CN110358514B - Aggregation type water-soluble temporary plugging agent and preparation method thereof - Google Patents
Aggregation type water-soluble temporary plugging agent and preparation method thereof Download PDFInfo
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- 230000002776 aggregation Effects 0.000 title claims abstract description 52
- 238000004220 aggregation Methods 0.000 title claims abstract description 52
- 238000002360 preparation method Methods 0.000 title abstract description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 87
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 64
- -1 ammonium N-hydroxyethyl ethylamine triacetate Chemical compound 0.000 claims abstract description 23
- KVCGISUBCHHTDD-UHFFFAOYSA-M sodium;4-methylbenzenesulfonate Chemical compound [Na+].CC1=CC=C(S([O-])(=O)=O)C=C1 KVCGISUBCHHTDD-UHFFFAOYSA-M 0.000 claims abstract description 23
- SYUNEGHLWKRYDK-UHFFFAOYSA-N azane tetradecyl benzenesulfonate Chemical compound N.CCCCCCCCCCCCCCOS(=O)(=O)C1=CC=CC=C1 SYUNEGHLWKRYDK-UHFFFAOYSA-N 0.000 claims abstract description 21
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims abstract description 19
- 235000019387 fatty acid methyl ester Nutrition 0.000 claims abstract description 19
- 238000000034 method Methods 0.000 claims abstract description 19
- 229910052708 sodium Inorganic materials 0.000 claims abstract description 19
- 239000011734 sodium Substances 0.000 claims abstract description 19
- POAOYUHQDCAZBD-UHFFFAOYSA-N 2-butoxyethanol Chemical compound CCCCOCCO POAOYUHQDCAZBD-UHFFFAOYSA-N 0.000 claims abstract description 17
- IXOCGRPBILEGOX-UHFFFAOYSA-N 3-[3-(dodecanoylamino)propyl-dimethylazaniumyl]-2-hydroxypropane-1-sulfonate Chemical compound CCCCCCCCCCCC(=O)NCCC[N+](C)(C)CC(O)CS([O-])(=O)=O IXOCGRPBILEGOX-UHFFFAOYSA-N 0.000 claims abstract description 17
- 239000002994 raw material Substances 0.000 claims abstract description 10
- 238000006243 chemical reaction Methods 0.000 claims description 21
- 238000003756 stirring Methods 0.000 claims description 15
- 238000001816 cooling Methods 0.000 claims description 7
- 230000004931 aggregating effect Effects 0.000 claims description 6
- 239000002245 particle Substances 0.000 abstract description 77
- 239000002253 acid Substances 0.000 abstract description 50
- 230000020477 pH reduction Effects 0.000 abstract description 33
- 238000002347 injection Methods 0.000 abstract description 29
- 239000007924 injection Substances 0.000 abstract description 29
- 239000000126 substance Substances 0.000 abstract description 23
- 238000002156 mixing Methods 0.000 abstract description 6
- 239000011148 porous material Substances 0.000 abstract description 4
- 230000035699 permeability Effects 0.000 description 15
- 238000010521 absorption reaction Methods 0.000 description 13
- 239000010419 fine particle Substances 0.000 description 10
- 239000007788 liquid Substances 0.000 description 10
- 238000012360 testing method Methods 0.000 description 10
- 230000033558 biomineral tissue development Effects 0.000 description 8
- 238000005516 engineering process Methods 0.000 description 8
- 239000000654 additive Substances 0.000 description 5
- 238000010276 construction Methods 0.000 description 5
- 230000000996 additive effect Effects 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 3
- 230000000903 blocking effect Effects 0.000 description 3
- 239000006260 foam Substances 0.000 description 3
- 239000004094 surface-active agent Substances 0.000 description 3
- 238000011282 treatment Methods 0.000 description 3
- GDXHBFHOEYVPED-UHFFFAOYSA-N 1-(2-butoxyethoxy)butane Chemical compound CCCCOCCOCCCC GDXHBFHOEYVPED-UHFFFAOYSA-N 0.000 description 2
- 229910001422 barium ion Inorganic materials 0.000 description 2
- VNBOYPSBJDOCEQ-UHFFFAOYSA-N benzenesulfonate tetradecylazanium Chemical compound [O-]S(=O)(=O)C1=CC=CC=C1.CCCCCCCCCCCCCC[NH3+] VNBOYPSBJDOCEQ-UHFFFAOYSA-N 0.000 description 2
- 239000013522 chelant Substances 0.000 description 2
- 239000003814 drug Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 239000003112 inhibitor Substances 0.000 description 2
- 230000002401 inhibitory effect Effects 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 239000002244 precipitate Substances 0.000 description 2
- 230000008719 thickening Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 239000011259 mixed solution Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000003129 oil well Substances 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
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- 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
- C09K8/50—Compositions for plastering borehole walls, i.e. compositions for temporary consolidation of borehole walls
- C09K8/504—Compositions based on water or polar solvents
- C09K8/506—Compositions based on water or polar solvents containing organic compounds
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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
- C09K8/72—Eroding chemicals, e.g. acids
- C09K8/74—Eroding chemicals, e.g. acids combined with additives added for specific purposes
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Abstract
The invention provides an aggregation type water-soluble temporary plugging agent and a preparation method thereof, wherein the aggregation type water-soluble temporary plugging agent comprises the following raw materials in percentage by mass: 10.0 to 15.0 percent of sodium p-toluenesulfonate, 5.0 to 10.0 percent of cocamidopropyl hydroxysultaine, 12.0 to 15.0 percent of ammonium tetradecyl benzene sulfonate, 10.0 to 15.0 percent of sodium fatty acid methyl ester sulfonate, 10.0 to 15.0 percent of ammonium N-hydroxyethyl ethylamine triacetate, 10.0 to 15.0 percent of ethylene glycol monobutyl ether and the balance of water. The chemical particles generated by mixing the aggregation type water-soluble temporary plugging agent and the acid liquor can be uniformly distributed in water for aggregation, and the particle size of the temporary plugging particles can be controlled and adjusted; the generated plugging rate can reach more than 90 percent; the generated aggregation type particles have uniform particle size and more particle size types, and meet the requirement of diversion acidification of the heterogeneous stratum. After the temporary plugging function is realized, the temporary plugging agent can be gradually dissolved in the later stage water injection process, so that the pore channel is dredged again, and the later stage water injection is not influenced.
Description
Technical Field
The invention relates to a water-soluble temporary plugging agent for an oil field and a preparation method thereof, in particular to an aggregation type water-soluble temporary plugging agent and a preparation method thereof, which can be used in the field of profile adjustment of a water injection well.
Background
One key factor in the success of matrix acidizing operations is the proper placement of the acid solution in order to allow all producing zones to be contacted with sufficient acid. If the reservoir is highly heterogeneous, acid will preferentially flow into the high permeability layer, while the low permeability layer is not treated. Therefore, diversion treatments are required to ensure that the entire formation is acidized. The diversion flow has the function of balancing the acid flow so as to acidify the stratum with different permeabilities.
The main current diversion flow-dividing process technologies mainly comprise: mechanical layering technology, chemical particle shunting technology, foam shunting technology, thickening acid shunting technology and the like. The underground mechanical layering separation tool can accurately realize the acid liquor distribution, but the process is complex, the period is long, and the requirements on the conditions of well completion and well cementation are very strict; the process of shunting by using the thickening acid liquid is gradually improved, and the high polymer crosslinked gelled diverting acid and the viscoelastic surfactant self-diverting acid are rapidly developed, but have the problems of higher cost, complex construction, difficult flowback and the like to different degrees. The foam shunting technology is a novel development direction at present, but the field application of the foam shunting technology needs special equipment and has a complex operation process. Therefore, the field application is more chemical particle shunting technology. However, the chemical particle diversion method is to add an oil-soluble but not water-soluble chemical particle (for oil wells) to the acid solution. Therefore, it is necessary to develop a water-soluble chemical particle for water injection well instead of oil-soluble chemical particle, which is used together with acidification to complete diversion acidification of water injection well and achieve the purpose of adjusting profile.
Disclosure of Invention
In order to overcome the problems of uneven acidification and poor plugging performance in the prior art, the invention provides an aggregation type water-soluble temporary plugging agent and a preparation method thereof. The blocking layer controls the flow of acid liquid entering the high permeability layer, so that the low permeability layer is effectively acidified. After acidification, the temporary plugging agent particles are dissolved thoroughly along with water injection, and the permeability of a high permeable layer is recovered, so that the problem of non-uniform acidification of a water injection well is solved, and the plugging capacity of the temporary plugging agent particles on the high permeable layer reaches over 90 percent.
The technical scheme adopted by the invention is as follows:
an aggregation type water-soluble temporary plugging agent comprises the following raw materials in percentage by mass: 10.0 to 15.0 percent of sodium p-toluenesulfonate, 5.0 to 10.0 percent of cocamidopropyl hydroxysultaine, 12.0 to 15.0 percent of ammonium tetradecyl benzene sulfonate, 10.0 to 15.0 percent of sodium fatty acid methyl ester sulfonate, 10.0 to 15.0 percent of ammonium N-hydroxyethyl ethylamine triacetate, 10.0 to 15.0 percent of ethylene glycol monobutyl ether and the balance of water.
The aggregation type water-soluble temporary plugging agent comprises the following raw materials in percentage by mass: 12.0% of sodium p-toluenesulfonate, 8.0% of cocamidopropyl hydroxysultaine, 13.0% of ammonium tetradecyl benzene sulfonate, 13.0% of sodium fatty acid methyl ester sulfonate, 13.0% of ammonium N-hydroxyethyl ethylamine triacetate, 13.0% of ethylene glycol monobutyl ether and the balance of water.
A preparation method of an aggregation type water-soluble temporary plugging agent is characterized by comprising the following steps: the method comprises the following specific steps:
sequentially adding sodium toluene sulfonate, ammonium tetradecyl benzenesulfonate, sodium fatty acid methyl ester sulfonate, ammonium N-hydroxyethyl ethylamine triacetate, cocamidopropyl hydroxysultaine and water into a reaction kettle in proportion, stirring for at least 20 minutes, adding into the reaction kettle at the temperature of 58-62 ℃, reacting for at least half an hour, finally adding ethylene glycol monobutyl ether in proportion, continuously stirring for 10-15 minutes, and cooling to room temperature to obtain the aggregation type water-soluble temporary plugging agent.
The method comprises the steps of sequentially adding sodium toluene sulfonate, ammonium tetradecyl benzene sulfonate, sodium fatty acid methyl ester sulfonate, ammonium N-hydroxyethyl ethylamine triacetate, cocamidopropyl hydroxysulfobetaine and water into a reaction kettle according to a ratio, stirring for at least 20 minutes, and adding into the reaction kettle at 60 ℃ for reaction for at least half an hour.
The room temperature was 20 ℃.
The sodium p-toluenesulfonate can form fine particles which are slightly soluble in acid when meeting water with mineralization degree, the particle size of the formed fine particles is 3-10 micrometers, and the formed chemical particles can be gradually dissolved by water after acidification is finished.
The ammonium tetradecyl benzene sulfonate can form tiny particles which are slightly soluble in acid when meeting water with mineralization degree, the formed particle size is between 10 and 30 micrometers, and after acidification is finished, the formed chemical particles can be gradually dissolved by water.
The aggregation type water-soluble temporary plugging agent is an additive for temporary plugging and acidification, and forms particles after meeting acid, so that the aggregation type water-soluble temporary plugging agent plays a role in plugging a high permeability layer and diverting acid liquor.
The invention has the beneficial effects that:
after the aggregation type water-soluble temporary plugging agent is mixed with acid liquor, the plugging rate of formed particles on a hypertonic layer reaches over 90 percent. The chemical particles generated by mixing the aggregation type water-soluble temporary plugging agent and the acid liquor can be uniformly distributed in water for aggregation, and the particle size of the temporary plugging particles can be controlled and adjusted; the generated plugging rate can reach more than 90 percent; the generated aggregation type particles have uniform particle size and more particle size types, and meet the requirement of diversion acidification of the heterogeneous stratum. After the temporary plugging function is realized, the temporary plugging agent can be gradually dissolved in the later stage water injection process, so that the pore channel is dredged again, and the later stage water injection is not influenced.
Detailed Description
Example 1
In order to overcome the problems of uneven acidification and poor plugging performance in the prior art, the invention provides an aggregation type water-soluble temporary plugging agent and a preparation method thereof. The blocking layer controls the flow of acid liquid entering the high permeability layer, so that the low permeability layer is effectively acidified. After acidification, the temporary plugging agent particles are dissolved thoroughly along with water injection, and the permeability of a high permeable layer is recovered, so that the problem of non-uniform acidification of a water injection well is solved, and the plugging capacity of the temporary plugging agent particles on the high permeable layer reaches over 90 percent.
An aggregation type water-soluble temporary plugging agent comprises the following raw materials in percentage by mass: 10.0% of sodium p-toluenesulfonate, 5.0% of cocamidopropyl hydroxysultaine, 12.0% of ammonium tetradecyl benzene sulfonate, 10.0% of sodium fatty acid methyl ester sulfonate, 10.0% of ammonium N-hydroxyethyl ethylamine triacetate, 10.0% of ethylene glycol monobutyl ether and the balance of water.
In this embodiment, the specific steps for preparing the aggregation type water-soluble temporary plugging agent are as follows: sequentially adding sodium toluene sulfonate, ammonium tetradecyl benzenesulfonate, sodium fatty acid methyl ester sulfonate, ammonium N-hydroxyethyl ethylamine triacetate, cocamidopropyl hydroxysultaine and water into a reaction kettle in proportion, stirring for at least 20 minutes, adding into the reaction kettle at the temperature of 58-62 ℃, reacting for at least half an hour, finally adding ethylene glycol monobutyl ether in proportion, continuously stirring for 10-15 minutes, and cooling to room temperature to obtain the aggregation type water-soluble temporary plugging agent.
In the invention, sodium p-toluenesulfonate can form fine particles which are slightly soluble in acid when meeting water with mineralization degree, the formed particle diameter is 3-10 microns, and after acidification is finished, the formed chemical particles can be gradually dissolved by water. The cocamidopropyl hydroxysulfobetaine forms a viscoelastic surfactant in acid liquor, can trap chemical particles with different particle sizes formed by the medicament together to form larger particles, and can uniformly disperse the formed particles in liquid. Tetradecyl ammonium benzenesulfonate can form slightly acid-soluble fine particles when meeting water with mineralization degree, the particle size is 10-30 μm, and the formed chemical particles can be gradually dissolved by water after acidification is completed. N-hydroxyethyl ethylamine triacetic acid ammonium can form slightly acid-soluble and water-soluble fine particles when meeting acid, and after acidification is completed, the formed chemical particles can be gradually dissolved by water, and can chelate iron ions, barium ions and the like in water, thereby inhibiting the generation of precipitates and prolonging the effective period of acidification. Ethylene glycol dibutyl ether, mainly acts to eliminate formation organic scale from forming plugs. The aggregation type water-soluble temporary plugging agent is an additive for temporary plugging acidification, forms particles after meeting acid, and plays a role in plugging a hypertonic layer and diverting acid liquor. After the aggregation type water-soluble temporary plugging agent is mixed with acid liquor, the plugging rate of formed particles on a hypertonic layer reaches over 90 percent.
The acidification process of the invention is to inject the mixed solution of the temporary plugging agent and the acid liquor into the stratum, the temporary plugging agent forms chemical particles in the acid environment and enters a high-permeability layer with smaller flow resistance preferentially to form the shielding bridge plug. The blocking layer controls the flow of acid liquid entering the high permeability layer, so that the low permeability layer is effectively acidified. After acidification, the temporary plugging agent particles are dissolved thoroughly along with water injection, and the permeability of a high permeable layer is recovered, so that the problem of non-uniform acidification of a water injection well is solved, and the plugging capacity of the temporary plugging agent particles on the high permeable layer reaches over 90 percent.
Example 2:
an aggregation type water-soluble temporary plugging agent comprises the following raw materials in percentage by mass: 12.0% of sodium p-toluenesulfonate, 8.0% of cocamidopropyl hydroxysultaine, 13.0% of ammonium tetradecyl benzene sulfonate, 13.0% of sodium fatty acid methyl ester sulfonate, 13.0% of ammonium N-hydroxyethyl ethylamine triacetate, 13.0% of ethylene glycol monobutyl ether and the balance of water.
In this embodiment, the specific steps for preparing the aggregation type water-soluble temporary plugging agent are as follows: sequentially adding sodium toluene sulfonate, ammonium tetradecyl benzenesulfonate, sodium fatty acid methyl ester sulfonate, ammonium N-hydroxyethyl ethylamine triacetate, cocamidopropyl hydroxysultaine and water into a reaction kettle in proportion, stirring for at least 20 minutes, adding into the reaction kettle at the temperature of 58-62 ℃, reacting for at least half an hour, finally adding ethylene glycol monobutyl ether in proportion, continuously stirring for 10-15 minutes, and cooling to room temperature to obtain the aggregation type water-soluble temporary plugging agent.
In the invention, sodium p-toluenesulfonate can form fine particles which are slightly soluble in acid when meeting water with mineralization degree, the formed particle diameter is 3-10 microns, and after acidification is finished, the formed chemical particles can be gradually dissolved by water.
The cocamidopropyl hydroxysulfobetaine forms a viscoelastic surfactant in acid liquor, can trap chemical particles with different particle sizes formed by the medicament together to form larger particles, and can uniformly disperse the formed particles in liquid.
Tetradecyl ammonium benzenesulfonate can form slightly acid-soluble fine particles when meeting water with mineralization degree, the particle size is 10-30 μm, and the formed chemical particles can be gradually dissolved by water after acidification is completed. N-hydroxyethyl ethylamine triacetic acid ammonium can form slightly acid-soluble and water-soluble fine particles when meeting acid, and after acidification is completed, the formed chemical particles can be gradually dissolved by water, and can chelate iron ions, barium ions and the like in water, thereby inhibiting the generation of precipitates and prolonging the effective period of acidification.
In the invention, the ethylene glycol dibutyl ether mainly eliminates the formation organic dirt to form blockage. The aggregation type water-soluble temporary plugging agent is an additive for temporary plugging acidification, forms particles after meeting acid, and plays a role in plugging a hypertonic layer and diverting acid liquor. After the aggregation type water-soluble temporary plugging agent is mixed with acid liquor, the plugging rate of formed particles on a hypertonic layer reaches over 90 percent.
The chemical particles generated by mixing the aggregation type water-soluble temporary plugging agent and the acid liquor can be uniformly distributed in water for aggregation, and the particle size of the temporary plugging particles can be controlled and adjusted; the generated plugging rate can reach more than 90 percent; the generated aggregation type particles have uniform particle size and more particle size types, and meet the requirement of diversion acidification of the heterogeneous stratum. After the temporary plugging function is realized, the temporary plugging agent can be gradually dissolved in the later stage water injection process, so that the pore channel is dredged again, and the later stage water injection is not influenced.
Example 3:
an aggregation type water-soluble temporary plugging agent comprises the following raw materials in percentage by mass: 15.0% of sodium p-toluenesulfonate, 10.0% of cocamidopropyl hydroxysultaine, 15.0% of ammonium tetradecyl benzene sulfonate, 15.0% of sodium fatty acid methyl ester sulfonate, 15.0% of ammonium N-hydroxyethyl ethylamine triacetate, 15.0% of ethylene glycol monobutyl ether and the balance of water.
Sequentially adding sodium toluene sulfonate, ammonium tetradecyl benzenesulfonate, sodium fatty acid methyl ester sulfonate, ammonium N-hydroxyethyl ethylamine triacetate, cocamidopropyl hydroxysultaine and water into a reaction kettle in proportion, stirring for at least 20 minutes, adding into the reaction kettle at the temperature of 58-62 ℃, reacting for at least half an hour, finally adding ethylene glycol monobutyl ether in proportion, continuously stirring for 10-15 minutes, and cooling to room temperature to obtain the aggregation type water-soluble temporary plugging agent.
Preferably, the sodium toluene sulfonate, the ammonium tetradecyl benzene sulfonate, the sodium fatty acid methyl ester sulfonate, the ammonium N-hydroxyethyl ethylamine triacetate, the cocamidopropyl hydroxysultaine and the water are sequentially added into the reaction kettle according to the proportion, stirred for at least 20 minutes and then added into the reaction kettle at the temperature of 60 ℃ for reaction for at least half an hour.
Preferably, the room temperature is 20 ℃.
Preferably, the sodium p-toluenesulfonate can form slightly acid-soluble fine particles when meeting water with mineralization degree, the formed particle size is 3-10 microns, and after acidification is finished, the formed chemical particles can be gradually dissolved by water.
Preferably, ammonium tetradecyl benzenesulfonate can form slightly acid-soluble fine particles with a particle size of 10-30 μm when meeting water of mineralization, and the formed chemical particles can be gradually dissolved by water after acidification is completed.
Preferably, the aggregation type water-soluble temporary plugging agent is an additive for temporary plugging and acidizing, and forms particles after meeting acid, so as to play a role in plugging a hypertonic layer and diverting acid liquor.
The chemical particles generated by mixing the aggregation type water-soluble temporary plugging agent and the acid liquor can be uniformly distributed in water for aggregation, and the particle size of the temporary plugging particles can be controlled and adjusted; the generated plugging rate can reach more than 90 percent; the generated aggregation type particles have uniform particle size and more particle size types, and meet the requirement of diversion acidification of the heterogeneous stratum. After the temporary plugging function is realized, the temporary plugging agent can be gradually dissolved in the later stage water injection process, so that the pore channel is dredged again, and the later stage water injection is not influenced.
Example 4:
the implementation provides an aggregation type water-soluble temporary plugging agent, which comprises the following raw materials: 10.0% of sodium p-toluenesulfonate, 5.0% of cocamidopropyl hydroxysultaine, 12.0% of ammonium tetradecyl benzene sulfonate, 10.0% of sodium fatty acid methyl ester sulfonate, 10.0% of ammonium N-hydroxyethyl ethylamine triacetate, 10.0% of ethylene glycol monobutyl ether and the balance of water.
The embodiment also provides a preparation method of the aggregation type water-soluble temporary plugging agent, which specifically comprises the following steps:
sequentially adding sodium toluenesulfonate, ammonium tetradecyl benzenesulfonate, sodium fatty acid methyl ester sulfonate, ammonium N-hydroxyethyl ethylamine triacetate and cocoamidopropyl hydroxysultaine into a reaction kettle, stirring for 20 minutes by using water, adding the mixture into the reaction kettle at the temperature of 60 ℃, reacting for half an hour, adding ethylene glycol monobutyl ether, continuously stirring for 10 minutes, and cooling to room temperature to obtain the aggregation type water-soluble temporary plugging agent.
The performance of the above-described inhibitor of this example was tested indoors. The quality technical indexes are as follows:
appearance: colorless transparent liquid at normal temperature;
pH value: 8.0;
specific gravity: 1.07;
water solubility: completely dissolve
Final particle size range formed: 50-100um
And (3) reservoir plugging rate: 92 percent of
The field test condition:
in 2017 for 4 months, the aggregation type water-soluble temporary plugging agent is firstly subjected to field test in the HJ oil field. The test well H42-36 is a water injection well with uneven water absorption and insufficient water injection section, when the water absorption test is carried out in the previous period, the upper layer of the perforation section does not absorb water (the water absorption capacity is 0), and the lower layer absorbs water in a spike shape (100%), so that the well is subjected to temporary plugging diversion acidizing treatment.
The well depth is 2000 m, the thickness of the full-well perforation section is 15 m, the upper layer is 6 m, and the lower layer is 9 m; the permeability is 3mD, the porosity is 12%, and as the peak-shaped water absorption of the underground layer is realized and the underground layer is an under-injection well, a main body acid solution is selected to be a chelating acid with a formula of 20 and an aggregation type water-soluble temporary plugging agent with a formula of 3 when a shunting acidification scheme is designed. The construction process comprises the following steps: injecting a front acid liquid slug 3 square, and pretreating a shaft and a blast hole; and then injecting acid liquor and a water-soluble temporary plugging agent simultaneously, wherein the injection speed is 1: 1, fully mixing acid liquor and a water-soluble temporary plugging agent in a shaft, and gradually aggregating to form particles with different particle sizes so as to plug a hypertonic layer; and then, continuously injecting the residual acid liquor, acidifying the low-permeability layer, and starting the low-permeability layer. And testing the water absorption section again after the construction is finished, and comparing. The data show that after the measures are taken, the water injection amount is increased, the injection allocation requirement is met, meanwhile, the upper layer starts to absorb water, the water absorption amount is 45%, the water absorption amount of the lower layer is reduced to 55%, the effect is obvious, and the purposes of increasing the injection and improving the section are achieved.
Example 5:
the implementation provides an aggregation type water-soluble temporary plugging agent, which comprises the following raw materials: 15.0% of sodium p-toluenesulfonate, 10.0% of cocamidopropyl hydroxysultaine, 15.0% of ammonium tetradecyl benzene sulfonate, 15.0% of sodium fatty acid methyl ester sulfonate, 15.0% of ammonium N-hydroxyethyl ethylamine triacetate, 15.0% of ethylene glycol monobutyl ether and the balance of water.
The performance of the above-described inhibitor of this example was tested indoors. The quality technical indexes are as follows:
appearance: colorless transparent liquid at normal temperature;
pH value: 8.2;
specific gravity: 1.08;
water solubility: completely dissolve
Final particle size range formed: 30-50um
And (3) reservoir plugging rate: 95 percent
The field test condition:
in 2017, in 8 months, the aggregation type water-soluble temporary plugging agent is subjected to field test in a JY oil field. The test well D214-16 is a water injection well with a section with uneven water absorption, and when a water absorption test is carried out in the previous period, the upper layer of the perforation section absorbs weak water (the water absorption is 15%), and the lower layer absorbs finger-shaped water (85%), so that the well is subjected to temporary plugging diversion acidification treatment.
The well depth is 2500 m, the thickness of the full-well perforation section is 20 m, the upper layer is 8m, and the lower layer is 12 m; the permeability is 0.8mD, the porosity is 10%, and as the underground layer absorbs water in a finger shape, a main acid solution is selected to be a chelating acid 22 formula and an aggregation type water-soluble temporary plugging agent 4 formula when a shunting acidification scheme is designed. The construction process comprises the following steps: injecting a front acid liquid slug in a direction of 4, and pretreating a shaft and a blast hole; and then injecting acid liquor and a water-soluble temporary plugging agent simultaneously, wherein the injection speed is 1: 1, fully mixing acid liquor and a water-soluble temporary plugging agent in a shaft, and gradually aggregating to form particles with different particle sizes so as to plug a hypertonic layer; and then, continuously injecting the residual acid liquor, acidifying the low-permeability layer, and starting the low-permeability layer. And testing the water absorption section again after the construction is finished, and comparing. The data show that after the measures are taken, the water injection amount is increased, the injection allocation requirement is met, meanwhile, the upper layer starts to absorb water, the water absorption amount is 42%, the water absorption amount of the lower layer is reduced to 58%, the effect is obvious, and the purposes of increasing the injection and improving the section are achieved.
The above examples are merely illustrative of the present invention and should not be construed as limiting the scope of the invention, which is intended to be covered by the claims and any design similar or equivalent to the scope of the invention. The processes and additives described in detail in the present invention are prior art and will not be further described in the present invention.
Claims (5)
1. An aggregation type water-soluble temporary plugging agent, which is characterized in that: the raw materials of the aggregation type water-soluble temporary plugging agent comprise the following components in percentage by mass: 10.0 to 15.0 percent of sodium p-toluenesulfonate, 5.0 to 10.0 percent of cocamidopropyl hydroxysultaine, 12.0 to 15.0 percent of ammonium tetradecyl benzene sulfonate, 10.0 to 15.0 percent of sodium fatty acid methyl ester sulfonate, 10.0 to 15.0 percent of ammonium N-hydroxyethyl ethylamine triacetate, 10.0 to 15.0 percent of ethylene glycol monobutyl ether and the balance of water.
2. An aggregating, water-soluble temporary plugging agent according to claim 1, wherein: the aggregation type water-soluble temporary plugging agent comprises the following raw materials in percentage by mass: 12.0% of sodium p-toluenesulfonate, 8.0% of cocamidopropyl hydroxysultaine, 13.0% of ammonium tetradecyl benzene sulfonate, 13.0% of sodium fatty acid methyl ester sulfonate, 13.0% of ammonium N-hydroxyethyl ethylamine triacetate, 13.0% of ethylene glycol monobutyl ether and the balance of water.
3. The method for preparing an aggregating water-soluble temporary plugging agent according to any one of claims 1 or 2, wherein: the method comprises the following specific steps:
sequentially adding sodium p-toluenesulfonate, ammonium tetradecyl benzenesulfonate, sodium fatty acid methyl ester sulfonate, ammonium N-hydroxyethylethylamine triacetate, cocamidopropyl hydroxysultaine and water into a reaction kettle in proportion, stirring for at least 20 minutes, adding into the reaction kettle at the temperature of 58-62 ℃, reacting for at least half an hour, finally adding ethylene glycol monobutyl ether in proportion, continuously stirring for 10-15 minutes, and cooling to room temperature to obtain the aggregation type water-soluble temporary plugging agent.
4. The method for preparing an aggregating water-soluble temporary plugging agent according to claim 3, wherein: sequentially adding sodium p-toluenesulfonate, ammonium tetradecyl benzenesulfonate, sodium fatty acid methyl ester sulfonate, ammonium N-hydroxyethylethylamine triacetate, cocamidopropyl hydroxysultaine and water into a reaction kettle in proportion, stirring for at least 20 minutes, adding into the reaction kettle at 60 ℃ for reaction for at least half an hour, finally adding ethylene glycol monobutyl ether in proportion, continuously stirring for 10-15 minutes, and cooling to room temperature to obtain the aggregation type water-soluble temporary plugging agent.
5. The method for preparing an aggregating water-soluble temporary plugging agent according to claim 3, wherein: the room temperature was 20 ℃.
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| CN111088002B (en) * | 2019-11-22 | 2021-11-30 | 中国石油天然气股份有限公司 | Acidity-sensitive shunt temporary plugging agent and preparation method and application thereof |
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