CN116218504A - Fracturing fluid capable of effectively reducing adsorption of guanidine gum on rock surface and preparation method thereof - Google Patents
Fracturing fluid capable of effectively reducing adsorption of guanidine gum on rock surface and preparation method thereof Download PDFInfo
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- ZRALSGWEFCBTJO-UHFFFAOYSA-N Guanidine Chemical compound NC(N)=N ZRALSGWEFCBTJO-UHFFFAOYSA-N 0.000 title claims abstract description 112
- 239000012530 fluid Substances 0.000 title claims abstract description 89
- 239000011435 rock Substances 0.000 title claims abstract description 67
- CHJJGSNFBQVOTG-UHFFFAOYSA-N N-methyl-guanidine Natural products CNC(N)=N CHJJGSNFBQVOTG-UHFFFAOYSA-N 0.000 title claims abstract description 56
- SWSQBOPZIKWTGO-UHFFFAOYSA-N dimethylaminoamidine Natural products CN(C)C(N)=N SWSQBOPZIKWTGO-UHFFFAOYSA-N 0.000 title claims abstract description 56
- 238000001179 sorption measurement Methods 0.000 title claims abstract description 46
- 238000002360 preparation method Methods 0.000 title claims abstract description 19
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical class [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 55
- 238000003756 stirring Methods 0.000 claims abstract description 25
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 25
- 239000000654 additive Substances 0.000 claims abstract description 17
- 230000000996 additive effect Effects 0.000 claims abstract description 17
- 239000004927 clay Substances 0.000 claims abstract description 17
- 239000003431 cross linking reagent Substances 0.000 claims abstract description 17
- 239000003381 stabilizer Substances 0.000 claims abstract description 17
- 238000002156 mixing Methods 0.000 claims abstract description 7
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical group [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 22
- 229910021389 graphene Inorganic materials 0.000 claims description 19
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims description 18
- WCUXLLCKKVVCTQ-UHFFFAOYSA-M Potassium chloride Chemical group [Cl-].[K+] WCUXLLCKKVVCTQ-UHFFFAOYSA-M 0.000 claims description 18
- JBEALTJSEDAOGI-UHFFFAOYSA-N FC=1C(=C(C(=C(C=1F)F)F)O)C(C(C(C(C(C(C(C(C(F)(F)F)(F)F)(F)F)(F)F)(F)F)(F)F)(F)F)(F)F)(F)F Chemical group FC=1C(=C(C(=C(C=1F)F)F)O)C(C(C(C(C(C(C(C(C(F)(F)F)(F)F)(F)F)(F)F)(F)F)(F)F)(F)F)(F)F)(F)F JBEALTJSEDAOGI-UHFFFAOYSA-N 0.000 claims description 13
- 229940051841 polyoxyethylene ether Drugs 0.000 claims description 13
- 229920000056 polyoxyethylene ether Polymers 0.000 claims description 13
- -1 2- (((2-hydroxyethyl) amino) methyl) succinic acid Chemical compound 0.000 claims description 11
- JDXXTKLHHZMVIO-UHFFFAOYSA-N 2-(3-hydroxypropyl)guanidine Chemical compound NC(=N)NCCCO JDXXTKLHHZMVIO-UHFFFAOYSA-N 0.000 claims description 11
- 229910021538 borax Inorganic materials 0.000 claims description 11
- UQGFMSUEHSUPRD-UHFFFAOYSA-N disodium;3,7-dioxido-2,4,6,8,9-pentaoxa-1,3,5,7-tetraborabicyclo[3.3.1]nonane Chemical compound [Na+].[Na+].O1B([O-])OB2OB([O-])OB1O2 UQGFMSUEHSUPRD-UHFFFAOYSA-N 0.000 claims description 11
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 11
- 235000010339 sodium tetraborate Nutrition 0.000 claims description 11
- 239000004328 sodium tetraborate Substances 0.000 claims description 11
- 239000007864 aqueous solution Substances 0.000 claims description 10
- 239000001103 potassium chloride Substances 0.000 claims description 9
- 235000011164 potassium chloride Nutrition 0.000 claims description 9
- 239000002994 raw material Substances 0.000 claims description 6
- QDRKDTQENPPHOJ-UHFFFAOYSA-N sodium ethoxide Chemical compound [Na+].CC[O-] QDRKDTQENPPHOJ-UHFFFAOYSA-N 0.000 claims description 6
- 238000001035 drying Methods 0.000 claims description 5
- 239000007788 liquid Substances 0.000 claims description 5
- 238000001914 filtration Methods 0.000 claims description 4
- 102000008186 Collagen Human genes 0.000 claims description 3
- 108010035532 Collagen Proteins 0.000 claims description 3
- 229920001436 collagen Polymers 0.000 claims description 3
- BPMFZUMJYQTVII-UHFFFAOYSA-N guanidinoacetic acid Chemical compound NC(=N)NCC(O)=O BPMFZUMJYQTVII-UHFFFAOYSA-N 0.000 claims description 3
- 239000000843 powder Substances 0.000 claims description 3
- 238000005303 weighing Methods 0.000 claims description 2
- 230000009466 transformation Effects 0.000 abstract description 5
- 239000002562 thickening agent Substances 0.000 description 21
- 239000011148 porous material Substances 0.000 description 8
- 229920002907 Guar gum Polymers 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000000665 guar gum Substances 0.000 description 4
- 229960002154 guar gum Drugs 0.000 description 4
- 235000010417 guar gum Nutrition 0.000 description 4
- 239000002861 polymer material Substances 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- 238000004220 aggregation Methods 0.000 description 3
- 230000002776 aggregation Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 238000009833 condensation Methods 0.000 description 2
- 230000005494 condensation Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000009472 formulation Methods 0.000 description 2
- 230000014759 maintenance of location Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000002086 nanomaterial Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 238000001132 ultrasonic dispersion Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 229920002521 macromolecule Polymers 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000004094 surface-active agent Substances 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
- C09K8/60—Compositions for stimulating production by acting on the underground formation
- C09K8/62—Compositions for forming crevices or fractures
- C09K8/66—Compositions based on water or polar solvents
- C09K8/665—Compositions based on water or polar solvents containing inorganic compounds
-
- 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
- C09K8/60—Compositions for stimulating production by acting on the underground formation
- C09K8/62—Compositions for forming crevices or fractures
- C09K8/66—Compositions based on water or polar solvents
- C09K8/68—Compositions based on water or polar solvents containing organic compounds
-
- 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
- C09K8/60—Compositions for stimulating production by acting on the underground formation
- C09K8/62—Compositions for forming crevices or fractures
- C09K8/66—Compositions based on water or polar solvents
- C09K8/68—Compositions based on water or polar solvents containing organic compounds
- C09K8/685—Compositions based on water or polar solvents containing organic compounds containing cross-linking agents
-
- 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
- C09K2208/12—Swell inhibition, i.e. using additives to drilling or well treatment fluids for inhibiting clay or shale swelling or disintegrating
Abstract
The invention discloses a fracturing fluid capable of effectively reducing adsorption of guanidine gum on the surface of rock and a preparation method thereof. Based on 100mL of water, the fracturing fluid comprises the following components in percentage by weight: 0.2 to 0.7 percent of guanidine gum, 0.1 to 0.5 percent of modified graphene oxide, 0.05 to 0.1 percent of cleanup additive, 0.5 to 3 percent of clay stabilizer, 0.05 to 0.15 percent of pH regulator and 0.1 to 0.3 percent of cross-linking agent. Adding clay stabilizer into water, then adding guanidine gum, and stirring until the guanidine gum is completely dispersed; adding modified graphene oxide, stirring uniformly, and adding a cleanup additive, and mixing uniformly to obtain fracturing fluid base fluid capable of effectively reducing adsorption of guanidine gum on the surface of rock; and adding a pH regulator and a cross-linking agent into the obtained base solution, and stirring uniformly to obtain the fracturing fluid capable of effectively reducing adsorption of the guanidine gum on the rock surface. The fracturing fluid can prevent the radius of the channel between rocks from being blocked after the yield-increasing transformation operation, so that the flowing capacity of oil-gas fluid is greatly increased.
Description
1. Technical field:
the invention relates to the technical field of guar gum fracturing fluid, in particular to fracturing fluid capable of effectively reducing adsorption of guar gum on the surface of rock and a preparation method of the fracturing fluid.
2. The background technology is as follows:
the greater the radius of the channel, the less the corresponding flow resistance. The yield increasing and transformation operation in the oil field development process is to increase the radius of the fluid flow channel, so that the fluid which cannot flow in the original reservoir can flow freely in the large channel formed artificially, thereby improving the yield and the recovery rate. However, in the process of the production increase and transformation operation, the polymer material injected along with the well entering fluid can adhere to the surface of the rock through the action of the polymer material and the rock, particularly polymer molecular chains are intertwined to form an aggregation group, the radius of a reservoir channel or a fracturing crack is reduced, the channel is blocked under severe conditions, the flowing capacity of the fluid is reduced, and the production increase and transformation effect is reduced. From the start of fracturing construction in field application, the damage of well fluid to a reservoir channel is always focused, and related researches are carried out. For example: many low-damage fracturing fluid systems have been developed, some of which are made by reducing the molecular weight of the viscosifier in the well fluid; it is known to reduce the molecular weight of the thickener by adding a corresponding breaker. The invention patent CN 111040752A discloses a low-adsorption fracturing fluid system and a preparation method thereof, and the invention reduces the reduction effect of a thickening agent on the channel size by reducing the adsorption effect of the thickening agent on the rock surface, and only can the molecular weight reach a certain low limit value by using a low-molecular-weight thickening agent or adopting a corresponding gel breaker method, so that the blocking effect of the thickening agent on the channel is reduced to a certain value, but the molecular chain of the thickening agent contains a large number of hydrophilic groups which inevitably react with the rock, and the adsorption retention of the thickening agent on the rock surface still exists. The granular nano material adopted in the technical scheme preferentially occupies the surface of the rock, reduces the adsorption effect of the thickener on the rock, but the granular surfactant has smaller particles, limited surface of the covered rock and less adsorption quantity.
3. The invention comprises the following steps:
the invention aims to solve the technical problems that: according to the development condition of the prior guar gum fracturing fluid and the problems existing in the prior art, the invention provides the fracturing fluid capable of effectively reducing the adsorption of the guar gum on the rock surface and the preparation method thereof. The modified graphene oxide in the fracturing fluid prepared by the invention has a larger surface area, can occupy the rock surface preferentially, and reduces the adhesion of the polymer material entering the well on the rock surface to the greatest extent, so that the blockage of the radius of the channel between the rocks after the yield-increasing reconstruction operation can be avoided, and the flowing capacity of the oil-gas fluid is greatly increased.
In order to solve the problems, the invention adopts the following technical scheme:
the invention provides a fracturing fluid capable of effectively reducing adsorption of guanidine gum on the surface of rock, which takes 100mL of water as a reference, and comprises the following components in percentage by mass: 0.2 to 0.7 percent of guanidine gum, 0.1 to 0.5 percent of modified graphene oxide, 0.05 to 0.1 percent of cleanup additive, 0.5 to 3 percent of clay stabilizer, 0.05 to 0.15 percent of pH regulator and 0.1 to 0.3 percent of cross-linking agent;
the guanidine gum is at least one of guanidine collagen powder, hydroxypropyl guanidine gum and carboxymethyl guanidine gum, the cleanup additive is perfluoro nonylphenol polyoxyethylene ether, the clay stabilizer is potassium chloride, the pH regulator is sodium carbonate, and the cross-linking agent is 25% sodium tetraborate aqueous solution.
According to the fracturing fluid capable of effectively reducing adsorption of the guanidine gum on the surface of the rock, the modified graphene oxide is prepared by grafting 2- (((2-hydroxyethyl) amino) methyl) succinic acid on the surface of the graphene oxide.
According to the fracturing fluid capable of effectively reducing adsorption of guanidine gum on the rock surface, the specific preparation method of the modified graphene comprises the following steps: dispersing graphene oxide in diethyl ether by ultrasonic waves, then adding sodium ethoxide, and dropwise adding 2- (((2-hydroxyethyl) amino) methyl) succinic acid; stirring at 40 ℃ after the dripping is finished until no water is generated in the water separator; and filtering and drying the obtained liquid to obtain the modified graphene oxide.
The mass ratio between the graphene oxide and the 2- (((2-hydroxyethyl) amino) methyl) succinic acid is 2-5: 1, a step of; the mass ratio of the graphene oxide to the diethyl ether is 1: 30-50; the mass ratio of the graphene oxide to the sodium ethoxide is 100-200: 1.
according to the fracturing fluid capable of effectively reducing adsorption of guanidine gum on the rock surface, the CAS of 2- (((2-hydroxyethyl) amino) methyl) succinic acid is 1883349-62-9.
According to the fracturing fluid capable of effectively reducing adsorption of guanidine gum on the rock surface, the perfluorononylphenol polyoxyethylene ether is provided by Zhengzhou Yi and Fine chemicals Co.
In addition, a preparation method of the fracturing fluid for effectively reducing adsorption of guanidine gum on the rock surface is provided, and the preparation method comprises the following steps:
a. weighing various raw materials according to the proportion of the fracturing fluid, adding the weighed clay stabilizer into water, and then slowly adding the guanidine gum and stirring uniformly until the guanidine gum is completely dispersed; then adding modified graphene oxide, stirring and dispersing uniformly, and then adding a cleanup additive and mixing uniformly to obtain fracturing fluid base fluid which effectively reduces adsorption of guanidine gum on the rock surface;
b. and d, adding a pH regulator and a cross-linking agent into the fracturing fluid base fluid obtained in the step a, and uniformly stirring to obtain the fracturing fluid capable of effectively reducing adsorption of the guanidine gum on the rock surface.
The principle of reducing damage to a reservoir pore canal by the fracturing fluid is as follows: the fracturing fluid thickener is adhered to the surface of rock through hydrophilic groups on molecular chains, and after the thickener molecules are adhered, a bulk structure is formed due to the curling action of macromolecular chains of the thickener, and the bulk structure blocks pore channels and influences the flow capacity of the pore channels. In order to reduce the adhesion of thickener molecules to the rock surface, the effort to break the thickener and the rock is critical. The surface of the graphene oxide has fewer hydroxyl groups and carboxyl groups, and 2- (((2-hydroxyethyl) amino) methyl) succinic acid is grafted to the surface of the graphene, so that the number of hydrophilic groups on the surface of the graphene oxide is increased, the hydrophilic groups grafted on the graphene oxide can be attached to the surface of the rock through chemical bonds, occupy the sites on the surface of the rock, and prevent the thickener in the fracturing fluid from being attached to the surface of the rock. The thickness of the modified graphene oxide is only 1-2 nm, so that the diameter of a rock pore canal is not reduced, and the flow capacity of fluid is not affected. Because the surface area of the modified graphene oxide is large, the modified graphene oxide can cover the rock Dan Biaomian to the greatest extent, the covering efficiency is far higher than that of the granular nano material, and after the surface of the rock is completely covered by the modified graphene oxide, the adsorption of the fracturing fluid thickener on the surface of the rock is almost isolated, and the aggregation and blockage of the thickener on the surface of the rock are avoided. The hydrophilic groups act among the thickener molecules to form a large number of group-shaped structures, the group-shaped structures weaken the flowing capability of fluid, hydrophilic groups on the modified graphene oxide interact with the molecules of the thickener in the system, and the large volume of the graphene oxide relative to the molecular chain of the thickener prevents the thickener molecules from approaching to form aggregation groups, so that the phenomenon that the thickener molecules block pore channels is avoided.
The invention has the positive beneficial effects that:
1. macromolecular compounds in the fracturing well fluid are retained in the rock pore channels, so that the pore channels can be blocked, and the flow capacity of the pore channels is reduced. The fracturing fluid system prepared by the invention can effectively reduce the adsorption retention of the logging high molecular compound on the rock surface and improve the flow capacity of the channel after transformation.
2. The modified graphene oxide in the fracturing fluid prepared by the invention has a larger surface area, can occupy the rock surface preferentially, and reduces the adhesion of the polymer material entering the well on the rock surface to the greatest extent, so that the blockage of the radius of the channel between the rocks after the yield-increasing reconstruction operation can be avoided, and the flowing capacity of the oil-gas fluid is greatly increased.
4. The specific embodiment is as follows:
the invention is further illustrated by the following examples, which are not intended to limit the scope of the invention.
The guanidine gum used in the following examples was at least one of guanidine collagen powder, hydroxypropyl guanidine gum and carboxymethyl guanidine gum, the cleanup additive was perfluorononylphenol polyoxyethylene ether (supplied by Zhengzhou Yi and Fine chemicals Co., ltd.), the clay stabilizer was potassium chloride, the pH regulator was sodium carbonate, and the crosslinking agent was 25% aqueous sodium tetraborate.
Example 1:
the fracturing fluid for effectively reducing the adsorption of the guanidine gum on the rock surface disclosed by the invention comprises the following components in percentage by mass based on 100mL of water: 0.4% of hydroxypropyl guanidine gum, 0.2% of modified graphene oxide, 0.05% of cleanup additive perfluorononylphenol polyoxyethylene ether, 1% of clay stabilizer potassium chloride, 0.1% of pH regulator sodium carbonate and 0.2% of cross-linking agent 25% of sodium tetraborate aqueous solution.
The specific preparation process of the modified graphene oxide comprises the following steps: 2g of graphene oxide is put into a three-neck flask, 60ml of diethyl ether is added, and ultrasonic dispersion is carried out for 20min; after the graphene oxide is completely dispersed, 0.01g of sodium ethoxide is added, a condensation pipe containing a water separator is connected on a flask, the flask is heated to 40 ℃, 1g of 2- (((2-hydroxyethyl) amino) methyl) succinic acid (CAS is 1883349-62-9) is added dropwise by a dropping funnel, and stirring is carried out after the dropwise addition until no water is generated in the water separator; and filtering and drying the liquid in the flask to obtain the modified graphene oxide.
The preparation method of the fracturing fluid for effectively reducing adsorption of guanidine gum on the rock surface disclosed by the embodiment 1 of the invention comprises the following steps:
a. preparing various raw materials according to the proportioning proportion of the fracturing fluid in the embodiment 1, adding 1g of the weighed clay stabilizer into 100ml of water, then slowly adding 0.4g of hydroxypropyl guanidine gum, stirring uniformly until the guanidine gum is completely dispersed, then adding 0.2g of modified graphene oxide, stirring uniformly dispersed, and then adding 0.05g of cleanup additive, namely perfluorononylphenol polyoxyethylene ether, and mixing uniformly to obtain a fracturing fluid base fluid capable of effectively reducing adsorption of the guanidine gum on the rock surface;
b. and d, adding 0.1g of sodium carbonate and 0.2g of 25% sodium tetraborate aqueous solution serving as a cross-linking agent serving as a pH regulator into the base solution obtained in the step a, and uniformly stirring to obtain the fracturing fluid gel capable of effectively reducing adsorption of the guanidine gum on the rock surface.
Example 2:
the fracturing fluid for effectively reducing the adsorption of the guanidine gum on the rock surface disclosed by the invention comprises the following components in percentage by mass based on 100mL of water: 0.25% of hydroxypropyl guanidine gum, 0.4% of modified graphene oxide, 0.06% of cleanup additive perfluorononylphenol polyoxyethylene ether, 1% of clay stabilizer potassium chloride, 0.08% of pH regulator sodium carbonate and 0.2% of cross-linking agent 25% of sodium tetraborate aqueous solution.
The specific preparation process of the modified graphene oxide comprises the following steps: putting 5g of graphene oxide into a three-neck flask, adding 250ml of diethyl ether, and performing ultrasonic dispersion for 20min; after the graphene oxide is completely dispersed, 0.03g of sodium ethoxide is added, a condensation pipe containing a water separator is connected on a flask, the flask is heated to 40 ℃, 1g of 2- (((2-hydroxyethyl) amino) methyl) succinic acid (CAS is 1883349-62-9) is added dropwise by a dropping funnel, and stirring is carried out after the dropwise addition until no water is generated in the water separator; and filtering and drying the liquid obtained in the flask to obtain the modified graphene oxide after drying.
The preparation method of the fracturing fluid for effectively reducing adsorption of guanidine gum on the rock surface disclosed by the embodiment 2 of the invention comprises the following steps:
a. preparing various raw materials according to the proportion of the fracturing fluid in the embodiment 2, adding 1g of prepared clay stabilizer potassium chloride into 100ml of water, slowly adding 0.25g of hydroxypropyl guanidine gum, and uniformly stirring until the guanidine gum is completely dispersed; then adding 0.4g of the modified graphene oxide, stirring and dispersing uniformly, and then adding 0.06g of the cleanup additive, namely perfluorononylphenol polyoxyethylene ether, and mixing uniformly to obtain a fracturing fluid base fluid which effectively reduces the adsorption of guanidine gum on the rock surface;
b. and d, adding 0.08g of sodium carbonate and 0.2g of sodium tetraborate aqueous solution with 25% of cross-linking agent into the base solution obtained in the step a, and uniformly stirring to obtain the fracturing fluid gel capable of effectively reducing adsorption of the guanidine gum on the rock surface.
Example 3:
the fracturing fluid for effectively reducing the adsorption of the guanidine gum on the rock surface disclosed by the invention comprises the following components in percentage by mass based on 100mL of water: 0.7% of hydroxypropyl guanidine gum, 0.5% of modified graphene oxide, 0.1% of cleanup additive perfluorononylphenol polyoxyethylene ether, 3% of clay stabilizer potassium chloride, 0.15% of pH regulator sodium carbonate and 0.3% of cross-linking agent 25% of sodium tetraborate aqueous solution.
The specific preparation process of the modified graphene oxide is the same as that of example 1.
The preparation method of the fracturing fluid for effectively reducing adsorption of guanidine gum on the rock surface disclosed by the embodiment 3 of the invention comprises the following steps:
a. preparing various raw materials according to the proportion of the fracturing fluid in the embodiment 3, adding 3g of prepared clay stabilizer potassium chloride into 100ml of water, slowly adding 0.7g of hydroxypropyl guanidine gum, and uniformly stirring until the guanidine gum is completely dispersed; then adding 0.5g of the modified graphene oxide, stirring and dispersing uniformly, and then adding 0.1g of perfluoro nonylphenol polyoxyethylene ether as a cleanup additive, and mixing uniformly to obtain a fracturing fluid base fluid which effectively reduces adsorption of guanidine gum on the rock surface;
b. and d, adding 0.15g of sodium carbonate and 0.3g of 25% sodium tetraborate aqueous solution of a cross-linking agent into the base solution obtained in the step a, and uniformly stirring to obtain the fracturing fluid gel capable of effectively reducing adsorption of the guanidine gum on the rock surface.
Example 4:
the fracturing fluid for effectively reducing the adsorption of the guanidine gum on the rock surface disclosed by the invention comprises the following components in percentage by mass based on 100mL of water: 0.2% of hydroxypropyl guanidine gum, 0.1% of modified graphene oxide, 0.05% of cleanup additive perfluorononylphenol polyoxyethylene ether, 0.5% of clay stabilizer potassium chloride, 0.05% of pH regulator sodium carbonate and 0.1% of cross-linking agent 25% of sodium tetraborate aqueous solution.
The specific preparation process of the modified graphene oxide is the same as that of example 2.
The preparation method of the fracturing fluid for effectively reducing adsorption of guanidine gum on the rock surface disclosed by the embodiment 4 of the invention comprises the following steps:
a. preparing various raw materials according to the proportioning proportion of the fracturing fluid described in the example 4, adding 0.5g of prepared clay stabilizer and 0.2g of hydroxypropyl guanidine gum into 100ml of water, and stirring uniformly until the guanidine gum is completely dispersed; then adding 0.1g of the obtained modified graphene oxide, stirring and dispersing uniformly, and then adding 0.05g of perfluoro nonylphenol polyoxyethylene ether as a cleanup additive, and mixing uniformly to obtain a fracturing fluid base fluid which effectively reduces adsorption of guanidine gum on the rock surface;
b. and d, adding 0.05g of sodium carbonate and 0.1g of sodium tetraborate aqueous solution with 25% of cross-linking agent serving as pH regulator into the base solution obtained in the step a, and uniformly stirring to obtain the fracturing fluid gel capable of effectively reducing adsorption of the guanidine gum on the rock surface.
According to the standard SY/T5107-2016 water-based fracturing fluid liquid evaluation method, the fracturing fluids prepared in the embodiments 1-4 of the invention are subjected to relevant performance tests, and the test results are shown in Table 1.
Table 1 the fracturing fluid prepared in examples 1 to 4 of the present invention was tested for the relevant properties
Note that: the fracturing fluid formulation without modified graphene oxide in table 1 was the same as in example 1, except that modified graphene oxide was not added.
As can be seen from the test results in Table 1, the damage to the core of the invention in examples 1 to 4 is significantly smaller than that of the unmodified graphene formulation.
Claims (6)
1. The fracturing fluid for effectively reducing the adsorption of the guanidine gum on the rock surface is characterized in that 100mL of water is taken as a reference, and the fracturing fluid comprises the following components in percentage by mass: 0.2 to 0.7 percent of guanidine gum, 0.1 to 0.5 percent of modified graphene oxide, 0.05 to 0.1 percent of cleanup additive, 0.5 to 3 percent of clay stabilizer, 0.05 to 0.15 percent of pH regulator and 0.1 to 0.3 percent of cross-linking agent;
the guanidine gum is at least one of guanidine collagen powder, hydroxypropyl guanidine gum and carboxymethyl guanidine gum, the cleanup additive is perfluoro nonylphenol polyoxyethylene ether, the clay stabilizer is potassium chloride, the pH regulator is sodium carbonate, and the cross-linking agent is 25% sodium tetraborate aqueous solution.
2. The fracturing fluid for effectively reducing adsorption of guanidine gum on the surface of rock according to claim 1, wherein the fracturing fluid is characterized in that: the modified graphene oxide is prepared by grafting 2- (((2-hydroxyethyl) amino) methyl) succinic acid on the surface of graphene oxide.
3. The fracturing fluid for effectively reducing adsorption of guanidine gum on the surface of rock according to claim 2, wherein the specific preparation method of the modified graphene is as follows: dispersing graphene oxide in diethyl ether by ultrasonic waves, then adding sodium ethoxide, and dropwise adding 2- (((2-hydroxyethyl) amino) methyl) succinic acid; stirring at 40 ℃ after the dripping is finished until no water is generated in the water separator; and filtering and drying the obtained liquid to obtain the modified graphene oxide.
The mass ratio between the graphene oxide and the 2- (((2-hydroxyethyl) amino) methyl) succinic acid is 2-5: 1, a step of; the mass ratio of the graphene oxide to the diethyl ether is 1: 30-50; the mass ratio of the graphene oxide to the sodium ethoxide is 100-200: 1.
4. a fracturing fluid effective for reducing adsorption of guanidine gum on rock surfaces according to claim 2 or 3, wherein: the CAS of 2- (((2-hydroxyethyl) amino) methyl) succinic acid is 1883349-62-9.
5. The fracturing fluid for effectively reducing adsorption of guanidine gum on the surface of rock according to claim 1, wherein the fracturing fluid is characterized in that: the perfluorononylphenol polyoxyethylene ether is provided by Zhengzhou Yi and Fine chemicals Co.
6. The preparation method of the fracturing fluid for effectively reducing adsorption of the guanidine gum on the rock surface is characterized by comprising the following steps of:
a. weighing various raw materials according to the proportion of the fracturing fluid according to claim 1, adding the weighed clay stabilizer into water, then slowly adding the guanidine gum, and stirring uniformly until the guanidine gum is completely dispersed; then adding modified graphene oxide, stirring and dispersing uniformly, and then adding a cleanup additive and mixing uniformly to obtain fracturing fluid base fluid which effectively reduces adsorption of guanidine gum on the rock surface;
b. and d, adding a pH regulator and a cross-linking agent into the fracturing fluid base fluid obtained in the step a, and uniformly stirring to obtain the fracturing fluid capable of effectively reducing adsorption of the guanidine gum on the rock surface.
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20160052868A1 (en) * | 2008-04-17 | 2016-02-25 | Thomas P. Daly | Biological buffers with wide buffering ranges |
| CN106215234A (en) * | 2016-07-27 | 2016-12-14 | 西南科技大学 | The preparation method of graphene oxide Chitosan Composites |
| CN108084984A (en) * | 2017-12-05 | 2018-05-29 | 西南石油大学 | A kind of agent for releasing for reducing guanidine gum fracturing fluid and being injured in sandstone reservoir |
| CN111040752A (en) * | 2018-10-11 | 2020-04-21 | 中国石油化工股份有限公司 | Low-adsorption fracturing fluid system and preparation method thereof |
| CN111925470A (en) * | 2019-05-13 | 2020-11-13 | 中国石油化工股份有限公司 | Graphene/polymer ultra-low permeability film-forming agent for shale gas water-based drilling fluid and preparation method thereof |
| CN113265235A (en) * | 2020-02-14 | 2021-08-17 | 中国石油天然气股份有限公司 | Modified graphene oxide hybrid guar gum fracturing fluid system and preparation method thereof |
-
2022
- 2022-12-12 CN CN202211591075.2A patent/CN116218504A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20160052868A1 (en) * | 2008-04-17 | 2016-02-25 | Thomas P. Daly | Biological buffers with wide buffering ranges |
| CN106215234A (en) * | 2016-07-27 | 2016-12-14 | 西南科技大学 | The preparation method of graphene oxide Chitosan Composites |
| CN108084984A (en) * | 2017-12-05 | 2018-05-29 | 西南石油大学 | A kind of agent for releasing for reducing guanidine gum fracturing fluid and being injured in sandstone reservoir |
| CN111040752A (en) * | 2018-10-11 | 2020-04-21 | 中国石油化工股份有限公司 | Low-adsorption fracturing fluid system and preparation method thereof |
| CN111925470A (en) * | 2019-05-13 | 2020-11-13 | 中国石油化工股份有限公司 | Graphene/polymer ultra-low permeability film-forming agent for shale gas water-based drilling fluid and preparation method thereof |
| CN113265235A (en) * | 2020-02-14 | 2021-08-17 | 中国石油天然气股份有限公司 | Modified graphene oxide hybrid guar gum fracturing fluid system and preparation method thereof |
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