Study On The Chang6Reservior Characteristic And Evaluation Of Eastern Huaqing Oilfield

The east reservoir of huaqing oilfield is affect by the depositional environment, diagenesis, stucture and many other factors. Reservoirs have large differences with each other in reservoir performance and reservoir stucture. Reservoirs have characteristics of non-homogeneous, non-linear and log response complicacy. According to log, core and testing data, after analyzed reservoir and petro-physical facies characteristics, it got that the petro-physical facies in this area can be divided into three kinds, favorable permeability reservoir, more dense low permeability reservoir, and ultra-low permeability reservoir. It got a method of how to identity petro-physical facies. And using grey theory which is logging and geology evaluation method, build some indexes of how to divide the prteo-physical facies. Then divided the chang6reserviors into the three facies. Built parameter models of chang6, and got the the lower limit of effective thickness. It improved the linear relation of parameter model, increased the fitting precision of permeability, given an accurate classification of effective thickness. The compliance rate of logging interpretation and testing results is80%. It overcame some evaluation feature of low SNR and low resolution, and provided an effective method to established ultra-low permeability reservoir parameter models and fixed the effective thickness of oil reservoir.