GS Oilfield E31Area Water Flooded Layer Evaluation Method And Its Application Research

Most of China’s oil fields are continental deposit, a major oil producer, China isthe world’s terrestrial oilfield,95%of the crude oil output from continental reservoir.Due to the nature of China’s oil field reservoir heterogeneity is serious, insufficientnatural energy, mainly USES the pattern mining, China is the world’s one of the highestproportion of water flood oilfield, water injection development oilfield reservesaccounted for over85%of the total reserves. According to these situation, loggingmethod to enhance oil recovery, surplus reserves, mining oilfield water injection hasnot spread to the extraction of cheng du low residual oil, and estimate the remainingreserves, provide the basis for the adjustment of the oil field development plan plays aunique role. Compared with other methods, real-time response the formationparameters and its changes to the size of the method, and lower cost of well logging,the logging methods evaluate the water flooded layer and production test has becomethe stage of oilfield development indispensable important means.GS oilfield E31reservoir development mainly experienced three stages: sporadicpre-production phase, the experimental zone was the development phase and the waterinjection development in an all-round way. Through long-term water flooding, GSoilfield XY reservoir has entered high water cut development stage at present, so in themeet GS oilfield, reservoir structure, fluid characteristics, on the basis of making fulluse of geological, logging, core analysis, test data, the study concluded that differentflooding period reservoir formation water, lithology, physical properties (porosity andpermeability), electrical (SP, AC, microelectrode, Rt), oil content, oil saturation and thechange characteristics of water flooding, polymer flooding development regularity ofwater flooded reservoir. Under the condition of different lithology and differentsalinities and changes of rock electrical experiment research, find out the water floodedlayer resistivity and saturation index change regularity and the influence factors of; Tosample oil-water relative permeability experiments at the same time, the establishmentof the oil-water relative permeability and water saturation, irreducible water saturation,the relationship between residual oil saturation. The water flooded layer logging curvecharacteristics and discriminant method of qualitative research, and on the basis of four sex study to establish, shale content, porosity and permeability interpretation model;Studied the irreducible water saturation, residual oil saturation and residual oilsaturation interpretation method and water production rate, the calculation method ofoil displacement efficiency. According to the logging interpretation results and someproduction logging data, such as to determine the planar distribution of remaining oil.