CN111088002B - Acidity-sensitive shunt temporary plugging agent and preparation method and application thereof - Google Patents
Acidity-sensitive shunt temporary plugging agent and preparation method and application thereof Download PDFInfo
- Publication number
- CN111088002B CN111088002B CN201911154397.9A CN201911154397A CN111088002B CN 111088002 B CN111088002 B CN 111088002B CN 201911154397 A CN201911154397 A CN 201911154397A CN 111088002 B CN111088002 B CN 111088002B
- Authority
- CN
- China
- Prior art keywords
- temporary plugging
- plugging agent
- acidity
- percent
- sensitive
- 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.)
- Active
Links
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
- C09K8/50—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
- C09K8/508—Compositions based on water or polar solvents containing organic compounds macromolecular compounds
- C09K8/514—Compositions based on water or polar solvents containing organic compounds macromolecular compounds of natural origin, e.g. polysaccharides, cellulose
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/13—Methods or devices for cementing, for plugging holes, crevices, or the like
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/25—Methods for stimulating production
- E21B43/26—Methods for stimulating production by forming crevices or fractures
- E21B43/261—Separate steps of (1) cementing, plugging or consolidating and (2) fracturing or attacking the formation
Abstract
The invention provides an acidity sensitive shunt temporary plugging agent and a preparation method and application thereof, the raw material composition of the acidity sensitive shunt temporary plugging agent comprises 10.0-15.0% of triazine nitrogen-containing heterocyclic organic compound, 10.0-20.0% of high molecular polymer anionic surfactant, 3.0-5.0% of tertiary amine amphoteric surfactant, 12.0-15.0% of mutual solvent, 5.0-8.0% of amine oxide amphoteric surfactant and the balance of water, the acidity sensitive shunt temporary plugging agent can be used in a reservoir acidification construction process, when the acid liquid concentration is reduced to 8-10% in the acidification process, 10-300 micron temporary plugging particles are formed, when the acid concentration is reduced to 3%, the formed temporary plugging particles are reduced to 10-20 nm, and finally the pressure is reduced, The purpose of increasing the yield.
Description
Technical Field
The invention belongs to the technical field of oilfield chemistry, and particularly relates to an acidity-sensitive shunt temporary plugging agent, and a preparation method and application thereof.
Background
In the process of oilfield water injection development, the water injection profile along with the development is uneven due to factors such as vertical heterogeneity of a reservoir and the like, and the injected water can rush along a high-permeability layer, so that a medium-low permeability layer is not or is difficult to be swept by the injected water, and the volume sweep coefficient of the injected water is reduced. The injection pressure of the wellhead of a partial injection well even reaches 35MPa, and the situation that partial layer system is under-injected still occurs. Acid diversion techniques are commonly employed to address the above issues to achieve uniform acidizing of the reservoir.
The conventional flow-dividing acidification technology is characterized in that a temporary plugging agent is injected in a slug mode in the acidification process, and then acid liquor is injected to promote the acid liquor to enter a low-permeability layer for profile adjustment, so that the construction process is complicated, and the flow-dividing effect is poor. In addition, the particles or the gel formed by the currently used water-soluble diverting agent in the acid liquor have low pressure-bearing strength and are easily broken through by the acid liquor under the temperature condition and the mineralization degree of the stratum; the inert substance and the oil-soluble diverter have higher pressure-bearing strength, but are insoluble in water, and are easy to pollute the stratum.
Disclosure of Invention
Aiming at the technical defects, the invention aims to provide an acidity-sensitive shunt temporary plugging agent for the shunt acidification demodulation combined action process of an oil field water injection well, aims to provide a preparation method of the acidity-sensitive shunt temporary plugging agent and aims to provide application of the acidity-sensitive shunt temporary plugging agent.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
an acidity-sensitive shunt temporary plugging agent comprises the following components in percentage by mass:
10.0 to 15.0 percent of triazine nitrogen-containing heterocyclic organic compound, 10.0 to 20.0 percent of high molecular polymer anionic surfactant, 3.0 to 5.0 percent of tertiary amine amphoteric surfactant, 12.0 to 15.0 percent of mutual solvent, 5.0 to 8.0 percent of amine oxide amphoteric surfactant and the balance of water.
Further, the triazine nitrogen-containing heterocyclic organic compound is preferably melamine or benzoguanamine.
Further, the high molecular polymer anionic surfactant is preferably sodium lignosulfonate, calcium lignosulfonate or magnesium lignosulfonate.
Further, the tertiary amine amphoteric surfactant is preferably lauramidopropyl dimethyl tertiary amine, cocoyl propyl tertiary amine or cocoamidopropyl dimethyl tertiary amine.
Further, the mutual solvent is preferably methanol or ethanol.
Preferably, the amine oxide type amphoteric surfactant is any one of lauramidopropyl amine oxide, dodecyl dimethyl amine oxide and octadecyl dimethyl amine oxide.
Specifically, the acidity-sensitive shunt temporary plugging agent comprises the following components in percentage by mass:
10.0 to 15.0 percent of melamine,
10.0 to 20.0 percent of sodium lignosulfonate,
3.0 to 5.0 percent of lauramidopropyl dimethyl tertiary amine,
12.0 to 15.0 percent of methanol,
5.0 to 8.0 percent of lauramidopropyl amine oxide,
the balance being water.
Further, the preparation method of the acidity-sensitive shunt temporary plugging agent comprises the following steps: sequentially adding triazine nitrogen-containing heterocyclic organic compound, tertiary amine amphoteric surfactant and amine oxide amphoteric surfactant according to the formula amount into a reaction kettle at the temperature of 15-40 ℃, adding water according to the formula amount, setting the rotating speed of the reaction kettle at 600-fold-over rotation/min, stirring until the materials are fully dissolved, adding mutual solvent according to the formula amount, and continuing stirring for 30-45 min to obtain the acidity-sensitive shunt temporary plugging agent.
Further, the application method of the acidity-sensitive shunt temporary plugging agent is that the acidity-sensitive shunt temporary plugging agent is directly added into acid liquor when a water injection well is in a shunt acidification measure, and the adding proportion is 5.0-8.0% of the volume of injected acid.
The shunt temporary plugging agent is an additive for shunt acidification of a water injection well, the additive is added into acid liquor, the acid liquor reacts with a stratum, and when the acid concentration in the acid liquor is reduced to 8-10%, temporary plugging particles with the particle size of 10-300 microns are formed in the acid liquor for plugging.
The invention has the following beneficial effects:
after the acidity-sensitive shunt temporary plugging agent is added with acid liquor, the concentration of generated calcium ions is gradually increased along with the decrease of the total acidity of the reaction of the acid liquor and rocks, the calcium ions and triazine nitrogen-containing heterocyclic organic compounds, tertiary amine amphoteric surfactants and amine oxide amphoteric surfactants act together, when the acid concentration in the acid liquor is reduced to 8-10%, the shunt temporary plugging agent can form temporary plugging particles with the particle size of 10-300 micrometers in the acid liquor, a high-permeability layer can be plugged effectively, the acid liquor is promoted to turn to a low-permeability layer, and the effect of adjusting a section is achieved; when the acid concentration is reduced to 3%, the formed temporary plugging particles are reduced to 10-20 nanometers, and finally the purposes of reducing pressure and increasing yield are achieved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a schematic diagram of the test effect of a water absorption profile of a conventional shunt temporary plugging agent;
FIG. 2 is a schematic diagram of the water absorption profile test effect of the acidity-sensitive shunt temporary plugging agent of the present invention;
the foregoing is a summary of the present invention, and in order to provide a clear understanding of the technical means of the present invention and to be implemented in accordance with the present specification, preferred embodiments of the present invention are described in detail below.
Detailed Description
The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will become apparent to those skilled in the art from the present disclosure.
The percentages in the examples are given by mass unless otherwise indicated.
It should be particularly noted that, the method for testing the temporary plugging performance of the acidity-sensitive shunt temporary plugging agent described in the following examples comprises:
1) the plugging rate test method comprises the following steps:
adding a flow splitting agent sample: respectively adding 5.0-8.0% of shunting agent into a 250mL triangular bottle with a plug, adding 5g of acid liquor and 35g of water, uniformly mixing, completely transferring the liquid into a funnel with medium-speed qualitative filter paper, starting timing, and recording the time T1 required when the filtered liquid reaches 30mL, wherein the time is calculated in seconds.
Blank sample: adding acid solution and 45g of water into a triangular flask with a plug of 250mL, uniformly mixing, transferring all the liquid into a funnel with medium-speed qualitative filter paper, starting timing, and recording the time T2 required by the filtered liquid reaching 30mL, wherein the time is calculated in seconds.
The temporary plugging rate is calculated as follows:
2) testing the dissolution performance of the temporary plugging particles:
respectively adding 5.0-8.0% of shunting agent into a 250mL triangular flask with a plug, then adding 5g of acid liquor and 35g of water, uniformly mixing, filtering by using medium-speed qualitative filter paper, then placing the temporary plugging particles filtered by the filter paper into a 500mL beaker, adding 500mL of water, pouring into a 100mL colorimetric tube, standing and observing, and observing whether a precipitate exists.
First embodiment
The embodiment provides an acidity-sensitive shunt temporary plugging agent which comprises the following components in percentage by mass:
10.0 to 15.0 percent of triazine nitrogen-containing heterocyclic organic compound, 10.0 to 20.0 percent of high molecular polymer anionic surfactant, 3.0 to 5.0 percent of tertiary amine amphoteric surfactant, 12.0 to 15.0 percent of mutual solvent, 5.0 to 8.0 percent of amine oxide amphoteric surfactant and the balance of water.
The embodiment also protects a preparation method of the acidity-sensitive shunt temporary plugging agent, which comprises the following steps: sequentially adding triazine nitrogen-containing heterocyclic organic compound, tertiary amine amphoteric surfactant and amine oxide amphoteric surfactant into a reaction kettle according to the formula amount at the temperature of 15-40 ℃, adding water according to the formula amount, setting the rotating speed of the reaction kettle to be 600-fold-over-800 rpm, stirring until the materials are fully dissolved, adding mutual solvent according to the formula amount, and continuing stirring for 30-45 minutes to obtain the acidity-sensitive shunt temporary plugging agent.
The acidity-sensitive shunt temporary plugging agent is an additive for shunt acidification, after acid liquor is added into the shunt temporary plugging agent, the concentration of generated calcium ions is gradually increased along with the decrease of the total acidity of the reaction of the acid liquor and rocks, the calcium ions and the triazine nitrogen-containing heterocyclic organic compound, the tertiary amine amphoteric surfactant and the amine oxide amphoteric surfactant act together, when the acid concentration in the acid liquor is reduced to 8-10%, the shunt temporary plugging agent can form temporary plugging particles with the particle size of 10-300 micrometers in the acid liquor, a high permeability layer can be effectively plugged, the acid liquor is promoted to turn to a low permeability layer, and the function of adjusting a section is achieved; when the acid concentration is reduced to 3%, the formed temporary plugging particles are reduced to 10-20 nanometers, and finally the purposes of reducing pressure and increasing yield are achieved.
Second embodiment
On the basis of the above embodiment, further, the triazine nitrogen-containing heterocyclic organic compound is melamine or benzoguanamine. Specifically, the triazine nitrogen-containing heterocyclic organic compound is preferably melamine with the effective component content of 99.8%. As the acid liquor reacts with the formation rock, when the concentration of the acid liquor is reduced to 8-10% (calculated by hydrochloric acid), the triazine nitrogen-containing heterocyclic organic compound can form temporary plugging particles of 10-100 microns.
Further, the high molecular polymer anionic surfactant is sodium lignosulfonate, calcium lignosulfonate or magnesium lignosulfonate. Specifically, the high molecular polymer anionic surfactant is preferably sodium lignosulfonate with the effective component content of 95%. The high molecular polymer anionic surfactant is added into the acid liquor, so that the filtration loss of the acid liquor can be effectively reduced, when the concentration of the acid liquor is reduced to 8-10%, temporary blocking particles of 100-300 microns can be formed under the combined action of the high molecular polymer anionic surfactant and melamine, and a filter cake is formed around the hole.
Further, the tertiary amine amphoteric surfactant is lauramidopropyl dimethyl tertiary amine, cocoyl propyl tertiary amine or cocoamidopropyl dimethyl tertiary amine. Specifically, the tertiary amine amphoteric surfactant is preferably lauramidopropyldimethyl tertiary amine with an amine value (mgKOH/g) of 185-200. The tertiary amine amphoteric surfactant can uniformly suspend the formed temporary plugging particles in the acid liquor under the action of the acid liquor.
Further, the mutual solvent is methanol or ethanol, and specifically, the mutual solvent is preferably methanol with an effective component content of 99%. The mutual solvent mainly acts to reduce the viscosity and the condensation point of the shunt temporary plugging agent, and is convenient to use in the environment with lower temperature.
Further, the amine oxide type amphoteric surfactant is any one of lauramidopropyl amine oxide, dodecyl dimethyl amine oxide and octadecyl dimethyl amine oxide. In particular, the amine oxide type amphoteric surfactant is preferably lauramidopropyl amine oxide with the effective component content of 34%, so that the viscosity of the acid liquor can be improved, and organic scales in the stratum can be cleaned. The amine oxide amphoteric surfactant has good foaming and foam stabilizing effects, and can form stable foam after the acid liquor reacts with formation rock, so that the corrosion of the acid liquor to large pores is reduced, and the action distance of the acid liquor is increased.
Third embodiment
The embodiment relates to an acidity-sensitive shunt temporary plugging agent, which comprises the following components in percentage by mass:
10.0 to 15.0 percent of melamine,
10.0 to 20.0 percent of sodium lignosulfonate,
3.0 to 5.0 percent of lauramidopropyl dimethyl tertiary amine,
12.0 to 15.0 percent of methanol,
5.0% -8.0% of lauramidopropyl amine oxide
The balance being water.
The embodiment also protects a preparation method of the acidity-sensitive shunt temporary plugging agent, which comprises the following steps: sequentially adding melamine, lauramidopropyl dimethyl tertiary amine and lauramidopropyl amine oxide into a reaction kettle according to the formula amount at the temperature of 15-40 ℃, then adding water according to the formula amount, setting the rotating speed of the reaction kettle at 600 plus materials/min, stirring until the materials are fully dissolved, adding methanol according to the formula amount, and continuing stirring for 30-45 min to obtain the acidity sensitive type shunt temporary plugging agent.
The shunt temporary plugging agent is an additive for shunt acidification, and after the shunt temporary plugging agent is added into acid liquor, when the acid liquor reacts with a stratum, and when the acid concentration in the acid liquor is reduced to 8-10%, the shunt temporary plugging agent can form temporary plugging particles with the particle size of 10-300 micrometers in the acid liquor, so that a hypertonic layer is plugged effectively.
Furthermore, the application method of the acidity-sensitive shunt temporary plugging agent is that the acidity-sensitive shunt temporary plugging agent is directly added into acid liquor when a water injection well shunts and acidifies measures, and the adding proportion is 5.0-8.0% of the volume of injected acid.
Fourth embodiment
The embodiment provides an acidity-sensitive shunt temporary plugging agent which comprises the following components in percentage by mass: 12.5% of melamine, 15.0% of sodium lignosulfonate, 4.0% of lauramidopropyl dimethyl tertiary amine, 13.5% of methanol, 6.5% of lauramidopropyl amine oxide and the balance of water.
The embodiment also provides a preparation method of the acidity-sensitive shunt temporary plugging agent, which comprises the following steps: sequentially adding melamine and sodium lignosulfonate into a reaction kettle at 25 ℃ according to the formula amount, stirring until the melamine and the sodium lignosulfonate are fully dissolved, adding lauramidopropyl dimethyl tertiary amine and lauramidopropyl amine oxide according to the formula amount, stirring until the lauramidopropyl dimethyl tertiary amine and the lauramidopropyl amine oxide are fully dissolved, adding methanol according to the formula amount, continuously stirring for 10-15 minutes, and finally adding water according to the formula amount to obtain the acidity-sensitive shunt temporary plugging agent.
The performance of the acidity-sensitive shunt temporary plugging agent of the present embodiment was tested indoors, and the quality technical test of the acidity-sensitive shunt temporary plugging agent was as follows:
| test items | The result of the detection |
| Temporary plugging rate | 98.74％ |
| Dissolution property of temporary plugging particles | Uniform and transparent without precipitate |
In 3 months in 2019, the acidity-sensitive type flow-dividing temporary plugging agent is tested on site in an X-ray oil extraction plant S12-28, and the utilization degree is increased from 44.3 percent to 75.8 percent. The section utilization is increased, and the single well is increased by 3.8 m; the water absorption form becomes good, and the water absorption form is changed from weak top to strong bottom into uniform water absorption. The test effect of the water absorption profile of the conventional shunt temporary plugging agent is shown in fig. 1, and the test effect of the water absorption profile of the acidity-sensitive shunt temporary plugging agent is shown in fig. 2. Table 1 is a table of test effect data of water absorption profile of conventional shunt temporary plugging agent, and table 2 is a table of test effect data of water absorption profile of the present invention:
TABLE 1
TABLE 2
Furthermore, the shunt temporary plugging agent is an additive for shunt acidification, after the acid liquor is added into the shunt temporary plugging agent, when the acid liquor reacts with the stratum, when the acid concentration in the acid liquor is reduced to 8% -10%, the shunt temporary plugging agent can form temporary plugging particles with different particle sizes in the acid liquor, so that a high permeability layer can be plugged effectively, the acid liquor is promoted to turn to a low permeability layer, and the function of adjusting the section is achieved.
Fifth embodiment
The embodiment provides an acidity-sensitive shunt temporary plugging agent which comprises the following components in percentage by mass:
12% of a melamine-containing compound, the proportion of melamine,
14 percent of sodium lignosulfonate,
4% of cocoyl propyl tertiary amine,
13 percent of methanol is added into the mixture, and the mixture is stirred,
6 percent of lauramide propyl amine oxide,
51% of water.
The embodiment also provides a preparation method of the acidity-sensitive shunt temporary plugging agent, which comprises the following steps: sequentially adding melamine and sodium lignosulfonate into a reaction kettle at 25 ℃ according to the formula amount, stirring until the melamine and the sodium lignosulfonate are fully dissolved, adding cocoyl propyl tertiary amine and lauramide propyl amine oxide according to the formula amount, stirring until the cocoyl propyl tertiary amine and the lauramide propyl amine oxide are fully dissolved, adding methanol according to the formula amount, continuously stirring for 10-15 minutes, and finally adding water according to the formula amount to obtain the acidity-sensitive shunt temporary plugging agent.
The performance of the acidity-sensitive shunt temporary plugging agent of the present embodiment was tested indoors, and the quality technical test of the acidity-sensitive shunt temporary plugging agent was as follows:
| test items | The result of the detection |
| Temporary plugging rate | 99.3％ |
| Dissolution property of temporary plugging particles | Uniform and transparent without precipitate |
In 2019, in 4 months, the acidity-sensitive type diversion temporary plugging agent is subjected to field test in an X oil recovery plant Q015-43, and the utilization degree is increased from 78.2% to 88.5%. The section utilization is increased, and the single well is increased by 2.1 m; the water absorption form becomes good, and the water absorption form is changed from weak top to strong bottom into uniform water absorption.
When the shunt temporary plugging agent is used for a shunt acidification measure of a water injection well, the shunt temporary plugging agent is directly added into acid liquor, and the adding proportion is 5.0-8.0% of the volume of the injected acid. When the diversion temporary plugging agent is used for diversion acidification measures of a water injection well, acid liquor can be effectively promoted to be diverted, and the improvement rate of a section is over 30 percent.
Sixth embodiment
The embodiment provides an acidity-sensitive shunt temporary plugging agent which comprises the following components in percentage by mass:
13% of a melamine, the proportion of which is,
16 percent of sodium lignosulphonate, wherein,
5 percent of lauramidopropyl dimethyl tertiary amine,
the content of the methanol is 14 percent,
7% of lauramidopropyl amine oxide,
45% of water.
The embodiment also provides a preparation method of the acidity-sensitive shunt temporary plugging agent, which comprises the following steps: sequentially adding melamine and sodium lignosulfonate into a reaction kettle at 25 ℃ according to the formula amount, stirring until the melamine and the sodium lignosulfonate are fully dissolved, adding lauramidopropyl dimethyl tertiary amine and lauramidopropyl amine oxide according to the formula amount, stirring until the lauramidopropyl dimethyl tertiary amine and the lauramidopropyl amine oxide are fully dissolved, adding methanol according to the formula amount, continuously stirring for 10-15 minutes, and finally adding water according to the formula amount to obtain the acidity-sensitive shunt temporary plugging agent.
The performance of the acidity-sensitive shunt temporary plugging agent of the present embodiment was tested indoors, and the quality technical test of the acidity-sensitive shunt temporary plugging agent was as follows:
| test items | The result of the detection |
| Temporary plugging rate | 99.7％ |
| Dissolution property of temporary plugging particles | Uniform and transparent without precipitate |
In 2019, in 4 months, the acidity-sensitive type flow-dividing temporary plugging agent is tested on site in an X-ray oil extraction plant S12-27, and the utilization degree is increased from 47.7% to 64.5%. The section utilization is increased, and the single well is increased by 2.4 m; the water absorption form becomes good, and the water absorption form is changed from weak top to strong bottom into uniform water absorption.
Seventh embodiment
The embodiment provides an acidity-sensitive shunt temporary plugging agent which comprises the following components in percentage by mass:
11% of a melamine-containing compound having a melamine content,
12 percent of sodium lignosulphonate, wherein,
3 percent of lauramidopropyl dimethyl tertiary amine,
13 percent of methanol is added into the mixture, and the mixture is stirred,
5 percent of lauramide propyl amine oxide,
56% of water.
The embodiment also provides a preparation method of the acidity-sensitive shunt temporary plugging agent, which comprises the following steps: sequentially adding melamine and sodium lignosulfonate into a reaction kettle at 25 ℃ according to the formula amount, stirring until the melamine and the sodium lignosulfonate are fully dissolved, adding lauramidopropyl dimethyl tertiary amine and lauramidopropyl amine oxide according to the formula amount, stirring until the lauramidopropyl dimethyl tertiary amine and the lauramidopropyl amine oxide are fully dissolved, adding methanol according to the formula amount, continuously stirring for 10-15 minutes, and finally adding water according to the formula amount to obtain the acidity-sensitive shunt temporary plugging agent.
Eighth embodiment
The diversion temporary plugging agent is tested on the HS oil field on site, the test well is a water well, and the water absorption profile shows that only the upper layer absorbs 90% of water and the lower layer absorbs 10% of water. In order to further adjust the water absorption profile and improve the water driving degree, an acid-controlled profile adjustment technical test is carried out. The specific formula of the shunt temporary plugging agent is as follows: 10.0% melamine, 10.0% sodium lignosulfonate, 3.0% lauramidopropyl dimethyl tertiary amine, 12.0% methanol, 5.0% lauramidopropyl amine oxide and 60% water.
The embodiment also provides a preparation method of the acidity-sensitive shunt temporary plugging agent, which comprises the following steps: sequentially adding melamine and sodium lignosulfonate into a reaction kettle at 25 ℃ according to the formula amount, stirring until the melamine and the sodium lignosulfonate are fully dissolved, adding lauramidopropyl dimethyl tertiary amine and lauramidopropyl amine oxide according to the formula amount, stirring until the lauramidopropyl dimethyl tertiary amine and the lauramidopropyl amine oxide are fully dissolved, adding methanol according to the formula amount, continuously stirring for 10-15 minutes, and finally adding water according to the formula amount to obtain the acidity-sensitive shunt temporary plugging agent.
When the shunt temporary plugging agent is used for a shunt acidification measure of a water injection well, the shunt temporary plugging agent is directly added into acid liquor, and the adding proportion is 5.0 percent of the volume of the injected acid liquor. In the construction process, after the water injection pressure is obviously reduced, climbing to a certain extent is generated, which shows that the shunting temporary plugging agent forms particles after the acidity is reduced, so that the high-permeability zone is effectively plugged, the follow-up acid liquid is prompted to turn, and the low-permeability layer is reformed. After construction, normal water injection is carried out, a water absorption section is tested after 15 days, and section test results show that the lower layer absorbs water to 42 percent, the upper layer absorbs water to 58 percent, the section is obviously improved, and the diversion and steering effect is obvious.
Ninth embodiment
When the diverting temporary plugging agent is used for field test in a ZB oil field, a test well is an one-well, and a water absorption profile shows that only the upper layer absorbs 100 percent of water and the lower layer does not absorb water. In order to further adjust the water absorption profile and improve the water driving degree, an acid-controlled profile adjustment technical test is carried out. The specific formula of the shunt temporary plugging agent is as follows: 15.0% melamine, 20.0% sodium lignosulfonate, 5.0% cocoyl propyl tertiary amine, 15.0% methanol, 8.0% lauramidopropyl amine oxide and balance water.
The embodiment also provides a preparation method of the acidity-sensitive shunt temporary plugging agent, which comprises the following steps: sequentially adding melamine and sodium lignosulfonate into a reaction kettle at 25 ℃ according to the formula amount, stirring until the melamine and the sodium lignosulfonate are fully dissolved, adding lauramidopropyl dimethyl tertiary amine and lauramidopropyl amine oxide according to the formula amount, stirring until the lauramidopropyl dimethyl tertiary amine and the lauramidopropyl amine oxide are fully dissolved, adding methanol according to the formula amount, continuously stirring for 10-15 minutes, and finally adding water according to the formula amount to obtain the acidity-sensitive shunt temporary plugging agent.
When the shunt temporary plugging agent is used for a shunt acidification measure of a water injection well, the shunt temporary plugging agent is directly added into acid liquor, and the adding proportion is 8.0 percent of the volume of the injected acid liquor. In the construction process, after the water injection pressure is obviously reduced, climbing to a certain extent is generated, which shows that the shunting temporary plugging agent forms particles after the acidity is reduced, so that the high-permeability zone is effectively plugged, the follow-up acid liquid is prompted to turn, and the low-permeability layer is reformed. After construction, normal water injection is carried out, a water absorption section is tested after 15 days, and section test results show that the lower layer absorbs water to 38%, the upper layer absorbs water to 62%, the section is obviously improved, and the diversion and steering effect is obvious.
The foregoing is illustrative of the preferred embodiments of the present invention, and the present invention is not to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein. Any simple modification, equivalent change and modification of the above embodiments according to the technical spirit of the present invention still fall within the scope of the technical solution of the present invention. While the embodiments of the present invention have been described in detail with reference to the drawings, the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art, and the scope of the present invention is within the scope of the claims.
Claims (10)
1. An acidity-sensitive shunt temporary plugging agent is characterized by comprising the following components in percentage by mass:
10.0 to 15.0 percent of triazine nitrogen-containing heterocyclic organic compound, 10.0 to 20.0 percent of high molecular polymer anionic surfactant, 3.0 to 5.0 percent of tertiary amine amphoteric surfactant, 12.0 to 15.0 percent of mutual solvent, 5.0 to 8.0 percent of amine oxide amphoteric surfactant and the balance of water;
the triazine nitrogen-containing heterocyclic ring organic compound is melamine or benzoguanamine;
the high molecular polymer anionic surfactant is sodium lignosulfonate, calcium lignosulfonate or magnesium lignosulfonate;
the tertiary amine amphoteric surfactant is lauramidopropyl dimethyl tertiary amine, cocoyl propyl tertiary amine or cocoamidopropyl dimethyl tertiary amine;
the mutual solvent is methanol or ethanol;
the amine oxide amphoteric surfactant is any one of lauramidopropyl amine oxide, dodecyl dimethyl amine oxide and octadecyl dimethyl amine oxide.
2. The acidity-sensitive shunt temporary plugging agent according to claim 1, wherein the shunt temporary plugging agent comprises the following components in percentage by mass:
10.0 to 15.0 percent of melamine,
10.0 to 20.0 percent of sodium lignosulfonate,
3.0 to 5.0 percent of lauramidopropyl dimethyl tertiary amine,
12.0 to 15.0 percent of methanol,
5.0% -8.0% of lauramidopropyl amine oxide
The balance being water.
3. The acidity-sensitive shunt temporary plugging agent according to claim 1, wherein: the triazine nitrogen-containing heterocyclic organic compound is melamine with the effective component content of 99.8%.
4. The acidity-sensitive shunt temporary plugging agent according to claim 1, wherein: the high molecular polymer anionic surfactant is sodium lignosulfonate with an effective component content of 95%.
5. The acidity-sensitive shunt temporary plugging agent according to claim 1, wherein: the tertiary amine amphoteric surfactant is lauramidopropyl dimethyl tertiary amine with the amine value of 185-200 mgKOH/g.
6. The acidity-sensitive shunt temporary plugging agent according to claim 1, wherein: the mutual solvent is methanol with 99 percent of effective component content.
7. The acidity-sensitive shunt temporary plugging agent according to claim 1, wherein: the amine oxide type amphoteric surfactant is lauramidopropyl amine oxide with the active ingredient content of 34 percent.
8. The method for preparing an acidity-sensitive shunt temporary plugging agent according to claim 1, comprising the steps of: sequentially adding triazine nitrogen-containing heterocyclic organic compound, tertiary amine amphoteric surfactant and amine oxide amphoteric surfactant into a reaction kettle according to the formula amount at the temperature of 15-40 ℃, adding water according to the formula amount, setting the rotating speed of the reaction kettle to be 600-fold-over-800 rpm, stirring until the materials are fully dissolved, then adding mutual solvent according to the formula amount, and continuing stirring for 30-45 minutes to obtain the acidity sensitive shunt temporary plugging agent.
9. The use of an acidity-sensitive shunt temporary plugging agent according to any one of claims 1 to 7, wherein: the application method is that when a diversion acidification measure is taken for a water injection well, the acidity sensitive diversion temporary plugging agent is directly added into acid liquor, and the adding proportion is 5.0-8.0% of the volume of injected acid.
10. The use of an acidity-sensitive shunt temporary plugging agent according to any one of claims 1 to 7, wherein: the shunt temporary plugging agent is an additive for shunt acidification of a water injection well, the acid liquor reacts with a stratum after the shunt temporary plugging agent is added into the acid liquor, and when the acid concentration in the acid liquor is reduced to 8-10%, the shunt temporary plugging agent forms temporary plugging particles with the particle size of 10-300 microns in the acid liquor for plugging.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911154397.9A CN111088002B (en) | 2019-11-22 | 2019-11-22 | Acidity-sensitive shunt temporary plugging agent and preparation method and application thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911154397.9A CN111088002B (en) | 2019-11-22 | 2019-11-22 | Acidity-sensitive shunt temporary plugging agent and preparation method and application thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111088002A CN111088002A (en) | 2020-05-01 |
| CN111088002B true CN111088002B (en) | 2021-11-30 |
Family
ID=70393519
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911154397.9A Active CN111088002B (en) | 2019-11-22 | 2019-11-22 | Acidity-sensitive shunt temporary plugging agent and preparation method and application thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111088002B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113549437B (en) * | 2021-08-19 | 2023-10-13 | 中海石油(中国)有限公司湛江分公司 | Preparation method and application of self-degradation leakage-proof plugging polymer composite material suitable for deep water and ultra-deep water drilling fluid |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7220709B1 (en) * | 1999-08-26 | 2007-05-22 | Bj Services Company | Process of diverting stimulation fluids |
| CN102504799A (en) * | 2011-11-29 | 2012-06-20 | 西南石油大学 | Acidification diverter composition |
| WO2015105513A1 (en) * | 2014-01-13 | 2015-07-16 | Halliburton Energy Services, Inc. | Hydrofluoric based invert emulsions for shale stimulation |
| CN105925255A (en) * | 2016-04-22 | 2016-09-07 | 中国石油天然气股份有限公司 | High-temperature profile control temporary plugging agent as well as preparation method and application thereof |
| CN107265965A (en) * | 2016-04-08 | 2017-10-20 | 南京唯才新能源科技有限公司 | A kind of aerogel foam concrete segment and preparation method thereof |
| CN108467724A (en) * | 2018-03-12 | 2018-08-31 | 中国石油天然气股份有限公司 | A kind of online shunting acid and preparation method thereof that water injection well is continuously injected into |
| CN110283579A (en) * | 2019-07-06 | 2019-09-27 | 西南石油大学 | A kind of temperature response type microgel and preparation method thereof |
| CN110317296A (en) * | 2019-07-06 | 2019-10-11 | 西南石油大学 | A kind of pH response type microgel and preparation method thereof |
| CN110358514A (en) * | 2019-07-02 | 2019-10-22 | 中国石油天然气股份有限公司 | A kind of accumulation type water solubility diverting agent and preparation method thereof |
-
2019
- 2019-11-22 CN CN201911154397.9A patent/CN111088002B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7220709B1 (en) * | 1999-08-26 | 2007-05-22 | Bj Services Company | Process of diverting stimulation fluids |
| CN102504799A (en) * | 2011-11-29 | 2012-06-20 | 西南石油大学 | Acidification diverter composition |
| WO2015105513A1 (en) * | 2014-01-13 | 2015-07-16 | Halliburton Energy Services, Inc. | Hydrofluoric based invert emulsions for shale stimulation |
| CN107265965A (en) * | 2016-04-08 | 2017-10-20 | 南京唯才新能源科技有限公司 | A kind of aerogel foam concrete segment and preparation method thereof |
| CN105925255A (en) * | 2016-04-22 | 2016-09-07 | 中国石油天然气股份有限公司 | High-temperature profile control temporary plugging agent as well as preparation method and application thereof |
| CN108467724A (en) * | 2018-03-12 | 2018-08-31 | 中国石油天然气股份有限公司 | A kind of online shunting acid and preparation method thereof that water injection well is continuously injected into |
| CN110358514A (en) * | 2019-07-02 | 2019-10-22 | 中国石油天然气股份有限公司 | A kind of accumulation type water solubility diverting agent and preparation method thereof |
| CN110283579A (en) * | 2019-07-06 | 2019-09-27 | 西南石油大学 | A kind of temperature response type microgel and preparation method thereof |
| CN110317296A (en) * | 2019-07-06 | 2019-10-11 | 西南石油大学 | A kind of pH response type microgel and preparation method thereof |
Non-Patent Citations (2)
| Title |
|---|
| Synthesis and optimization of the trimesic acid modified polymeric carbon nitride for enhanced photocatalytic reduction of CO2;Hayat, Asif; Khan, Javid; Rahman, Mati Ur; 等.;《JOURNAL OF COLLOID AND INTERFACE SCIENCE 》;20190715;第548卷;第197-205页 * |
| 超低渗油藏在线分流酸化增注技术研究与应用;邓志颖;张随望;宋昭杰;王尔珍;杨乾隆;吴文超;《石油与天然气地质》;20190104;第40卷(第2期);第430-435页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111088002A (en) | 2020-05-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| WO2015109917A1 (en) | Thickener for shale gas fracturing fluid, fracturing fluid and preparation method and use thereof | |
| CN103497754B (en) | A kind of high temperature and high salinity aqueous fracturing fluid | |
| CN103525393B (en) | A kind of Instant gelling agent for acid fluid and preparation method thereof and application | |
| CN112375557B (en) | Alcohol-soluble slickwater system for fracturing and preparation method and application thereof | |
| CN111088002B (en) | Acidity-sensitive shunt temporary plugging agent and preparation method and application thereof | |
| CN101717625A (en) | Clay stabilizing agent suitable for low-permeability oil pool | |
| CN108728053A (en) | A kind of low solid phase salt-water drilling fluid environmentally friendly heat and salinity tolerance closure fluid loss additive and preparation method thereof | |
| CN105131921B (en) | A kind of salt-resisting high-temperature-resisting high intensity crosslinked gel plugging aqua | |
| CN114752366A (en) | Biological surfactant plugging-removing injection-increasing agent and application system | |
| CN101948679B (en) | A kind of Intelligent reservoir drilling completion fluid system and preparation method thereof | |
| CN107216865B (en) | Self-diverting acidizing fluid and preparation method and application thereof | |
| CN111548782B (en) | Nano-enhanced supermolecule clean fracturing fluid and preparation method thereof | |
| CN105131915A (en) | High-temperature-resistant high-density solid-phase-free formate drilling fluid system | |
| CN110684515B (en) | Substituted sugars or glycosides and their use in drilling fluid compositions | |
| CN104403655A (en) | Novel fracturing fluid for oil field and preparation method of fracturing liquid | |
| CN110358514A (en) | A kind of accumulation type water solubility diverting agent and preparation method thereof | |
| CN106221682B (en) | Efficient clay expansion-resisting agent with waterproof lock function and preparation method thereof | |
| CN102757777B (en) | Inhibition water locking type high temperature resistant fracturing fluid for tight gas reservoir fracturing | |
| CN111154478B (en) | Filtrate reducer for enlarging effective action distance of acid liquor and preparation method and application thereof | |
| CN112480880B (en) | Solid-free drilling fluid, preparation method and application thereof | |
| CN106318361A (en) | Modifying and flooding agent for high-temperature high-calcium-magnesium oil pool and preparation method thereof | |
| CN111117584A (en) | Neutral blocking remover for water injection well of ultra-low permeability reservoir and preparation method | |
| CN101638576A (en) | Shielding and temporary plugging gelling agent for drilling fluid and production method and use method thereof | |
| CN112375550B (en) | Upper stratum collapse-prevention drilling fluid and preparation method thereof | |
| CN111100617B (en) | Mineralization-sensitive shunt temporary plugging agent and preparation method and application thereof |
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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |