodiment, be further described.
Embodiment 1:
A cover blind hole plugging agent, its technical scheme concrete steps are as follows:
Take 40g water, under agitation add 0.5g iron complex salt, after all dissolving, under high-speed stirring, slowly add the materials such as 2g nano zircite, 17g silicon powder, 13g light calcium carbonate, the ultra tiny cement of 26g, 0.5g glass fibre, after stirring, continue to add while stirring 1g calcium formiate until mix, get slurries and put into thermostatic container and mould, in the rearmounted 60 ℃ of waters bath with thermostatic control of sealing, isothermal curing is 48 hours, takes out cured body by core flow test requirement core-drilling and to measure its breakthrough pressure be 1.0MPa/cm; Take out the cured body in mould, with even loading pressure testing machine, measuring its ultimate compression strength is 29.3MPa; The above-mentioned slurries that prepare are poured in tool plug graduated cylinder, recorded slurry volume, put into 60 ℃ of water bath with thermostatic control isothermal curings 48 hours after sealing, take out the volume of observing cured body, volume calculated shrinking percentage is 0.
Embodiment 2:
A cover blind hole plugging agent, its technical scheme concrete steps are as follows:
Take 37g water, under agitation add 1g iron complex salt, after all dissolving, under high-speed stirring, slowly add the materials such as 1.5g nano zircite, 18g silicon powder, 14g light calcium carbonate, the ultra tiny cement of 27g, 1g glass fibre, after stirring, continue to add while stirring 0.5g calcium formiate until mix, get slurries and put into thermostatic container and mould, in the rearmounted 60 ℃ of waters bath with thermostatic control of sealing, isothermal curing is 48 hours, takes out cured body by core flow test requirement core-drilling and to measure its breakthrough pressure be 1.3MPa/cm; Take out the cured body in mould, with even loading pressure testing machine, measuring its ultimate compression strength is 31.5MPa; The above-mentioned slurries that prepare are poured in tool plug graduated cylinder, recorded slurry volume, put into 60 ℃ of water bath with thermostatic control isothermal curings 48 hours after sealing, take out the volume of observing cured body, volume calculated shrinking percentage is 0.
Embodiment 3
A cover blind hole plugging agent, its technical scheme concrete steps are as follows:
Take 35g water, under agitation add 1g iron complex salt, after all dissolving, under high-speed stirring, slowly add the materials such as 1g nano zircite, 19g silicon powder, 15g light calcium carbonate, the ultra tiny cement of 28g, 0.5g glass fibre, after stirring, continue to add while stirring 0.5g calcium formiate until mix, get slurries and put into thermostatic container and mould, in the rearmounted 60 ℃ of waters bath with thermostatic control of sealing, isothermal curing is 48 hours, takes out cured body by core flow test requirement core-drilling and to measure its breakthrough pressure be 1.2MPa/cm; Take out the cured body in mould, with even loading pressure testing machine, measuring its ultimate compression strength is 30.8MPa; The above-mentioned slurries that prepare are poured in tool plug graduated cylinder, recorded slurry volume, put into 60 ℃ of water bath with thermostatic control isothermal curings 48 hours after sealing, take out the volume of observing cured body, volume calculated shrinking percentage is 0.
On-the-spot allocation method: first, calculate the total amount of required plugging agent according to corresponding layer thickness, porosity and the blocking radius etc. of sleeve pipe leak source of intending enforcement plugging operations well, then calculate the consumption of required each component in aforementioned formula ratio.During dosing, first the water of calculated amount is added to the 5m with electric mixing device
3in dosing pond, start stirrer, under agitation condition, add respectively the iron complex salt of calculated amount, after all dissolving, under high-speed stirring, slowly alternately add the nano zircite of calculated amount, silicon powder, light calcium carbonate, ultra tiny cement, the materials such as glass fibre, after stirring, continue to add while stirring the calcium formiate of calculated amount until mix, then with 400 type cementing trucks or 700 type fracturing trucks by liquid with slurry clamp-on the leak position of intending leak stopping well, after anti-flushing well, suppress closing well reaction 48 hours, after boring plug pressure testing, by flow string under production requirement, resume production.
Claims (2)
1. a shallow-layer cover blind hole plugging agent, is characterized in that: this plugging agent is comprised of the raw material of following each component weight percent: nano zircite 1-3%, silicon powder 10-20%, light calcium carbonate 10-15%, the glass fibre of ultra tiny cement 25-40%, 0.2-2%, iron complex salt 1-2%, calcium formiate 0.5-2%, water 30-45%.
2. a kind of shallow-layer cover blind hole plugging agent according to claim 1, is characterized in that: this plugging agent is comprised of the raw material of following each component weight percent: nano zircite 1-2%, silicon powder 15-20%, light calcium carbonate 12-15%, the glass fibre of ultra tiny cement 25-30%, 0.5-2%, iron complex salt 1-1.5%, calcium formiate 0.5-1%, water 35-40%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210203336.9A CN102719232B (en) | 2012-06-15 | 2012-06-15 | Bridging particle for shallow casing blind hole |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210203336.9A CN102719232B (en) | 2012-06-15 | 2012-06-15 | Bridging particle for shallow casing blind hole |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102719232A CN102719232A (en) | 2012-10-10 |
| CN102719232B true CN102719232B (en) | 2014-01-15 |
Family
ID=46945110
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210203336.9A Active CN102719232B (en) | 2012-06-15 | 2012-06-15 | Bridging particle for shallow casing blind hole |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102719232B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103965847B (en) * | 2013-01-30 | 2016-06-08 | 中国石油天然气股份有限公司 | Can the anti-leakage plugging agent of consolidation |
| CN103740346B (en) * | 2013-12-31 | 2016-02-24 | 东营泰尔石油技术有限公司 | Leak stopping toughner |
| CN103773340B (en) * | 2013-12-31 | 2016-02-24 | 东营泰尔石油技术有限公司 | High strength consolidation type plugging agent |
| CN107722955A (en) * | 2017-09-27 | 2018-02-23 | 克拉玛依市红都有限责任公司 | Outer seal stoppage agent of variable density pipe and preparation method thereof |
| CN110105934A (en) * | 2019-04-19 | 2019-08-09 | 河南省遨太化工有限公司 | A kind of drilling fluid acid-soluble pressurization sealing agent and preparation method |
| CN110272725B (en) * | 2019-07-09 | 2021-09-28 | 中国石油天然气股份有限公司 | Acid-soluble plugging agent for staged fracturing of sidetracking slim hole and preparation method thereof |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1778751A (en) * | 2004-11-23 | 2006-05-31 | 新疆石油管理局钻井工艺研究院 | Thixotropic early enhanced low density cement slurry |
-
2012
- 2012-06-15 CN CN201210203336.9A patent/CN102719232B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN102719232A (en) | 2012-10-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102719232B (en) | Bridging particle for shallow casing blind hole | |
| CN101353571B (en) | Oil and water well slag plugging agent | |
| CN103540301B (en) | Selfreparing latex cementing slurry and preparation and application thereof | |
| CN102690639B (en) | Outside casing channeling-blocking agent | |
| CN104402350B (en) | Earth building material modification method and the method that building block is prepared using the modified raw-soil | |
| CN107311591A (en) | A kind of new grouting material and preparation method thereof | |
| CN111170682A (en) | Self-filling concrete for railway tunnel lining | |
| CN103342527B (en) | Waste concrete reclaimed tunnel back lining grouting material and preparation method thereof | |
| CN103553541B (en) | Pile bottom sediment curing agent | |
| CN104446227A (en) | Concrete with high fire resistance | |
| CN107663445A (en) | A kind of sealing skill pressure sensitive chemical sealing agent | |
| CN110819321B (en) | Curing plugging agent, preparation method thereof and plugging slurry | |
| CN103011758A (en) | High-strength red mud concrete and industrial production method and application thereof | |
| CN103864381A (en) | Cement-based inorganic anchor adhesive and preparation method thereof | |
| CN108395126B (en) | Anti-seepage leak-stopping material and application thereof in hydraulic engineering | |
| CN106753294A (en) | A kind of leak-stopping cement mortar | |
| CN108424086A (en) | A kind of anchoring explosion sealing material and preparation method thereof | |
| CN105602536B (en) | A kind of non-acid-soluble high intensity seal stoppage agent and preparation method thereof | |
| CN100556979C (en) | A kind of self-cementing chemical leak-stopping agent for drilling and preparation method thereof | |
| CN106747130B (en) | A kind of high temperature resistant oil well sealing agent | |
| CN100345932C (en) | Cement permeation promoter for oil and gas well | |
| CN1323220C (en) | High strength and readily soluble nano water shutoff agent | |
| CN103373843A (en) | Slag-based solidified soil and preparation method thereof | |
| CN101508890B (en) | Dual-purpose agglutination sand for oil-field development | |
| KR20130063381A (en) | Composition for ground hardening and ground mortar including the same |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |