By D. O. Shah (auth.), Dinesh O. Shah (eds.)
It is with nice excitement and delight that I current to the overseas clinical group this number of papers awarded on the symposium on floor Phenomena in greater Oil restoration held at Stockholm, Sweden, in the course of August 20-25, 1979. it's been a thrilling and hard adventure to edit the papers incorporated during this quantity. The court cases conceal six significant components of study on the topic of chemical flooding tactics for more desirable oil restoration, particularly, 1) primary facets of the oil displacement procedure, 2) Micro constitution of surfactant platforms, three) Emulsion rheology and oil dis placement mechanisms, four) Wettability and oil displacement mecha nisms, five) Adsorption, clays and chemical loss mechanisms, and six) Polymer rheology and surfactant-polymer interactions. This booklet additionally contains invited evaluation papers, particularly, "Research on better Oil restoration: earlier, current and Future," and "Formation and houses of Micelles and Microemulsions" through Professor J. J. Taber and Professor H. F. Eicke respectively. This symposium quantity displays the present state-of-art and our realizing of assorted floor phenomena in more suitable oil restoration strategies. The participation via researchers from numerous nations during this symposium displays the worldwide curiosity during this quarter of study and the overseas attempt to increase che technology and expertise of more suitable oil restoration processes.
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Extra resources for Surface Phenomena in Enhanced Oil Recovery
Example text
Alcohol-Water-Oil Miscible Processes Alcohol flooding is discussed here in some detail because it provides a basis for understanding the relationship between phase behavior, interfacial tension, and oil recovery. It is recognized that no successful field trial of the alcohol process has ever been carried out. The use of alcohol as a miscible driving fluid for the displacement of oil has a number of advantages over other materials. Certain low molecular weight alcohols are miscible in all proportions with both the driving water and with some reservoir oils.
8 to 2,190 millidarcies. Prior to the critical displacement test, all rock samples were waterflooded at slow (subcritical) rates until each sample contained its normal residual oil value. , until the critical value of ~P/L0 was attained. The results which are given in Figure 4 indicate a definite trend towards higher ~P/L0 critical values at lower permeabilities. Since the experiments were done on different rocks from several formations (55), a precise correlation between permeability and the critical displacement ratio should not be expected.
Chan and Shah (103) also studied relationships between microemulsions and optimal salinity by observing the effects of additives and temperature changes which can bring about the phase transition from lower to middle to upper phase in these systems. In general, their work indicates that the surfactant partition coefficient between the oil phase and the excess brine phase is unity at the optimal parameter value. Their work indicates that there is a strong similarity between the interfacial tension behavior of low concentration systems and those of high concentration systems.
