Unlock instant, AI-driven research and patent intelligence for your innovation.

Composition with selective water plugging function as well as preparation method and application thereof

A composition and selective technology, applied in drilling compositions, chemical instruments and methods, etc., can solve problems such as poor selectivity, low liquid, and reduced oil phase permeability

Active Publication Date: 2018-11-02
CHINA PETROLEUM & CHEM CORP +1
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] To sum up, most of the selective plugging agents currently used in oil well water plugging are water-soluble polymers such as polyacrylamide and its derivatives to generate gel or jelly in the formation to seal formation water, or use oil The base plugging agent gels or solidifies when it meets water to block water channeling. However, due to its poor selectivity, it will greatly reduce the oil phase permeability while blocking water, resulting in low liquid after plugging, which restricts the application of oil well water plugging technology.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0037] In the second aspect, the present invention also provides a method for preparing a composition with selective water blocking function, the method comprising: mixing an oil-soluble resin, a main emulsifier and a surface-active polymer with water.

[0038] In the present invention, the material with selective water blocking function can be obtained by mixing the above-mentioned components, but mixing the components in a certain order can further improve its water blocking performance, therefore, in a preferred implementation of the present invention In the mode, the present invention also provides a preparation method of a composition having a selective water blocking function, the preparation method comprising the following steps:

[0039] (1) mixing the surface-active polymer with water to form an aqueous solution;

[0040] (2) mixing the main emulsifier with the aqueous solution to form an emulsion;

[0041] (3) mixing the oil-soluble resin with the emulsion;

[0042...

Embodiment 1

[0075] This example is used to illustrate the composition with selective water blocking function provided by the present invention.

[0076] 1. Weigh 0.03g of surface-active polymer and add it to 100mL of water, and fully stir (600r / min) at 20°C for 1 hour to form an aqueous solution;

[0077] 2. Weigh 1g of sodium dodecylbenzene sulfonate and 0.5g of Span 60 into the above aqueous solution in turn, and stir fully at 20°C (600r / min) for 3 hours to form a stable emulsion;

[0078] 3. Weigh 1g of oil-soluble phenolic resin (particle size 3-50μm) and add it to the above-mentioned emulsion, and fully stir (600r / min) at 20°C for 1 hour to form a stable emulsion-suspended water blocking material A1.

[0079] After testing, under the conditions of high temperature (90°C) and high salt (salinity: 50,000mg / L), the water shutoff rate of water shutoff material A1 is 94.21%, the oil shutoff rate is 4.52%, and the erosion resistance multiple is greater than 50PV . This shows that the wat...

Embodiment 2

[0081] This example is used to illustrate the composition with selective water blocking function provided by the present invention.

[0082] 1. Weigh 0.01g of surface-active polymer and add it to 100mL of water, and fully stir (600r / min) at 20°C for 6h to form an aqueous solution;

[0083] 2. Weigh 5g of sodium dodecylsulfonate and 1g of Tween 60, respectively, and add them to the above aqueous solution in turn, and stir at 30°C (600r / min) for 1 hour to form a stable emulsion;

[0084] 3. Weigh 10g of petroleum resin (particle size: 3-50μm) and add it to the above emulsion. After fully stirring (600r / min) at 50°C for 2 hours, a stable emulsion-suspended water blocking material A2 is formed.

[0085] After testing, under the conditions of high temperature (90°C) and high salt (salinity: 80,000mg / L), the water shutoff rate of water shutoff material A2 is 99.23%, the oil shutoff rate is 5.62%, and the erosion resistance multiple is greater than 50PV . This shows that the water ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
Particle sizeaaaaaaaaaa
Surface tensionaaaaaaaaaa
Salinityaaaaaaaaaa
Login to View More

Abstract

The invention relates to the field of water plugging materials, and discloses a composition with a selective water plugging function and a preparation method, as well as the composition prepared according to the method and application thereof. Specifically, the composition comprises oil soluble resin, a main emulsifying agent and a surface active polymer, wherein the oil soluble resin is selectedfrom one or more of rosin resin, gum dammar, oil-soluble phenolic resin, petroleum resin, terpene resin and coumarone resin; the main emulsifying agent is selected from a compound shown in a formula (I) and / or a compound shown in a formula (II). The composition with the selective water plugging function is good in water plugging and oil releasing effects, and has temperature resisting and salt resisting performances and scouring resisting function; the composition is greatly applicable to high temperature and high salt selection criteria of reservoirs. R1O-SO3-M1 (formula I); R2-SO3-M2 (formula II).

Description

technical field [0001] The invention relates to the field of water shutoff materials, in particular to a composition with selective water shutoff function and a preparation method thereof, as well as the composition prepared by the method and its application. Background technique [0002] Polymer water shutoff materials are currently widely used water shutoff agents, which are mainly divided into polymer phase permeability regulators and polymer gel water shutoff agents. The main difference between the two is that the interpenetration modifier is mainly a long-chain polymer molecule, relying on the polymer molecular chain to stretch in the water phase and shrink in the oil phase, forming a dragging effect on the water phase and reducing the water phase penetration rate, the system will not cause physical plugging of pore volume, but the water plugging strength is not enough and the erosion resistance is poor. The polymer gel water shutoff agent uses the change of the effect...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C09K8/514C09K8/506C09K8/508
CPCC09K8/506C09K8/5086C09K8/514
Inventor 赵方园王晓春杨捷
Owner CHINA PETROLEUM & CHEM CORP