A kind of three-phase foam blocking channeling agent and its preparation method, heavy oil recovery plugging adjustment method
A technology of sealing channeling agent and foam, applied in chemical instruments and methods, drilling compositions, etc., can solve the problems of long-term stable use, poor high temperature resistance, etc., and achieve adjustable permeability, good stability, enhanced hydrophobic effect
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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
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