Research On Oil Emulsification System Performance BS Class Betaine Drive

After years of efforts, the core technology of independent innovation and technology combine mature industry, after nearly 50 batches of amplification test, the successful completion of a new betaine surfactant pilot scale production, to produce 15 tons of qualified products, product quality and stability test, excellent interfacial properties of binary systems, has good oil displacement effect, almost no difference between kilograms product.Daqing Oilfield reservoir for a Class undeveloped reserves of only 148 million tons, mainly in the northern and southern parts of the transition zone, EOR object has turned II, III oil reservoir from a class. Three types of geological oil reserves of 1.86 billion tons, the current level of water Flooding relatively low, abundant remaining oil resources. Three reservoirs will be one of the main potential oil reserves and future period of. Three types of water drive reservoir level is below a second class oil, yet significantly enhanced recovery method is applied to the formation of the mine.Through laboratory experiments to study the factors BS class betaine surfactants interfacial tension, examining the system concentration, alkali concentration, salinity of betaine surfactant solution interfacial tension. Through different shear time, shear rate, and the ratio of oil and water of different experiments to determine the conditions of emulsification betaine binary system; through the analysis of water, stability index particle size analysis of microscopic electron microscope graph, optimized emulsifying performance evaluation methods. Through the different additives and betaine, the main agent complex experiment screened out good emulsifying properties of the binary system to improve the betaine emulsion formulation aids, and by optimizing the emulsifying properties of the comprehensive evaluation method of emulsified formula evaluation screened out five good recipe binary system. Finally, the effect of flooding enhanced oil recovery investigated the ability of Five Binary flooding systems.The results show that: the larger the effect of different concentrations of betaine main agent of the interfacial tension, little effect on the alkali added betaine main agent, but the larger interfacial tension betaine binary composite system impact. Effective concentration 25% of the main agent with good interfacial tension, compatibility, salt resistance. However, due to higher prices of the main agent, so the design of the main agent is preferably betaine experiment with different types of emulsifying additives to achieve ultra-low interfacial tension of purpose to improve emulsification. By weak base oil sulfonate study the effects of different conditions on the emulsion stability of the emulsion, the emulsion and find better conditions, namely a shear rate of 2000 rpm, shearing time of 5min, oil-water ratio of 1: 1.Use different types of binary systems of evaluation methods emulsifying properties of a series of experiments found that conventional analysis of water and a stable index is not available for comparison of different emulsion stability evaluation system, in particular the high concentration of water and a stable system analysis index evaluation results are quite different, emulsion stability evaluation method needs to be optimized, evaluate the stability of betaine system. In considering the factors on the basis of the interfacial tension, consider the analysis of water rate, stability index, a microscope like four indicators, emulsifying effect comprehensive evaluation betaine binary system, better evaluation. With this kind of evaluation emulsified preferred method screened out five good emulsifying properties of binary systems betaine compound samples for flooding best binary system emulsifying formulation.