Method of displacing oil by anionic-cationic composite surfactant
A compound surfactant and surfactant technology, applied in chemical instruments and methods, production fluids, earthwork drilling and production, etc., can solve problems such as corrosion equipment and pipeline demulsification difficulties, formation and oil well damage, poor oil displacement efficiency, etc. , to achieve enhanced oil recovery, high interfacial activity, and improved water-oil mobility ratio
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Embodiment 1
[0025]Dissolve phenyltrimethylammonium chloride and sodium sulfosalicylate in water respectively, and then mix the above two solutions evenly according to the molar ratio of phenyltrimethylammonium chloride and sodium sulfosalicylate 1:0.1 , to obtain anion and cation complex surfactants. Dissolve ultra-high molecular weight polyacrylamide in water to prepare an aqueous solution. Then mix the aforementioned 0.2wt% negative and positive composite surfactant, 0.15wt% ultra-high molecular weight polyacrylamide and 99.65wt% injection water from the offshore block of Shengli Oilfield and stir for 2 hours to obtain a uniform and transparent high-efficiency oil displacement agent .
[0026] The TX-500C spinning drop interfacial tensiometer was used to measure the oil-water interface of anion and cationic composite surfactants (one-component system) and their composites with polymers (poly-surface binary system) and the offshore block IFA-8 of Shengli Oilfield. tension. The measure...
Embodiment 2
[0034] Dissolve decyltriethylammonium hydroxide and sodium α-olefin sulfonate (carbon chain length is C15-18) in water respectively, and then : 0.4 The above two solutions are mixed uniformly to obtain anion-cation complex surfactant. Dissolve ultra-high molecular weight polyacrylamide in water to prepare an aqueous solution. Then mix the aforementioned 0.05wt% negative and positive composite surfactant, 1.00wt% ultra-high molecular weight polyacrylamide and 98.95wt% injection water from the offshore block of Shengli Oilfield and stir for 2 hours to obtain a uniform and transparent high-efficiency oil displacement agent .
[0035] The TX-500C spinning drop interfacial tensiometer was used to measure the oil-water interface of anion and cationic composite surfactants (one-component system) and their composites with polymers (poly-surface binary system) and the offshore block IFA-8 of Shengli Oilfield. tension. The measured temperature is 60 o C, the salinity is 29858mg / L, C...
Embodiment 3
[0043] Dissolve tetraethylammonium chloride and lignosulfonate in water respectively, and then mix the above two solutions evenly according to the molar ratio of tetraethylammonium chloride and lignosulfonate of 1:1.4 to obtain anion-cation composite Surfactant. Dissolve ultra-high molecular weight polyacrylamide in water to prepare an aqueous solution. Then the aforementioned 0.2wt% negative and positive composite surfactant, 0.15wt% ultra-high molecular weight polyacrylamide and 99.65wt% Henan Shuanghe Oilfield Layers 5-11 are mixed with water and stirred for 2 hours to obtain a uniform and transparent high-efficiency oil displacement agent.
[0044] The TX-500C spinning drop interfacial tensiometer was used to measure the anionic and cationic composite surfactants (one-component system) and their composites with polymers (poly-surface binary system) and Henan Shuanghe Oilfield. Interfacial tension of oil and water in layers 5-11. The measured temperature is 81 o C, fo...
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