CN115926771B - Self-breaking modified soap kernel glue fracturing fluid and use method thereof - Google Patents
Self-breaking modified soap kernel glue fracturing fluid and use method thereof Download PDFInfo
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- 239000012530 fluid Substances 0.000 title claims abstract description 98
- 239000000344 soap Substances 0.000 title claims abstract description 47
- 238000000034 method Methods 0.000 title claims abstract description 21
- 239000003292 glue Substances 0.000 title claims abstract description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 25
- 238000010276 construction Methods 0.000 claims abstract description 22
- 239000000843 powder Substances 0.000 claims abstract description 21
- 230000007062 hydrolysis Effects 0.000 claims abstract description 20
- 238000006460 hydrolysis reaction Methods 0.000 claims abstract description 20
- 239000004927 clay Substances 0.000 claims abstract description 18
- 239000003381 stabilizer Substances 0.000 claims abstract description 17
- 239000003054 catalyst Substances 0.000 claims abstract description 16
- 239000000654 additive Substances 0.000 claims abstract description 15
- 230000000996 additive effect Effects 0.000 claims abstract description 14
- 230000000844 anti-bacterial effect Effects 0.000 claims abstract description 14
- 230000002421 anti-septic effect Effects 0.000 claims abstract description 14
- 239000003899 bactericide agent Substances 0.000 claims abstract description 14
- 239000003431 cross linking reagent Substances 0.000 claims abstract description 14
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 18
- 238000003756 stirring Methods 0.000 claims description 17
- 239000003795 chemical substances by application Substances 0.000 claims description 9
- 238000002360 preparation method Methods 0.000 claims description 9
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 9
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonia chloride Chemical compound [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 claims description 8
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 6
- 102000008186 Collagen Human genes 0.000 claims description 6
- 108010035532 Collagen Proteins 0.000 claims description 6
- 238000006243 chemical reaction Methods 0.000 claims description 6
- 229920001436 collagen Polymers 0.000 claims description 6
- 239000007787 solid Substances 0.000 claims description 6
- PUVAFTRIIUSGLK-UHFFFAOYSA-M trimethyl(oxiran-2-ylmethyl)azanium;chloride Chemical compound [Cl-].C[N+](C)(C)CC1CO1 PUVAFTRIIUSGLK-UHFFFAOYSA-M 0.000 claims description 6
- -1 diisopropyl titanate Chemical compound 0.000 claims description 5
- 235000019270 ammonium chloride Nutrition 0.000 claims description 4
- 238000001914 filtration Methods 0.000 claims description 4
- 229920003145 methacrylic acid copolymer Polymers 0.000 claims description 4
- 229940117841 methacrylic acid copolymer Drugs 0.000 claims description 4
- 125000005010 perfluoroalkyl group Chemical group 0.000 claims description 4
- IRAGEBXSFXWYNX-UHFFFAOYSA-N 2-(1,3,5-triazinan-1-yl)ethanol Chemical compound OCCN1CNCNC1 IRAGEBXSFXWYNX-UHFFFAOYSA-N 0.000 claims description 3
- UMJJNXFVAMHNIE-UHFFFAOYSA-N ClCC[Na] Chemical compound ClCC[Na] UMJJNXFVAMHNIE-UHFFFAOYSA-N 0.000 claims description 3
- 238000001816 cooling Methods 0.000 claims description 3
- 238000004132 cross linking Methods 0.000 claims description 3
- PGQAXGHQYGXVDC-UHFFFAOYSA-N dodecyl(dimethyl)azanium;chloride Chemical compound Cl.CCCCCCCCCCCCN(C)C PGQAXGHQYGXVDC-UHFFFAOYSA-N 0.000 claims description 3
- 238000001035 drying Methods 0.000 claims description 3
- 238000000227 grinding Methods 0.000 claims description 3
- 229910052757 nitrogen Inorganic materials 0.000 claims description 3
- BVIXLMYIFZGRBH-UHFFFAOYSA-M sodium;2-chloroethanesulfonate Chemical compound [Na+].[O-]S(=O)(=O)CCCl BVIXLMYIFZGRBH-UHFFFAOYSA-M 0.000 claims description 3
- BDHFUVZGWQCTTF-UHFFFAOYSA-M sulfonate Chemical compound [O-]S(=O)=O BDHFUVZGWQCTTF-UHFFFAOYSA-M 0.000 claims description 3
- CIWAOCMKRKRDME-UHFFFAOYSA-N tetrasodium dioxido-oxo-stibonatooxy-lambda5-stibane Chemical compound [Na+].[Na+].[Na+].[Na+].[O-][Sb]([O-])(=O)O[Sb]([O-])([O-])=O CIWAOCMKRKRDME-UHFFFAOYSA-N 0.000 claims description 3
- 238000005406 washing Methods 0.000 claims description 3
- 239000002253 acid Substances 0.000 claims description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 2
- 150000001875 compounds Chemical class 0.000 claims description 2
- 229910017053 inorganic salt Inorganic materials 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims description 2
- 239000001301 oxygen Substances 0.000 claims description 2
- 229910052760 oxygen Inorganic materials 0.000 claims description 2
- 229920000642 polymer Polymers 0.000 claims description 2
- 239000002994 raw material Substances 0.000 claims 1
- 239000004576 sand Substances 0.000 abstract description 6
- 150000003384 small molecules Chemical class 0.000 abstract description 3
- 239000007788 liquid Substances 0.000 description 15
- 238000012360 testing method Methods 0.000 description 8
- ROOXNKNUYICQNP-UHFFFAOYSA-N ammonium persulfate Chemical compound [NH4+].[NH4+].[O-]S(=O)(=O)OOS([O-])(=O)=O ROOXNKNUYICQNP-UHFFFAOYSA-N 0.000 description 6
- 239000007789 gas Substances 0.000 description 5
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 4
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000002156 mixing Methods 0.000 description 4
- 239000003921 oil Substances 0.000 description 4
- 238000011056 performance test Methods 0.000 description 4
- 230000001105 regulatory effect Effects 0.000 description 4
- 229910001870 ammonium persulfate Inorganic materials 0.000 description 3
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- WQZGKKKJIJFFOK-GASJEMHNSA-N Glucose Natural products OC[C@H]1OC(O)[C@H](O)[C@@H](O)[C@@H]1O WQZGKKKJIJFFOK-GASJEMHNSA-N 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000002775 capsule Substances 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 239000008103 glucose Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 238000000967 suction filtration Methods 0.000 description 2
- 230000002378 acidificating effect Effects 0.000 description 1
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- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000000413 hydrolysate Substances 0.000 description 1
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- 230000001590 oxidative effect Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 239000003079 shale oil Substances 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 239000002562 thickening agent Substances 0.000 description 1
Abstract
The invention discloses a self-breaking modified soap kernel glue fracturing fluid and a use method thereof. The self-breaking modified soap kernel glue fracturing fluid is prepared from the following components in percentage by mass: 0.6 to 1 percent of modified soap kernel rubber powder, 0.1 to 0.4 percent of antiseptic and bactericide, 0.05 to 0.2 percent of cleanup additive, 0.2 to 0.4 percent of clay stabilizer, 0 to 0.5 percent of hydrolysis catalyst, 0.3 to 0.6 percent of cross-linking agent and the balance of water. The fracturing fluid can be rapidly hydrated and degraded into small molecules by high molecules in a high-temperature reservoir environment, and has the characteristics of controllable gel breaking time, strong sand carrying capacity, green and environment-friendly property and the like, so that the requirements of the existing fracturing construction are met.
Description
Technical Field
The invention relates to the technical field of hydraulic fracturing of oil and gas wells, in particular to self-breaking modified soap kernel gel type fracturing fluid and a use method thereof.
Background
In recent years, the global exploration and development force for unconventional oil and gas resources such as compact oil and gas, shale oil and gas and the like is increased year by year, and hydraulic fracturing has become a main means for developing the unconventional oil and gas resources. In the fracturing construction, the fracturing fluid plays an important role. The fracturing fluid with higher viscosity can fracture the fracture and carry the propping agent into the reservoir to prop the fracture, and after construction is completed, the fracturing fluid is broken into a low-viscosity broken gel and then is discharged back to the ground.
The conventional fracturing fluid gel breaking method is to add a gel breaker into the fracturing fluid from a sand mixing vehicle in construction, and the gel breaking mode mainly has the following defects: 1. the conventional breaker comprises ammonium persulfate, capsule breakers and the like, wherein the breakers are basically solid powder or particles, and the solid breakers are difficult to uniformly disperse in fracturing fluid and are extremely easy to agglomerate, so that phenomena of nonuniform breaking of the fracturing fluid, incomplete breaking of part of the fracturing fluid, high content of broken solution residues and the like are brought, and adverse consequences such as formation blockage, difficult flowback, poor fracturing effect and the like are finally caused; in particular for hypotonic reservoirs, the negative effects of this disadvantage are more pronounced. 2. The addition of the breaker is greatly influenced by human factors, construction progress conditions and the like, and external factors such as negligence and lackluster of constructors, too high construction pressure, damage to breaker adding instruments and the like can cause interruption of the addition of the breaker, so that the fracture fluid is broken by a tape to cause great uncertainty. 3. The strong oxidizing nature of the breaker can cause damage to the environment and the formation; the glue breaking liquid discharged after construction usually contains a large amount of residual glue breaking agent, which can bring about environmental pollution on one hand and difficulty in recycling and purifying the flowback liquid on the other hand.
Disclosure of Invention
The invention aims to overcome the problems in the prior art and provide a self-breaking modified soap kernel gel type fracturing fluid and a use method thereof. The fracturing fluid can be rapidly hydrated and degraded into small molecules by high molecules in a high-temperature reservoir environment, and has the characteristics of controllable gel breaking time, strong sand carrying capacity, green and environment-friendly property and the like, so that the requirements of the existing fracturing construction are met.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:
the self-breaking modified soap kernel glue fracturing fluid is characterized by being prepared from the following components in percentage by mass: 0.6 to 1 percent of modified soap kernel rubber powder, 0.1 to 0.4 percent of antiseptic and bactericide, 0.05 to 0.2 percent of cleanup additive, 0.2 to 0.4 percent of clay stabilizer, 0 to 0.5 percent of hydrolysis catalyst, 0.3 to 0.6 percent of cross-linking agent and the balance of water.
The preparation method of the modified soap kernel rubber powder comprises the following steps: adding soap kernel collagen powder into sodium carbonate solution, stirring uniformly, introducing nitrogen to remove oxygen, stirring in a constant-temperature water bath at 45-55 ℃ for 15-25min, adding 2-chloroethyl sodium sulfonate and 2, 3-epoxypropyl trimethyl ammonium chloride, and stirring for reaction for 6-8h; cooling and suction filtering after the reaction is finished, washing the filtered solid, suction filtering again, drying and grinding into powder to obtain the modified soap kernel gel.
In the preparation method of the modified soap kernel gel, the weight ratio of the soap kernel collagen powder is as follows: sodium carbonate solution: sodium 2-chloroethyl sulfonate: 2, 3-epoxypropyltrimethylammonium chloride=100: 350:10:15.
in the preparation method of the modified soap kernel gel, the mass percentage concentration of the sodium carbonate solution is 20%.
The antiseptic bactericide is a 75-78% hydroxyethyl hexahydro s-triazine solution or a 40% dodecyl dimethyl ammonium chloride solution or a mixture of the two according to any mass ratio.
The cleanup additive is perfluoroalkyl methacrylic acid copolymer.
The clay stabilizer is a compound solution of inorganic salt and cationic quaternary ammonium salt polymer clay stabilizer.
The clay stabilizer is prepared by dissolving 15% of ammonium chloride, 25% of polyepichlorohydrin-dimethylamine and water.
The cross-linking agent is a 20% by mass of ditriethanolamine diisopropyl titanate solution or a 15% by mass of sodium pyroantimonate solution.
The hydrolysis catalyst is inorganic strong acid.
The hydrolysis catalyst is concentrated hydrochloric acid with the mass fraction of 31% or sulfuric acid with the mass fraction of 42%.
The application method of the self-breaking modified soap kernel glue fracturing fluid is characterized by comprising the following steps of: sequentially adding water, modified soap kernel glue, antiseptic bactericide, cleanup additive and clay stabilizer according to a proportion, and uniformly stirring to prepare fracturing fluid base fluid; after the fracturing construction is started, simultaneously adding a fracturing fluid base fluid, a cross-linking agent, a hydrolysis catalyst and a construction setting amount of propping agent, uniformly stirring and cross-linking to form a mixed fluid of the propping agent and fracturing fluid gel, and injecting the mixed fluid into a stratum; closing the well for more than 30 minutes after construction is completed, waiting for the fracturing fluid to hydrolyze and break gel in a high-temperature underground environment, and then opening the well to open the hole for fluid discharge.
The invention has the advantages that:
(1) The fracturing fluid provided by the invention can be automatically hydrolyzed and broken under the high-temperature environment of a reservoir, and does not need to be added with breaker such as ammonium persulfate, capsules and the like, so that the procedure of adding breaker in the fracturing construction process is omitted, and the construction flow is simplified.
(2) Compared with the conventional method for manually adding solid gel breakers such as ammonium persulfate, the fracturing fluid provided by the invention has the advantages that gel breaking in a reservoir is more uniform and thorough, the content of residues is lower, the flowback effect after fracturing can be greatly improved, and the damage to the reservoir is reduced.
(3) The fracturing fluid provided by the invention has the advantages that the gel breaking performance is not influenced by external factors such as human factors, construction progress conditions and the like, and the use effect is stable.
(4) The main hydrolysate of the fracturing fluid provided by the invention is glucose, which can be dissolved in water so as not to block a reservoir; and the glue breaking liquid is discharged back to the ground, so that the environment is not polluted, no glue breaking agent is left, and the recycling is easier.
(5) The hydrolysis catalyst can adjust the hydrolysis gel breaking speed of the fracturing fluid in the reservoir, so that the gel breaking time of the fracturing fluid is controllable.
In conclusion, the novel fracturing fluid is obtained by utilizing the characteristic that the plant gum thickener soap kernel gum is easy to hydrolyze and degrade at high temperature and in an acidic environment and modifying the soap kernel gum and optimizing corresponding additives, the fracturing fluid can be rapidly hydrated and degraded into small molecules from high molecules in a high-temperature environment of a reservoir, and the fracturing fluid also has the characteristics of controllable gum breaking time, strong sand carrying capacity, environment friendliness and the like, so that the requirements of the current fracturing construction are met.
Detailed Description
Example 1
The invention comprises a self-breaking modified soap kernel glue fracturing fluid which comprises the following components in percentage by mass: 0.6% of modified soap kernel rubber powder, 0.1% of antiseptic bactericide, 0.2% of cleanup additive, 0.4% of clay stabilizer, 0% of hydrolysis catalyst, 0.3% of cross-linking agent and the balance of water.
The self-breaking modified soap kernel gel type fracturing fluid is suitable for reservoirs with the temperature of 75-130 ℃, is easy to hydrolyze in a high-temperature environment, and the main product of hydrolysis is glucose.
The preparation method of the modified soap kernel rubber powder comprises the following steps: firstly, adding a sodium carbonate solution into a three-neck flask, then adding soap kernel collagen powder, uniformly stirring, and then introducing nitrogen to deoxidize; placing the three-neck flask into a constant-temperature water bath at 50 ℃ and stirring for 20min, then adding 2-chloroethyl sodium sulfonate and 2, 3-epoxypropyl trimethyl ammonium chloride, and stirring for reaction for 7h; and after the reaction is finished, taking out the three-neck flask from the water bath, cooling, carrying out suction filtration, washing the filtered solid with ethanol, carrying out suction filtration again, drying and grinding into powder to obtain the modified soap kernel rubber powder.
In the preparation method of the modified soap kernel gel, the weight ratio of the soap kernel collagen powder is as follows: sodium carbonate solution: sodium 2-chloroethyl sulfonate: 2, 3-epoxypropyltrimethylammonium chloride=100: 350:10:15. the mass percentage concentration of the sodium carbonate solution is 20%.
The antiseptic bactericide is a 75% hydroxyethyl hexahydro s-triazine solution. The cleanup additive is perfluoroalkyl methacrylic acid copolymer. The clay stabilizer is prepared by dissolving 15% of ammonium chloride, 25% of polyepichlorohydrin-dimethylamine and water. The cross-linking agent is a ditriethanolamine diisopropyl titanate solution with the mass fraction of 20%.
The hydrolysis catalyst is concentrated hydrochloric acid with the mass fraction of 31%. The hydrolysis catalyst can adjust the hydrolysis gel breaking time of the fracturing fluid in the reservoir according to the requirement, so that the hydrolysis gel breaking time is controlled within the range of 1.5-4 h.
The preparation method of the fracturing fluid comprises the following steps:
S 1 preparing a base solution; 493.5g of water is added into a stirrer, the rotating speed of the stirrer is regulated to 1500r/min, 3g of soap kernel rubber powder, 0.5g of antiseptic bactericide, 1g of cleanup additive and 2g of clay stabilizer are sequentially added into the water, and stirring is continued for 5min to prepare a base solution, and the base solution is put into a beaker for standby.
S 2 Preparing fracturing fluid gel: pouring 400ml of base liquid into a stirrer, regulating the rotation speed of the stirrer to enable the liquid level to form vortex until the vortex formed by the liquid can see the top end of the central shaft of a blade of the stirrer, and enabling the stirrer to rotate at a constant speed; and adding 1.2g of cross-linking agent until the vortex gradually disappears, thus preparing the fracturing fluid gel.
In the fracturing construction, the using method of the fracturing fluid comprises the following steps: sequentially adding water, modified soap kernel glue, antiseptic bactericide, cleanup additive and clay stabilizer into a mixing vehicle according to a proportion, stirring uniformly, preparing fracturing fluid base fluid, and storing in a tank for later use; after the fracturing construction is started, simultaneously adding the fracturing fluid base fluid, the cross-linking agent, the hydrolysis catalyst and the propping agent with the construction design addition into a sand mixing pool of a sand mixing vehicle, uniformly stirring and cross-linking to form a mixed fluid of the propping agent and the fracturing fluid gel, and injecting the mixed fluid into a stratum through a fracturing pump; closing the well for more than 30 minutes after construction is completed, waiting for the fracturing fluid to hydrolyze and break gel in a high-temperature underground environment, and then opening the well to open the hole for fluid discharge.
The apparent viscosity of the base fluid prepared by the method, the gel breaking performance of the fracturing fluid gel and the content of gel breaking residue are tested, and the method is specifically as follows:
base fluid apparent viscosity test: taking 350mL of the base solution prepared in the steps, placing the base solution into a constant-temperature water bath with the temperature of 30 ℃ for 4 hours, and measuring the rotating speed of 100r/min and the shearing rate of 170s by using a six-speed rotational viscometer -1 Viscosity of the base fluid. The base fluid viscosity of the present fracturing fluid was measured to be 42mpa.s.
Gel breaking performance test:
1. gel breaking time: 100mL of the fracturing fluid gel prepared in the steps is transferred into a closed container and put into a constant-temperature water bath kettle for gel breaking, and the constant temperature is 80 ℃. The viscosity of the gel-breaking solution was measured at 30℃with a Brookfield capillary viscometer at different times. And (3) plotting the time as an abscissa and the viscosity of the gel breaking liquid as an ordinate, and reading the constant temperature time when the viscosity of the gel breaking liquid is 5 mPa.s from the plot to obtain the gel breaking time of the fracturing liquid.
2. Viscosity of the gel breaking solution: breaking gel of the fracturing fluid at 80 ℃ for 5 hours according to the method of the step 1 to thoroughly break the gel, and testing the viscosity of the fracturing fluid at 30 ℃ by using a capillary viscometer to obtain the viscosity of the breaking gel of the fracturing fluid.
3. Surface interfacial tension: the interfacial tension of the gel breaking liquid surface was measured according to the method used in SY/T5107-2016 Water-based fracturing liquid evaluation method 7.9.3.
The results of the gel breaking performance test are shown in the following table:
| gel breaking time (min) | Viscosity of gel breaking solution (mPa.s) | Surface tension (mN/m) | Interfacial tension (mN/m) |
| 225 | 2.13 | 20.327 | 0.348 |
And (3) testing the content of gel breaking solution residues: the content of the broken glue residue of the fracturing fluid is 56mg/L which is far lower than 600 mg/L required by the standard according to the centrifugal method test of the SY/T5107-2016 water-based fracturing fluid liquid evaluation method, 7.10.
Example 2
The invention comprises a self-breaking modified soap kernel glue fracturing fluid which comprises the following components in percentage by mass: 1% of modified soap kernel rubber powder, 0.4% of antiseptic bactericide, 0.05% of cleanup additive, 0.2% of clay stabilizer, 0.5% of hydrolysis catalyst, 0.6% of cross-linking agent and the balance of water.
The preparation method of the modified soap kernel gel is the same as that of the embodiment 1, and the description thereof is omitted.
The antiseptic bactericide is dodecyl dimethyl ammonium chloride solution with the mass fraction of 40%. The cleanup additive is perfluoroalkyl methacrylic acid copolymer. The clay stabilizer is prepared by dissolving 15% of ammonium chloride, 25% of polyepichlorohydrin-dimethylamine and water. The cross-linking agent is sodium pyroantimonate solution with the mass fraction of 15%. The hydrolysis catalyst is sulfuric acid with the mass fraction of 42%.
The preparation method of the fracturing fluid comprises the following steps:
S 1 preparing a base solution; adding 491.75g of water into a stirrer, regulating the rotation speed of the stirrer to 1500r/min, adding 5g of soap kernel rubber powder, 2g of antiseptic bactericide, 0.25g of cleanup additive and 1g of clay stabilizerSequentially adding into water, stirring for 5min to obtain base solution, and placing into a beaker for use.
S 2 Preparing fracturing fluid gel: pouring 400ml of base liquid into a stirrer, regulating the rotation speed of the stirrer to enable the liquid level to form vortex until the vortex formed by the liquid can see the top end of the central shaft of a blade of the stirrer, and enabling the stirrer to rotate at a constant speed; then adding 2g of hydrolysis catalyst and 2.4g of cross-linking agent until the vortex gradually disappears, and preparing the fracturing fluid gel.
The method of using the fracturing fluid is the same as that of example 1, and will not be described here again.
The apparent viscosity of the base fluid prepared by the method, the gel breaking performance of the fracturing fluid gel and the content of gel breaking residue are tested, and the method is specifically as follows:
base fluid apparent viscosity test: the base fluid viscosity of the present fracturing fluid was measured to be 68mpa.s using the base fluid apparent viscosity test method of example 1.
Gel breaking performance test: the gel breaking performance of the fracturing fluid measured by the gel breaking performance test method of the fracturing fluid gel in the embodiment 1 is as follows:
| gel breaking time (min) | Viscosity of gel breaking solution (mPa.s) | Surface tension (mN/m) | Interfacial tension (mN/m) |
| 118 | 1.41 | 24.715 | 0.577 |
And (3) testing the content of gel breaking solution residues: the method for testing the content of the broken glue residue in the embodiment 1 is used for testing that the broken glue residue content of the fracturing fluid is 48mg/L, which is far lower than 600 mg/L required by the standard.
In view of the foregoing, it will be appreciated by those skilled in the art that, after reading the present specification, various other modifications can be made in accordance with the technical scheme and concepts of the present invention without the need for creative mental efforts, and the modifications are within the scope of the present invention.
Claims (7)
1. The self-breaking modified soap kernel glue fracturing fluid is characterized by being prepared from the following components in percentage by mass: 0.6 to 1 percent of modified soap kernel rubber powder, 0.1 to 0.4 percent of antiseptic and bactericide, 0.05 to 0.2 percent of cleanup additive, 0.2 to 0.4 percent of clay stabilizer, 0 to 0.5 percent of hydrolysis catalyst, 0.3 to 0.6 percent of cross-linking agent and the balance of water; the raw materials of the modified soap kernel glue and the added weight proportion are soap kernel collagen powder: sodium carbonate solution: sodium 2-chloroethyl sulfonate: 2, 3-epoxypropyltrimethylammonium chloride=100: 350:10:15; the mass percentage concentration of the sodium carbonate solution is 20%; the cross-linking agent is a ditriethanolamine diisopropyl titanate solution with the mass fraction of 20% or a sodium pyroantimonate solution with the mass fraction of 15%; the hydrolysis catalyst is inorganic strong acid.
2. The self-breaking modified soap kernel gel type fracturing fluid according to claim 1, wherein the fracturing fluid is characterized in that: the preparation method of the modified soap kernel rubber powder comprises the following steps: adding soap kernel collagen powder into sodium carbonate solution, stirring uniformly, introducing nitrogen to remove oxygen, stirring in a constant-temperature water bath at 45-55 ℃ for 15-25min, adding 2-chloroethyl sodium sulfonate and 2, 3-epoxypropyl trimethyl ammonium chloride, and stirring for reaction for 6-8h; cooling and suction filtering after the reaction is finished, washing the filtered solid, suction filtering again, drying and grinding into powder to obtain the modified soap kernel gel.
3. The self-breaking modified soap kernel gel type fracturing fluid according to claim 2, wherein: the antiseptic bactericide is a 75-78% hydroxyethyl hexahydro s-triazine solution or a 40% dodecyl dimethyl ammonium chloride solution or a mixture of the two according to any mass ratio.
4. The self-breaking modified soap kernel gel type fracturing fluid according to claim 3, wherein: the cleanup additive is perfluoroalkyl methacrylic acid copolymer.
5. The self-breaking modified soap kernel gel type fracturing fluid according to claim 4, wherein the fracturing fluid is characterized in that: the clay stabilizer is a compound solution of inorganic salt and cationic quaternary ammonium salt polymer clay stabilizer.
6. The self-breaking modified soap kernel gel type fracturing fluid according to claim 5, wherein the fracturing fluid is characterized in that: the clay stabilizer is prepared by dissolving 15% of ammonium chloride, 25% of polyepichlorohydrin-dimethylamine and water.
7. The method for using the self-breaking modified soap kernel gel type fracturing fluid according to claim 6, which is characterized in that: sequentially adding water, modified soap kernel glue, antiseptic bactericide, cleanup additive and clay stabilizer according to a proportion, and uniformly stirring to prepare fracturing fluid base fluid; after the fracturing construction is started, simultaneously adding a fracturing fluid base fluid, a cross-linking agent, a hydrolysis catalyst and a construction setting amount of propping agent, uniformly stirring and cross-linking to form a mixed fluid of the propping agent and fracturing fluid gel, and injecting the mixed fluid into a stratum; closing the well for more than 30 minutes after construction is completed, waiting for the fracturing fluid to hydrolyze and break gel in a high-temperature underground environment, and then opening the well to open the hole for fluid discharge.
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103554291A (en) * | 2013-11-15 | 2014-02-05 | 西安石油大学 | Modification method and application of saponin gum for oil field production |
| CN103666436A (en) * | 2012-09-18 | 2014-03-26 | 中国石油天然气股份有限公司 | Acidic modified seaweed gel fracturing fluid |
| CN103666438A (en) * | 2012-09-18 | 2014-03-26 | 中国石油天然气股份有限公司 | Alkaline modified seaweed gel fracturing fluid |
| CN104449646A (en) * | 2014-11-20 | 2015-03-25 | 中国石油大学(北京) | Formula of novel water-based gelled fracturing fluid thickener |
| CN106085404A (en) * | 2016-06-06 | 2016-11-09 | 中国石油化工股份有限公司 | A kind of Low Damage, super low concentration guar gum fracturing fluid system, preparation method and application |
| CN112679656A (en) * | 2019-10-18 | 2021-04-20 | 中国石油化工股份有限公司 | Salt-tolerant low-temperature self-breaking slickwater resistance reducing agent |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7581590B2 (en) * | 2006-12-08 | 2009-09-01 | Schlumberger Technology Corporation | Heterogeneous proppant placement in a fracture with removable channelant fill |
| US11459885B2 (en) * | 2018-07-02 | 2022-10-04 | Halliburton Energy Services, Inc. | Workflow for predictive model to select formation damage treatment |
-
2022
- 2022-10-31 CN CN202211342681.0A patent/CN115926771B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103666436A (en) * | 2012-09-18 | 2014-03-26 | 中国石油天然气股份有限公司 | Acidic modified seaweed gel fracturing fluid |
| CN103666438A (en) * | 2012-09-18 | 2014-03-26 | 中国石油天然气股份有限公司 | Alkaline modified seaweed gel fracturing fluid |
| CN103554291A (en) * | 2013-11-15 | 2014-02-05 | 西安石油大学 | Modification method and application of saponin gum for oil field production |
| CN104449646A (en) * | 2014-11-20 | 2015-03-25 | 中国石油大学(北京) | Formula of novel water-based gelled fracturing fluid thickener |
| CN106085404A (en) * | 2016-06-06 | 2016-11-09 | 中国石油化工股份有限公司 | A kind of Low Damage, super low concentration guar gum fracturing fluid system, preparation method and application |
| CN112679656A (en) * | 2019-10-18 | 2021-04-20 | 中国石油化工股份有限公司 | Salt-tolerant low-temperature self-breaking slickwater resistance reducing agent |
Non-Patent Citations (2)
| Title |
|---|
| Forest belts for acoustic and pollutant protection on the perimeter of Kronospan Romania SRL Brasov.;Bolea, V. and Chira, D.;Revista de Silvicultura si Cinegetica;第17卷(第30期);第78-87页 * |
| 预处理温度对圆皂荚多糖胶制备与性能的影响;蒋建新; 朱莉伟; 张伟; 李先平;林产化学与工业;第40卷(第6期);第1-7页 * |
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