CN111662695A - Ultralow-density high-strength well cementing fluid system for oil-gas well and preparation method thereof - Google Patents
Ultralow-density high-strength well cementing fluid system for oil-gas well and preparation method thereof Download PDFInfo
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- CN111662695A CN111662695A CN202010587116.5A CN202010587116A CN111662695A CN 111662695 A CN111662695 A CN 111662695A CN 202010587116 A CN202010587116 A CN 202010587116A CN 111662695 A CN111662695 A CN 111662695A
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- 239000012530 fluid Substances 0.000 title claims abstract description 25
- 238000002360 preparation method Methods 0.000 title abstract description 7
- 229920005989 resin Polymers 0.000 claims abstract description 37
- 239000011347 resin Substances 0.000 claims abstract description 37
- 239000004568 cement Substances 0.000 claims abstract description 20
- 238000004132 cross linking Methods 0.000 claims abstract description 11
- 239000003921 oil Substances 0.000 claims abstract description 11
- 239000003431 cross linking reagent Substances 0.000 claims abstract description 10
- 239000002002 slurry Substances 0.000 claims abstract description 10
- 239000003381 stabilizer Substances 0.000 claims abstract description 10
- 239000007788 liquid Substances 0.000 claims abstract description 8
- 239000012745 toughening agent Substances 0.000 claims abstract description 8
- 239000000945 filler Substances 0.000 claims abstract description 7
- 238000004062 sedimentation Methods 0.000 claims abstract description 6
- 238000003756 stirring Methods 0.000 claims description 24
- 239000000203 mixture Substances 0.000 claims description 15
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 8
- 238000002156 mixing Methods 0.000 claims description 5
- 239000003129 oil well Substances 0.000 claims description 5
- 239000013005 self healing agent Substances 0.000 claims description 3
- 239000000377 silicon dioxide Substances 0.000 claims description 3
- DZSVIVLGBJKQAP-UHFFFAOYSA-N 1-(2-methyl-5-propan-2-ylcyclohex-2-en-1-yl)propan-1-one Chemical compound CCC(=O)C1CC(C(C)C)CC=C1C DZSVIVLGBJKQAP-UHFFFAOYSA-N 0.000 claims description 2
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 claims description 2
- 229920001807 Urea-formaldehyde Polymers 0.000 claims description 2
- 150000004982 aromatic amines Chemical class 0.000 claims description 2
- 239000003822 epoxy resin Substances 0.000 claims description 2
- 239000005007 epoxy-phenolic resin Substances 0.000 claims description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 claims description 2
- 239000002184 metal Substances 0.000 claims description 2
- 239000011707 mineral Substances 0.000 claims description 2
- 229920001568 phenolic resin Polymers 0.000 claims description 2
- 229920000647 polyepoxide Polymers 0.000 claims description 2
- 229920001059 synthetic polymer Polymers 0.000 claims description 2
- 150000003512 tertiary amines Chemical class 0.000 claims description 2
- GZCGUPFRVQAUEE-SLPGGIOYSA-N aldehydo-D-glucose Chemical compound OC[C@@H](O)[C@@H](O)[C@H](O)[C@@H](O)C=O GZCGUPFRVQAUEE-SLPGGIOYSA-N 0.000 claims 1
- -1 aliphatic amines Chemical class 0.000 claims 1
- 238000000034 method Methods 0.000 claims 1
- 230000035699 permeability Effects 0.000 abstract description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 4
- 239000003795 chemical substances by application Substances 0.000 abstract description 2
- 230000007797 corrosion Effects 0.000 abstract description 2
- 238000005260 corrosion Methods 0.000 abstract description 2
- 238000005086 pumping Methods 0.000 abstract description 2
- 239000011398 Portland cement Substances 0.000 abstract 1
- 239000000463 material Substances 0.000 description 7
- 239000011368 organic material Substances 0.000 description 4
- 239000012752 auxiliary agent Substances 0.000 description 2
- 229910010272 inorganic material Inorganic materials 0.000 description 2
- 239000011147 inorganic material Substances 0.000 description 2
- 239000002253 acid Substances 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- ZBCBWPMODOFKDW-UHFFFAOYSA-N diethanolamine Chemical compound OCCNCCO ZBCBWPMODOFKDW-UHFFFAOYSA-N 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000005543 nano-size silicon particle Substances 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 239000003469 silicate cement Substances 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 230000008719 thickening Effects 0.000 description 1
Classifications
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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
- C09K8/44—Compositions for cementing, e.g. for cementing casings into boreholes; Compositions for plugging, e.g. for killing wells containing organic binders only
-
- 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
- C09K8/473—Density reducing additives, e.g. for obtaining foamed cement compositions
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention discloses an ultra-low density high strength well cementation liquid system for oil gas wells and a preparation method thereof, wherein the well cementation liquid system comprises the following components in parts by weight: 100 parts of resin, 5-30 parts of resin toughening agent, 20-100 parts of resin cross-linking agent, 0-10 parts of cross-linking assistant, 1-10 parts of sedimentation stabilizer and 0-200 parts of resin filler. The well cementation fluid has stable slurry system, adjustable pumping time and no free water. The ultra-low density cementing fluid reduces the density of the cementing fluid to 1.40g/cm on the premise of not using a lightening admixture and not increasing the water-cement ratio3The cement paste can reach higher early strength than that of the conventional portland cement without using an early strength agent, and meanwhile, the hardened set cement has no apparent shrinkage, the permeability is 0, and the cement paste has better permeability resistance and acid-base corrosion resistance.
Description
Technical Field
The invention relates to an ultra-low density high strength well cementation fluid system for an oil-gas well and a preparation method thereof, belonging to the field of oil-gas well cementation.
Background
In recent years, low-density cement paste systems are mainly adopted for low-pressure and easy-to-leak stratum well cementation, and at present, the density of cement paste is reduced mainly by adopting two modes, namely increasing the water cement ratio and adding a lightening agent taking a low-density filling material as a main component. However, with the decrease of density, the addition of a large amount of non-cementing material lightening admixture in a cement slurry system and the increase of water-cement ratio cause the problems of high permeability, low strength and easy shrinkage of low-density cement, the well cementation quality is difficult to improve, and the packing capacity of an oil-gas well layer cannot be ensured.
Disclosure of Invention
The invention mainly overcomes the defects in the prior art, provides an ultralow-density high-strength cementing fluid system for oil and gas wells and a preparation method thereof, breaks through the conventional thinking of lowering the density of cement slurry by increasing the water cement ratio and adding filling materials such as a lightening admixture, adopts a non-permeable organic material as a main cross-linking material, uses oil well cement as the filling material for density adjustment, forms the combination of the organic material and the inorganic material, and reduces the density of the cementing fluid to 1.40g/cm on the premise of not using the lightening admixture3The following; and has the properties of no permeation, high strength and micro-expansion.
The technical scheme provided by the invention for solving the technical problems is as follows: an ultra-low density high strength well cementation fluid system for oil gas wells comprises the following components in parts by weight: 100 parts of resin, 5-30 parts of resin toughening agent, 20-100 parts of resin cross-linking agent, 0-10 parts of cross-linking assistant, 1-10 parts of sedimentation stabilizer and 0-200 parts of resin filler.
The further technical scheme is that the resin is one or a mixture of epoxy resin, phenolic resin and urea resin.
The further technical proposal is that the resin cross-linking agent is one or a mixture of aliphatic amine, aromatic amine and amidoamine.
The further technical scheme is that the cross-linking auxiliary agent is tertiary amine auxiliary agent.
The further technical proposal is that the sedimentation stabilizer is one or the mixture of two of nano silicon dioxide, nano metal mineral and the mixture of 2-acrylamide-2-methylpropanesulfonic acid synthetic polymer.
The further technical proposal is that the resin filling agent is one or a mixture of more of oil well cement, silica micropowder and self-healing agent.
A preparation method of an ultra-low density high strength well cementation fluid system for an oil gas well comprises the following steps:
a. adding resin and a resin toughening agent into a stirring cup, stirring uniformly at a speed of less than 2000 revolutions per minute, sequentially adding a resin crosslinking agent and a crosslinking assistant, and stirring uniformly at a speed of less than 2000 revolutions per minute;
b. and (3) uniformly mixing the settlement stabilizer and the resin filler in a container, adding the mixture into a stirring slurry cup, and stirring for 40-50s at the speed of 4000 revolutions per minute to finally obtain the ultralow-density well cementation liquid system.
The invention has the following beneficial effects:
(1) the ultralow-density well cementing liquid system prepared by the invention not only has ultralow density and lower elastic modulus, but also has high compressive strength, impact resistance and breaking strength which cannot be achieved by common silicate cement stone, and meanwhile, the system is mainly made of a high-molecular organic material and has the advantages of strong acid and strong alkali corrosion resistance, no shrinkage and 0 permeability. The adjustable range of the density is 1.05-1.60g/cm3The applicable temperature range is 20-150 ℃, and the 48h strength is more than 30 MPa;
(2) the resin is toughened before mixing, and the toughened resin has low viscosity, stable performance and easy slurry preparation; the well cementing liquid system has stable performance.
Detailed Description
The present invention will be further described with reference to the following examples.
Example 1
The invention relates to an ultra-low density high strength well cementation fluid system for an oil gas well, which is prepared by the following steps:
a. adding 100 parts by weight of resin and 20 parts by weight of resin toughening agent into a stirring paddle cup, stirring uniformly at a speed of less than 2000 revolutions per minute, sequentially adding 85 parts by weight of resin crosslinking agent and 0.5 part by weight of crosslinking assistant, and stirring uniformly at a speed of less than 2000 revolutions per minute;
b. 2 parts by weight of sedimentation stabilizer and 50 parts by weight of self-healing agent are mixed and stirred evenly in a container, then the mixture is added into a stirring cup and stirred for 40-50s at the speed of 4000 revolutions per minute, and finally the ultra-low density cementing fluid system of the example 1 is obtained.
Example 2
The invention relates to an ultra-low density high strength well cementation fluid system for an oil gas well, which is prepared by the following steps:
a. adding 100 parts by weight of resin and 20 parts by weight of resin toughening agent into a stirring paddle cup, stirring uniformly at a speed of less than 2000 revolutions per minute, sequentially adding 85 parts by weight of resin crosslinking agent and 4 parts by weight of crosslinking assistant, and stirring uniformly at a speed of less than 2000 revolutions per minute;
b. and (3) uniformly mixing 1 part by weight of settling stabilizer and 200 parts by weight of oil well cement in a container, adding the mixture into a stirring slurry cup, and stirring for 40-50s at the speed of 4000 revolutions per minute to finally obtain the ultralow-density well cementation fluid system of the example 2.
Example 3
The invention relates to an ultra-low density high strength well cementation fluid system for an oil gas well, which is prepared by the following steps:
a. adding 100 parts by weight of resin and 20 parts by weight of resin toughening agent into a stirring paddle cup, stirring uniformly at a speed of less than 2000 revolutions per minute, sequentially adding 85 parts by weight of resin crosslinking agent and 8 parts by weight of crosslinking assistant, and stirring uniformly at a speed of less than 2000 revolutions per minute;
b. and (3) uniformly mixing 0.5 part by weight of settling stabilizer in a container, adding the mixture into a stirring slurry cup, and stirring for 40-50s at the speed of 4000 revolutions per minute to finally obtain the ultralow-density cementing fluid system in the example 3.
The basic cement slurry properties of examples 1 to 3 were measured, and the results are shown in Table 1;
TABLE 1
| Serial number | Example 1 | Example 2 | Example 3 |
| Density (g/cm)3) | 1.20 | 1.60 | 1.05 |
| Density difference (g/cm)3) | 0 | 0 | 0 |
| Thickening time (min) | 270 | 352 | 304 |
| Compressive strength (Mpa) | 45.2 | 42.3 | 56.4 |
It can be seen from table 1 that the main conventional engineering properties of the cementing fluids of examples 1, 2 and 3 of the present invention meet the requirements of cementing construction. The well cementing fluid has good sedimentation stability and adjustable pumping time. The well cementation liquid system breaks through the conventional thinking of reducing the density of cement slurry by increasing the water cement ratio and adding filling materials such as a lightening admixture and the like, and the density of the well cementation liquid is reduced to 1.40g/cm on the premise of not using the lightening admixture by using oil well cement or the filling materials for density adjustment to form the combination of organic materials and inorganic materials3The following; and has the properties of no permeation, high strength and micro-expansion.
Although the present invention has been described with reference to the above embodiments, it should be understood that the present invention is not limited to the above embodiments, and those skilled in the art can make various changes and modifications without departing from the scope of the present invention.
Claims (7)
1. An ultra-low density high strength well cementation fluid system for oil gas well is characterized by comprising the following components in parts by weight: 100 parts of resin, 5-30 parts of resin toughening agent, 20-100 parts of resin cross-linking agent, 0-10 parts of cross-linking assistant, 1-10 parts of sedimentation stabilizer and 0-200 parts of resin filler.
2. The ultra-low density high strength well cementation fluid system of claim 1, wherein the resin is one or a mixture of epoxy resin, phenolic resin and urea formaldehyde resin.
3. The ultra-low density high strength well cementing fluid system for oil and gas wells of claim 1, wherein the resin cross-linking agent is one or a mixture of aliphatic amines, aromatic amines and amidoamines.
4. The ultra-low density high strength well cementation fluid system of claim 1, wherein the cross-linking aid is a tertiary amine aid.
5. The ultra-low density high strength well cementation fluid system of claim 1, wherein the settling stabilizer is one or a mixture of two of nano silica, nano metal mineral and a mixture of 2-acrylamide-2-methylpropanesulfonic acid synthetic polymers.
6. The ultra-low density high strength cementing fluid system for oil and gas wells according to claim 1, wherein the resin filler is one or a mixture of oil well cement, silica micropowder and self-healing agent.
7. A method of preparing an ultra-low density high strength cementing fluid system for oil and gas wells as claimed in any one of claims 1 to 6, comprising the steps of:
a. adding resin and a resin toughening agent into a stirring cup, stirring uniformly at a speed of less than 2000 revolutions per minute, sequentially adding a resin crosslinking agent and a crosslinking assistant, and stirring uniformly at a speed of less than 2000 revolutions per minute;
b. and (3) uniformly mixing the settlement stabilizer and the resin filler in a container, adding the mixture into a stirring slurry cup, and stirring for 40-50s at the speed of 4000 revolutions per minute to finally obtain the ultralow-density well cementation liquid system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010587116.5A CN111662695A (en) | 2020-06-24 | 2020-06-24 | Ultralow-density high-strength well cementing fluid system for oil-gas well and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010587116.5A CN111662695A (en) | 2020-06-24 | 2020-06-24 | Ultralow-density high-strength well cementing fluid system for oil-gas well and preparation method thereof |
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| CN202010587116.5A Pending CN111662695A (en) | 2020-06-24 | 2020-06-24 | Ultralow-density high-strength well cementing fluid system for oil-gas well and preparation method thereof |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105038741A (en) * | 2015-05-18 | 2015-11-11 | 中国石油集团川庆钻探工程有限公司工程技术研究院 | Cementing fluid system and preparation method of same |
| CN106256871A (en) * | 2015-06-19 | 2016-12-28 | 中国石油化工股份有限公司 | A kind of elastoplasticity cementing slurry and preparation method thereof |
| CN107739598A (en) * | 2017-10-31 | 2018-02-27 | 南昌航空大学 | A kind of permanent epoxy resin well cementation agent |
| CN108048054A (en) * | 2017-12-28 | 2018-05-18 | 长江大学 | A kind of well cementation elastic fluid and its preparation method and application |
| CN110484222A (en) * | 2019-07-31 | 2019-11-22 | 中国石油集团工程技术研究院有限公司 | A kind of epoxy resin-matrix cementing fluid and preparation method thereof |
-
2020
- 2020-06-24 CN CN202010587116.5A patent/CN111662695A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105038741A (en) * | 2015-05-18 | 2015-11-11 | 中国石油集团川庆钻探工程有限公司工程技术研究院 | Cementing fluid system and preparation method of same |
| CN106256871A (en) * | 2015-06-19 | 2016-12-28 | 中国石油化工股份有限公司 | A kind of elastoplasticity cementing slurry and preparation method thereof |
| CN107739598A (en) * | 2017-10-31 | 2018-02-27 | 南昌航空大学 | A kind of permanent epoxy resin well cementation agent |
| CN108048054A (en) * | 2017-12-28 | 2018-05-18 | 长江大学 | A kind of well cementation elastic fluid and its preparation method and application |
| CN110484222A (en) * | 2019-07-31 | 2019-11-22 | 中国石油集团工程技术研究院有限公司 | A kind of epoxy resin-matrix cementing fluid and preparation method thereof |
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Application publication date: 20200915 |
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