CN102766443A - Hardener for mud cakes of drilling fluid - Google Patents
Hardener for mud cakes of drilling fluid Download PDFInfo
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- CN102766443A CN102766443A CN2012102612183A CN201210261218A CN102766443A CN 102766443 A CN102766443 A CN 102766443A CN 2012102612183 A CN2012102612183 A CN 2012102612183A CN 201210261218 A CN201210261218 A CN 201210261218A CN 102766443 A CN102766443 A CN 102766443A
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- drilling fluid
- mud cake
- hardener
- agent
- mud
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- Soil Conditioners And Soil-Stabilizing Materials (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention relates to a hardener for mud cakes of drilling fluid. The invention solves the existing problems in prior arts including high contents of activator components and changes of drilling fluid properties caused by the activators, which can influence construction requirements. The hardener is characterized in that the hardener comprises the following components in percentage by weight: 50-90% of micron-sized silicon dioxide hydrate, 5-30% of dispersing agent, 2-20% of retarding agent and 1-5% of flow pattern modifier. The hardener for mud cakes of drilling fluid has the characteristics of less dosage and no influence to the drilling fluid properties, takes effects only in the interface of water and mud, and can meet the construction requirements.
Description
Technical field
The present invention relates to a kind of drilling fluid additive that use in the petroleum drilling engineering field, especially
OnePlant drilling fluid mud cake stiffening agent.
Background technology
The petroleum drilling engineering field for improving cementing quality, needs mud cake is handled, and makes mud cake sclerosis itself.Because mud cake and two material uncompatibilities of cementing concrete; For guaranteeing well cementation second interface sealing quality, to use rotational flow generator mud cake is carried out scraping, rotational flow generator is merely able to scrape away the part false filter cake of the borehole wall; Therefore, well cementation interface sealing quality fundamentally is not resolved.Relevant mud cake method for curing; The adding blast-furnace slag is arranged, and then add the report of acvator curing aspect, but these slags must just produce effect under the very big activator component content of adding; Acvator has changed the performance of drilling fluid simultaneously, can not satisfy the requirement of construction.
Summary of the invention
The invention reside in that acvator has changed the problem of the performance impact construction requirement of drilling fluid when overcoming the adding activator component content Datong District that exists in the background technology, and provide
OnePlant drilling fluid mud cake stiffening agent.This drilling fluid mud cake stiffening agent, it is few to have a dosage, does not influence property of drilling fluid, only just has an effect at cement interface, can satisfy construction requirement.
The present invention solves its problem and can reach through following technical scheme: this drilling fluid mud cake stiffening agent, its component and proportioning are following by weight percentage: micron-sized hydrated SiO 2 50-90%, dispersion agent 5-30%, retardant 2-20%, flow pattern improving agent 1-5%.
The size range of described hydrated SiO 2 is the 10-100 micron.
Described dispersion agent is the sulfonation potassium humate; Retardant is a potassium tannate; The flow pattern improving agent is an amphiprotic/amphoteric polymers.
Described amphiprotic/amphoteric polymers is FA367.
The prescription of this agent uses micron material and other subsidiary material; Be added in the middle of the well finishing liquid; And constituted the structure of mud cake with other solid phase material, when mud cake contacted with grout, it is inner and form calcium silicate hydrate with central micron silicon that the calcium ion in the middle of the grout is diffused into mud cake with filtrating; Changed the intensity and the hardness of mud cake, made the structure of mud cake change chemical structure into by original contact.
FA367 is a kind of amphoteric ion polymer; It is the high molecular weight water soluble polymer that is formed by multiple nonionic, negatively charged ion, cationic monomer copolymerization; In drilling fluid, mainly play a part to suppress to disperse, increase the drilling fluid viscosity and reduce filter loss; Having strong rejection capability and the good slurry performance of joining, can effectively solve the problem of drilling fluid poor stability, is one of organic viscosity increaser commonly used in the drilling well.So-called stiffening agent is meant through in mud, adding specific material and after mud cake forms, plays the chemical compsn that the change filter cake texture reaches sclerization.So-called sclerosis mud cake is meant in the drilling completion process, and first interface of well cementation and mud cake structure after well cementation of second contact surface formation are changed, and forms than the higher structure and the treating processes of hardness.
The present invention and above-mentioned background compared with techniques can have following beneficial effect: this drilling fluid mud cake stiffening agent; Requirement is drifting after the finishing drilling electrical measurement joins drilling fluid according to the ratio of weightmeasurement ratio 1%-5% in the middle of; It is few to have dosage; Only just have an effect, do not influence property of drilling fluid, can satisfy construction requirement at cement interface; The factor of merit is compared with conventional well, has improved 25 percentage points.
Embodiment:
To be described further the present invention below in conjunction with embodiment:
The used stiffening agent of the embodiment of the invention is to be main body by micron-sized hydrated SiO 2, is equipped with dispersion agent, retardant and flow pattern regulator.The component of stiffening agent is: the size range of hydrated SiO 2 is the 10-100 micron, content 50-90%; Dispersion agent is the sulfonation potassium humate, content 5-30%; Retardant is a potassium tannate, and content is 2-20%; The flow pattern improving agent is amphiprotic/amphoteric polymers FA367, content 1-5%.
Embodiment 1
Hydrated SiO 2 90 g, dispersion agent 5 g, retardant 2 g, flow pattern improving agent 3 g that take by weighing the 10-100 micron are hybridly prepared into drilling fluid mud cake stiffening agent.
Embodiment 2
Hydrated SiO 2 50 g, dispersion agent 30 g, retardant 15 g, flow pattern improving agent 5 g that take by weighing the 10-100 micron are hybridly prepared into drilling fluid mud cake stiffening agent.
Embodiment 3
Hydrated SiO 2 40 g, dispersion agent 25 g, retardant 20 g, flow pattern improving agent 5 g that take by weighing the 10-100 micron are hybridly prepared into drilling fluid mud cake stiffening agent.
Embodiment 4
Hydrated SiO 2 70 g, dispersion agent 20 g, retardant 9 g, flow pattern improving agent 1 g that take by weighing the 10-100 micron are hybridly prepared into drilling fluid mud cake stiffening agent.
Employed each component of embodiment is commercially available, and amphiprotic/amphoteric polymers is that the manufacturer of FA367 is the Yanggu north of the Changjiang River, a Shandong chemical industry ltd.
The stiffening agent of the foregoing description preparation is added in the drilling fluid system between in due course, and the performance of control drilling fluid is with the requirement that reaches drilling engineering and the requirement of casing and cementing.The present invention requires drifting after the finishing drilling electrical measurement joins drilling fluid according to the ratio of weightmeasurement ratio 1%-5% in the middle of, and fully circulates more than the week monitor fluid performance.
To above-mentioned drilling fluid mud cake stiffening agent, become well logging through sonic logging harmony and carry out recruitment evaluation, can estimate through 15 days time delay logging according to customer requirements.
Test in place situation: La5-PS3011Jing is high permeability formation adjustment well; Drilling fluid funnel viscosity after the completion logging 80 seconds; Through the adding thinner funnel viscosity was handled 55 seconds, added 1.5 tons of mud cake stiffening agents, the funnel viscosity of 3 week of circulation back measurement mud 48 seconds through the mud circulation ditch.Thereafter normal running casing, cementing operation, acoustic variable density log after 15 days judges that cementing quality is all-round excellent.
The oblique PS2906 well of loudspeaker 2-, the drilling fluid after the completion logging, funnel viscosity 60 seconds; Cutting ferrule takes place in the running casing construction runs affairs former; After the unfreezing, add 1.5 tons of mud cake stiffening agents while stirring, the funnel viscosity of one week of circulation back measurement mud 45 seconds through the mud tank charging opening.Carry out normal cementing operation, acoustic variable density log in 3 days, 15 days judges that cementing quality is all-round excellent.
Used 102 mouthful wells in BLOCK OF LAMADIAN OIL FIELD in June, 2011-September, and sound becomes the detection well cementation factor of merit 81%, qualification rate 100%.The factor of merit is compared with conventional well, has improved 25 percentage points.
Claims (4)
1.
OnePlant drilling fluid mud cake stiffening agent, its component and proportioning are following by weight percentage: micron-sized hydrated SiO 2 50-90%, dispersion agent 5-30%, retardant 2-20%, flow pattern improving agent 1-5%.
2. drilling fluid mud cake stiffening agent according to claim 1 is characterized in that: the size range of described hydrated SiO 2 is the 10-100 micron.
3. drilling fluid mud cake stiffening agent according to claim 1 is characterized in that: described dispersion agent is the sulfonation potassium humate; Retardant is a potassium tannate; The flow pattern improving agent is an amphiprotic/amphoteric polymers.
4. drilling fluid mud cake stiffening agent according to claim 3 is characterized in that: described amphiprotic/amphoteric polymers is FA367.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102612183A CN102766443B (en) | 2012-07-26 | 2012-07-26 | Hardener for mud cakes of drilling fluid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102612183A CN102766443B (en) | 2012-07-26 | 2012-07-26 | Hardener for mud cakes of drilling fluid |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102766443A true CN102766443A (en) | 2012-11-07 |
| CN102766443B CN102766443B (en) | 2013-12-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012102612183A Expired - Fee Related CN102766443B (en) | 2012-07-26 | 2012-07-26 | Hardener for mud cakes of drilling fluid |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107353884A (en) * | 2017-05-31 | 2017-11-17 | 中国石油天然气集团公司 | Interface affinity agent is used in the well cementation of horizontal well water-base drilling fluid |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1999037594A1 (en) * | 1998-01-26 | 1999-07-29 | Halliburton Energy Services, Inc. | Universal well cement additives and methods |
| CN1506436A (en) * | 2002-12-11 | 2004-06-23 | 大庆石油管理局 | Tough impact admixture for oil well cement |
| CN101260292A (en) * | 2008-04-16 | 2008-09-10 | 中国地质大学（武汉） | Coagulated cake forming agent and its preparing process and usage |
-
2012
- 2012-07-26 CN CN2012102612183A patent/CN102766443B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1999037594A1 (en) * | 1998-01-26 | 1999-07-29 | Halliburton Energy Services, Inc. | Universal well cement additives and methods |
| CN1506436A (en) * | 2002-12-11 | 2004-06-23 | 大庆石油管理局 | Tough impact admixture for oil well cement |
| CN101260292A (en) * | 2008-04-16 | 2008-09-10 | 中国地质大学（武汉） | Coagulated cake forming agent and its preparing process and usage |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107353884A (en) * | 2017-05-31 | 2017-11-17 | 中国石油天然气集团公司 | Interface affinity agent is used in the well cementation of horizontal well water-base drilling fluid |
| CN107353884B (en) * | 2017-05-31 | 2020-06-23 | 中国石油天然气集团公司 | Interfacial affinity agent for cementing of water-based drilling fluid of horizontal well |
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| Publication number | Publication date |
|---|---|
| CN102766443B (en) | 2013-12-11 |
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Granted publication date: 20131211 Termination date: 20170726 |
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