Ternary composite block-resistant protection solution for drive injection well
A ternary compound, injection well technology, applied in drilling compositions, chemical instruments and methods, etc., can solve the difficulty of oil-water separation sewage treatment, can not effectively prevent silicate precipitation, prevent alkali and rock reaction, etc. The problem is to prevent water swelling, slow down chromatographic separation, and reduce adsorption retention.
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Embodiment 1
[0031] Organofluorine compounds, namely C 8 f 17 SO 2 NH(CH 2 ) 2 N + (CH 3 ) 2 CH 2 COOCH 2 (CF 2 ) 3 CH 2 OCOCH 2 N + (CH 3 ) 2 (CH 2 ) 2 NHSO 2 C 8 f 17 Synthesis of the method: in a 50mL three-necked flask equipped with a magnetic stirrer and a dropping funnel, add 10g of perfluorooctanesulfonyl fluoride and dissolve it in acetone, and dissolve 10g of N,N-dimethylethylenediamine in acetone at 5°C Under the conditions and stirring conditions, use the dropping funnel dropwise into the three-necked flask, after 1 hour, heat up to about 60 ° C for 4 hours, remove the solvent and purify to obtain a light yellow solid intermediate product C 8 f 17 SO 2 NH(CH 2 ) 2 N(CH 3 ) 2 ; put 2g fluoropentanediol HOCH 2 (CF 2 ) 3 CH 2 OH was dissolved in a small amount of dichloromethane, and in a three-neck flask equipped with a stirrer, reflux condenser and dropping funnel, the temperature was controlled at 0 °C under the protection of nitrogen, and BrCH was ...
Embodiment 2
[0033] Hydrocarbon pharmaceutical compound C 8 h 17 N + (CH 3 ) 2 CH 2 CH 2 OCH 2 CH 2 N + (CH 3 ) 2 C 8 h 17 ·2Br - The synthesis process of the method: Add 10ml of diethylene glycol into a 50mL three-necked flask equipped with a magnetic stirrer and a dropping funnel. Under the condition of cooling and stirring in an ice-water bath, 15 ml of phosphorus tribromide was added dropwise with a dropping funnel, and the viscosity of the system increased during the dropwise addition. React at room temperature for 3 to 4 hours, and the reaction system will produce white smoke. A small amount of water was added to decompose the unreacted phosphorus tribromide to obtain a viscous liquid. The reaction was carried out in a fume hood, then poured into a beaker and washed with an appropriate amount of water, separated with a separatory funnel, and the oily liquid in the lower layer was taken out and washed with anhydrous Na 2 SO 4 Dry and filter to obtain a light yellow oi...
Embodiment 3
[0034] Embodiment 3, the cationic compound (molecular weight about 3000) of anti-swelling effect is obtained by the reaction of dimethylamine and epichlorohydrin, and the specific synthesis process:
[0035] Add 20ml of 40% dimethylamine aqueous solution into a 50mL three-necked flask equipped with a magnetic stirrer and a dropping funnel, and add 6ml of epichlorohydrin dropwise with a dropping funnel under cold water bath and stirring conditions, and control the reaction temperature not to exceed 30 ℃, raised to 50-60 ℃ after completion of the dropwise reaction for 4-5 hours under reflux to obtain a light yellow solution, namely the target product.
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