CN100582192C - Insulating liquid for injecting cement in oil well - Google Patents
Insulating liquid for injecting cement in oil well Download PDFInfo
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- CN100582192C CN100582192C CN 200610089273 CN200610089273A CN100582192C CN 100582192 C CN100582192 C CN 100582192C CN 200610089273 CN200610089273 CN 200610089273 CN 200610089273 A CN200610089273 A CN 200610089273A CN 100582192 C CN100582192 C CN 100582192C
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Abstract
The invention relates to an isolating liquid used in oil well cementing, comprising fresh water, suspension agent, thinner agent and aggravation agent. The invention is characterized in that: the suspension agent is made from hydroxy ethyl cellulose, carboxymethyl cellulose, xanthan and na-bentonite; the thinner agent is made from sodium lignosulphonate, sodium dodecyl benzene sulfonate and alkyl phenol polyoxyethylene ether; the aggravation agent is made from barite, fly ash, limestone and slag. When preparing the isolating liquid, the suspension agent is dissolved in water for one hour, thereafter thinner agent is added. Before cementing, the aggravation agent is added into the solution and mixed evenly. The isolating liquid is characterized by low viscosity, good rheological performance, slow critical velocity and being easy to form turbulent flow, so as to effectively substitute and wash mud, prevent forming mixed slurry of cement slurry and mud. Meanwhile, the invention can be compatible with ordinary cement slurry and mud system, thus diluting and improving cement slurry rheological performance.
Description
Technical field
The present invention relates to a kind of insulating liquid for injecting cement in oil well, can be used for separating mud and grout in the cementing operation, prevent that mud and grout are in contact with one another pollution.
Background technology
The early stage spacer pad that uses mainly is the solution that the well cementation admixture is prepared, and has good consistency with mortar architecture, but undesirable with the consistency of mud; In 80 year latter stage, the water glass separating liquid system is used in many oil fields, and this system is formed simple, have certain viscosity and suspension, but water glass has blood coagulation enhancing effect and undesirable with many mortar architecture consistencies to grout; Enter the nineties, along with the requirement to cementing quality is more and more higher, note more separating liquid system displacement characteristic, suspension characteristic, stabilising characteristic and with the consistency of contacting with fluid, the separating liquid system that can have different qualities and different densities at present according to mud and cement slurry density, characteristic design is to satisfy engineering characteristic.
Theoretical according to replacing, the general turbulent fluidised form of employing of recommending is the highest as the best fluidised form, the displacement efficiency that replace drilling fluid.But, in practice of construction,, be subjected to the restriction of field conditions such as pump ability because most separating liquid system viscosity that present stage uses are higher, be difficult to reach turbulence replacement.
Summary of the invention
The technical problem that the present invention solves: by preferred suspension agent and thinner, provide a kind of viscosity low, good stability, has lower critical flow velocity, be easy to realize the separating liquid system of turbulent flow, displacement and mud and the mud cake removed in the well effectively, the insulating liquid for injecting cement in oil well of raising displacement efficiency.
The scheme that the present invention is taked for the technical solution problem
Insulating liquid for injecting cement in oil well, it is characterized in that by adding 1～10 weight part suspension agent in the 100 weight part fresh water, 1～10 parts by weight diluent stirs under 4000rpm made mixing solutions in 60 seconds, dissolved 1 hour, be in 20 seconds, the weighting agent of 50～300 weight parts to be added in the above-mentioned dosing under the 4000rpm according to the density requirements low whipping speed then, continue then to stir 30 seconds, make spacer pad, wherein suspension agent is by 100 weight part sodium bentonites, the carboxymethyl cellulose of 4 weight part viscosity 6000mPa.s, the Natvosol of 1 weight part xanthan gum and 5 weight part viscosity 10000mPa.s is formed; Thinner is made up of 100 weight part sodium lignosulfonates, 30 weight part sodium laurylsulfonates and 50 weight part alkylphenol polyoxyethylene; Weighting agent is made up of 325 order barites, 10 weight part flyash, 800 order Wingdales of 10 weight parts and the 600 order slags of 50 weight parts of 100 weight parts.
Insulating liquid for injecting cement in oil well is characterized in that by 100 weight part fresh water, and 7 weight part suspension agents, 2 parts by weight diluent, 50 weight part weighting agents are formed; Wherein suspension agent is made up of the Natvosol of carboxymethyl cellulose, 1 weight part xanthan gum and the 5 weight part viscosity 10000mPa.s of 100 weight part sodium bentonites, 4 weight part viscosity 6000mPa.s; Thinner is made up of 100 weight part sodium lignosulfonates, 30 weight part sodium laurylsulfonates and 50 weight part alkylphenol polyoxyethylene; Weighting agent is made up of 325 order barites, 10 weight part flyash, 800 order Wingdales of 10 weight parts and the 600 order slags of 50 weight parts of 100 weight parts.
Insulating liquid for injecting cement in oil well is characterized in that by 100 weight part fresh water, and 5 weight part suspension agents, 4 parts by weight diluent, 100 weight part weighting agents are formed; Wherein suspension agent is made up of the Natvosol of carboxymethyl cellulose, 1 weight part xanthan gum and the 5 weight part viscosity 10000mPa.s of 100 weight part sodium bentonites, 4 weight part viscosity 6000mPa.s; Thinner is made up of 100 weight part sodium lignosulfonates, 30 weight part sodium laurylsulfonates and 50 weight part alkylphenol polyoxyethylene; Weighting agent is made up of 325 order barites, 10 weight part flyash, 800 order Wingdales of 10 weight parts and the 600 order slags of 50 weight parts of 100 weight parts.
A kind of manufacture method of insulating liquid for injecting cement in oil well, it is characterized in that: at first add 7 weight part suspension agents successively in the weighing 100 weight part fresh water, 2 parts by weight diluent, low whipping speed is to stir under the 4000rpm to make mixing solutions in 60 seconds, dissolved 1 hour, with 50 weight part weighting agent low whipping speeds is to add in the above-mentioned dosing in 20 seconds under the 4000rpm, continue then to stir 30 seconds, make spacer pad, wherein suspension agent is by 100 weight part sodium bentonites, the carboxymethyl cellulose of 4 weight part viscosity 6000mPa.s, the Natvosol of 1 weight part xanthan gum and 5 weight part viscosity 10000mPa.s is formed; Thinner is made up of 100 weight part sodium lignosulfonates, 30 weight part sodium laurylsulfonates and 50 weight part alkylphenol polyoxyethylene; Weighting agent is made up of 325 order barites, 10 weight part flyash, 800 order Wingdales of 10 weight parts and the 600 order slags of 50 weight parts of 100 weight parts.
A kind of manufacture method of insulating liquid for injecting cement in oil well, it is characterized in that: at first add 5 weight part suspension agents successively in the weighing 100 weight part fresh water, 4 parts by weight diluent, low whipping speed is to stir under the 4000rpm to make mixing solutions in 60 seconds, dissolved 1 hour, with 100 weight part weighting agent low whipping speeds is to add in the above-mentioned dosing in 20 seconds under the 4000rpm, continue then to stir 30 seconds, make spacer pad, wherein suspension agent is by 100 weight part sodium bentonites, the carboxymethyl cellulose of 4 weight part viscosity 6000mPa.s, the Natvosol of 1 weight part xanthan gum and 5 weight part viscosity 10000mPa.s is formed; Thinner is made up of 100 weight part sodium lignosulfonates, 30 weight part sodium laurylsulfonates and 50 weight part alkylphenol polyoxyethylene; Weighting agent is made up of 325 order barites, 10 weight part flyash, 800 order Wingdales of 10 weight parts and the 600 order slags of 50 weight parts of 100 weight parts.
The detailed description of each component of spacer pad:
Thinner has the polymkeric substance of the zwitterion group that can dissociate out, the anionic group of macromolecule is adsorbed to the weighting agent particle surface, thereby form the unimolecular film of one deck solvation at the weighting agent particle surface, the intergranular cohesion of weighting agent is weakened, the friction of granule resistance reduces, thereby particle is dispersed, and makes the spacer pad viscosity degradation of being prepared, and flowability improves.Thinner can pass through the affinity interaction between the improved effect differing materials such as plasticizing, diminishing, has the effect of infiltration emulsive when the stability of separating liquid system is increased, and can change the wettability of sleeve surface, helps to improve displacement efficiency;
Contain non-ionic polyalcohol in the suspension agent, non-ionic polyalcohol has fabulous anti-dissolubility to dielectric medium.Not ionization in water medium when containing high salt concentration in the solution and stablize, can phenomenon not occur separating out with the heavy metal ion effect.Its nonionic character makes it become the gelling thickener of uniqueness when containing the dielectric solution of high density.Have tackify and the effect of the solid phase particles that washes down from the borehole wall and sleeve surface of suspending, make separating liquid system have higher shear force and improve its stability.
The weighting agent that is adopted is mixtures such as barite and slag, and bar density is 4.2g/cm
3, density isolating liquid can be increased the weight of to 2.0g/cm
3By the slag of screening different-grain diameter, can change the water requirement of weighting agent, improve sedimentation stability.
The present invention's beneficial effect compared with prior art:
1, under lower pump speed, critical turbulent up-hole velocity V
CriticalBe 0.27m/s, regurgitation volume Q on the critical turbulent flow
The boundary FaceFor 42l/s can reach turbulence replacement;
2, has good sedimentation stability;
3, stable, the no considerable change of viscosity with temperature rising of system;
4, can effectively replace and wash mud, prevent that grout and mud from produce mixing slurry, simultaneously can be compatible with the grout and the mud system of routine, dilute and improve cement paste rheological.
Embodiment
Embodiment 1:
For density is 1.31g/cm
3Spacer pad, prepare by 100 weight part fresh water, 50 weight part weighting agents, 7 weight part suspension agents, 2 parts by weight diluent.
At first add 7 weight part suspension agents, 2 parts by weight diluent successively in the weighing 100 weight part fresh water, low whipping speed is to stir under the 4000rpm to make mixing solutions in 60 seconds, dissolved 1 hour, with 50 weight part weighting agent low whipping speeds is to add in the above-mentioned dosing in 20 seconds under the 4000rpm, continue then to stir 30 seconds, make spacer pad.Measuring density is 1.31g/cm
3The spacer pad of preparation is changed in the normal pressure multiviscosisty instrument to descend to stir 20 minutes at 30 ℃, take out, with six its rheologicals of fast rotary viscosity measuring.Prepare one group of spacer pad in addition according to above-mentioned compound method in addition, this spacer pad is put into normal pressure multiviscosisty instrument equally stirred 20 minutes down, use the same method then and measure its rheological at 70 ℃.The result who is tested is a table 1.
The rheological of table 1 spacer pad
Embodiment 2:
For density is 1.5g/cm
3Spacer pad, prepare by 100 weight part fresh water, 100 weight part weighting agents, 5 weight part suspension agents, 4 parts by weight diluent.
At first add 5 weight part suspension agents, 4 parts by weight diluent successively in the weighing 100 weight part fresh water, low whipping speed is to stir under the 4000rpm to make mixing solutions in 60 seconds, dissolved 1 hour, with 100 weight part weighting agent low whipping speeds is to add in the above-mentioned dosing in 20 seconds under the 4000rpm, continue then to stir 30 seconds, make spacer pad.Measuring density is 1.5g/cm
3The spacer pad of preparation is changed in the normal pressure multiviscosisty instrument to descend to stir 20 minutes at 30 ℃, take out, with six its rheologicals of fast rotary viscosity measuring.Prepare one group of spacer pad in addition according to above-mentioned compound method in addition, this spacer pad is put into normal pressure multiviscosisty instrument equally stirred 20 minutes down, use the same method then and measure its rheological at 70 ℃.The result who is tested is a table 2.
The rheological of table 2 spacer pad
According to density is 1.5g/cm
3Calculate critical flow velocity and swallowing-capacity at 70 ℃ of following rheology readers:
Hole diameter D:23 centimetre
Drilling rod or drill collar outside diameter d: 13.97 centimetres
Spacer pad density p: 1.5g/cm
3
Plastic viscosity η
Mould: 0.24 pool
Yield value τ
0: 50 dynes per centimeter
2
V
Critical: 0.27m/s
Q
The boundary faces: 42l/s
Claims (5)
1, a kind of insulating liquid for injecting cement in oil well, it is characterized in that by adding 1～10 weight part suspension agent in the 100 weight part fresh water, 1～10 parts by weight diluent stirs under 4000rpm made mixing solutions in 60 seconds, dissolved 1 hour, be in 20 seconds, the weighting agent of 50～300 weight parts to be added in the above-mentioned dosing under the 4000rpm according to the density requirements low whipping speed then, continue then to stir 30 seconds, make spacer pad, wherein suspension agent is by 100 weight part sodium bentonites, the carboxymethyl cellulose of 4 weight part viscosity 6000mPa.s, the Natvosol of 1 weight part xanthan gum and 5 weight part viscosity 10000mPa.s is formed; Thinner is made up of 100 weight part sodium lignosulfonates, 30 weight part sodium laurylsulfonates and 50 weight part alkylphenol polyoxyethylene; Weighting agent is made up of 325 order barites, 10 weight part flyash, 800 order Wingdales of 10 weight parts and the 600 order slags of 50 weight parts of 100 weight parts.
2, insulating liquid for injecting cement in oil well according to claim 1 is characterized in that by 100 weight part fresh water, and 7 weight part suspension agents, 2 parts by weight diluent, 50 weight part weighting agents are formed; Wherein suspension agent is made up of the Natvosol of carboxymethyl cellulose, 1 weight part xanthan gum and the 5 weight part viscosity 10000mPa.s of 100 weight part sodium bentonites, 4 weight part viscosity 6000mPa.s; Thinner is made up of 100 weight part sodium lignosulfonates, 30 weight part sodium laurylsulfonates and 50 weight part alkylphenol polyoxyethylene; Weighting agent is made up of 325 order barites, 10 weight part flyash, 800 order Wingdales of 10 weight parts and the 600 order slags of 50 weight parts of 100 weight parts.
3, insulating liquid for injecting cement in oil well according to claim 1 is characterized in that by 100 weight part fresh water, and 5 weight part suspension agents, 4 parts by weight diluent, 100 weight part weighting agents are formed; Wherein suspension agent is made up of the Natvosol of carboxymethyl cellulose, 1 weight part xanthan gum and the 5 weight part viscosity 10000mPa.s of 100 weight part sodium bentonites, 4 weight part viscosity 6000mPa.s; Thinner is made up of 100 weight part sodium lignosulfonates, 30 weight part sodium laurylsulfonates and 50 weight part alkylphenol polyoxyethylene; Weighting agent is made up of 325 order barites, 10 weight part flyash, 800 order Wingdales of 10 weight parts and the 600 order slags of 50 weight parts of 100 weight parts.
4, a kind of insulating liquid for injecting cement in oil well manufacture method as claimed in claim 2, it is characterized in that: at first add 7 weight part suspension agents, 2 parts by weight diluent successively in the weighing 100 weight part fresh water, low whipping speed is to stir under the 4000rpm to make mixing solutions in 60 seconds, dissolved 1 hour, with 50 weight part weighting agent low whipping speeds is to add in the above-mentioned dosing in 20 seconds under the 4000rpm, continue then to stir 30 seconds, make spacer pad.
5, a kind of insulating liquid for injecting cement in oil well manufacture method as claimed in claim 3, it is characterized in that: at first add 5 weight part suspension agents, 4 parts by weight diluent successively in the weighing 100 weight part fresh water, low whipping speed is to stir under the 4000rpm to make mixing solutions in 60 seconds, dissolved 1 hour, with 100 weight part weighting agent low whipping speeds is to add in the above-mentioned dosing in 20 seconds under the 4000rpm, continue then to stir 30 seconds, make spacer pad.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610089273 CN100582192C (en) | 2006-08-15 | 2006-08-15 | Insulating liquid for injecting cement in oil well |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200610089273 CN100582192C (en) | 2006-08-15 | 2006-08-15 | Insulating liquid for injecting cement in oil well |
Publications (2)
| Publication Number | Publication Date |
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| CN101126017A CN101126017A (en) | 2008-02-20 |
| CN100582192C true CN100582192C (en) | 2010-01-20 |
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Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102408888B (en) * | 2010-09-21 | 2013-07-03 | 中国石油天然气集团公司 | Rock breaking drilling fluid |
| CN102337108B (en) * | 2011-10-28 | 2012-10-31 | 西南石油大学 | Efficient anti-pollution isolation liquid for well cementation and preparation method thereof |
| CN103224774B (en) * | 2013-04-01 | 2016-01-20 | 中国石油天然气集团公司 | Tensio-active agent is the economic benefits and social benefits Cementing of suspension agent |
| CN104449606B (en) * | 2013-09-13 | 2017-10-31 | 天津中油渤星工程科技有限公司 | A kind of high temperature resistance well cementation insulating liquid and preparation method |
| CN105199690B (en) * | 2014-06-23 | 2017-11-21 | 天津中油渤星工程科技有限公司 | A kind of oil-well cement high temperature resistant suspending agent |
| CN104974723B (en) * | 2015-06-18 | 2017-11-24 | 中石化石油工程技术服务有限公司 | A kind of reinforcing oil well exacerbation insulating liquid and preparation method thereof |
| CN106318352A (en) * | 2016-08-19 | 2017-01-11 | 中国石油集团渤海钻探工程有限公司 | Oil displacement type flushing spacer fluid and preparation method thereof |
| CN106520097A (en) * | 2016-10-21 | 2017-03-22 | 中国石油集团川庆钻探工程有限公司长庆固井公司 | Chemical flushing agent for oil well cement and preparation method and application thereof |
| CN107338027A (en) * | 2017-06-07 | 2017-11-10 | 常州杰轩纺织科技有限公司 | A kind of insulating liquid and preparation method thereof |
| CN107915455B (en) * | 2017-10-20 | 2020-10-27 | 新疆维吾尔自治区煤田灭火工程局 | Composite sand suspending agent for grouting filling and preparation and use method thereof |
| CN110746951A (en) * | 2019-11-04 | 2020-02-04 | 徐婧琦 | AB type pre-flushing fluid for oil field well cementation |
| CN113355070B (en) * | 2021-07-13 | 2022-10-11 | 中石化石油工程技术服务有限公司 | High-temperature-resistant plug pressing fluid for well cementation of oil and gas well and preparation method thereof |
| CN116410707A (en) * | 2021-12-30 | 2023-07-11 | 中国石油天然气集团有限公司 | High-temperature-resistant suspension stabilizer and high-stability oil testing completion fluid prepared from same |
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