The Glutenite Reservoir Logging Geological Evaluation Of Upper Karamay Formation In Wu2Dong Block,Karamay Oil Filed

The upper Karamay Formation in Wu2 Dong block of Karamay oil field is glutenite reservoir,which characterized by mixed lithology,complicated physical property.The reservoir heterogeneity is so serious that makes the logging interpretation much more difficulty.Besides,the study of first logging geological evaluation was very old and plain,which unable to adapt to the current research and production of this area.So it's meaningful to do the more accurate second logging geological evaluation.Based on the study of first logging geological evaluation,this article first studied the new and old key wells,in order to have a deeper understanding of the logging geology features and the relationship of four kinds of property of reservoir.After that,the paper determine the glutenite reservoir lithology identification standard of Rt and Cnl.Then by using mathematical statistics methods to construct models and optimize accuracy model,and compared with the first logging interpretation we got the final model suitable for the current research and production in this area.Finally,the most suitable model was used in the multi-well of the whole study area.Based on the results of log interpretation,in view of the main layer S5,we carried out the multi-well reservoir logging evaluation.The results show that the reservoir is near provenance,as the fan delta sedimentary environment formed,lithology complex;Belong to the medium pore and low permeability reservoir,the reservoir physical properties are greatly influenced by lithology.And the porosity and permeability parameters models gained by quadratic polynomial of Crossplot Method and multivariate stepwise regression of different lithologies,the original oil saturation model got by Archie formula,the current water saturation model gotten by layered sealed coring wells are better.In main S5 layer,the western area near the fault location,and the north and middle strip of reservoir is favorable reservoir,which the has a guiding significance for the production and development of oil reservoir.