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

A micro-nano channel oil-water responsive membrane material, preparation method and application thereof

A response membrane, micro-nano technology, applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve the problems of reduced plugging effect, variable and complex fracture width, and uneven fracture length, so as to improve the effectiveness and Reliability, strong adaptability to reservoir conditions, and the effect of reducing injection difficulty

Active Publication Date: 2022-06-17
CHINA UNIV OF PETROLEUM (EAST CHINA)
View PDF16 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Although the above-mentioned existing cross-linked gel particle plugging technology has a good effect in the plugging of large channels with high water content, there are two limitations in the application of large-scale volume fracturing construction: first, due to the The fracture width is variable and complex, and the fracture length is not uniform, which makes it difficult to match the gel particle size with the reservoir fracture, and the construction technology is difficult to realize.
If the particle size of the gel particle is too large, it will increase the difficulty of its migration, so that it can only be used to plug large fractures near the wellbore; on the contrary, if the particle size is too small, it will affect the particle accumulation and reduce the plugging effect

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

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A micro-nano channel oil-water responsive membrane material, preparation method and application thereof
  • A micro-nano channel oil-water responsive membrane material, preparation method and application thereof
  • A micro-nano channel oil-water responsive membrane material, preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0122] A preparation method of micro-nano particles for forming a micro-nano channel intelligent valve membrane with controllable deep expansion-shrinkage, comprising the following steps:

[0123] (1) Use deionized water to prepare 2% mass concentration of sodium alginate (MW~90kDa) solution for standby; use deionized water to prepare 50% mass concentration APS and 50% mass concentration TEMED solution for standby use;

[0124] (2) Put 0.55g of acrylamide, 0.5g of vinylpyrrolidone, 0.06mg of methylenebisacrylamide, 1.5mg of chromium acetate and 0.03g of SDS into 1.2ml of sodium alginate solution, and use a homogenizer for high-speed stirring ( 10000rpm, 2 minutes) to prepare an aqueous solution, and adjust the pH to 5.5;

[0125] (3) Mix the aqueous phase solution with 0.005ml APS solution, 0.0025ml TEMED solution, 0.035g Pluronics F127, 0.015g Span80, 80ml n-decane, 5ml octane, and use a homogenizer to stir at high speed (10000rpm, 2 minutes) to form a stable microemulsion ....

Embodiment 2

[0128] A preparation method of micro-nano particles for forming a micro-nano channel intelligent valve membrane with controllable deep expansion-shrinkage, comprising the following steps:

[0129] (1) Use deionized water to prepare 2% mass concentration of sodium alginate (MW~90kDa) solution for standby; use deionized water to prepare 50% mass concentration APS and 50% mass concentration KPS solution for standby use;

[0130] (2) Put 0.5g acrylamide, 0.75g vinylpyrrolidone, 0.08mg methylenebisacrylamide, 0.024ml zirconium acetate (16% concentration solution), 0.03g SDS, 0.01ml Tween40 into 3ml sodium alginate solution , use a homogenizer to perform high-speed stirring (10000rpm, 2 minutes) to obtain an aqueous solution, and adjust the pH to 5.5;

[0131] (3) Mix the aqueous phase solution with 0.003ml APS solution, 0.001ml KPS solution, 0.05g Pluronics F127, 0.03g Span80, 120ml n-decane, 7ml cyclohexane, and use a homogenizer to stir at high speed (10000rpm, 2 minutes) to form...

Embodiment 3

[0134] A method for preparing a supramolecular fluid dispersion for forming a micro-nano-channel smart valve membrane with controllable deep expansion and contraction, comprising the following steps:

[0135] (1) Use deionized water to prepare 2% mass concentration of sodium alginate (MW~90kDa) solution for standby; use deionized water to prepare 50% mass concentration APS and 50% mass concentration KPS solution for standby use;

[0136] (2) Dissolve 0.2g of chromium acetate and 2ml of zirconium acetate (16% concentration solution) in 5ml of deionized water to saturation, heat to 80°C, add 2g of hot paraffin solution, mix and stir, and cool to form paraffin solid after 5 minutes. It is dried and ground to obtain a cross-linking agent intermediate product;

[0137] (3) Put 0.5g acrylamide, 0.75g vinylpyrrolidone and 0.05ml Tween40 into 2.5ml sodium alginate solution, use a homogenizer to stir at high speed (10000rpm, 2 minutes) to prepare an aqueous solution, adjust pH to 6.0;...

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 diameteraaaaaaaaaa
viscosityaaaaaaaaaa
particle diameteraaaaaaaaaa
Login to View More

Abstract

The invention relates to the field of petroleum exploitation, and discloses a micro-nano channel oil-water responsive membrane material, a preparation method and an application thereof. The membrane material comprises acrylamide, vinylpyrrolidone and a cross-linking agent capable of delaying cross-linking. The membrane material provided by the present invention is formed by injecting micro-nano particles or supramolecular fluids on the surface of reservoir fractures or channels through a re-crosslinking process to form a layer of micro-nano "valve" that is sensitive to the oil-water ratio in cracks or channels and has controllable water absorption. "membrane to regulate the oil-water flow in the fracture or channel, to realize the "flow restriction" of the high water content channel and the "opening" of the oil channel, and the "flow restriction" and "opening" functions can be changed with the oil-water ratio in the fracture or channel A reversible transformation occurs.

Description

technical field [0001] The invention relates to a micro-nano pore oil-water responsive membrane material, a preparation method and an application thereof, and belongs to the technical field of petroleum exploitation. Background technique [0002] The mine practice in recent years shows that the development of low-permeability tight oil horizontal wells in my country generally has problems such as low single-well production, rapid decline rate and difficulty in stabilizing production. The cost-effective development of low-permeability and tight oil reservoirs is a long-term and important task. Today, the reservoir stimulation technology mainly based on horizontal well drilling technology and hydraulic fracturing is the key technology to realize the efficient development of such unconventional oilfields. For unconventional oil reservoirs, the effect of fracturing mainly depends on whether the fracturing fractures can effectively communicate with the target oil and gas areas, ...

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
Patent Type & Authority Patents(China)
IPC IPC(8): C08F220/56C08F226/10C08F222/38C09K8/512C09K8/514C09K8/588C09K8/88C09K8/90
CPCC09K8/512C09K8/514C09K8/588C09K8/887C09K8/905C08F220/56C08F226/10C09K2208/10C08F222/385
Inventor 罗明良蒲景阳战永平吴飞鹏刘静张娜
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)