CN110903817A - Viscosity reducer for reducing viscosity of base liquid of vegetable gum temporary plugging rubber plug and preparation method thereof - Google Patents
Viscosity reducer for reducing viscosity of base liquid of vegetable gum temporary plugging rubber plug and preparation method thereof Download PDFInfo
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- C09K8/42—Compositions for cementing, e.g. for cementing casings into boreholes; Compositions for plugging, e.g. for killing wells
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- 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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- C09K8/60—Compositions for stimulating production by acting on the underground formation
- C09K8/84—Compositions based on water or polar solvents
- C09K8/86—Compositions based on water or polar solvents containing organic compounds
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Abstract
The invention provides a viscosity reducer for reducing the viscosity of a base liquid of a vegetable gum temporary plugging rubber plug and a preparation method thereof, wherein the method comprises the following steps: (1) adding a boron compound into the mixed solvent, and completely dissolving the boron compound to obtain a solution A; (2) adding an alkali to the solution A to adjust the system to be alkaline; heating the system, and adding the polyhydroxy acid salt to react under the stirring condition to obtain an organic boron solution; (3) after the organoboron solution is cooled, adding borax into the organoboron solution to obtain a semisolid substance; (4) and drying the semisolid substance, grinding the dried solid substance into powder and rolling to obtain the viscosity reducer for reducing the viscosity of the base liquid of the vegetable gum temporary plugging rubber plug. The viscosity reducer is a boron ion-rich viscosity reducer, and can solve the problem of construction difficulty caused by fast swelling and high viscosity of the base liquid of the vegetable gum temporary plugging rubber plug.
Description
Technical Field
The invention relates to a viscosity reducer for reducing viscosity of a base liquid of a vegetable gum temporary plugging rubber plug and a preparation method thereof, belonging to the technical field of oil exploitation.
Background
Due to the seepage capability among cracks or the heterogeneity of reservoirs, a chemical temporary plugging rubber plug is adopted to plug old cracks in the old well repeated fracturing, unconventional reservoir volume fracturing, vertical well layered fracturing, horizontal well staged fracturing and complex well reconstruction, the trend of the fractured cracks is changed in a mode of not strongly plugging stratum rock pores, new cracks are made, oil flow channels are improved, and the purpose of increasing the yield is achieved. The plant gum temporary plugging rubber plug is an important class of temporary plugging rubber plugs, and is a high-strength jelly type rubber plug formed by using high-concentration plant gum base liquid and a cross-linking agent matched with the high-concentration plant gum base liquid. In the field use process, a delayed crosslinking agent is generally adopted, and the swelling of the vegetable gum in water is delayed or prevented by changing a crosslinking environment and the like, so that the low viscosity of the base liquid at the initial construction stage is realized. However, the above-mentioned methods have limited ability to retard or prevent the swelling of the vegetable gum, and the viscosity rapidly increases after the addition of the cross-linking agent, which also increases the construction friction. Because the increase of the viscosity of the vegetable gum base liquid to the construction risk at the initial stage is difficult to solve, the application of the vegetable gum temporary plugging rubber plug is not as wide as the application of the polymer temporary plugging rubber plug.
Chinese patent CN106350043A mentions that soluble polymers can be used in carboxymethyl starch with self-swelling function to form temporary plugging agent; chinese patent CN107129560A mentions a method for synthesizing temporary plugging particles by using vegetable gums such as corn starch as raw materials; chinese patent CN103725275A mentions a method for synthesizing a plugging rubber plug by using a mixture of a polymer and a vegetable gum as raw materials; however, the methods described above all use vegetable gum as the raw material of the rubber plug, but do not describe how the prepared high-viscosity base solution is constructed without affecting the effect.
Therefore, the technical problems to be solved in the art are solved by providing a viscosity reducer for reducing the viscosity of the base liquid of the vegetable gum temporary plugging rubber plug and a preparation method thereof.
Disclosure of Invention
In order to solve the above disadvantages and shortcomings, an object of the present invention is to provide a method for preparing a viscosity reducer for reducing the viscosity of a base fluid of a vegetable gum temporary plugging rubber plug.
The invention also aims to provide the viscosity reducer for reducing the viscosity of the base liquid of the vegetable gum temporary plugging rubber plug prepared by the preparation method.
The invention also aims to provide a vegetable gum temporary plugging rubber plug precursor mixture which comprises the viscosity reducer for reducing the viscosity of the base liquid of the vegetable gum temporary plugging rubber plug.
Still another object of the present invention is to provide a vegetable gum temporary plugging rubber plug base fluid comprising the vegetable gum temporary plugging rubber plug precursor mixture.
The invention also aims to provide application of the vegetable gum temporary plugging rubber plug base fluid in repeated fracturing of old wells, unconventional reservoir volume fracturing, vertical well separate-layer fracturing, horizontal well staged fracturing and complex-condition well reconstruction.
In order to achieve the above objects, in one aspect, the present invention provides a preparation method of a viscosity reducer for reducing viscosity of a base liquid of a vegetable gum temporary plugging rubber plug, wherein the preparation method comprises the following steps:
(1) adding a boron compound into the mixed solvent, and completely dissolving the boron compound to obtain a solution A;
(2) adding an alkali to the solution A to adjust the system to be alkaline; heating the system, and adding the polyhydroxy acid salt to react under the stirring condition to obtain an organic boron solution;
(3) after the organoboron solution is cooled, adding borax into the organoboron solution to obtain a semisolid substance;
(4) and drying the semisolid substance, grinding the dried solid substance into powder and rolling to obtain the viscosity reducer for reducing the viscosity of the base liquid of the vegetable gum temporary plugging rubber plug.
According to a specific embodiment of the present invention, in the preparation method, the step (1) specifically comprises: adding boron compound into the mixed solvent, heating to 70-75 ℃, and stirring for 10-20min at the temperature to completely dissolve the boron compound to obtain solution A.
According to a specific embodiment of the invention, in the step (1) of the preparation method, the mixed solvent is a mixture of water and glycerol, and the volume ratio of the water to the glycerol is 1:1-1: 3.
According to a specific embodiment of the present invention, in the preparation method, the boron compound is used in an amount of 10 to 15% by volume of the mixed solvent.
According to a specific embodiment of the present invention, in the preparation method, the boron compound comprises one or a combination of borax, boric acid, sodium diborate and sodium pentaborate.
According to a specific embodiment of the present invention, in the step (2) of the preparation method, the amount of the base is 1 to 5% by volume of the mixed solvent.
According to a specific embodiment of the present invention, in the preparation method, the alkali comprises one or more of sodium carbonate, sodium bicarbonate and sodium hydroxide.
According to a specific embodiment of the present invention, in the step (2) of the preparation method, the polyhydroxy acid salt is used in an amount of 10 to 25% by volume of the mixed solvent.
According to a specific embodiment of the present invention, in the preparation method, the polyhydroxy acid salt includes one or a combination of several of sodium gluconate, sodium alginate, sodium hydroxysulfonate and glycerol sodium salt.
According to a specific embodiment of the present invention, in the step (2) of the preparation method, the temperature is raised to raise the temperature of the system to 80-95 ℃.
According to a specific embodiment of the present invention, in the step (2) of the preparation method, the reaction temperature is 80 to 95 ℃ and the reaction time is 4 to 5 hours.
According to the specific embodiment of the present invention, in a preferred embodiment of the present invention, the stirring in step (2) is performed at a low speed, but the present invention does not specifically require the specific stirring speed of the stirring, and a person skilled in the art can reasonably set the stirring speed according to the operation requirement as long as the object of the present invention can be achieved.
According to a specific embodiment of the invention, in the step (3) of the preparation method, the volume ratio of the organoboron solution to the borax is 1:1-1: 2.
According to a specific embodiment of the present invention, in the step (4) of the preparation method, a mixed solvent is added during the spheronization process as a solvent for the spheronization process.
According to a specific embodiment of the invention, in the step (4) of the preparation method, the volume ratio of the mixed solvent used in the spheronization process to the semi-solid substance is 1: 0.3-0.5.
According to a specific embodiment of the present invention, in the step (4) of the preparation method, the mixed solvent used in the spheronization process is a mixture of water and glycerol, and the volume ratio of the two is 1:1-1: 3.
According to a specific embodiment of the invention, in the preparation method, the viscosity reducer for reducing the viscosity of the base liquid of the vegetable gum temporary plugging rubber plug is in a granular shape, and the particle size (diameter) of the viscosity reducer is 2-4 mm.
On the other hand, the invention also provides the viscosity reducer for reducing the viscosity of the base liquid of the vegetable gum temporary plugging rubber plug, which is prepared by the preparation method of the viscosity reducer for reducing the viscosity of the base liquid of the vegetable gum temporary plugging rubber plug.
According to a particular embodiment of the invention, said viscosity reducing agent is in the form of particles having a size (diameter) of 2-4 mm.
On the other hand, the invention also provides a vegetable gum temporary plugging rubber plug precursor mixture which comprises vegetable gum and the viscosity reducer for reducing the viscosity of the base liquid of the vegetable gum temporary plugging rubber plug.
According to a specific embodiment of the invention, in the mixture of the vegetable gum temporary plugging rubber plug precursor, the volume ratio of the viscosity reducer to the vegetable gum is 0.8-1.5: 5.
According to a specific embodiment of the present invention, in the mixture of the plant gum temporary plugging rubber plug precursor, the plant gum comprises one or more of guar gum and derivatives thereof, fenugreek gum and derivatives thereof, and sesbania gum.
Wherein, the derivatives of guar gum (such as hydroxypropyl guar gum) and fenugreek gum are conventional substances used in the field, and can be obtained by commercial or self-preparation.
In another aspect, the invention further provides a vegetable gum temporary plugging rubber plug base solution, which comprises the vegetable gum temporary plugging rubber plug precursor mixture and water.
According to the specific embodiment of the invention, in the vegetable gum temporary plugging rubber plug base solution, the amount of the vegetable gum temporary plugging rubber plug precursor mixture is 5-10% of the volume of water.
On the other hand, the invention also provides application of the vegetable gum temporary plugging rubber plug base fluid in repeated fracturing of old wells, unconventional reservoir volume fracturing, vertical well separate layer fracturing, horizontal well staged fracturing and complex well reconstruction.
According to the specific embodiment of the invention, the vegetable gum temporary plugging rubber plug base fluid can be applied to old well repeated fracturing, unconventional reservoir volume fracturing, vertical well separate layer fracturing, horizontal well staged fracturing, complex well and other reservoir reconstruction needing temporary packing.
The viscosity reducer for reducing the viscosity of the base liquid of the vegetable gum temporary plugging rubber plug is a boron ion-rich viscosity reducer, and can solve the problem of construction difficulty caused by high viscosity of the base liquid of the vegetable gum temporary plugging rubber plug due to fast swelling. The viscosity reducer can be directly placed into the vegetable gum, and when the vegetable gum base liquid is prepared subsequently, the high-concentration boron ions can enable the vegetable gum to be easy to curl water and branched chains and not beneficial to permeation and combination of water molecules, so that swelling of the vegetable gum in water is limited, and the purpose of reducing the viscosity of the vegetable gum base liquid is achieved. In subsequent construction, a cross-linking agent and a regulator are added to provide a cross-linking group, and a cross-linking environment is changed to open the vegetable gum branched chain and combine with the cross-linking agent to form a high-strength jelly glue type rubber plug, so that reservoir cracks are blocked.
Drawings
FIG. 1 is a graph showing the relationship between viscosity and the amount of viscosity reducer used in test example 2 of the present invention.
Detailed Description
In order to clearly understand the technical features, objects and advantages of the present invention, the following detailed description of the technical solutions of the present invention will be made with reference to the following specific examples, which should not be construed as limiting the implementable scope of the present invention.
Example 1
The embodiment provides a viscosity reducer for reducing the viscosity of a base liquid of a vegetable gum temporary plugging rubber plug, which is prepared by a preparation method comprising the following steps:
adding 10V/V% (25mL) boric acid into 250mL mixed solvent of water and glycerol (the mixing ratio is 1:1), heating to 75 ℃, stirring for 20min at the temperature until the boron compound is completely dissolved, adding 2V/V% (2.5mL) sodium hydroxide to adjust the pH value of the reaction to be alkaline, heating the mixture to 90 ℃, keeping the temperature basically constant during the heating, adding 10V/V% (25mL) sodium gluconate under the condition of low-speed stirring, and reacting for 4 hours to obtain the organic boron solution. After cooling the organic boron solution, adding borax, and mixing the two according to the volume ratio of 1:1 to form a semisolid substance; putting the semisolid substance into a dryer to be dried into a solid state, grinding the dried solid substance into powder, putting the powder into a rounding machine to be rounded, adding a mixed solvent of water and glycerol (the mixing ratio is 1:1) serving as a solvent in the rounding process, and rounding the powder into 2mm particles to obtain the viscosity reducer for reducing the viscosity of the base liquid of the vegetable gum temporary plugging rubber plug, wherein the viscosity reducer is marked as viscosity reducer A.
Example 2
The embodiment provides a viscosity reducer for reducing the viscosity of a base liquid of a vegetable gum temporary plugging rubber plug, which is prepared by a preparation method comprising the following steps:
adding 12V/V% (60mL) borax into 500mL of mixed solvent of water and glycerol (the mixing ratio is 1:3), heating to 70 ℃, stirring for 20min at the temperature until the boron compound is completely dissolved, adding 1V/V% (5mL) sodium hydroxide and 3V/V% (15mL) sodium bicarbonate to adjust the pH value of the reaction to be alkaline, heating the mixture to 90 ℃, keeping the temperature basically constant during the reaction, adding 25V/V% (125mL) sodium alginate under the condition of low-speed stirring, and reacting for 4.5 hours to obtain the organic boron solution. After cooling the organic boron solution, adding borax, and mixing the two according to the volume ratio of 1:1 to form a semisolid substance; and (2) putting the semisolid substance into a dryer to be dried to be in a solid state, grinding the dried solid substance into powder, putting the powder into a rounding machine to be rounded, adding a mixed solvent (the mixing ratio is 1:1) of water and glycerol into the rounding process to serve as a solvent in the rounding process, and rounding the powder to form 4mm particles to obtain the viscosity reducer for reducing the viscosity of the base liquid of the vegetable gum temporary plugging rubber plug, wherein the viscosity reducer is marked as viscosity reducer B.
Example 3
The embodiment provides a vegetable gum temporary plugging rubber plug base fluid which is prepared by a method comprising the following steps:
adding the viscosity reducer A obtained in example 1 into guar gum to form a mixture, wherein the volume ratio of the viscosity reducer A to the guar gum is 0.8: 5;
and dissolving the mixture in water at a volume ratio of 6:100 to prepare the base liquid of the vegetable gum temporary plugging rubber plug, which is marked as base liquid A.
Example 4
The embodiment provides a vegetable gum temporary plugging rubber plug base fluid which is prepared by a method comprising the following steps:
adding the viscosity reducer B obtained in the example 2 into hydroxypropyl guar gum to form a mixture, wherein the volume ratio of the viscosity reducer B to the hydroxypropyl guar gum is 1: 5;
and dissolving the mixture in water at a volume ratio of 8:100 to prepare the base liquid of the vegetable gum temporary plugging rubber plug, which is marked as base liquid B.
Test example 1
The viscosity of the base fluid A provided in example 3 at different preparation times is measured, and the viscosity data is shown in the following Table 1, wherein the viscosity is measured according to the water-based fracturing fluid performance evaluation method SY/T5107-2016 in the oil and gas industry.
TABLE 1
| Test time (min) | Viscosity, |
| 0 | 9 |
| 1 | 9 |
| 3 | 9 |
| 5 | 7.5 |
| 10 | 6 |
| 15 | 6 |
| 20 | 6 |
| 30 | 6 |
| 60 | 6 |
As can be seen from table 1, the viscosity of the base solution of the vegetable gum temporary plugging rubber plug provided in example 3 of the present invention can be maintained below 10mPa · s.
Test example 2
Adding different amounts of viscosity reducer B prepared in example 2 into hydroxypropyl guar gum to form a mixture, wherein the volume ratio of the viscosity reducer B to the hydroxypropyl guar gum is 0.8:5, 1.0:5, 1.2:5, 1.4:5 and 1.5:5 respectively;
and respectively dissolving the mixtures in water, wherein the volume ratio of the mixture to the water is 8:100, and preparing the vegetable gum temporary plugging rubber plug base liquid.
The viscosity of the vegetable gum temporary plugging rubber plug base liquid is respectively tested after 10min of preparation, and the viscosity measurement is carried out according to the water-based fracturing fluid performance evaluation method of the oil and gas industry standard SY/T5107-2016.
The relationship between the viscosity and the dosage of the viscosity reducer is shown in fig. 1, and it can be known from fig. 1 that the viscosity of the base liquid of the vegetable gum temporary plugging rubber plug is in a descending trend along with the continuous increase of the dosage of the viscosity reducer, which indicates that the viscosity reducer provided by the invention has the function of reducing the viscosity. Specifically, when the volume ratio of the viscosity reducer B to the hydroxypropyl guar gum provided in the embodiment of the invention is 0.8:5, 1.0:5, 1.2:5, 1.4:5, and 1.5:5 (namely V/V is 0.16, 0.20, 0.24, 0.28, and 0.30), respectively, the viscosity of the base liquid of the vegetable gum temporary plugging rubber plug can be reduced to less than 10mPa · s, and the use of the viscosity reducer for reducing the viscosity of the base liquid of the vegetable gum temporary plugging rubber plug provided by the invention can avoid the occurrence of construction failure caused by excessively high viscosity of the base liquid in the liquid preparation and construction processes.
Claims (24)
1. The preparation method of the viscosity reducer for reducing the viscosity of the base liquid of the vegetable gum temporary plugging rubber plug is characterized by comprising the following steps of:
(1) adding a boron compound into the mixed solvent, and completely dissolving the boron compound to obtain a solution A;
(2) adding an alkali to the solution A to adjust the system to be alkaline; heating the system, and adding the polyhydroxy acid salt to react under the stirring condition to obtain an organic boron solution;
(3) after the organoboron solution is cooled, adding borax into the organoboron solution to obtain a semisolid substance;
(4) and drying the semisolid substance, grinding the dried solid substance into powder and rolling to obtain the viscosity reducer for reducing the viscosity of the base liquid of the vegetable gum temporary plugging rubber plug.
2. The method according to claim 1, wherein the step (1) specifically comprises: adding boron compound into the mixed solvent, heating to 70-75 ℃, and stirring for 10-20min at the temperature to completely dissolve the boron compound to obtain solution A.
3. The method according to claim 1 or 2, wherein the mixed solvent in the step (1) is a mixture of water and glycerol at a volume ratio of 1:1 to 1: 3.
4. The production method according to claim 1 or 2, wherein the boron compound is used in an amount of 10 to 15% by volume based on the volume of the mixed solvent.
5. The preparation method of claim 4, wherein the boron compound comprises one or more of borax, boric acid, sodium diborate and sodium pentaborate.
6. The production method according to claim 1 or 2, wherein the amount of the base used in the step (2) is 1 to 5% by volume of the mixed solvent.
7. The method according to claim 6, wherein the alkali comprises one or more of sodium carbonate, sodium bicarbonate and sodium hydroxide.
8. The method according to claim 1 or 2, wherein the amount of the polyhydroxyacid salt used in the step (2) is 10 to 25% by volume based on the mixed solvent.
9. The method according to claim 6, wherein the polyhydroxy acid salt comprises one or more of sodium gluconate, sodium alginate, sodium hydroxysulfonate and glycerol sodium salt.
10. The production method according to claim 1 or 2, wherein the temperature rise in the step (2) is a temperature rise of the system to 80 to 95 ℃.
11. The production method according to claim 1 or 2, wherein the temperature of the reaction in the step (2) is 80 to 95 ℃ and the reaction time is 4 to 5 hours.
12. The production method according to claim 1 or 2, wherein in the step (3), the volume ratio of the organoboron solution to the borax is from 1:1 to 1: 2.
13. The production method according to claim 1 or 2, wherein a mixed solvent is added during the spheronization in step (4) as a solvent for the spheronization.
14. The method according to claim 13, wherein the volume ratio of the mixed solvent to the semisolid substance is 1:0.3 to 0.5.
15. The method according to claim 14, wherein the mixed solvent is a mixture of water and glycerol at a volume ratio of 1:1 to 1: 3.
16. The preparation method according to claim 1 or 2, wherein the viscosity reducer for reducing the viscosity of the base liquid of the vegetable gum temporary plugging rubber plug is in a granular shape, and the grain diameter of the viscosity reducer is 2-4 mm.
17. The viscosity reducer for reducing the viscosity of the base liquid of the vegetable gum temporary plugging rubber plug prepared by the preparation method of the viscosity reducer for reducing the viscosity of the base liquid of the vegetable gum temporary plugging rubber plug according to any one of claims 1 to 16.
18. The viscosity reducer according to claim 17, wherein the viscosity reducer is in the form of particles having a particle size of 2 to 4 mm.
19. A vegetable gum temporary plugging plug precursor mixture comprising a vegetable gum and the viscosity reducer of claim 17 or 18 for reducing the viscosity of a base fluid of a vegetable gum temporary plugging plug.
20. The plant gum temporary plugging rubber plug precursor mixture according to claim 19, wherein the volume ratio of the viscosity reducer to the plant gum is 0.8-1.5: 5.
21. The plant gum temporary plugging rubber plug precursor mixture according to claim 19 or 20, wherein said plant gum comprises one or a combination of guar gum and its derivatives, fenugreek gum and its derivatives, sesbania gum.
22. A vegetable gum temporary plugging plug base fluid comprising the vegetable gum temporary plugging plug precursor mixture of any one of claims 19-21 and water.
23. The vegetable gum temporary plugging rubber plug base solution according to claim 22, wherein the amount of the vegetable gum temporary plugging rubber plug precursor mixture is 5-10% of the water volume.
24. Use of a vegetable gum temporary plug base fluid according to claim 22 or 23 in re-fracturing old wells, fracturing unconventional reservoir volumes, vertical well zonal fracturing, horizontal well zonal fracturing and the modification of complex-case wells.
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2411559A1 (en) * | 2001-11-13 | 2003-05-13 | Baker Hughes Incorporated | Deep water completions fracturing fluid compositions |
| CN1524920A (en) * | 2003-02-28 | 2004-09-01 | 中国石油天然气股份有限公司 | Organic boron delay cross-linking plant adhesive breakdown fluid |
| US20060205605A1 (en) * | 2005-03-08 | 2006-09-14 | Dessinges Marie N | Well treatment composition crosslinkers and uses thereof |
| US20110257050A1 (en) * | 2004-09-15 | 2011-10-20 | Marie Noelle Dessinges | Dry blend fracturing fluid additives |
| CN102732244A (en) * | 2012-07-04 | 2012-10-17 | 中国石油天然气股份有限公司 | Cross-linking agent for fracturing fluid with ultralow hydroxypropyl guar concentration and fracturing fluid prepared from cross-linking agent |
| CN103265943A (en) * | 2013-05-07 | 2013-08-28 | 四川省博仁达石油科技有限公司 | Cross-linking agent for low concentration guanidine gum pressing crack system and preparation technology thereof |
| CN106467736A (en) * | 2015-08-21 | 2017-03-01 | 中国石油化工股份有限公司 | A kind of fracturing fluid for shale pressure break and preparation method thereof |
-
2018
- 2018-09-17 CN CN201811081578.9A patent/CN110903817B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2411559A1 (en) * | 2001-11-13 | 2003-05-13 | Baker Hughes Incorporated | Deep water completions fracturing fluid compositions |
| CN1524920A (en) * | 2003-02-28 | 2004-09-01 | 中国石油天然气股份有限公司 | Organic boron delay cross-linking plant adhesive breakdown fluid |
| US20110257050A1 (en) * | 2004-09-15 | 2011-10-20 | Marie Noelle Dessinges | Dry blend fracturing fluid additives |
| US20060205605A1 (en) * | 2005-03-08 | 2006-09-14 | Dessinges Marie N | Well treatment composition crosslinkers and uses thereof |
| CN102732244A (en) * | 2012-07-04 | 2012-10-17 | 中国石油天然气股份有限公司 | Cross-linking agent for fracturing fluid with ultralow hydroxypropyl guar concentration and fracturing fluid prepared from cross-linking agent |
| CN103265943A (en) * | 2013-05-07 | 2013-08-28 | 四川省博仁达石油科技有限公司 | Cross-linking agent for low concentration guanidine gum pressing crack system and preparation technology thereof |
| CN106467736A (en) * | 2015-08-21 | 2017-03-01 | 中国石油化工股份有限公司 | A kind of fracturing fluid for shale pressure break and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 吴越等: "压裂返排液中残余硼交联剂掩蔽方法", 《石油钻采工艺》 * |
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