Profile adjusting and water plugging agent and application, profile adjusting and water plugging system and preparation method and application thereof
A profile control water shutoff agent and a profile control water shutoff technology, applied in chemical instruments and methods, drilling compositions, etc., can solve the problems of limited water shutoff profile control effect, reduced water thickening performance, poor long-term stability, etc. , to achieve the effects of reduced environmental sensitivity, long-term stability, improved plugging strength, and low cost
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[0083] According to a third aspect of the present invention, the present invention provides a preparation method for the above-mentioned profile control and water shutoff system, comprising the following steps:
[0084] (a) adding the activator and any regulator into the water and mixing uniformly, then adding the inorganic nanoparticles into the water, mixing uniformly to obtain a dispersion solution;
[0085] (b) Add the amphiphilic polymer and the optional oxygen scavenger into the dispersion solution, mix evenly, then add the crosslinking agent, mix evenly, and obtain the profile control and water shutoff system.
[0086] The preparation method of the profile control and water shutoff system provided by the invention has the advantages of simple process, easy-to-obtain raw materials and convenient operation, and has broad application prospects in oil field development.
[0087] In a further preferred embodiment of the present invention, in step (b), the amphiphilic polymer...
Embodiment 1
[0093] This embodiment provides a profile control water shutoff agent, its raw materials include the following raw materials in parts by mass: 0.5g temperature-increasing amphiphilic polymer, 0.5g SiO 2 Particles (50nm in particle size), 0.1g ethylenediaminetetraacetic acid, 0.2g sodium dodecanoate, 0.015g sodium sulfite and 1g phenolic resin crosslinking agent;
[0094]Wherein the molecular structural formula of temperature-increasing amphiphilic polymer is:
[0095]
[0096] a is 60-80, b is 10-20, c is 20-30, n is 1000-1500;
[0097] The weight-average molecular weight of the warm-tackifying amphiphilic polymer is 2×10 6 .
Embodiment 2
[0099] This embodiment provides a profile control water shutoff agent, its raw materials include the following raw materials in parts by mass: 0.2g salt thickening amphiphilic polymer, 1.5g SiO 2 Particles (particle size is 40nm), 0.5g ethylenediaminetetraacetic acid, 1g sodium dodecanoate, 0.005g sodium sulfite and 0.1g organic chromium crosslinking agent;
[0100] Wherein, the structural formula of salt thickening amphiphilic polymer is:
[0101]
[0102] x is 80-200, y is 4-30, z is 1-5;
[0103] The weight-average molecular weight of the salt-adhesive amphiphilic polymer is 3.58×10 6 .
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