CN111087999A - High-temperature-resistant profile control agent for oil extraction and preparation method thereof - Google Patents
High-temperature-resistant profile control agent for oil extraction and preparation method thereof Download PDFInfo
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- CN111087999A CN111087999A CN202010026081.8A CN202010026081A CN111087999A CN 111087999 A CN111087999 A CN 111087999A CN 202010026081 A CN202010026081 A CN 202010026081A CN 111087999 A CN111087999 A CN 111087999A
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- 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
- C09K8/512—Compositions based on water or polar solvents containing organic compounds macromolecular compounds containing cross-linking agents
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Abstract
The invention discloses a high-temperature-resistant profile control agent for oil extraction and a preparation method thereof, wherein the profile control agent comprises the following substances in parts by mass: water: 480-530 parts of a cross-linking agent: 1.5-2.5 parts of a gel promoter: 1.5-2.5 parts of polyacrylamide: 1.5-2.5 parts of cross-linking agent, wherein the cross-linking agent comprises the following substances in parts by mass: urotropin: 30-40 parts of lactic acid: 23-28 parts of acetic acid: 12-16 parts of ethanol: 23-28 parts of an adhesion promoter, wherein the adhesion promoter comprises the following substances in parts by mass: resorcinol: 18-22 parts of nano silicon dioxide: 35-45 parts of nano sodium silicate: 12-16 parts of nano calcium carbonate: 8-12 parts of thiourea: 12-16 parts. The profile control agent developed by the invention has the advantages of temperature resistance, salt resistance, high strength and better thermal stability.
Description
Technical Field
The invention relates to the technical field of profile control agents, in particular to a high-temperature-resistant profile control agent for oil extraction and a preparation method thereof.
Background
The profile control agent forms gel with certain strength at the formation temperature, but the gel is slowly dissolved and loses strength along with the increase of the injection time and the temperature rise, so that the normal production work is influenced.
Disclosure of Invention
The invention aims to avoid the defects in the prior art and provides a high-temperature-resistant profile control agent for oil extraction and a preparation method thereof, so that the defects in the prior art are effectively overcome.
In order to achieve the purpose, the invention adopts the technical scheme that: the high-temperature-resistant profile control agent for oil extraction is composed of the following substances in parts by mass:
water: 480 to 530 parts by weight
A crosslinking agent: 1.5 to 2.5 portions
Promoting glue agent: 1.5 to 2.5 portions
Polyacrylamide: 1.5 to 2.5 portions
The cross-linking agent comprises the following substances in parts by mass:
urotropin: 30 to 40 portions of
Lactic acid: 23 to 28 parts of
Acetic acid: 12 to 16 portions of
Ethanol: 23 to 28 parts of
The preparation method of the cross-linking agent comprises the following steps:
the method comprises the following steps: adding ethanol into an enamel reaction kettle with an interlayer;
step two: heating the temperature in the reaction kettle to 50 ℃, starting stirring, adding urotropine, and stirring for 30 minutes;
step three: adding acetic acid and lactic acid in the stirring process in the second step, continuously controlling the temperature at 50 ℃, and continuously reacting for 2 hours to obtain a cross-linking agent finished product;
the gel promoter consists of the following substances in parts by mass:
resorcinol: 18 to 22 portions of
Nano silicon dioxide: 35 to 45 portions of
Nano sodium silicate: 12 to 16 portions of
Nano calcium carbonate: 8 to 12 portions of
Thiourea: 12 to 16 portions of
The preparation method of the gel promoter comprises the following steps:
sequentially adding resorcinol, nano silicon dioxide, nano sodium silicate, nano sodium carbonate and thiourea into a stirrer, and stirring for 0.5 hour to uniformly mix the materials to obtain the finished product of the gel promoter.
Further, the feed additive comprises the following substances in parts by mass:
water: 500 portions
A crosslinking agent: 2 portions of
Promoting glue agent: 2 portions of
Polyacrylamide: 2 portions of
The cross-linking agent comprises the following substances in parts by mass:
urotropin: 35 portions of
Lactic acid: 25 portions of
Acetic acid: 15 portions of
Ethanol: 25 portions of
The gel promoter consists of the following substances in parts by mass:
resorcinol: 20 portions of
Nano silicon dioxide: 40 portions of
Nano sodium silicate: 15 portions of
Nano calcium carbonate: 10 portions of
Thiourea: 15 portions of
The preparation method of the high-temperature-resistant profile control agent for oil extraction comprises the following steps:
the method comprises the following steps: taking 480-530 parts of water, slowly adding 1.5-2.5 parts of a glue promoter under a stirring state, then adding 1.5-2.5 parts of polyacrylamide, stirring for 1.5-2 hours to a full-dissolved state, and then standing for 24 hours for later use;
step two: and (3) adding 1.5-2.5 parts of a cross-linking agent into the standby liquid prepared in the step one, and uniformly stirring to obtain the high-temperature-resistant profile control agent.
The technical scheme of the invention has the following beneficial effects: the profile control agent developed by the invention has the advantages of temperature resistance, salt resistance, high strength and better thermal stability.
Detailed Description
The following examples further describe embodiments of the present invention in detail. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "connected" and "connected" are to be interpreted broadly, e.g., as being fixed or detachable or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Example 1
The high-temperature-resistant profile control agent for oil extraction is characterized by comprising the following substances in parts by mass:
water: 480 parts of
A crosslinking agent: 1.6 parts of
Promoting glue agent: 1.6 parts of
Polyacrylamide: 1.6 parts of
The cross-linking agent comprises the following substances in parts by mass:
urotropin: 32 portions of
Lactic acid: 24 portions of
Acetic acid: 13 portions of
Ethanol: 23 portions of
The preparation method of the cross-linking agent comprises the following steps:
the method comprises the following steps: adding 23 parts of ethanol into an enamel reaction kettle with an interlayer;
step two: heating the temperature in the reaction kettle to 50 ℃, starting stirring, adding 32 parts of urotropine, and stirring for 30 minutes;
step three: adding 13 parts of acetic acid and 23 parts of lactic acid in the stirring process in the second step, continuously controlling the temperature at 50 ℃, and continuously reacting for 2 hours to obtain a cross-linking agent finished product;
the gel promoter consists of the following substances in parts by mass:
resorcinol: 18 portions of
Nano silicon dioxide: 36 portions of
Nano sodium silicate: 13 portions of
Nano calcium carbonate: 8 portions of
Thiourea: 14 portions of
The preparation method of the gel promoter comprises the following steps:
and sequentially adding 18 parts of resorcinol, 36 parts of nano silicon dioxide, 13 parts of nano sodium silicate, 8 parts of nano sodium carbonate and 14 parts of thiourea into a stirrer, and stirring for 0.5 hour to uniformly mix the materials to obtain the finished product of the gel promoter.
The preparation method of the high-temperature-resistant profile control agent for oil extraction comprises the following steps:
the method comprises the following steps: taking 480 parts of water, slowly adding 1.6 parts of a gel promoter under a stirring state, then adding 1.6 parts of polyacrylamide, stirring for 1.5-2 hours to a full-dissolved state, and then standing for 24 hours for later use;
step two: and (3) adding 1.6 parts of cross-linking agent into the standby liquid prepared in the step one, and uniformly stirring to obtain the high-temperature-resistant profile control agent.
Example 2
The high-temperature-resistant profile control agent for oil extraction is characterized by comprising the following substances in parts by mass:
water: 500 portions
A crosslinking agent: 2 portions of
Promoting glue agent: 2 portions of
Polyacrylamide: 2 portions of
The cross-linking agent comprises the following substances in parts by mass:
urotropin: 35 portions of
Lactic acid: 25 portions of
Acetic acid: 15 portions of
Ethanol: 25 portions of
The preparation method of the cross-linking agent comprises the following steps:
the method comprises the following steps: adding 25 parts of ethanol into an enamel reaction kettle with an interlayer;
step two: heating the temperature in the reaction kettle to 50 ℃, starting stirring, adding 35 parts of urotropine, and stirring for 30 minutes;
step three: adding 15 parts of acetic acid and 25 parts of lactic acid in the stirring process in the second step, continuously controlling the temperature at 50 ℃, and continuously reacting for 2 hours to obtain a cross-linking agent finished product;
the gel promoter consists of the following substances in parts by mass:
resorcinol: 20 portions of
Nano silicon dioxide: 40 portions of
Nano sodium silicate: 15 portions of
Nano calcium carbonate: 10 portions of
Thiourea: 15 portions of
The preparation method of the gel promoter comprises the following steps:
and sequentially adding 20 parts of resorcinol, 40 parts of nano silicon dioxide, 15 parts of nano sodium silicate, 10 parts of nano sodium carbonate and 15 parts of thiourea into a stirrer, and stirring for 0.5 hour to uniformly mix the materials to obtain the finished product of the gel promoter.
The preparation method of the high-temperature-resistant profile control agent for oil extraction comprises the following steps:
the method comprises the following steps: taking 500 parts of water, slowly adding 2 parts of a gel promoter under a stirring state, then adding 2 parts of polyacrylamide, stirring for 1.5-2 hours to a full-dissolved state, and then standing for 24 hours for later use;
step two: and (3) adding 2 parts of cross-linking agent into the standby liquid prepared in the step one, and uniformly stirring to obtain the high-temperature-resistant profile control agent.
Example 3
The high-temperature-resistant profile control agent for oil extraction is characterized by comprising the following substances in parts by mass:
water: 520 parts of
A crosslinking agent: 2.4 parts of
Promoting glue agent: 2.4 parts of
Polyacrylamide: 2.4 parts of
The cross-linking agent comprises the following substances in parts by mass:
urotropin: 38 portions of
Lactic acid: 26 portions of
Acetic acid: 16 portions of
Ethanol: 27 portions of
The preparation method of the cross-linking agent comprises the following steps:
the method comprises the following steps: adding 27 parts of ethanol into an enamel reaction kettle with an interlayer;
step two: heating the temperature in the reaction kettle to 50 ℃, starting stirring, adding 38 parts of urotropine, and stirring for 30 minutes;
step three: adding 16 parts of acetic acid and 26 parts of lactic acid in the stirring process in the second step, continuously controlling the temperature at 50 ℃, and continuously reacting for 2 hours to obtain a cross-linking agent finished product;
the gel promoter consists of the following substances in parts by mass:
resorcinol: 22 portions of
Nano silicon dioxide: 44 portions of
Nano sodium silicate: 16 portions of
Nano calcium carbonate: 12 portions of
Thiourea: 16 portions of
The preparation method of the gel promoter comprises the following steps:
and sequentially adding 22 parts of resorcinol, 44 parts of nano silicon dioxide, 16 parts of nano sodium silicate, 12 parts of nano sodium carbonate and 16 parts of thiourea into a stirrer, and stirring for 0.5 hour to uniformly mix the materials to obtain the finished product of the gel promoter.
The preparation method of the high-temperature-resistant profile control agent for oil extraction comprises the following steps:
the method comprises the following steps: taking 520 parts of water, slowly adding 2.4 parts of a gel promoter under a stirring state, then adding 2.4 parts of polyacrylamide, stirring for 1.5-2 hours to a full-dissolved state, and then standing for 24 hours for later use;
step two: and (3) adding 2.4 parts of cross-linking agent into the standby liquid prepared in the step one, and uniformly stirring to obtain the high-temperature-resistant profile control agent.
The profile control agent developed by the invention has the advantages of temperature resistance, salt resistance, high strength and better thermal stability, and the specific mechanism is as follows:
(1) the nano particles are good reinforcing agents of polymer base materials, and can improve the strength, temperature resistance and the like of the original matrix materials;
(2) the specific surface area of the nano particles is large, the number of surface reaction groups is large, and the gelling time of the gel can be regulated and controlled by regulating the rate of the reaction participated by the nano particles;
(3) the nano particles have certain adsorption capacity at gas/liquid and liquid/liquid interfaces, and the stability of foam and emulsion can be improved by adding proper nano particles;
(4) the nano particles reach the deep part of the oil reservoir through the easy injection property and the self-assembly property of the nano particles, and the deep part placing purpose is realized.
The gelling properties of the conventional profile control agent with the three examples of the invention at different temperatures are shown in table 1.
Table 1:
the above parameters are explained below:
initial viscosity: the profile control agent is kept at a constant temperature for 10 minutes in each temperature state, then a distributed viscometer is started to test for 30 seconds and read, each sample is measured for three times, and the average value is taken as a measurement result, namely the initial viscosity of the sample to be tested;
and (3) gelling time: after the initial viscosity is tested, measuring the viscosity of the sample every 1 hour, namely testing the gelling viscosity of the sample, wherein the gelling time is the time when the ratio of the gelling viscosity to the initial viscosity is more than or equal to 50;
viscosity (30 d): viscosity of each sample on the thirty th day;
viscosity retention rate: the ratio of the viscosity of the sample at day thirty to the viscosity at day one after gelling, which data reflects thermal stability.
As is clear from table comparison, the viscosity retention degree of the high-temperature-resistant and high-temperature-resistant modified polymer can reach more than 85% in the temperature range of 90-180 ℃ in 30 days, namely the high-temperature-resistant and high-temperature-resistant modified polymer has excellent performance and is greatly improved compared with the conventional profile control agent.
The embodiments of the present invention have been presented for purposes of illustration and description, and are not intended to be exhaustive or limited to the invention in the form disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiment was chosen and described in order to best explain the principles of the invention and the practical application, and to enable others of ordinary skill in the art to understand the invention for various embodiments with various modifications as are suited to the particular use contemplated.
Claims (3)
1. The high-temperature-resistant profile control agent for oil extraction is characterized by comprising the following substances in parts by mass:
water: 480 to 530 parts by weight
A crosslinking agent: 1.5 to 2.5 portions
Promoting glue agent: 1.5 to 2.5 portions
Polyacrylamide: 1.5 to 2.5 portions
The cross-linking agent comprises the following substances in parts by mass:
urotropin: 30 to 40 portions of
Lactic acid: 23 to 28 parts of
Acetic acid: 12 to 16 portions of
Ethanol: 23 to 28 parts of
The preparation method of the cross-linking agent comprises the following steps:
the method comprises the following steps: adding ethanol into an enamel reaction kettle with an interlayer;
step two: heating the temperature in the reaction kettle to 50 ℃, starting stirring, adding urotropine, and stirring for 30 minutes;
step three: adding acetic acid and lactic acid in the stirring process in the second step, continuously controlling the temperature at 50 ℃, and continuously reacting for 2 hours to obtain a cross-linking agent finished product;
the gel promoter consists of the following substances in parts by mass:
resorcinol: 18 to 22 portions of
Nano silicon dioxide: 35 to 45 portions of
Nano sodium silicate: 12 to 16 portions of
Nano calcium carbonate: 8 to 12 portions of
Thiourea: 12 to 16 portions of
The preparation method of the gel promoter comprises the following steps:
sequentially adding resorcinol, nano silicon dioxide, nano sodium silicate, nano sodium carbonate and thiourea into a stirrer, and stirring for 0.5 hour to uniformly mix the materials to obtain the finished product of the gel promoter.
2. The high-temperature-resistant profile control agent for oil recovery as claimed in claim 1, wherein: the feed consists of the following substances in parts by mass:
water: 500 portions
A crosslinking agent: 2 portions of
Promoting glue agent: 2 portions of
Polyacrylamide: 2 portions of
The cross-linking agent comprises the following substances in parts by mass:
urotropin: 35 portions of
Lactic acid: 25 portions of
Acetic acid: 15 portions of
Ethanol: 25 portions of
The gel promoter consists of the following substances in parts by mass:
resorcinol: 20 portions of
Nano silicon dioxide: 40 portions of
Nano sodium silicate: 15 portions of
Nano calcium carbonate: 10 portions of
Thiourea: 15 parts.
3. A method for preparing the high temperature profile control agent for oil recovery according to claim 1 or 2, comprising the following steps:
the method comprises the following steps: taking 480-530 parts of water, slowly adding 1.5-2.5 parts of a glue promoter under a stirring state, then adding 1.5-2.5 parts of polyacrylamide, stirring for 1.5-2 hours to a full-dissolved state, and then standing for 24 hours for later use;
step two: and (3) adding 1.5-2.5 parts of a cross-linking agent into the standby liquid prepared in the step one, and uniformly stirring to obtain the high-temperature-resistant profile control agent.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113337259A (en) * | 2021-03-16 | 2021-09-03 | 任丘市油联化工有限公司 | Ultralow-temperature oligomeric polyphenol cross-linked polymer profile control agent and preparation method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113337259A (en) * | 2021-03-16 | 2021-09-03 | 任丘市油联化工有限公司 | Ultralow-temperature oligomeric polyphenol cross-linked polymer profile control agent and preparation method thereof |
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