The Logging Response Characteristics And Mechanisms Of Chemical Flooding In Ultra-high Water Cut Stage

Oilfield entered ultra-high water cut stage of development, to further enhance therecovery rate and gradually implement the polymer flooding, asp flooding.Because thevariety of the displacement fluid by different physicochemical properties, to enter the waterflooded layer after, reservoir physical properties produce different degree of change, and thelogging response characteristics produce corresponding change, to log interpretation andthickness division presents new challenges. Therefore,to find out the different mechanism ofrock physical properties change in the displacement mode, to grasp the logging responsecharacteristics of change is of great significance to the oil field development, This researchproject carried out a small number of targeted rock physics experiments, while drawing onprevious experimental results and research experience, summed up the proposed chemicalflooding flooding mechanism and logging response understanding of the law, including thewater polymer flooding flooding mechanism and logging response characteristics, and sewagepolymer flooding flooding mechanism and logging response characteristics, of the ASPflooding, the flooding mechanism and its logging response characteristics, combined withclosed core data, the establishment of chemical flooding flooding layer log interpretationmethods, respectively, given to adapt to water flooding, polymer flooding and ASP floodingreservoir flood degree identifying method, by not, low, medium and high four flood levelexplanation, in line with the rate of88%or more, for polymer flooding of asp floodingdevelopment,provides a more favorable water flooded degree division method; establisheda high precision reservoir parameter calculation method. Porosity, water saturation meanabsolute error were1.47%,6.4%, and absolute permeability calculation thick layer averagerelative error42.3%, thin layer of86.2%. For chemical flooding development providesreservoir geological parameters interpretation method; Clears in the extra high water cutperiod chemical flooding to the effects of the thickness interpretation,thicknessinterpretation standard basic from chemical flooding effect,, the conclusions are stillapplicable.