Advanced Micro-rheological Analysis of Surface Active Materials and Its New Application to Enhanced Oil Recovery Methods

Direct measurements of structural-mechanical and hydrodynamic liquid parameters in tight gaps – flat capillaries in reservoir conditions have been carried out. An extensive set of special investigations on the reagent effect on the rheological properties of oil and its flow specifics in the porous medium have been conducted. The extreme character of concentration dependencies of hydrodynamic properties of capillary oil proves the possibility of oil effect mechanism change by variation of reagent concentration in the displacing fluid. The study defined more precisely physical-chemical peculiarities of membranous oil condition – the impact of intensification methods and estimate its effectiveness degree. Methodology of studies included analysis of structure forming kinetics and the specifics of oil from three oil fields before and after reagent contacts in tight gaps, which correspond for average pore dimensions of low-, medium- and high-permeable reservoirs under development. Study has been carried out with the reagents of different character – poly-glycol of various petrochemical manufactures. Proposed reagents meet major criteria for flow deflection technologies, helping on the first stage washing of oil in washed part of the reservoir and decreasing its permeability, subsequently. Extensive research allowed developing technologies and it successful realization on oil fields in the Volga-Ural region.