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A technology of water blocking agent and mass ratio, applied in the field of water blocking agent preparation, can solve the problems of short gel time, low gel viscosity, weak high temperature resistance, etc., and achieve excellent solubility, tensile fracture stress and strain The effect of strong ability and strong adhesion
Inactive Publication Date: 2018-09-07
王建东
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[0005] The technical problem to be solved by the present invention: Aiming at the problems of weak high temperature resistance, poor erosion resistance, short gelation time and low gel viscosity in current water shutoff agents, a preparation method of water shutoff agents is provided
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preparation example Construction
[0016] A preparation method of water blocking agent, comprising the steps of:
[0017] (1) Take trimethylolpropane and add caprolactone at a mass ratio of 5:3, pass in nitrogen, heat up to 95~100°C and stir for 30~40min, then add octanoic acid with 10~15% trimethylolpropane mass Stannous, keep warm at 140~150°C for 3~4 hours, cool to obtain the cooling product, take the cooling product and add acetone at a mass ratio of 1:5, let it stand for 5~7 hours, discard the supernatant, distill under reduced pressure, and obtain the reduced pressure distillate;
[0018] (2) In terms of parts by mass, take 45~50 parts of vacuum distillate, 35~40 parts of 2,2-dimethylolpropionic acid, 0.2~0.5 parts of p-toluenesulfonic acid, feed nitrogen, and heat up to 140 Stir and mix at ~150°C for 3~5h to obtain a stirred mixture. In terms of parts by mass, take 4~7 parts of the stirred mixture, 8~10 parts of triethylamine, 50~60 parts of tetrahydrofuran, and 2~4 parts of methacryloyl chloride. Stir...
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Abstract
The invention discloses a preparation method of a water plugging agent, and belongs to the field of water plugging agents. The preparation method comprises the following steps: taking trimethylolpropane, adding caprolactone, introducing nitrogen, stirring and mixing; then adding stannous octoate and acetone, standing, removing supernate and carrying out reduced pressure distillation to obtain a reduced pressure distillation distillate; taking the reduced pressure distillation distillate, 2,2-dimethylolpropionic acid and p-toluene sulfonic acid, introducing nitrogen, heating, stirring and mixing; adding triethylamine, tetrahydrofuran and methacryloyl chloride, and carrying out stirring reaction, rotary evaporation and drying with anhydrous sodium sulfate; taking acrylamide, adding deionizedwater and dry matters, introducing nitrogen, then adding ceric ammonium nitrate and methacryloyloxyethyl trimethyl ammonium chloride, stirring, mixing, then adding acetone and methanol for stirring and mixing, and carrying out rotary evaporation to obtain a water plugging agent base material; taking starch, adding distilled water, mixing and pasting to obtain pasted liquid; taking the pasted liquid, acrylamide, azodiisobutyronitrile, N,N-methylene bisacrylamide, diethylamine, hydroxypropyl methyl cellulose, the water plugging agent base material, chromium chloride and oxalic acid for mixing to obtain the water plugging agent.
Description
technical field [0001] The invention belongs to the field of water shutoff agents, and in particular relates to a preparation method of water shutoff agents. Background technique [0002] In the process of oilfield exploitation, due to channeling of water layer, coning of bottom water or intrusion of water injection and edge water, some oil wells will see water prematurely or be flooded. In order to remove or reduce water flooding, control the flow of water in the water-producing layer and change the flow direction of water in water-flooding oil, and improve the recovery rate of water-flooding oil, the treatment used to seal the water-producing layer on the production well or injection well The agent is called water blocking agent. [0003] For a long time, all countries in the world have combined the geological characteristics of their own oilfields to seek effective water shutoff agents and their techniques. Water blocking technology can be divided into mechanical method...
Claims
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