Alkyl ester sulphonate complex viscosity depressant with hydrogen supply structure and preparation method thereof
A technology of alkyl ester sulfonate and complex, which is applied in the direction of drilling composition, chemical instruments and methods, etc., and can solve the problem of difficulty in accurately estimating the optimal injection rate, the influence of reservoir heterogeneity, hydrogen supply, etc. To solve problems such as large amount of agent, achieve good viscosity reduction effect and universal applicability, good practical value, and improve quality
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Embodiment 1
[0020] A method for preparing an alkyl ester sulfonate complex viscosity reducer with a hydrogen-donating structure, which comprises the following steps: adding 1.0 mol of lauryl alcohol (C12) and 5.0 mol of formic acid into a three-necked flask, and performing an esterification reaction at 70° C. 1.0h, then dissolved with 2.0mol dichloroethane, placed in an ice-water bath, stirred, and 1.3mol chlorosulfonic acid was added dropwise at a uniform speed for sulfonation reaction for 0.5h, after the sulfonation was completed, the temperature was raised to 70°C and aged for 1.0h to obtain an intermediate product ; Then add 0.12mol of iron powder into the above reaction system (intermediate product), carry out the complexation reaction at 100°C for 1.0h, after the reaction is over, let stand, separate layers, remove the water in the upper layer, dry at 60°C, the lower layer is waxy The product is an alkyl ester sulfonate complex viscosity reducer (product) with a hydrogen-donating str...
Embodiment 2
[0025] A preparation method of an alkyl ester sulfonate complex viscosity reducer with a hydrogen-donating structure, which comprises the following steps: adding 1.0 mol of myristyl alcohol (C14) and 6.0 mol of formic acid into a three-necked flask, and performing esterification at 80° C. React for 1.5 hours, then dissolve with 2.2mol dichloroethane, place in an ice-water bath, stir, add 1.5mol chlorosulfonic acid dropwise at a uniform speed for sulfonation reaction for 0.7h, heat up to 80°C for aging for 1.3h after sulfonation is completed; then Add 0.12mol iron powder into the above reaction system, carry out complexation reaction at 110°C for 1.3h, after the reaction, let stand and separate layers, remove the water in the upper layer, and dry at 60°C, the lower waxy substance is a hydrogen-donating structure. Alkyl ester sulfonate complex viscosity reducer (product). Industrial production can be scaled up with industrial-grade raw materials.
[0026] The resulting alkyl es...
Embodiment 3
[0030] A preparation method of an alkyl ester sulfonate complex viscosity reducer with a hydrogen-donating structure, which comprises the following steps: adding 1.0 mol of palmitic alcohol (C16) and 7.0 mol of formic acid into a three-necked flask, and performing an esterification reaction at 80° C. 2.0h, then dissolved with 2.4mol dichloroethane, placed in an ice-water bath, stirred, and 1.7mol chlorosulfonic acid was added dropwise at a uniform speed for sulfonation reaction for 0.8h, after the sulfonation was completed, the temperature was raised to 80°C for aging for 1.6h; mol iron powder was added to the above reaction system, and the complexation reaction was carried out at 120°C for 1.6h. Ester sulfonate complex viscosity reducer (product). Industrial production can be scaled up with industrial-grade raw materials.
[0031] The resulting alkyl ester sulfonate complex viscosity reducer with a hydrogen-donating structure has a chemical name of an alkyl ester sulfonate i...
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