SUSPENSIONS OF POLYMERS ARE EFFICIENT MATERIALS FOR CREATION OF FLOW DEVIATING BARRIERS IN THE INTERWELL ZONES OF OIL ACCUMULATION
Keywords:
increase of oil recovery from fractured-porous reservoirs, dispersible polymeric materials.Abstract
Creation of interwell flow deviating barriers in a fractured-porous formation by means of pumping suspension of dispersible materials according
to different technologies and plugging high-permeable cracks are efficient methods of control of filtration flows and increase o oil recovery at which
displacement agent (water, solution of active admixture) does not move (does not circulate) in vain in cracks by-passing oil saturated porous blocks
(usually the coefficient of fracture hollowness equals 0,2-0,8% comparing the porosity factor which equals up to 20-30%) and hydrodinamically displaces (instead of counter current capillary suction) oil out of them.
Efficiency of the method depends on the choice of dispersible material which must correspond certain requirements (guided dispersible systems). In addition to some bituminous materials such dispersible polymeric materials as polyvinyl alcohol, polystyrene of different kinds, polyethylene, polypropylene, polyvinylchloride and fluoroplastic of different kinds correspond these requirements on the basis of the published data (in technical requirements for them) and according to the results of laboratory researches. These materials are produced by industry in sufficient volumes. The temperature formation conditions of their application have been ascertained.
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