阅读说明：本技术 一种水溶性生物高分子堵水材料及其制备方法 (Water-soluble biopolymer water shutoff material and preparation method thereof ) 是由 罗刚 张超 干稳 李迪 于 2021-11-01 设计创作，主要内容包括：本发明公开一种水溶性生物高分子堵水材料及其制备方法,所述堵水材料由以下重量份配比的原料制备而成：所述堵水材料按重量份计包括：2-50份生物多糖中性溶液,0.2-5份三己醇胺醇溶液,0.1-5份三己醇胺醇溶液,0.1-5份半胱氨酸醇溶液,0.1-5份盐酸硫胺醇溶液,0.2-5份CDI醇溶液。本发明堵水材料通过使用生物高分子材料,实现零污染,有利于环保,该堵水材料的制备方法简单易行,操作方便,对设备要求低,工艺简单,该堵水材料的地层配伍性均强于现有堵水剂地层配伍性,生物降解性均强于现有堵水剂的生物降解性,封堵强度均强于现有堵水剂的封堵强度。(The invention discloses a water-soluble biopolymer water plugging material and a preparation method thereof, wherein the water plugging material is prepared from the following raw materials in parts by weight: the water plugging material comprises the following components in parts by weight: 2-50 parts of neutral solution of biological polysaccharide, 0.2-5 parts of trihexyl alcohol amine alcohol solution, 0.1-5 parts of cysteine alcohol solution, 0.1-5 parts of thiamine hydrochloride alcohol solution and 0.2-5 parts of CDI alcohol solution. The water plugging material realizes zero pollution by using the biopolymer material, is beneficial to environmental protection, has simple and easy preparation method, convenient operation, low requirement on equipment and simple process, has stronger stratum compatibility than that of the existing water plugging agent, stronger biodegradability than that of the existing water plugging agent and stronger plugging strength than that of the existing water plugging agent.)

1. The water-soluble biopolymer water shutoff material is characterized by being prepared from the following raw materials in parts by weight:

the water plugging material comprises the following components in parts by weight: 2-50 parts of neutral solution of biological polysaccharide, 0.2-5 parts of trihexyl alcohol amine alcohol solution, 0.1-5 parts of cysteine alcohol solution, 0.1-5 parts of thiamine hydrochloride alcohol solution and 0.2-5 parts of CDI alcohol solution.

2. The water-soluble biopolymer water shutoff material according to claim 1, which is prepared from the following raw materials in parts by weight:

the water plugging material comprises the following components in parts by weight: 2 parts of neutral solution of biological polysaccharide, 0.2 part of trihexyl alcohol solution, 0.1 part of cysteine alcohol solution, 0.1 part of thiamine hydrochloride alcohol solution and 0.2 part of CDI alcohol solution.

3. The water-soluble biopolymer water shutoff material according to claim 1, which is prepared from the following raw materials in parts by weight:

the water plugging material comprises the following components in parts by weight: 50 parts of neutral biological polysaccharide solution, 5 parts of trihexyl alcohol amine alcohol solution, 5 parts of cysteine alcohol solution, 5 parts of thiamine hydrochloride alcohol solution and 5 parts of CDI alcohol solution.

4. The preparation method of the water-soluble biopolymer water shutoff material according to any one of claims 1-3, characterized in that the preparation method comprises the following steps:

s1: adding a neutral solution of biological polysaccharide into an anaerobic glass reactor provided with an electric stirrer, a reflux condenser tube and a digital thermometer, setting the stirring speed at 100-200r/min, vacuumizing for 0.8-1.2 hours at 9-105 ℃ under the stirring condition, and introducing nitrogen;

s2: cooling the mixed solution in the S1 to 75-85 ℃, adding a CDI alcoholic solution, and stirring for 15-25 minutes;

s3: controlling the temperature of the mixed solution in the S2 at 75-85 ℃, sequentially adding a trihexyl alcohol solution, a cysteine alcohol solution and a thiamine hydrochloride alcohol solution, and stirring for 0.8-1.2 hours;

s4: controlling the temperature of the mixed solution in the S3 at 75-85 ℃, adding CDI alcohol solution, and continuously stirring for 3-5 hours to obtain water-soluble biopolymer water plugging material preparation solution;

s5: and (3) cooling the water-soluble biopolymer water plugging material preparation liquid in the S4 to 45-55 ℃, and extracting with alcohol under the protection of nitrogen to obtain the water-soluble biopolymer water plugging material.

5. The preparation method of the water-soluble biopolymer water shutoff material according to claim 4, wherein the preparation method comprises the following steps:

s1: adding a neutral solution of biological polysaccharide into an anaerobic glass reactor provided with an electric stirrer, a reflux condenser tube and a digital thermometer, setting the stirring speed to be 150r/min, vacuumizing for 1 hour at 100 ℃ under the stirring condition, and introducing nitrogen;

s2: cooling the mixed solution in the S1 to 80 ℃, adding a CDI alcoholic solution, and stirring for 20 minutes;

s3: controlling the temperature of the mixed solution in the S2 at 80 ℃, sequentially adding a trihexyl alcohol solution, a cysteine alcohol solution and a thiamine hydrochloride alcohol solution, and stirring for 1 hour;

s4: controlling the temperature of the mixed solution in the S3 at 80 ℃, adding CDI alcohol solution, and continuously stirring for 4.0 hours to obtain water-soluble biopolymer water plugging material preparation solution;

s5: and (3) cooling the water-soluble biopolymer water plugging material preparation liquid in the S4 to 50 ℃, and extracting with alcohol under the protection of nitrogen to obtain the water-soluble biopolymer water plugging material.

Technical Field

The invention relates to the technical field of biopolymer synthesis, in particular to a water-soluble biopolymer water plugging material and a preparation method thereof.

Background

The water-soluble biopolymer water shutoff material takes the biogum as a base material, and has the excellent characteristics of water solubility, high temperature resistance, acid and alkali resistance, salt resistance, environmental friendliness and the like; the water plugging agent has the characteristics of easy injection, easy plugging, high strength and the like in the water plugging application of the oil field, and can be widely applied to the yield increase field of oil reservoirs with high water content and rich edge and bottom water, even low-permeability oil reservoirs.

Because the existing oil field water shutoff has the problems of high underground temperature of an oil reservoir, high salinity, poor seepage capability and the like, the heat resistance in the stratum compatibility of the existing water shutoff agent is 20-45 ℃, the salt tolerance PH range is 8.6-9.1, the injectability is 72-73%, the biodegradability is 62-71%, and the plugging strength is 68-73%, the existing water shutoff agent is not suitable for oil fields, and the existing water shutoff agent has serious environmental pollution.

Disclosure of Invention

The invention aims to provide a water-soluble biopolymer water shutoff material and a preparation method thereof, which realize zero pollution and are beneficial to environmental protection by using a biopolymer material.

The purpose of the invention can be realized by the following technical scheme:

a water-soluble biopolymer water shutoff material is prepared from the following raw materials in parts by weight:

the water plugging material comprises the following components in parts by weight: 2-50 parts of neutral solution of biological polysaccharide, 0.2-5 parts of trihexyl alcohol amine alcohol solution, 0.1-5 parts of cysteine alcohol solution, 0.1-5 parts of thiamine hydrochloride alcohol solution and 0.2-5 parts of CDI alcohol solution.

Further, the water plugging material is prepared from the following raw materials in parts by weight:

the water plugging material comprises the following components in parts by weight: 2 parts of neutral solution of biological polysaccharide, 0.2 part of trihexyl alcohol solution, 0.1 part of cysteine alcohol solution, 0.1 part of thiamine hydrochloride alcohol solution and 0.2 part of CDI alcohol solution.

Further, the water plugging material is prepared from the following raw materials in parts by weight:

the water plugging material comprises the following components in parts by weight: 50 parts of neutral biological polysaccharide solution, 5 parts of trihexyl alcohol amine alcohol solution, 5 parts of cysteine alcohol solution, 5 parts of thiamine hydrochloride alcohol solution and 5 parts of CDI alcohol solution.

A preparation method of a water-soluble biopolymer water plugging material comprises the following steps:

s1: adding a neutral solution of biological polysaccharide into an anaerobic glass reactor provided with an electric stirrer, a reflux condenser tube and a digital thermometer, setting the stirring speed at 100-200r/min, vacuumizing for 0.8-1.2 hours at 9-105 ℃ under the stirring condition, and introducing nitrogen.

S2: and cooling the mixed solution in the S1 to 75-85 ℃, adding a CDI alcoholic solution, and stirring for 15-25 minutes.

S3: and controlling the temperature of the mixed solution in the S2 at 75-85 ℃, sequentially adding a trihexyl alcohol solution, a cysteine alcohol solution and a thiamine hydrochloride alcohol solution, and stirring for 0.8-1.2 hours.

S4: and controlling the temperature of the mixed solution in the S3 at 75-85 ℃, adding CDI alcohol solution, and continuously stirring for 3-5 hours to obtain the water-soluble biopolymer water plugging material preparation solution.

S5: and (3) cooling the water-soluble biopolymer water plugging material preparation liquid in the S4 to 45-55 ℃, and extracting with alcohol under the protection of nitrogen to obtain the water-soluble biopolymer water plugging material.

Further, the preparation method comprises the following steps:

s1: adding biological polysaccharide neutral solution into an anaerobic glass reactor provided with an electric stirrer, a reflux condenser tube and a digital thermometer, setting the stirring speed at 150r/min, vacuumizing for 1 hour at 100 ℃ under the stirring condition, and introducing nitrogen.

S2: cooling the mixed solution in the S1 to 80 ℃, adding a CDI alcoholic solution, and stirring for 20 minutes;

s3: and controlling the temperature of the mixed solution in the S2 at 80 ℃, sequentially adding a trihexyl alcohol solution, a cysteine alcohol solution and a thiamine hydrochloride alcohol solution, and stirring for 1 hour.

S4: and controlling the temperature of the mixed solution in the S3 at 80 ℃, adding a CDI alcohol solution, and continuously stirring for 4.0 hours to obtain a water-soluble biopolymer water plugging material preparation solution.

S5: and (3) cooling the water-soluble biopolymer water plugging material preparation liquid in the S4 to 50 ℃, and extracting with alcohol under the protection of nitrogen to obtain the water-soluble biopolymer water plugging material.

The invention has the beneficial effects that:

1. the stratum compatibility of the water plugging material is higher than that of the existing water plugging agent, the biodegradability of the water plugging material is higher than that of the existing water plugging agent, and the plugging strength of the water plugging material is higher than that of the existing water plugging agent;

2. the water plugging material disclosed by the invention realizes zero pollution by using the biopolymer material, is beneficial to environmental protection, and has the advantages of simple and feasible preparation method, convenience in operation, low requirement on equipment and simple process.

Detailed Description

The following will clearly and completely describe the technical solutions in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example 1:

a water-soluble biopolymer water shutoff material is prepared from the following raw materials in parts by weight:

raw materials	Amount of addition
		Neutral solution of biological polysaccharide	2 portions of
Trihexylamine alcohol solutions	0.2 part
		Cysteine alcohol solution	0.1 part
Thiamine hydrochloride alcohol solution	0.1 part
		CDI alcohol solution	0.2 part

The preparation method of the water plugging material comprises the following steps:

s1: adding biological polysaccharide neutral solution into an anaerobic glass reactor provided with an electric stirrer, a reflux condenser tube and a digital display thermometer, setting the stirring speed at 100-200r/min, vacuumizing for 1 hour at 100 ℃ under the stirring condition, and introducing nitrogen.

S2: the mixture in S1 was cooled to 80 ℃, CDI alcohol solution was added, and stirred for 20 minutes.

S3: the temperature of the mixed solution in S2 was controlled to 80 ℃, and trihexyl alcohol solution, cysteine alcohol solution, and thiamine hydrochloride alcohol solution were sequentially added and stirred for 1 hour.

S4: and controlling the temperature of the mixed solution in the S3 at 80 ℃, adding the CDI alcohol solution, and continuously stirring for 4.0 hours to obtain the water-soluble biopolymer water plugging material preparation solution.

S5: and (3) cooling the water-soluble biopolymer water plugging material preparation liquid in the S4 to 50 ℃, and extracting with alcohol under the protection of nitrogen to obtain the water-soluble biopolymer water plugging material.

The water-soluble biopolymer water shutoff material obtained in S5 has the following recorded results according to indoor and field tests:

example 2:

a water-soluble biopolymer water plugging material is prepared from the following raw materials in parts by weight:

raw materials	Amount of addition
		Neutral solution of biological polysaccharide	5 portions of
Trihexylamine alcohol solutions	2 portions of
		Cysteine alcohol solution	2 portions of
Thiamine hydrochloride alcohol solution	2 portions of
		CDI alcohol solution	2 portions of

The preparation method of the water plugging material comprises the following steps:

s1: in an anaerobic glass reactor provided with an electric stirrer, a reflux condenser tube and a digital thermometer, the stirring speed of the neutral solution of the biological polysaccharide is set to be 100-200r/min, the solution is vacuumized for 1 hour at 100 ℃ under the stirring condition, and nitrogen is introduced.

S2: the mixture in S1 was cooled to 80 ℃, CDI alcohol solution was added, and stirred for 20 minutes.

S3: the temperature of the mixed solution in S2 was controlled to 80 ℃, and trihexyl alcohol solution, cysteine alcohol solution, and thiamine hydrochloride alcohol solution were sequentially added and stirred for 1 hour.

S4: and controlling the temperature of the mixed solution in the S3 at 80 ℃, adding the CDI alcohol solution, and continuously stirring for 4.0 hours to obtain the water-soluble biopolymer water plugging material preparation solution.

S5: and (3) cooling the water-soluble biopolymer water plugging material preparation liquid in the S4 to 50 ℃, and extracting with alcohol under the protection of nitrogen to obtain the water-soluble biopolymer water plugging material.

The water-soluble biopolymer water shutoff material obtained in S5 has the following recorded results according to indoor and field tests:

example 3:

a water-soluble biopolymer water plugging material is prepared from the following raw materials in parts by weight:

raw materials	Amount of addition
		Neutral solution of biological polysaccharide	30 portions of
Trihexylamine alcohol solutions	0.4 portion of
		Cysteine alcohol solution	0.3 part
Thiamine hydrochloride alcohol solution	0.3 part
		CDI alcohol solution	0.3 part

The preparation method of the water plugging material comprises the following steps:

s1: adding biological polysaccharide neutral solution into an anaerobic glass reactor provided with an electric stirrer, a reflux condenser tube and a digital display thermometer, setting the stirring speed at 100-200r/min, vacuumizing for 1 hour at 100 ℃ under the stirring condition, and introducing nitrogen.

S2: the mixture in S1 was cooled to 80 ℃, CDI alcohol solution was added, and stirred for 20 minutes.

S3: the temperature of the mixed solution in S2 was controlled to 80 ℃, and trihexyl alcohol solution, cysteine alcohol solution, and thiamine hydrochloride alcohol solution were sequentially added and stirred for 1 hour.

S4: and controlling the temperature of the mixed solution in the S3 at 80 ℃, adding the CDI alcohol solution, and continuously stirring for 4.0 hours to obtain the water-soluble biopolymer water plugging material preparation solution.

S5: and (3) cooling the water-soluble biopolymer water plugging material preparation liquid in the S4 to 50 ℃, and extracting with alcohol under the protection of nitrogen to obtain the water-soluble biopolymer water plugging material.

The water-soluble biopolymer water shutoff material obtained in S5 has the following recorded results according to indoor and field tests:

example 4:

a water-soluble biopolymer water plugging material is prepared from the following raw materials in parts by weight:

raw materials	Amount of addition
		Neutral solution of biological polysaccharide	50 parts of alcoholic solution
Trihexylamine alcohol solutions	5 parts of alcoholic solution
		Cysteine alcohol solution	5 parts of alcoholic solution
Thiamine hydrochloride alcohol solution	5 parts of alcoholic solution
		CDI solution alcoholic solution	5 parts of alcoholic solution

The preparation method of the water plugging material comprises the following steps:

s1: adding biological polysaccharide neutral solution into an anaerobic glass reactor provided with an electric stirrer, a reflux condenser tube and a digital display thermometer, setting the stirring speed at 100-200r/min, vacuumizing for 1 hour at 100 ℃ under the stirring condition, and introducing nitrogen.

S2: the mixture in S1 was cooled to 80 ℃, CDI alcohol solution was added, and stirred for 20 minutes.

S3: the temperature of the mixed solution in S2 was controlled to 80 ℃, and trihexyl alcohol solution, cysteine alcohol solution, and thiamine hydrochloride alcohol solution were sequentially added and stirred for 1 hour.

S4: and controlling the temperature of the mixed solution in the S3 at 80 ℃, adding the CDI alcohol solution, and continuously stirring for 4.0 hours to obtain the water-soluble biopolymer water plugging material preparation solution.

S5: and (3) cooling the water-soluble biopolymer water plugging material preparation liquid in the S4 to 50 ℃, and extracting with alcohol under the protection of nitrogen to obtain the water-soluble biopolymer water plugging material.

The water-soluble biopolymer water shutoff material obtained in S5 has the following recorded results according to indoor and field tests:

according to the recorded results of the above examples, it can be seen that the water-soluble biopolymer water shutoff material prepared in any one of examples 1 to 4 has a stronger stratum compatibility than the existing water shutoff agent, a stronger biodegradability than the existing water shutoff agent, and a stronger shutoff strength than the existing water shutoff agent.

In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed.