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Three-phase foam channel-sealing agent, preparation method thereof, and thickened oil exploiting and plugging method

A channel sealing agent and foam technology, applied in the direction of chemical instruments and methods, drilling compositions, etc., can solve the problems of long-term stable use, poor high temperature resistance, etc., and achieve high-efficiency plugging depth profile control and good stability , the effect of reducing pollution

Active Publication Date: 2019-07-05
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The channel sealing agent has good water blocking performance, but its high temperature resistance is poor, so it cannot be used stably for a long time

Method used

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  • Three-phase foam channel-sealing agent, preparation method thereof, and thickened oil exploiting and plugging method
  • Three-phase foam channel-sealing agent, preparation method thereof, and thickened oil exploiting and plugging method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The three-phase foam blocking agent of this embodiment is composed of the following components in weight percent: 0.3% sodium lauryl sulfate, 3% α-starch, 3% acrylamide, 0.02% potassium persulfate, N,N- 0.1% methylene bisacrylamide, 0.2% sodium sulfite, 0.5% solid phase particles, and the balance is water.

[0029] The solid-phase particles are a mixture of fly ash, Portland cement and resin-coated particles, and the mass ratio of fly ash, Portland cement and resin-coated particles is 1:4:1.25.

[0030] The preparation method of the three-phase foam blocking agent of the present embodiment comprises the following steps:

[0031] 1) Mix the α-starch, acrylamide, potassium persulfate, N,N-methylene bisacrylamide, sodium sulfite and 1 / 2 of the total water, stir until gelatinization is complete, and stand at 80°C for 40 minutes to obtain Starch gel system; dissolving the sodium lauryl sulfate in the formula amount in the remaining water, and then adding solid phase granule...

Embodiment 2

[0035] The three-phase foam blocking agent of this embodiment is composed of the following components in weight percent: 0.3% sodium lauryl sulfate, 3.5% α-starch, 4% acrylamide, 0.01% potassium persulfate, N,N- 0.15% methylene bisacrylamide, 0.1% sodium sulfite, 15% solid particles, and the balance is water.

[0036] The solid-phase particles are a mixture of fly ash, Portland cement and resin-coated particles, and the mass ratio of fly ash, Portland cement and resin-coated particles is 1:4:3.

[0037] The preparation method of the three-phase foam blocking agent of the present embodiment comprises the following steps:

[0038] 1) Mix α-starch, acrylamide, potassium persulfate, N,N-methylene bisacrylamide, sodium sulfite and 4 / 5 of the total water, stir until gelatinization is complete, and stand at 80°C for 30 minutes to obtain Starch gel system; dissolving the sodium lauryl sulfate in the formula amount in the remaining water, and then adding solid phase granules to obtain...

Embodiment 3

[0042] The three-phase foam blocking agent of this embodiment is composed of the following components in percentage by weight: sodium lauryl sulfate 0.3%, α-starch 4%, acrylamide 3.5%, potassium persulfate 0.015%, N,N- 0.12% methylene bisacrylamide, 0.15% sodium sulfite, 30% solid particles, and the balance is water.

[0043] The solid-phase particles are a mixture of fly ash, Portland cement and resin-coated particles, and the mass ratio of fly ash, Portland cement and resin-coated particles is 1:4:5.

[0044] The preparation method of the three-phase foam blocking agent of the present embodiment comprises the following steps:

[0045] 1) Mix α-starch, acrylamide, potassium persulfate, N,N-methylene bisacrylamide, sodium sulfite and 3 / 5 of the total water, stir until gelatinization is complete, and stand at 80°C for 60 minutes to obtain Starch gel system; dissolving the sodium lauryl sulfate in the formula amount in the remaining water, and then adding solid phase granules to ...

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Abstract

The invention discloses a three-phase foam channel-sealing agent and a preparation method thereof, and a thickened oil exploiting and plugging method by adopting the three-phase foam channel-sealing agent, and belongs to the technical field of oil field chemistry. The three-phase foam channel-sealing agent consists of the following components in percentage by weight: 0.3% of a foaming agent, 3-4%of alpha-starch, 3%-4% of acrylamide, 0.01%-0.02% of an initiator, 0.1%-0.15% of a cross-linking agent, 0.1%-0.2% of a control agent, 0.5%-30% of solid-phase particles and the balance of water. The three-phase foam channel-sealing agent disclosed by the invention is injected into steam channeling pore channels, steam huff and puff is carried out after foam forms gel, the gel is carbonized when encountering steam, and solid particles are left to block the channeling channels. Plugging efficiency is high, permeability is adjustable, a problem of serious steam channeling can be well solved, and the recovery rate of crude oil is improved.

Description

technical field [0001] The present invention relates to a three-phase foam channeling agent, and also relates to a preparation method of the three-phase foam channeling agent, and also relates to a heavy oil mining plugging adjustment method using the three-phase foam channeling agent, which belongs to oil field chemical technology field. Background technique [0002] With the development of industry, the contradiction between the social demand for oil and the serious shortage of oil resources has become increasingly serious. How to extract more oil from the developed oil fields has become a technical problem for petroleum experts. At present, in the thermal recovery of heavy oil, after more than ten years of steam huff and puff production in oil reservoirs, most of the huff and puff wells have entered the stage of high cycle huff and puff. After steam injection huff and puff in heavy oil reservoirs, the porosity and permeability change. With the increase of huff and puff...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K8/514C09K8/512C09K8/508C09K8/518C09K8/90C09K8/88C09K8/94
CPCC09K8/5083C09K8/512C09K8/514C09K8/518C09K8/882C09K8/887C09K8/905C09K8/94
Inventor 徐丽娜彭元东方舒王登辉毕长会马道祥王若浩王端哲何先萍崔跃利白新潮
Owner CHINA PETROLEUM & CHEM CORP
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