阅读说明：本技术 一种生产页岩气暂堵材料的工艺 (Process for producing shale gas temporary plugging material ) 是由 杨来文 杨基林 杨文清 杨红志 于 2019-09-20 设计创作，主要内容包括：本发明公开了一种生产页岩气暂堵材料的工艺,S1、选材：选取纯净水20-40份、凝胶剂15-28份、碳酸钙6-10份、氧化沥青8-13份、骨胶10-16份、聚氨酯4-9份、二氧化硅3-7份、膨润土2-6份、羧甲基纤维素2-5份和尿素1-3份,涉及暂堵即制备技术领域。该生产页岩气暂堵材料的工艺,在制备时通过添加碳酸钙、氧化沥青、二氧化硅和膨润土,使得暂堵材料的强度显著增加,经久耐用,保证了封堵效果,通过添加聚氨酯和羧甲基纤维素,在暂堵材料形成一层防护胶,对暂堵材料表面进行了很好的保护,使得暂堵材料表层不易被冲刷,在需要疏通时,能够快速的将表层破开,提高了疏通效率,同时该暂堵材料生产工艺制备步骤简单易行,制备效率高,便于推广。(The invention discloses a process for producing a shale gas temporary plugging material, which comprises the following steps of S1: selecting 20-40 parts of purified water, 15-28 parts of gel, 6-10 parts of calcium carbonate, 8-13 parts of oxidized asphalt, 10-16 parts of bone glue, 4-9 parts of polyurethane, 3-7 parts of silicon dioxide, 2-6 parts of bentonite, 2-5 parts of carboxymethyl cellulose and 1-3 parts of urea, and relating to the technical field of temporary plugging and preparation. According to the process for producing the shale gas temporary plugging material, calcium carbonate, pitch oxide, silicon dioxide and bentonite are added during preparation, so that the strength of the temporary plugging material is remarkably increased, the temporary plugging material is durable and the plugging effect is guaranteed, a layer of protective glue is formed on the temporary plugging material by adding polyurethane and carboxymethyl cellulose, the surface of the temporary plugging material is well protected, the surface layer of the temporary plugging material is not easy to scour, the surface layer can be quickly broken when the temporary plugging material needs to be dredged, the dredging efficiency is improved, meanwhile, the production process of the temporary plugging material is simple and feasible in preparation steps, the preparation efficiency is high, and the temporary plugging material is convenient to popularize.)

1. A process for producing a shale gas temporary plugging material is characterized by comprising the following steps:

s1, selecting materials: selecting 20-40 parts of purified water, 15-28 parts of gel, 6-10 parts of calcium carbonate, 8-13 parts of oxidized asphalt, 10-16 parts of bone glue, 4-9 parts of polyurethane, 3-7 parts of silicon dioxide, 2-6 parts of bentonite, 2-5 parts of carboxymethyl cellulose and 1-3 parts of urea;

s2, adding the bone glue into a heating and stirring pot filled with purified water, fully stirring the mixture for 5-10min, controlling the rotating speed at 120r/min and the temperature at 70-90 ℃ to obtain a bone glue solution, and storing the bone glue solution in a sealed container after preparing the bone glue solution;

s3, adding polyurethane and carboxymethyl cellulose into another heating and stirring pot, fully stirring for 2-4min, controlling the rotating speed at 70-90r/min, controlling the temperature at 100-120 ℃, and storing the surface protection mixed solution in a sealed container, wherein the storage temperature is controlled at 5-15 ℃;

s4, adding the oxidized asphalt into a grinding mill, fully grinding the oxidized asphalt to 100-;

s5, adding calcium carbonate, bentonite, silicon dioxide and urea into a mixing stirrer, fully stirring the mixture for 5-10min, controlling the rotating speed to be 200-300r/min, after the stirring is finished, adding the bone glue solution prepared in S2, the asphalt fluid prepared in S4, the gel agent selected in S1 and purified water into the mixing stirrer, stirring the mixture for 10-15min, controlling the rotating speed to be 150-220r/min, controlling the temperature to be 200-300 ℃, obtaining a temporary plugging material after the stirring is finished, storing the temporary plugging material in a sealed container, and controlling the storage temperature to be 10-15 ℃;

and S6, filling the temporary plugging material in the position to be plugged in the using process, after the temporary plugging material is solidified, uniformly coating the surface protection mixed solution prepared in the step S3 on the surface of the temporary plugging material to form the shale gas temporary plugging material, and spraying the gel breaker on the surface of the temporary plugging material when the temporary plugging material needs to be melted.

2. The process for producing shale gas temporary plugging material according to claim 1, wherein: the raw materials comprise the following components: 20 parts of purified water, 15 parts of gel, 10 parts of calcium carbonate, 13 parts of oxidized asphalt, 16 parts of bone glue, 9 parts of polyurethane, 7 parts of silicon dioxide, 6 parts of bentonite, 5 parts of carboxymethyl cellulose and 3 parts of urea.

3. The process for producing shale gas temporary plugging material according to claim 1, wherein: the raw materials comprise the following components: 30 parts of purified water, 22 parts of gel, 8 parts of calcium carbonate, 10 parts of oxidized asphalt, 13 parts of bone glue, 7 parts of polyurethane, 5 parts of silicon dioxide, 4 parts of bentonite, 3 parts of carboxymethyl cellulose and 2 parts of urea.

4. The process for producing shale gas temporary plugging material according to claim 1, wherein: the raw materials comprise the following components: 40 parts of purified water, 28 parts of gel, 6 parts of calcium carbonate, 8 parts of oxidized asphalt, 10 parts of bone glue, 4 parts of polyurethane, 3 parts of silicon dioxide, 2 parts of bentonite, 2 parts of carboxymethyl cellulose and 1 part of urea.

5. The process for producing shale gas temporary plugging material according to claim 1, wherein: the amount of the purified water added into the heating and stirring pot in the step S2 is half of the amount of the purified water in the step S1, and the amount of the purified water added in the step S5 is the remaining total amount of the purified water.

6. The process for producing shale gas temporary plugging material according to claim 1, wherein: the gel breaker in the step S5 is a mixture of potassium sulfate and ammonium persulfate, and the calcium carbonate is ultrafine calcium carbonate with the specification of 40-500 meshes.

Technical Field

The invention relates to the technical field of temporary plugging, namely preparation, in particular to a process for producing a shale gas temporary plugging material.

Background

The shale gas is unconventional natural gas which is attached to a reservoir rock system mainly containing organic shale, is biochemical cause gas, thermal cause gas or a mixture of the biochemical cause gas and the thermal cause gas which are continuously generated, can exist in natural cracks and pores in a free state, exists on the surfaces of kerogen and clay particles in an adsorption state, and is also stored in the kerogen and asphaltene in a dissolving state in a very small amount, the proportion of the free gas is generally 20-85 percent, and the temporary plugging agent can temporarily reduce the stratum permeability or temporarily plug substances of a high-permeability oil layer. After being mixed with water-soluble polymer, the mixture is injected into a well, a thin and compact temporary plugging zone of an oil layer can be quickly formed under the action of pressure difference, the temporary plugging zone can be automatically or manually unblocked after a certain time, and temporary plugging materials are frequently needed when shale gas operation is carried out.

The technology of stifled material is temporarily blocked to tradition production shale gas, the stifled material intensity of the temporary that makes is not up to standard, when using, is broken easily by ambient pressure to can't reach the shutoff effect, do not have the stifled material of temporary to set up the one deck protection glue, make the stifled material top layer of temporary to be washed away easily, when needs are dredged, unable quick will prevent that the stifled layer breaks open, the stifled material production technology preparation step of temporary that has now simultaneously is numerous and diverse, the preparation efficiency is low, the cost of manufacture is high, not convenient for promote.

Disclosure of Invention

Technical problem to be solved

Aiming at the defects of the prior art, the invention provides a process for producing a temporary plugging material of shale gas, and solves the problems that the strength of the temporary plugging material of the prior process for producing the temporary plugging material of shale gas cannot meet the requirement, the temporary plugging material cannot be quickly dredged, the manufacturing cost is high, and the manufacturing steps are complex.

(II) technical scheme

Based on the technical problems in the background art, the invention provides a process for producing a shale gas temporary plugging material, which comprises the following steps:

s1, selecting materials: selecting 20-40 parts of purified water, 15-28 parts of gel, 6-10 parts of calcium carbonate, 8-13 parts of oxidized asphalt, 10-16 parts of bone glue, 4-9 parts of polyurethane, 3-7 parts of silicon dioxide, 2-6 parts of bentonite, 2-5 parts of carboxymethyl cellulose and 1-3 parts of urea;

s2, adding the bone glue into a heating and stirring pot filled with purified water, fully stirring the mixture for 5-10min, controlling the rotating speed at 120r/min and the temperature at 70-90 ℃ to obtain a bone glue solution, and storing the bone glue solution in a sealed container after preparing the bone glue solution;

s3, adding polyurethane and carboxymethyl cellulose into another heating and stirring pot, fully stirring for 2-4min, controlling the rotating speed at 70-90r/min, controlling the temperature at 100-120 ℃, and storing the surface protection mixed solution in a sealed container, wherein the storage temperature is controlled at 5-15 ℃;

s4, adding the oxidized asphalt into a grinding mill, fully grinding the oxidized asphalt to 100-;

s5, adding calcium carbonate, bentonite, silicon dioxide and urea into a mixing stirrer, fully stirring the mixture for 5-10min, controlling the rotating speed to be 200-300r/min, after the stirring is finished, adding the bone glue solution prepared in S2, the asphalt fluid prepared in S4, the gel agent selected in S1 and purified water into the mixing stirrer, stirring the mixture for 10-15min, controlling the rotating speed to be 150-220r/min, controlling the temperature to be 200-300 ℃, obtaining a temporary plugging material after the stirring is finished, storing the temporary plugging material in a sealed container, and controlling the storage temperature to be 10-15 ℃;

and S6, filling the temporary plugging material in the position to be plugged in the using process, after the temporary plugging material is solidified, uniformly coating the surface protection mixed solution prepared in the step S3 on the surface of the temporary plugging material to form the shale gas temporary plugging material, and spraying the gel breaker on the surface of the temporary plugging material when the temporary plugging material needs to be melted.

Preferably, the raw materials comprise the following components: 20 parts of purified water, 15 parts of gel, 10 parts of calcium carbonate, 13 parts of oxidized asphalt, 16 parts of bone glue, 9 parts of polyurethane, 7 parts of silicon dioxide, 6 parts of bentonite, 5 parts of carboxymethyl cellulose and 3 parts of urea.

Preferably, the raw materials comprise the following components: 30 parts of purified water, 22 parts of gel, 8 parts of calcium carbonate, 10 parts of oxidized asphalt, 13 parts of bone glue, 7 parts of polyurethane, 5 parts of silicon dioxide, 4 parts of bentonite, 3 parts of carboxymethyl cellulose and 2 parts of urea.

Preferably, the raw materials comprise the following components: 40 parts of purified water, 28 parts of gel, 6 parts of calcium carbonate, 8 parts of oxidized asphalt, 10 parts of bone glue, 4 parts of polyurethane, 3 parts of silicon dioxide, 2 parts of bentonite, 2 parts of carboxymethyl cellulose and 1 part of urea.

Preferably, the purified water added in the step S2 is half of the purified water in the step S1, and the purified water added in the step S5 is the remaining total purified water.

Preferably, the gel breaker in step S5 is a mixture of potassium sulfate and ammonium persulfate, and the calcium carbonate is ultrafine calcium carbonate with a specification of 40-500 meshes.

(III) advantageous effects

The invention provides a process for producing a shale gas temporary plugging material. The method has the following beneficial effects: the process for producing the shale gas temporary plugging material comprises the following steps of S1: selecting 20-40 parts of purified water, 15-28 parts of gelling agent, 6-10 parts of calcium carbonate, 8-13 parts of oxidized asphalt, 10-16 parts of bone glue, 4-9 parts of polyurethane, 3-7 parts of silicon dioxide, 2-6 parts of bentonite, 2-5 parts of carboxymethyl cellulose and 1-3 parts of urea, S2, adding the bone glue into a heating and stirring pot containing the purified water, fully stirring the bone glue, S3, adding the polyurethane and the carboxymethyl cellulose into another heating and stirring pot, fully stirring the mixture, S4, adding the oxidized asphalt into a grinding machine, fully grinding the oxidized asphalt to 100 plus 200, S5, adding the calcium carbonate, the bentonite, the silicon dioxide and the urea into a mixing and stirring machine, fully stirring the mixture, S5, filling temporary plugging material at the position to be plugged in the using process, after the temporary plugging material is solidified, the surface protection mixed solution prepared in S3 is uniformly coated on the surface of the temporary plugging material, calcium carbonate, pitch oxide, silicon dioxide and bentonite are added during preparation, so that the strength of the temporary plugging material is obviously improved, the temporary plugging material is durable in use and the plugging effect is ensured, a layer of protective glue is formed on the temporary plugging material by adding polyurethane and carboxymethyl cellulose, the surface of the temporary plugging material is well protected, the surface layer of the temporary plugging material is not easy to wash, the surface layer can be quickly broken when the temporary plugging material needs to be dredged, the dredging efficiency is improved, meanwhile, the temporary plugging material is simple and easy in production process, high in preparation efficiency, low in manufacturing cost and convenient to popularize.

Drawings

FIG. 1 is a statistical table of comparative experimental data according to the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings 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 of the 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.

Referring to fig. 1, the embodiment of the present invention provides three technical solutions: a process for producing a shale gas temporary plugging material specifically comprises the following embodiments: