CN110760295B - High-temperature tackifier for oil well cement slurry and preparation method thereof - Google Patents
High-temperature tackifier for oil well cement slurry and preparation method thereof Download PDFInfo
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- CN110760295B CN110760295B CN201810826575.7A CN201810826575A CN110760295B CN 110760295 B CN110760295 B CN 110760295B CN 201810826575 A CN201810826575 A CN 201810826575A CN 110760295 B CN110760295 B CN 110760295B
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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
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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
- C09K2208/00—Aspects relating to compositions of drilling or well treatment fluids
- C09K2208/08—Fiber-containing well treatment fluids
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Abstract
The invention relates to an oil well cement slurry high-temperature tackifier and a preparation method thereof. The oil well cement slurry high-temperature tackifier comprises gas phase water-soluble silicon dioxide, a stabilizer, a dispersant, fibers, a filler and the like. The invention has the following advantages of meeting the tackifying effect of fluid in oil well cementing and being suitable for being matched with other oil well additives for use under the condition of 50-160 ℃. The high-temperature tackifier has lower cost and simple manufacturing process, can be widely applied to oil well cementing engineering, and has higher economic and popularization values.
Description
Technical Field
The invention relates to the field of oilfield chemistry, in particular to an oil well cement slurry high-temperature tackifier and a preparation method thereof.
Background
In the process of drilling petroleum and natural gas, along with the development of a drilling process technology and the continuous deepening of China on the development of marine petroleum resources, deep wells, ultra-deep wells and special process wells are increased year by year, so that cement paste tackifiers with excellent high temperature resistance and salt resistance are needed to meet the requirements of site construction. The research on the existing oil field treating agent discovers that the existing treating agent has certain technical defects in the aspect of high-temperature tackifying. Such as: when the temperature of the viscosifiers CMC, biopolymer, polyanionic cellulose and the like commonly used in oil fields exceeds 120 ℃, the temperature resistance and salt resistance are obviously reduced, and some viscosifying and fluid loss reducing effects are even lost. The cement paste is easy to be hydrated and degraded under high temperature or high pressure, so that the development of a high-temperature tackifier for oil well cement paste is needed to overcome the defects.
Chinese patent CN201510848968 (a tackifier for oil-based drilling fluid) discloses a tackifier for oil-based drilling fluid, which has the advantages of high viscosity, moderate dynamic shear force, low filter vector, contribution to well wall stability and high temperature resistance, calcium magnesium resistance and salt resistance after being added into the drilling fluid.
Chinese patent CN201510555752 (a workover fluid viscosity increaser and a manufacturing method) discloses a workover fluid viscosity increaser and a manufacturing method thereof, aiming at solving the technical problem of low high temperature resistance when xanthan gum is used as the viscosity increaser in the prior art.
Chinese patent CN201010593450 (a high temperature resistant tackifier for drilling fluid and a preparation method thereof) relates to a petroleum drilling fluid, and the tackifier realizes the improvement of the temperature resistance of the deep well solid-free drilling fluid and the improvement of the viscosity and the shear force of the drilling fluid.
Research on polyether amino alkyl glycoside type oil-based drilling fluid (applied chemical industry, 2016, 12) proposes that NAPG is used as a main agent, compatible treatment agents such as a tackifier, a filtrate reducer, a plugging agent and the like are preferably selected, and an environment-friendly, low-cost and high-performance NAPG type oil-based drilling fluid system is formed through drilling fluid system construction and formula optimization.
The tackifier belongs to a polymer, has temperature-sensitive characteristic, can adapt to high-temperature environment, solves the problem of leakage, can meet the standard requirement of finally discharged drilling fluid, and is suitable for drilling and developing high-temperature oil-gas reservoirs.
The above documents all use organic products as main agents, and the main problem of the products is that the viscosity is high at low temperature, and the requirements of small pumping pressure of oil well cement slurry are not easy to meet.
Disclosure of Invention
Based on the technical problems, the invention provides the oil well cement slurry high-temperature tackifier which can be used together with other oil well additives at the temperature of 50-160 ℃ and has the temperature resistance of 160 ℃. The oil well cementing high-temperature tackifier provided by the invention mainly takes inorganic materials as main materials, so that molecular chain breakage and degradation of an organic tackifier under a high-temperature condition are overcome.
The invention aims to provide an oil well cement slurry high-temperature tackifier, which is prepared from the following raw materials in parts by weight:
wherein the stabilizer is selected from stabilizers commonly used in the field, preferably at least one of starch, guar gum and xanthan gum.
The dispersant is selected from dispersants commonly used in the art, and preferably at least one selected from the group consisting of methylpentanol, cellulose derivatives, and polyacrylamide.
The fiber is selected from fibers commonly used in the field, and is preferably at least one of polypropylene fiber (polypropylene fiber), polyvinyl chloride fiber (polyvinyl chloride fiber) and polyester fiber.
The filler is selected from fiber commonly used in the field, preferably at least one of attapulgite and bentonite.
The invention can also add various common additives in the field such as AMPS tackifying auxiliary agents and the like according to the processing requirements, and the dosage of the additives is conventional dosage or is adjusted according to the requirements of actual conditions.
The invention also aims to provide a preparation method of the oil well cement slurry high-temperature tackifier, which comprises the following steps: and firing and cooling the filler, and then uniformly mixing the filler with other raw materials to obtain the oil well cement slurry high-temperature tackifier.
Preferably, the filler is fired at a temperature of 750 to 850 ℃ for 3 to 4 hours.
The preparation method specifically comprises the following steps: firing the filler at a high temperature of 800 ℃ for 3 hours, naturally cooling, blowing all solid phase materials into a gas mixing device, and mixing for 4 times until the mixture is uniform.
The oil well cement slurry high-temperature tackifier of the invention has the following advantages: can meet the tackifying effect of fluid in oil well cementing and can be matched with other oil well additives for use at 50-160 ℃.
Compared with the prior art, the invention has the advantages that the high-temperature tackifier for oil well cement is adopted, so that the tackifying effect of the oil well cement can be greatly improved, in addition, the product has lower cost and simple manufacturing process, can be widely applied to oil well cementing engineering, and has higher economic and popularization values.
Detailed Description
All raw materials in the examples were produced by texas continental shelf company.
Example 1
The used stabilizer is xanthan gum, the dispersant is polyacrylamide, the fiber is polypropylene fiber (polypropylene fiber), and the filler is attapulgite. Firing the filler at a high temperature of 800 ℃ for 3 hours, naturally cooling, blowing all solid phase materials into a gas mixing device, and mixing for 4 times until the mixture is uniform.
After the high-temperature tackifier is produced, the high-temperature tackifier is uniformly stirred with cement slurry base slurry according to the following proportion.
The liquid phase was placed in a mixing vessel and the cement slurry was prepared by rotating the mixer at low speed (4000. + -. 200 rpm) and adding the weighed cement and all solid phase material over 15 seconds, covering the mixer lid and continuing the mixing at high speed (12000. + -. 500 rpm) for 35 seconds. Then testing the rheological parameters at 160 ℃ in a high-temperature high-pressure rheometer.
Example 2
The used stabilizer is xanthan gum, the dispersant is polyacrylamide, the fiber is polypropylene fiber (polypropylene fiber), and the filler is attapulgite. Firing the filler at a high temperature of 800 ℃ for 3 hours, naturally cooling, blowing all solid phase materials into a gas mixing device, and mixing for 4 times until the mixture is uniform.
The product is evenly stirred with cement slurry base slurry according to the following proportion after being produced.
The liquid phase was placed in a mixing vessel and the cement slurry was prepared by rotating the mixer at low speed (4000. + -. 200 rpm) and adding the weighed cement and all solid phase material over 15 seconds, covering the mixer lid and continuing the mixing at high speed (12000. + -. 500 rpm) for 35 seconds. Then testing the rheological parameters at 160 ℃ in a high-temperature high-pressure rheometer.
Example 3
The used stabilizer is xanthan gum, the dispersant is polyacrylamide, the fiber is polypropylene fiber (polypropylene fiber), and the filler is attapulgite. Firing the filler at a high temperature of 800 ℃ for 3 hours, naturally cooling, blowing all solid phase materials into a gas mixing device, and mixing for 4 times until the mixture is uniform.
The product is evenly stirred with cement slurry base slurry according to the following proportion after being produced.
The liquid phase was placed in a mixing vessel and the cement slurry was prepared by rotating the mixer at low speed (4000. + -. 200 rpm) and adding the weighed cement and all solid phase material over 15 seconds, covering the mixer lid and continuing the mixing at high speed (12000. + -. 500 rpm) for 35 seconds. Then testing the rheological parameters at 160 ℃ in a high-temperature high-pressure rheometer.
Example 4
The used stabilizer is xanthan gum, the dispersant is polyacrylamide, the fiber is polypropylene fiber (polypropylene fiber), and the filler is attapulgite. Firing the filler at a high temperature of 800 ℃ for 3 hours, naturally cooling, blowing all solid phase materials into a gas mixing device, and mixing for 4 times until the mixture is uniform.
The product is evenly stirred with cement slurry base slurry according to the following proportion after being produced.
The liquid phase was placed in a mixing vessel and the cement slurry was prepared by rotating the mixer at low speed (4000. + -. 200 rpm) and adding the weighed cement and all solid phase material over 15 seconds, covering the mixer lid and continuing the mixing at high speed (12000. + -. 500 rpm) for 35 seconds. Then testing the rheological parameters at 160 ℃ in a high-temperature high-pressure rheometer.
Comparative example 1
The used stabilizer is xanthan gum, the dispersant is polyacrylamide, the fiber is polypropylene fiber (polypropylene fiber), and the filler is attapulgite. Firing the filler at a high temperature of 800 ℃ for 3 hours, naturally cooling, blowing all solid phase materials into a gas mixing device, and mixing for 4 times until the mixture is uniform.
After the tackifier is produced, the tackifier and cement paste base slurry are uniformly stirred according to the following proportion.
The liquid phase was placed in a mixing vessel and the cement slurry was prepared by rotating the mixer at low speed (4000. + -. 200 rpm) and adding the weighed cement and all solid phase material over 15 seconds, covering the mixer lid and continuing the mixing at high speed (12000. + -. 500 rpm) for 35 seconds. Then testing the rheological parameters at 160 ℃ in a high-temperature high-pressure rheometer.
Comparative example 2
The used stabilizer is xanthan gum, the dispersant is polyacrylamide, the fiber is polypropylene fiber (polypropylene fiber), and the filler is attapulgite. Firing the filler at a high temperature of 800 ℃ for 3 hours, naturally cooling, blowing all solid phase materials into a gas mixing device, and mixing for 4 times until the mixture is uniform.
After the tackifier is produced, the tackifier and cement paste base slurry are uniformly stirred according to the following proportion.
The liquid phase was placed in a mixing vessel and the cement slurry was prepared by rotating the mixer at low speed (4000. + -. 200 rpm) and adding the weighed cement and all solid phase material over 15 seconds, covering the mixer lid and continuing the mixing at high speed (12000. + -. 500 rpm) for 35 seconds. Then testing the rheological parameters at 160 ℃ in a high-temperature high-pressure rheometer.
Comparative example 3
And preparing cement paste without adding the tackifier.
The cement slurry base slurry comprises the following components:
the liquid phase was placed in a mixing vessel and the cement slurry was prepared by rotating the mixer at low speed (4000. + -. 200 rpm) and adding the weighed cement and all solid phase material over 15 seconds, covering the mixer lid and continuing the mixing at high speed (12000. + -. 500 rpm) for 35 seconds. Then testing the rheological parameters at 160 ℃ in a high-temperature high-pressure rheometer.
Testing of the cement paste tackifying effect of the examples and comparative examples:
the rheological parameters of different cement slurries at room temperature of 25 ℃ and the rheological parameters under high temperature and high pressure can be measured by adopting a paradigm viscometer and a high temperature and high pressure rheometer. The test results are shown in Table 1, wherein n, k is the flow pattern index, n is dimensionless, and k is Pa. Sn. Comparative example 3 is a neat paste test without the addition of oil well cement high temperature viscosifier, the others are comparative tests.
TABLE 1 comparison of examples with comparative examples
It can be seen from table 1 that the oil well cement high temperature tackifier of the present invention can greatly improve the tackifying effect of oil well cement, and in addition, the product has low cost and simple manufacturing process, can be widely applied to oil well cementing engineering, and has great economic and popularization values.
Claims (4)
1. The high-temperature tackifier for oil well cement paste is characterized by being prepared from the following raw materials in parts by weight:
100 parts of gas-phase water-soluble silicon dioxide;
0.1-1000 parts of a stabilizer;
0.1-1000 parts of a dispersant;
0.1-300 parts of fiber;
0.1-300 parts of a filler;
the stabilizer is selected from at least one of starch, guar gum and xanthan gum; the fiber is selected from at least one of polypropylene fiber, polyvinyl chloride fiber and polyester fiber; the dispersing agent is at least one of methyl amyl alcohol, cellulose derivatives and polyacrylamide; the filler is at least one selected from attapulgite and bentonite.
2. The oil-well cement slurry high-temperature tackifier according to claim 1, wherein the tackifier is prepared from the following raw materials in parts by weight:
100 parts of gas-phase water-soluble silicon dioxide;
1-500 parts of a stabilizer;
1-500 parts of a dispersing agent;
1-200 parts of fiber;
1-200 parts of a filler.
3. A method for preparing an oil-well cement slurry high-temperature tackifier according to claim 1 or 2, characterized by comprising the steps of:
and firing and cooling the filler, and then uniformly mixing the filler with other raw materials to obtain the oil well cement slurry high-temperature tackifier.
4. The method for preparing the oil-well cement slurry high-temperature tackifier according to claim 3, is characterized in that:
firing the filler at a temperature of 750-850 ℃ for 3-4 hours.
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| CN103045214A (en) * | 2013-01-16 | 2013-04-17 | 西南石油大学 | Plugging thixotropic cement paste for oil-gas well and preparation method for same |
| CN105315916A (en) * | 2014-08-04 | 2016-02-10 | 天津格林福环保科技有限公司 | Novel macromolecular multifunctional rubber powder |
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- 2018-07-25 CN CN201810826575.7A patent/CN110760295B/en active Active
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