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Interpenetrating polymer network jelly and preparation method and application thereof

A technology of polymer and jelly, applied in drilling compositions, chemical instruments and methods, etc., can solve the problems of inability to withstand formation water scouring, affecting the effect of plugging agents, shortening gel time, etc. Good blocking effect, good blocking ability and wide temperature adaptability

Active Publication Date: 2017-05-10
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this kind of gel is sensitive to temperature. In a temperature environment below 40°C, the gelation time is longer, but as the temperature rises, the gelation time will be shortened sharply, and it will quickly form a gel without stickiness at high temperature. , which affects the effect of the plugging agent on the deeper formation and the far well zone
At the same time, the gel is easily broken by external force and cannot withstand the erosion of formation water

Method used

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  • Interpenetrating polymer network jelly and preparation method and application thereof
  • Interpenetrating polymer network jelly and preparation method and application thereof
  • Interpenetrating polymer network jelly and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] Example 1: Preparation of interpenetrating polymer network jelly with different polyacrylamide mass concentrations

[0051] Prepare 4 sets of interpenetrating polymer network jelly gels, the mass concentrations of PAM are 0.8%, 1.0%, 1.2%, 1.4%, water-soluble phenolic resin 0.9wt%, acrylamide 7.0wt%, starch 3.0wt% %, ammonium persulfate 0.1wt%, N,N-methylenebisacrylamide 0.04wt%, the preparation method is as follows:

[0052] (1) Weigh 47.7g of distilled water, draw 0.8g, 1.0g, 1.2g, and 1.4g of polyacrylamide dropwise along the tangential direction with a syringe according to the ratio during stirring, and add water-soluble 0.9 g of phenolic resin.

[0053] (2) Weigh 40g of each of the four groups of distilled water, dissolve 3g of starch in the four groups of boiling water, stir until completely dissolved, then cool to room temperature and then add 7g of acrylamide, 0.1g of ammonium persulfate and 0.04g of N to each group according to the proportion, N-methylenebisa...

Embodiment 2

[0058] Example 2: Preparation of interpenetrating polymer network gels with different acrylamide mass concentrations

[0059] Prepare 4 sets of interpenetrating polymer network jelly gel solutions, the mass concentrations of acrylamide are 5%, 6%, 7%, 8%, polyacrylamide 1.4wt%, water-soluble phenolic resin 0.9wt%, starch 3.0wt%, ammonium persulfate 0.1wt%, N,N-methylenebisacrylamide 0.04wt%, the preparation method is as follows:

[0060] (1) Weigh 47.7g of four groups of distilled water, draw 1.4g of polyacrylamide with a syringe according to the ratio during the stirring process and drop them in along the tangential direction, stir evenly and add 0.9g of water-soluble phenolic resin to each group according to the ratio.

[0061] (2) Weigh 40g of each of the four groups of distilled water, dissolve 3g of starch in the four groups of boiling water, stir until completely dissolved, then cool to room temperature and then add 5g, 6g, 7g, 8g of acrylamide and 0.1g of supernatant to...

Embodiment 3

[0067] Example 3: Changes in gelation time of interpenetrating polymer network jelly under different temperature environments

[0068] Prepare 7 groups of interpenetrating polymer network jelly gels, polyacrylamide 1.4wt%, water-soluble phenolic resin 0.9wt%, starch 3.0wt%, acrylamide mass concentration 7%, ammonium persulfate 0.1wt %, N,N-methylenebisacrylamide 0.04wt%, the preparation method is as follows:

[0069] (1) Weigh 47.7g of 7 groups of distilled water, and add 1.4g of polyacrylamide dropwise with a syringe along the tangential direction during the stirring process, and add 0.9g of water-soluble phenolic resin to each group according to the ratio after stirring evenly.

[0070] (2) Weigh 40g of 7 groups of distilled water, dissolve 3g of starch in 7 groups of boiling water, stir until completely dissolved, then cool to room temperature and add 7g of acrylamide, 0.1g of ammonium persulfate, 0.04g of N, N-methylenebisacrylamide ensures that all pharmaceuticals are co...

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Abstract

The invention relates to interpenetrating polymer network jelly and a preparation method and application thereof; the jelly is prepared by preparing jelly condensate from polyacrylamide, water-soluble phenol-formaldehyde resin, soluble starch, acrylamide, ammonium persulfate, N,N-methylenebisacrylamide and water, and gelling at 30-90 DEG C. The controllable gelling time of the interpenetrating polymer network jelly is 0.5-5 h under pH of 7-11 and mineralization degree of 0-17000 mg / L. The interpenetrating polymer network jelly is of phenol-formaldehyde resin crosslinked polyacrylamide and starch-acrylamide aqueous gel; under the synergy of the specific interpenetrating network structure and molecular chain, the jelly also has the high viscosity and high uniformity in the phenol-formaldehyde resin crosslinked polyacrylamide as well as the high strength and mineralization resistance in the starch-acrylamide aqueous jelly, and has good sealing capacity and washout resistance.

Description

technical field [0001] The invention relates to an interpenetrating polymer network jelly, a preparation method and application thereof, and belongs to the technical field of oil field profile control and water shutoff. Background technique [0002] Profile control and water shutoff agents have their own advantages, disadvantages and scope of application. In general, the existing plugging agents have the characteristics of single function, good applicability to conventional reservoirs, and poor applicability to complex oil and gas reservoirs. For example, the jelly-type plugging agent has high strength, can be deformed after being gelled, exhibits certain viscosity or elasticity, has limited performance in temperature resistance and salinity resistance, and poor injection performance, and is suitable for plugging and adjustment operations in high-porosity and high-permeability reservoirs . The gel-type plugging agent has high strength, excellent temperature resistance, sali...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/508C09K8/516C08F251/00C08F220/56C08F222/38C08J3/24
CPCC09K8/508C09K8/516C08F251/00C08J3/246C08F220/56C08F222/385
Inventor 齐宁高梦斐李柏杨田壮壮方明君翟恒来张翔宇孙逊樊家铖
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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