CN113355080A - Multifunctional foam fracturing fluid and preparation method thereof - Google Patents
Multifunctional foam fracturing fluid and preparation method thereof Download PDFInfo
- Publication number
- CN113355080A CN113355080A CN202110618402.8A CN202110618402A CN113355080A CN 113355080 A CN113355080 A CN 113355080A CN 202110618402 A CN202110618402 A CN 202110618402A CN 113355080 A CN113355080 A CN 113355080A
- Authority
- CN
- China
- Prior art keywords
- agent
- multifunctional
- foam
- self
- fracturing fluid
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000006260 foam Substances 0.000 title claims abstract description 72
- 239000012530 fluid Substances 0.000 title claims abstract description 31
- 238000002360 preparation method Methods 0.000 title claims abstract description 7
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 46
- 239000003999 initiator Substances 0.000 claims abstract description 22
- 239000003381 stabilizer Substances 0.000 claims abstract description 19
- -1 hydroxy sulfobetaine Chemical compound 0.000 claims abstract description 13
- 239000007864 aqueous solution Substances 0.000 claims abstract description 11
- LPXPTNMVRIOKMN-UHFFFAOYSA-M sodium nitrite Chemical group [Na+].[O-]N=O LPXPTNMVRIOKMN-UHFFFAOYSA-M 0.000 claims abstract description 10
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonia chloride Chemical group [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 claims abstract description 8
- 235000010288 sodium nitrite Nutrition 0.000 claims abstract description 5
- GEGGDDNVHQPTCS-QXMHVHEDSA-N 2-[3-[[(z)-docos-13-enoyl]amino]propyl-dimethylazaniumyl]acetate Chemical group CCCCCCCC\C=C/CCCCCCCCCCCC(=O)NCCC[N+](C)(C)CC([O-])=O GEGGDDNVHQPTCS-QXMHVHEDSA-N 0.000 claims abstract description 4
- 235000019270 ammonium chloride Nutrition 0.000 claims abstract description 4
- 229940117986 sulfobetaine Drugs 0.000 claims abstract description 4
- LZZYPRNAOMGNLH-UHFFFAOYSA-M Cetrimonium bromide Chemical compound [Br-].CCCCCCCCCCCCCCCC[N+](C)(C)C LZZYPRNAOMGNLH-UHFFFAOYSA-M 0.000 claims abstract description 3
- 229930040373 Paraformaldehyde Natural products 0.000 claims abstract description 3
- UMGXUWVIJIQANV-UHFFFAOYSA-M didecyl(dimethyl)azanium;bromide Chemical compound [Br-].CCCCCCCCCC[N+](C)(C)CCCCCCCCCC UMGXUWVIJIQANV-UHFFFAOYSA-M 0.000 claims abstract description 3
- 229920002866 paraformaldehyde Polymers 0.000 claims abstract description 3
- 239000002904 solvent Substances 0.000 claims abstract description 3
- 239000004088 foaming agent Substances 0.000 claims description 14
- 238000002156 mixing Methods 0.000 claims description 7
- 239000011259 mixed solution Substances 0.000 claims description 6
- 239000003929 acidic solution Substances 0.000 claims description 4
- CXRFDZFCGOPDTD-UHFFFAOYSA-M Cetrimide Chemical compound [Br-].CCCCCCCCCCCCCC[N+](C)(C)C CXRFDZFCGOPDTD-UHFFFAOYSA-M 0.000 claims description 3
- ZKWJQNCOTNUNMF-QXMHVHEDSA-N 2-[dimethyl-[3-[[(z)-octadec-9-enoyl]amino]propyl]azaniumyl]acetate Chemical compound CCCCCCCC\C=C/CCCCCCCC(=O)NCCC[N+](C)(C)CC([O-])=O ZKWJQNCOTNUNMF-QXMHVHEDSA-N 0.000 claims description 2
- 238000006116 polymerization reaction Methods 0.000 claims description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 abstract description 12
- 239000001257 hydrogen Substances 0.000 abstract description 9
- 229910052739 hydrogen Inorganic materials 0.000 abstract description 9
- 239000002253 acid Substances 0.000 abstract description 8
- 239000004576 sand Substances 0.000 abstract description 8
- 230000007797 corrosion Effects 0.000 abstract description 3
- 238000005260 corrosion Methods 0.000 abstract description 3
- 230000015572 biosynthetic process Effects 0.000 abstract description 2
- WRIDQFICGBMAFQ-UHFFFAOYSA-N (E)-8-Octadecenoic acid Natural products CCCCCCCCCC=CCCCCCCC(O)=O WRIDQFICGBMAFQ-UHFFFAOYSA-N 0.000 abstract 1
- LQJBNNIYVWPHFW-UHFFFAOYSA-N 20:1omega9c fatty acid Natural products CCCCCCCCCCC=CCCCCCCCC(O)=O LQJBNNIYVWPHFW-UHFFFAOYSA-N 0.000 abstract 1
- QSBYPNXLFMSGKH-UHFFFAOYSA-N 9-Heptadecensaeure Natural products CCCCCCCC=CCCCCCCCC(O)=O QSBYPNXLFMSGKH-UHFFFAOYSA-N 0.000 abstract 1
- KWIUHFFTVRNATP-UHFFFAOYSA-N Betaine Natural products C[N+](C)(C)CC([O-])=O KWIUHFFTVRNATP-UHFFFAOYSA-N 0.000 abstract 1
- DPUOLQHDNGRHBS-UHFFFAOYSA-N Brassidinsaeure Natural products CCCCCCCCC=CCCCCCCCCCCCC(O)=O DPUOLQHDNGRHBS-UHFFFAOYSA-N 0.000 abstract 1
- CPELXLSAUQHCOX-UHFFFAOYSA-M Bromide Chemical compound [Br-] CPELXLSAUQHCOX-UHFFFAOYSA-M 0.000 abstract 1
- URXZXNYJPAJJOQ-UHFFFAOYSA-N Erucic acid Natural products CCCCCCC=CCCCCCCCCCCCC(O)=O URXZXNYJPAJJOQ-UHFFFAOYSA-N 0.000 abstract 1
- KWIUHFFTVRNATP-UHFFFAOYSA-O N,N,N-trimethylglycinium Chemical compound C[N+](C)(C)CC(O)=O KWIUHFFTVRNATP-UHFFFAOYSA-O 0.000 abstract 1
- ZQPPMHVWECSIRJ-UHFFFAOYSA-N Oleic acid Natural products CCCCCCCCC=CCCCCCCCC(O)=O ZQPPMHVWECSIRJ-UHFFFAOYSA-N 0.000 abstract 1
- 239000005642 Oleic acid Substances 0.000 abstract 1
- 229960003237 betaine Drugs 0.000 abstract 1
- 230000001934 delay Effects 0.000 abstract 1
- DPUOLQHDNGRHBS-KTKRTIGZSA-N erucic acid Chemical compound CCCCCCCC\C=C/CCCCCCCCCCCC(O)=O DPUOLQHDNGRHBS-KTKRTIGZSA-N 0.000 abstract 1
- 238000002309 gasification Methods 0.000 abstract 1
- QXJSBBXBKPUZAA-UHFFFAOYSA-N isooleic acid Natural products CCCCCCCC=CCCCCCCCCC(O)=O QXJSBBXBKPUZAA-UHFFFAOYSA-N 0.000 abstract 1
- ZQPPMHVWECSIRJ-KTKRTIGZSA-N oleic acid Chemical compound CCCCCCCC\C=C/CCCCCCCC(O)=O ZQPPMHVWECSIRJ-KTKRTIGZSA-N 0.000 abstract 1
- 230000000638 stimulation Effects 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 61
- 239000000243 solution Substances 0.000 description 14
- 230000002378 acidificating effect Effects 0.000 description 8
- 239000003245 coal Substances 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 5
- ROOXNKNUYICQNP-UHFFFAOYSA-N ammonium persulfate Chemical compound [NH4+].[NH4+].[O-]S(=O)(=O)OOS([O-])(=O)=O ROOXNKNUYICQNP-UHFFFAOYSA-N 0.000 description 4
- 238000010276 construction Methods 0.000 description 4
- 230000000903 blocking effect Effects 0.000 description 3
- 239000003345 natural gas Substances 0.000 description 3
- 229920000642 polymer Polymers 0.000 description 3
- 239000011148 porous material Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 2
- 229910001870 ammonium persulfate Inorganic materials 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000003795 desorption Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 238000007344 nucleophilic reaction Methods 0.000 description 2
- 238000006479 redox reaction Methods 0.000 description 2
- 239000004094 surface-active agent Substances 0.000 description 2
- BVKZGUZCCUSVTD-UHFFFAOYSA-M Bicarbonate Chemical compound OC([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-M 0.000 description 1
- 229920002907 Guar gum Polymers 0.000 description 1
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 239000004202 carbamide Substances 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 239000000665 guar gum Substances 0.000 description 1
- 229960002154 guar gum Drugs 0.000 description 1
- 235000010417 guar gum Nutrition 0.000 description 1
- GPRLSGONYQIRFK-UHFFFAOYSA-N hydron Chemical compound [H+] GPRLSGONYQIRFK-UHFFFAOYSA-N 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 230000002427 irreversible effect Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- UIIMBOGNXHQVGW-UHFFFAOYSA-M sodium bicarbonate Substances [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 description 1
- 229910000030 sodium bicarbonate Inorganic materials 0.000 description 1
- 235000017557 sodium bicarbonate Nutrition 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
Images
Classifications
-
- 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
- C09K8/70—Compositions for forming crevices or fractures characterised by their form or by the form of their components, e.g. foams
- C09K8/703—Foams
-
- 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
- C09K8/58—Compositions for enhanced recovery methods for obtaining hydrocarbons, i.e. for improving the mobility of the oil, e.g. displacing fluids
- C09K8/592—Compositions used in combination with generated heat, e.g. by steam injection
-
- 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
- C09K8/72—Eroding chemicals, e.g. acids
- C09K8/74—Eroding chemicals, e.g. acids combined with additives added for specific purposes
-
- 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
- C09K2208/30—Viscoelastic surfactants [VES]
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
本发明提供一种多功能泡沫压裂液及其制备方法，为水溶液，溶剂包括：自生气剂为亚硝酸钠；多功能剂为氯化铵；引发剂为多聚甲醛；起泡剂为十四烷基三甲基溴化铵、十六烷基三甲基溴化铵、双十烷基二甲基溴化铵中一种或多种；稳泡剂为芥酸酰胺丙基甜菜碱、油酸酰胺丙基甜菜碱、芥酸酰胺丙基羟基磺基甜菜碱、十六烷基羟丙基磺基甜菜碱中一种或多种。本发明延缓了强酸性环境对管柱的腐蚀，保证了氢离子的供给，避免出现氢离子在生气条件下不断被消耗；自生气反应剧烈，产生的泡沫多而稳定，可以保证将支撑剂携带入地层深处，而不造成砂堵事故，还会释放大量热量，使得吸附的甲烷解吸，提高泡沫压裂液的增产效率。
The invention provides a multifunctional foam fracturing fluid and a preparation method thereof. It is an aqueous solution, and the solvent comprises: the self-generating agent is sodium nitrite; the multifunctional agent is ammonium chloride; the initiator is paraformaldehyde; One or more of tetraalkyltrimethylammonium bromide, cetyltrimethylammonium bromide, and bis-decyldimethylammonium bromide; the foam stabilizer is erucamidopropyl betaine, One or more of oleic acid amidopropyl betaine, erucic acid amidopropyl hydroxy sulfobetaine, and hexadecyl hydroxypropyl sulfobetaine. The invention delays the corrosion of the pipe string caused by the strong acid environment, ensures the supply of hydrogen ions, and avoids the continuous consumption of hydrogen ions under the condition of gasification; deep into the formation, without causing sand plugging accidents, it will also release a lot of heat, desorb the adsorbed methane, and improve the stimulation efficiency of foam fracturing fluid.
Description
Technical Field
The invention belongs to the technical field of foam fracturing fluid, and particularly relates to multifunctional foam fracturing fluid and a preparation method thereof.
Background
The foam fracturing fluid has the advantages of high viscosity, strong sand carrying capacity, low filtration loss, quick flowback and the like, and is applied to hydraulic fracturing exploitation of unconventional natural gas resources such as shale gas, coal bed gas, dense gas and the like at present. However, the foam fracturing fluid has high self friction resistance and low liquid column pressure, and the application of the foam fracturing fluid in deep oil gas hydraulic fracturing is limited. Aiming at the defects, the self-generated foam fracturing fluid is proposed at present, and is generated in the underground and the stratum by virtue of gas generated spontaneously at the bottom of a well, so that the friction between the foam fracturing fluid and a shaft string is avoided, the pumping pressure of ground hydraulic fracturing construction is reduced (the number of required pump trucks is reduced), and the fracturing construction cost is reduced. Meanwhile, the self-generated foam fracturing fluid also avoids the use of gas supply equipment and foam preparation, and reduces the complexity of the hydraulic fracturing construction process.
In the existing self-generating foam fracturing fluid, an acidic initiator is often required to be added to accelerate the gas generation rate. It has been shown that the more acidic the self-generating gas solution system, the faster the gas generated and the more readily foam is formed. However, if the acidity is too strong, the pipe column will be corroded, causing potential safety hazards; if the acidity is too weak, the gas generation speed is low, the foam quality is reduced, a large amount of proppant is difficult to carry at the bottom of the well, and sand blockage is often formed. Meanwhile, in the process of generating the self-generated gas, hydrogen ions are consumed, acidity is weakened, and the later gas generation efficiency is slowed down, namely the efficiency of generating the foam is reduced.
The existing self-generating foam fracturing fluid system comprises self-generating gas, a foaming agent and a foam stabilizer;
the self-generated gas mainly comprises the following components:
(1) CO generation from sodium carbonate or bicarbonate under acidic conditions2；
(2) Ammonium persulfate and sodium nitrite are used for generating N under the acidic condition2；
(3) Ammonium persulfate + urea are used for generating N under acidic condition2；
(4) Under the acidic condition, the ammonium chloride and the sodium nitrite generate N2；
The foaming agent is a surfactant, and the foam stabilizer is gel, guar gum, polymer and the like.
The key points of the current self-generating foam system generation are the selection of the self-generating gas system and the screening of the foaming agent and the foam stabilizer. Aiming at the three important components, the problems of the self-generating foam system at present are as follows:
(1) for the self-generated gas system, the above four systems all need to generate gas under acidic condition, and the generation speed of the gas depends on the strength of the acidity. Strong acidity, fast gas generation, high quality of generated foam, easy carrying of proppant into stratum by formed foam fracturing fluid, and strong acidity, which can corrode the tubular column and cause potential safety hazard. If the acidity is weak, the corrosion to the pipe column can be weakened, but the gas generation is slow, the foam is not easy to generate, the proppant cannot be carried, and sand blockage can be easily caused near the well casing. Meanwhile, in the process of generating the self-generated gas, hydrogen ions are consumed, acidity is weakened, and the later gas generation efficiency is slowed down, namely the efficiency of generating the foam is reduced.
(2) Aiming at the selection of the existing foam stabilizer, a macromolecular polymer is mostly adopted as the foam stabilizer, which can cause a great amount of irreversible damage to low-pore and low-permeability unconventional gas reservoirs such as shale gas, coal bed gas and the like, can block pores seriously, and greatly reduces the flow conductivity of hydraulic cracks.
Disclosure of Invention
This patent provides an initiating agent of slow release hydrogen ion, has not only avoided the corruption of acidity to the tubular column, can guarantee the strong acidity in the foam system of self-generating moreover to produce the foam fast, carry the proppant and get into the stratum, improve hydraulic fracturing's efficiency, avoid forming sand blocking accident. In addition, the multifunctional foam fracturing fluid system related to the patent can be applied to hydraulic fracturing of unconventional natural gas resources such as coal bed gas, shale gas and the like, not only because the foam fracturing fluid has the advantages of high viscosity, strong sand carrying capacity, low filtration loss and rapid flowback, but also because the foam fracturing fluid can release a large amount of heat when self-generated foam is rapidly generated under high acidity, the desorption of adsorbed gas in the coal bed gas and the shale gas is facilitated, and the multifunctional foam fracturing fluid system has multiple functions.
The specific technical scheme is as follows:
the multifunctional foam fracturing fluid is an aqueous solution, and the solvent comprises a self-gassing agent, a multifunctional agent, an initiator, a foaming agent and a foam stabilizer;
the self-gassing agent is sodium nitrite, and the concentration range is as follows: 2-10 wt%;
the multifunctional agent is ammonium chloride, and the concentration ranges are as follows: 2-12 wt%;
the initiator is paraformaldehyde, the polymerization degree n ranges from 10 to 100, and the concentration ranges are as follows: 0.03 wt% -1 wt%;
the foaming agent is one or more of tetradecyl trimethyl ammonium bromide, hexadecyl trimethyl ammonium bromide and didecyl dimethyl ammonium bromide, and the concentration ranges are as follows: 0.05 wt% -0.5 wt%;
the foam stabilizer is one or more of erucamidopropyl betaine, oleamidopropyl betaine, erucamidopropyl hydroxysulfobetaine and hexadecyl hydroxypropyl sulfobetaine, and the concentration ranges are as follows: 0.5 wt% -3 wt%.
Mixing a multifunctional agent and an initiator to obtain an acidic solution; the multifunctional agent and the self-gas generating agent can obtain self-gas generation, and the multifunctional agent can be used as a clay stabilizer in the fracturing fluid.
The specific configuration method comprises the following steps:
step 1: mixing a multifunctional agent aqueous solution and an initiator aqueous solution at normal temperature, and spontaneously preparing to generate an acidic solution;
step 2: adding a multifunctional agent and a self-gassing agent into the mixed solution in the step 1;
and step 3: and adding a foaming agent, a foam stabilizer and a multifunctional agent into the mixed solution in the step 2.
The invention provides a multifunctional foam fracturing fluid, which has the following specific principle:
(1) firstly, when the multifunctional agent and the initiator are mixed together, the two agents can generate nucleophilic reaction in organic chemistry so as to slowly release hydrogen ions, and the concentration of the multifunctional agent and the initiator can be adjusted according to the required acidity, so that a strong acidic solution environment is obtained.
(2) Under the condition of slowly releasing hydrogen ions, the solution is strongly acidic, and excessive multifunctional agent and the self-gas generating agent undergo oxidation-reduction reaction to generate a large amount of N2And simultaneously, a large amount of heat is released, which is beneficial to desorption of methane adsorption gases such as coal bed gas, shale gas and the like.
(3) In a large number of N2At the same time, a large amount of foam is generated due to the foaming agent contained in the system.
(4) Because the system contains the foam stabilizer for increasing the viscosity of the system, the stability of the foam can be greatly improved, and the foam can be continuously pumped into the deep part of the stratum.
(5) The generated foam carries the proppant into the stratum quickly, and sand blocking accidents caused by accumulation in the near-wellbore area are avoided.
The invention has the technical effects that:
(1) the strong acid environment in the system is generated by the nucleophilic reaction of the multifunctional agent and the initiator, and hydrogen ions generated by the multifunctional agent and the initiator can be slowly released, so that the corrosion of the strong acid environment to a pipe column is delayed, the supply of the hydrogen ions is ensured, and the condition that the hydrogen ions are continuously consumed under the gas generation condition and the acidity is reduced (once the acidity is reduced, the gas generation speed is reduced) is avoided.
(2) Under the condition of strong acidity, the self-generated gas has violent reaction, can release a large amount of gas in a short time, and generates a large amount of stable foam in the presence of a foaming agent and a foam stabilizer, so that the proppant can be carried into the deep part of a stratum without causing sand blocking accidents.
(3) The reaction of self-generated gas is redox reaction, and can release a large amount of heat while generating gas, so that the adsorbed methane can be further desorbed under the hydraulic fracturing of unconventional natural gas resources such as coal bed gas and shale gas, and the yield increasing efficiency of the foam fracturing fluid is improved.
(4) The foam stabilizer in the system is a micromolecular viscoelastic surfactant, replaces polymers in conventional foam fracturing fluid, avoids a great deal of damage to stratum, and is a necessary choice for a low-damage fracturing fluid system especially for low-pore and low-permeability coal bed gas and shale gas.
(5) The self-generated foam fracturing fluid system can simplify the fracturing construction process and reduce the cost.
Drawings
FIG. 1 shows the acid concentration changes of the multifunctional agent and the initiator at different ratios in example 1 at normal temperature;
figure 2 is the self-generated foam generated from the multifunctional foam-based fracturing fluid system of example 4.
Detailed Description
The specific technical scheme of the invention is described by combining the embodiment.
Example 1:
the multifunctional agent of 0.3 wt% and the initiator of 0.3 wt% are mixed according to the volume ratio of different proportions to obtain the acid concentration curve at normal temperature, and as can be seen from the figure, the multifunctional agent and the initiator can rapidly generate acid within five minutes after mixing at normal temperature, and when the volume ratio is 1:1, the obtained acid solution has the highest concentration, namely the proportion can reduce the pH value of the system environment to the lowest, which is beneficial to the subsequent gas generation of the multifunctional agent and the self-gas generating agent under the strong acid condition.
Example 2:
mixing 0.1mol of multifunctional agent and 0.1mol of self-gassing agent in a volume ratio of 1:1 into 200ml of solution, taking half of the volume of the solution, adjusting the pH value to 2, adjusting the pH value of the other half of the volume of the solution to 3.5, putting the two solutions in a water bath kettle at 60 ℃, and measuring the gas production rate and the gas production speed of the two solutions in different time periods, wherein the specific data are shown in the following table 1. As is clear from the table, the stronger the acidity of the self-generating gas system, the greater the gas generation amount, and the higher the gas generation speed, the more favorable the subsequent generation of self-generating foam.
TABLE 1 Effect of pH on biogas and gas production Rate at 60 deg.C
Example 3:
mixing 0.1mol of multifunctional agent and 0.1mol of self-gassing agent in a volume ratio of 1:1 into 200ml of solution, taking half of the volume of the solution, adjusting the pH value to 2, adjusting the pH value of the other half of the volume of the solution to 4.8, putting the two solutions in a water bath kettle at 30 ℃, and measuring the gas production rate and the gas production speed of the two solutions in different time periods, wherein the specific data are shown in the following table 2. As can be seen from the table, the stronger the acidity of the self-generating gas system, the greater the amount of gas generation, and the higher the gas generation speed, the more favorable the subsequent generation of the self-generating foam system.
TABLE 2 influence of pH on biogas production and gas production rate at 30 deg.C
Example 4:
a multifunctional foam fracturing fluid system comprises a self-gas generating agent, a multifunctional agent, an initiator, a foaming agent and a foam stabilizer, and the preparation method comprises the following steps:
step 1: preparing 50ml of 0.6 wt% aqueous solution of an initiator;
step 2: preparing 50ml of 0.6 wt% multifunctional initiator aqueous solution, mixing the multifunctional initiator aqueous solution with the initiator aqueous solution obtained in the step 1, and uniformly stirring to obtain 100ml of solution;
and step 3: on the basis of the mixed solution obtained in the step 2, 5.34 wt% of multifunctional agent and 6.9 wt% of self-gassing agent are added;
and 4, step 4: on the basis of the mixed solution obtained in step 3, 0.1 wt% of a foaming agent such as tetradecyltrimethylammonium bromide, 1 wt% of a foam stabilizer such as erucamidopropylbetaine, and 2 wt% of a multifunctional agent are further added.
The mixed system was placed in a water bath at 60 ℃ and the formation of foam was observed. The results show that: the system rapidly foams at 60 ℃ and the resulting foam volume can fill the entire cylinder in a 1L cylinder, 3 hours later the height of the foam begins to decrease and the final foam has a volume half-life of 8 hours.
Claims (3)
1. The multifunctional foam fracturing fluid is characterized by being an aqueous solution, and the solvent comprises a self-gassing agent, a multifunctional agent, an initiator, a foaming agent and a foam stabilizer;
the self-gassing agent is sodium nitrite;
the multifunctional agent is ammonium chloride;
the initiator is paraformaldehyde, and the polymerization degree n ranges from 10 to 100;
the foaming agent is one or more of tetradecyl trimethyl ammonium bromide, hexadecyl trimethyl ammonium bromide and didecyl dimethyl ammonium bromide;
the foam stabilizer is one or more of erucamidopropyl betaine, oleamidopropyl betaine, erucamidopropyl hydroxysulfobetaine and hexadecyl hydroxypropyl sulfobetaine.
2. The multifunctional foam fracturing fluid of claim 1, wherein the concentration of the self-gassing agent is 2 wt% to 10 wt%; the concentration of the multifunctional agent is 2-12 wt%; the concentration of the initiator is 0.03 to 1 weight percent; the concentration of the foaming agent is 0.05 wt% -0.5 wt%; the concentration of the foam stabilizer is 0.5-3 wt%.
3. The preparation method of the multifunctional foam fracturing fluid as claimed in claim 1 or 2, which is characterized by comprising the following steps:
step 1: mixing a multifunctional agent aqueous solution and an initiator aqueous solution at normal temperature, and spontaneously preparing to generate an acidic solution;
step 2: adding a multifunctional agent and a self-gassing agent into the mixed solution in the step 1;
and step 3: and adding a foaming agent, a foam stabilizer and a multifunctional agent into the mixed solution in the step 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110618402.8A CN113355080A (en) | 2021-06-03 | 2021-06-03 | Multifunctional foam fracturing fluid and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110618402.8A CN113355080A (en) | 2021-06-03 | 2021-06-03 | Multifunctional foam fracturing fluid and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113355080A true CN113355080A (en) | 2021-09-07 |
Family
ID=77531804
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110618402.8A Pending CN113355080A (en) | 2021-06-03 | 2021-06-03 | Multifunctional foam fracturing fluid and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113355080A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102627960A (en) * | 2012-03-23 | 2012-08-08 | 中国石油集团西部钻探工程有限公司 | Self-gas-generating foam fracturing fluid, its production method and application method |
| CN102899012A (en) * | 2012-11-14 | 2013-01-30 | 北京世纪中星能源技术有限公司 | Self-born acid and preparation method and application thereof |
| CN103265938A (en) * | 2013-05-07 | 2013-08-28 | 四川省博仁达石油科技有限公司 | Foam-like fracturing system, preparation method and filling method thereof |
| CN106431052A (en) * | 2016-09-12 | 2017-02-22 | 中国石油大学(华东) | Foam stabilizer composition, application of foam stabilizer composition, foam cement slurry, additive composition of foam cement slurry and applications of foam cement slurry and additive composition of foam cement slurry |
| CN108130067A (en) * | 2018-01-23 | 2018-06-08 | 西南石油大学 | A kind of weak aqueous coal bed gas well Low Damage nitrogen foam fracturing fluid |
| CN111100624A (en) * | 2019-12-26 | 2020-05-05 | 中国石油大学(华东) | Low-corrosion self-gas-generation energy-increasing fracturing fluid and preparation method thereof |
| US20210024813A1 (en) * | 2019-07-24 | 2021-01-28 | Saudi Arabian Oil Company | Compositions for treating a subterranean formation with a foamed system and corresponding methods |
-
2021
- 2021-06-03 CN CN202110618402.8A patent/CN113355080A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102627960A (en) * | 2012-03-23 | 2012-08-08 | 中国石油集团西部钻探工程有限公司 | Self-gas-generating foam fracturing fluid, its production method and application method |
| CN102899012A (en) * | 2012-11-14 | 2013-01-30 | 北京世纪中星能源技术有限公司 | Self-born acid and preparation method and application thereof |
| CN103265938A (en) * | 2013-05-07 | 2013-08-28 | 四川省博仁达石油科技有限公司 | Foam-like fracturing system, preparation method and filling method thereof |
| CN106431052A (en) * | 2016-09-12 | 2017-02-22 | 中国石油大学(华东) | Foam stabilizer composition, application of foam stabilizer composition, foam cement slurry, additive composition of foam cement slurry and applications of foam cement slurry and additive composition of foam cement slurry |
| CN108130067A (en) * | 2018-01-23 | 2018-06-08 | 西南石油大学 | A kind of weak aqueous coal bed gas well Low Damage nitrogen foam fracturing fluid |
| US20210024813A1 (en) * | 2019-07-24 | 2021-01-28 | Saudi Arabian Oil Company | Compositions for treating a subterranean formation with a foamed system and corresponding methods |
| CN111100624A (en) * | 2019-12-26 | 2020-05-05 | 中国石油大学(华东) | Low-corrosion self-gas-generation energy-increasing fracturing fluid and preparation method thereof |
Non-Patent Citations (4)
| Title |
|---|
| 刘威 等: "自生酸前置压裂液在碳酸盐岩储层中的室内试验评价", 《科学技术与工程》 * |
| 李小刚 等: "泡沫压裂液研究进展与展望", 《应用化工》 * |
| 王业飞 等: "亚硝酸钠与氯化铵体系的反应特征", 《石油学报》 * |
| 蔡卓林 等: "新型类泡沫压裂液体系的研究及应用", 《钻采工艺》 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10526529B2 (en) | Treatment fluids comprising viscosifying agents and methods of using the same | |
| CN104066812B (en) | The tight gas volume increase being generated using original position nitrogen | |
| US10526530B2 (en) | Flooding operations employing chlorine dioxide | |
| CN104059625B (en) | Method for preparing high-stability heat-resistance and salt-tolerance air foam oil displacing agent | |
| US11136492B2 (en) | Low pH crosslinking of polymers | |
| CN109762549B (en) | Efficient self-gas-production foam fracturing fluid and construction method | |
| CN103265938A (en) | Foam-like fracturing system, preparation method and filling method thereof | |
| CN103867170A (en) | Low-yield low-pressure gas well self-gas-production foam liquid drainage method | |
| CN114085662A (en) | Preparation method and application of chemical self-generated heat energy-increasing fracturing fluid suitable for low-pressure and low-permeability oil and gas reservoirs | |
| CN110591685B (en) | In-situ self-generated microfoam steering acidizing fluid, acidizing steering method and application | |
| CN108729893A (en) | A kind of foam composite cold mining method improving recovery factor of heavy oil reservoir | |
| CN114940895A (en) | Clean high-performance carbon dioxide foam fracturing fluid and preparation method thereof | |
| CN101875841A (en) | Drag-reducing acid for ultra-deep well reconstruction | |
| CN115045643A (en) | Carbon dioxide fracturing-huff and puff combined production method applying surfactant | |
| CN113214818A (en) | Fracturing preposed self-acid-generating system and breaking reduction method thereof | |
| US20140202701A1 (en) | Iron Control Agents and Related Methods | |
| CN113355080A (en) | Multifunctional foam fracturing fluid and preparation method thereof | |
| AU2021102298A4 (en) | Micro-foam fracturing fluid, preparation method and use thereof | |
| CN111594124A (en) | Shallow tight oil reservoir imbibition fracturing method, fracturing system for shallow tight oil reservoir and discharge-free imbibition fracturing fluid | |
| CN104449622B (en) | High temperature resistance high pressure organic composite type Oil layer protective solution and preparation method thereof | |
| CN108165250A (en) | Nano foam acid and preparation method and use method thereof | |
| CN110437818A (en) | A kind of broken glue activator and preparation method thereof suitable for 20-50 DEG C of reservoir fracturing | |
| CN113969775A (en) | Method for improving effective acid corrosion seam length of ultra-deep carbonate rock reservoir and application | |
| CN105131924A (en) | Self-foaming flushing fluid tackifier, flushing fluid configuration reagent, and flushing fluid | |
| US11866644B1 (en) | Fracturing fluid based on oilfield produced fluid |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |