The Research And Experiment Of Thick Oil And Water Control Technology In Ultra-high Water Cut Stage

With the research idea of "cycle contrast, grade control, differential treatment of different phase belt" the contrast principle, We conduct delicate geologic correlation To the guidance of modern sediments and outcrop prototype model, carried out a detailed level analysis to formation of interest in the study area. Put forward the " analytical hierarchy " research ideas. On North Second Sisa groupâ…¡5 thick oil in 10 sedimentary units within the building structure analysis carried out, the meandering river sand body is divided into four levels, Microfacies level (composite channel, overbank and flood plains), the single channel level (combined mode), single point bar point bar side of the level and integrated level (side lamination tendency, inclination, horizontal distance and extended length) Meandering the formation of channel sands within the building structure methods. By "single sand body revealed heterogeneity" for the purpose of time units and integrated planar micro-analysis phase, get the list from the perspective of the causes of the causes of sand, spatial distribution, connectivity, heterogeneity, etc., structures of thick oil and residual oil on the basis of detailed descriptions for different types of residual oil in the targeted potential matching technology. Comparison of the plane remaining oil enrichment, the larger potential of the region can play a well and efficient way to further potential with the manner of high efficiency well; For the sandwich-type residual oil from the well through the methodof reducing well spacing ,sub-injection layer, thick oil layer at the top of the expansion into the horizontal well to the potential of water swept volume; the remaining oil at the top of positive rhythm through the layer of fill, blocking, tone, drive or cycle, combined with the way injection potential ;for the thin type residual oil, we use the methed of periodic injection means remaining oil.