Preparation Of Polymer Foam Agent

With the exploitation of natural gas entering its late period, the appearance of gas condensate in large amount in the liquid at the bottom of gas wells and the harsh earth bed condition with large content of methanol and salinity brings new opportunities and challenges for the development and production of Foam Discharging Agent used in the technology of drainage and gas exploitation. This thesis aims to study a new polymer foam agent which can be applied in this kind of gas wells. So it is sure to bring important practical values and social benefits.On the basis of studying bountiful related literatures, the thesis first chooses different monomers to synthesize eight different kinds of polymeric surfactant and selects the best formula by using high-speed stirring method; then it optimizes the synthesize conditions of this kind of polymers by employing the methods of high-speed stirring, Ress-Miles and SY/T5761-1995Foaming Agent Used in Drainage and Gas Exploitation CT5-2and characterizes the infrared spectra of these polymers; it finally studies the laws that influence the anti-salt, anti-oil and anti-methanol ability of this kind of new polymer foam agent and specifies the scope of its application.This research proves that the modified product of a-olefin sulfonate, acrylamide copolymer by formaldehyde, diethylamine has high salt resistance, oil resistance and methanol tolerance; under the following conditions:the polymerization temperature of a-olefin sulfonate, acrylamide copolymer is50℃, the weight ratio is1:2, The amount of initiator is0.1%of the total mass of monomer, polymerization time is6hours, the molar ratio of aery1amide, formaldehyde, secondary amine is1:0.5:0.75, under the reaction conditions when the secondary amine selects diethylamine, polymer foam is the best. Compared with α-olefin sulfonate, anti-salt foaming, foam-stablizing rate and fluid carrying have obviously increased; anti-oil, methanol tolerance fluid carrying has also obviously increased. Characterization of infrared spectra shows that the polymer modified by formaldehyde and secondary amine is the target product.After studying the laws influencing the anti-salt, anti-oil and anti-methanol ability of this foam agent, this thesis concludes that this foam agent could be applied to the technology of drainage and gas exploitation in the earth bed condition containing methanol, high percentage of oil condensate, and with low salinity.