阅读说明：本技术 一种油田采油用高强度堵水剂及其制备方法 (High-strength water shutoff agent for oil extraction in oil field and preparation method thereof ) 是由 张帆 佟秋影 梁庆涵 于 2020-04-26 设计创作，主要内容包括：本发明公开了一种油田采油用高强度堵水剂及其制备方法,高强度堵水剂由OP-10、油溶性树脂和煤油复合而成,OP-10、油溶性树脂和煤油的质量份数配比为OP-105％、油溶性树脂80％和煤油15％,按照质量份数配比为OP-105％、油溶性树脂80％和煤油15％准备原材料,将原材料按比例混合后充分搅拌,将充分搅拌的混合物放在密闭的罐体中熟化60分钟,通过高压水泥车将高强度堵水剂注入需要封堵高渗透带油藏中,直至地面注入压力平衡,再提高压力注入常用堵水剂,所述常用堵水剂为水泥、凝胶和水玻璃。本发明首先突破的是高渗透带油藏,使其它堵水剂进入高渗透带油藏中,而高强度堵水剂在油井开采时,因有原油流动而溶解,从而达到堵水不堵油的目的。(The invention discloses a high-strength water shutoff agent for oil extraction in oil fields and a preparation method thereof, wherein the high-strength water shutoff agent is formed by compounding OP-10, oil-soluble resin and kerosene, wherein the mass part ratio of the OP-10, the oil-soluble resin and the kerosene is OP-105%, the mass part ratio of the oil-soluble resin is 80% and the mass part ratio of the kerosene is 15%, raw materials are prepared according to the mass part ratio of the OP-105%, the oil-soluble resin is 80% and the kerosene is 15%, the raw materials are mixed according to a certain proportion and then fully stirred, the fully stirred mixture is put in a closed tank body for curing for 60 minutes, the high-strength water shutoff agent is injected into an oil reservoir in a high-permeability zone needing to be plugged by a high-pressure cement truck until the injection pressure on the ground is balanced, and then the pressure is increased. The invention firstly breaks through that other water shutoff agents enter the high permeability zone oil deposit, and the high strength water shutoff agent is dissolved due to the flowing of crude oil when an oil well is exploited, thereby achieving the purpose of water shutoff and oil non-shutoff.)

1. The high-strength water shutoff agent for oil extraction in the oil field is characterized by being prepared by compounding OP-10, oil-soluble resin and kerosene, wherein the mass parts of the OP-10, the oil-soluble resin and the kerosene are OP-105%, 80% and 15%, and the OP-10 has the chemical formula of C₈H₁₇-C₆H₄-O-(CH₂CH₂O)₁₀H, the chemical formula of the oil-soluble resin is (C)₅H₁₆) n, the chemical formula of the kerosene is C₉H₂₀。

2. A preparation method of a high-strength water shutoff agent for oil extraction in an oil field comprises the following specific steps:

(1) preparing raw materials comprising OP-105%, 80% of oil-soluble resin and 15% of kerosene according to the mass portion ratio, grinding the oil-soluble resin into powder, mixing the raw materials in proportion and then fully stirring;

(2) the well stirred mixture was placed in a closed jar to age for 60 minutes.

3. The use method of the high-strength water shutoff agent for oil extraction in the oil field according to any one of claims 1 to 2, characterized in that the high-strength water shutoff agent is injected into the oil reservoir with high permeability to be plugged by a high-pressure cement truck until the injection pressure on the ground is balanced, and then the pressure is increased to inject the common water shutoff agent, wherein the common water shutoff agent is cement, gel and water glass.

Technical Field

The invention relates to the technical field of water shutoff agents, in particular to a high-strength water shutoff agent for oil extraction in an oil field and a preparation method thereof.

Background

In the process of oil field exploitation, some oil wells are exposed to water or flooded by water layer channeling, bottom water coning or injected water or edge water rushing. In order to eliminate or reduce water flooding, control the flow of water in a water producing layer and change the flow direction of water in water flooding, and improve the recovery ratio of water flooding, a chemical treatment agent adopted for plugging a water producing interval on a production well or an injection well is called a water plugging agent.

The construction technology is divided into selective water shutoff, non-selective water shutoff, water injection well profile control and block integral water shutoff, and the chemical agent structure and action mechanism are divided into (1) inorganic salts, such as sodium silicate and aluminum sulfate, sodium silicate and calcium chloride, sodium silicate and ferrous sulfate, sodium carbonate and calcium chloride and the like; (2) the polymer jelly glue, such as various jelly glue formed by polyacrylamide, polyacrylonitrile, lignosulfonate, biological polymerization and the like, is widely applied at present; (3) the resin water shutoff agent comprises phenolic resin, epoxy resin, furfural resin, thermoplastic polymer, polyethylene, ethylene-vinyl acetate copolymer and the like; (4) the foam profile control water shutoff agent comprises a foaming agent and various additives, and is matched with solid phase components of bentonite, powdery mildew and the like, for example, ABS is used as the foaming agent, carboxymethyl cellulose is used as a stabilizer, and bentonite is used as a solid phase to form the profile control agent; and a cationic surfactant water shutoff technology, a monosilane water shutoff technology, a silicic acid gel water shutoff technology and the like.

At present, a preposed water plugging agent which can be dissolved in crude oil and can plug water is lacked during oil well exploitation, and the purpose of plugging water and not plugging oil is achieved.

An effective solution to the problems in the related art has not been proposed yet.

Disclosure of Invention

The invention aims to provide a high-strength water shutoff agent for oil extraction in an oil field and a preparation method thereof, so as to solve the problems in the background technology.

In order to achieve the purpose, the invention provides the following technical scheme: the high-strength water shutoff agent for oil extraction in the oil field is prepared by compounding OP-10, oil-soluble resin and kerosene, wherein the mass parts of the OP-10, the oil-soluble resin and the kerosene are OP-105%, 80% and 15%, and the OP-10 has a chemical formula of C₈H₁₇-C₆H₄-O-(CH₂CH₂O)₁₀H, the chemical formula of the oil-soluble resin is (C)₅H₁₆) n, the chemical formula of the kerosene is C₉H₂₀。

A preparation method of a high-strength water shutoff agent for oil extraction in an oil field comprises the following specific steps:

(1) preparing raw materials comprising OP-105%, 80% of oil-soluble resin and 15% of kerosene according to the mass portion ratio, grinding the oil-soluble resin into powder, mixing the raw materials in proportion and then fully stirring;

(2) the well stirred mixture was placed in a closed jar to age for 60 minutes.

A method for using high-strength water shutoff agent for oil extraction in oil field includes injecting high-strength water shutoff agent into oil deposit in high-permeability zone to be plugged by high-pressure cement truck until injection pressure on ground is balanced, and then increasing pressure to inject common water shutoff agent which is cement, gel and water glass.

Compared with the prior art, the invention has the following beneficial effects:

(1) the invention firstly breaks through that other water shutoff agents enter the high permeability zone oil deposit, and the high strength water shutoff agent is dissolved due to the flowing of crude oil when an oil well is exploited, thereby achieving the purpose of water shutoff and oil non-shutoff.

Detailed Description

The invention will be further described with reference to specific embodiments:

according to the embodiment of the invention, the high-strength water shutoff agent for oil extraction in the oil field and the preparation method thereof are disclosed, the high-strength water shutoff agent is prepared by compounding OP-10, oil-soluble resin and kerosene, wherein the mass parts of the OP-10, the oil-soluble resin and the kerosene are OP-105%, 80% and 15%, and the OP-10 has a chemical formula of C₈H₁₇-C₆H₄-O-(CH₂CH₂O)₁₀H, the chemical formula of the oil-soluble resin is (C)₅H₁₆) n, the chemical formula of the kerosene is C₉H₂₀。

A preparation method of a high-strength water shutoff agent for oil extraction in an oil field comprises the following specific steps:

(1) preparing raw materials comprising OP-105%, 80% of oil-soluble resin and 15% of kerosene according to the mass portion ratio, grinding the oil-soluble resin into powder, mixing the raw materials in proportion and then fully stirring;

(2) the well stirred mixture was placed in a closed jar to age for 60 minutes.

When the high-strength water plugging agent is used specifically, the high-strength water plugging agent is injected into a high-permeability zone oil reservoir to be plugged through a high-pressure cement truck until the injection pressure on the ground is balanced, and then the pressure injection common water plugging agent is improved, wherein the common water plugging agent is cement, gel and water glass, so that the high-permeability zone oil reservoir is broken through firstly, other water plugging agents enter the high-permeability zone oil reservoir, and the high-strength water plugging agent is dissolved due to the flowing of crude oil during the exploitation of an oil well, so that the purpose of plugging water and not plugging oil is achieved.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that various changes, modifications and substitutions can be made without departing from the spirit and scope of the invention as defined by the appended claims. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.