Research On The Identiifcation Method Of Oil-water Layer Of Complex Reservoir In Surennuoer Oilifeld

Surennuoer oil field was affected by tectogenesis, sedimentation, fracturing, diagenicmetamorphism, it was formed sandstone reservoir with high block content, differences in porestructure and characteristics of lithology and physical, the log response change greatly,reservoir aeolotropism was inspissated. Consider relationship of complex oil-water layer,thesis developed an identification method of oil-water layer of reservoir.Through the application of major loggings, boring with samplings, well testing, well logsand other informations, while develop "four-character" relationship, the study results showedthat the log response of the Nantun and Tongbomiao oil-bearing were basically reflected withthe alternation characteristic of physical property and oil possibility. Through the analysis offluid identification, main contributing factor of Nantun reservoir is the changes and depositionof facies, sand piching and lateral facies variation. So lithology, physical properties areimportant factors to control the distribution of oil-water layer. Due to lithology contributionoccupy larger proportion to logging response, and the difference of oil-water layer logresponse is not clear, identification of fluid is complication.Associate with deposition microfacies and regular pattern in log response, it establishedinterpretation model of reservoir parameters about clay content, porosity, permeability and oilsaturation by statistical analysis method. By experimental data on the petro-physical analysis, determine the electrical parameters of reservoir rocks, the application of Archie's equation andmercury penetration record calculate reservoir original oil saturation.By utilize lithologicsection of coring wells, adopt stepwise discriminate analysis, thesis was processing and expounding five kinds of core data-rich lithology classes. Lithology identifies accuracydegree up to80%on Nantun first section and Nantun second section. Base on summarizationof typical oil-water log response feature, it established the identification plate of oil-waterlayer, combined with vector machine-LIBSVM method and lithologic section of coring wells, integrated explain the oil-water layer, formed a fluid identification method in Nantun reservoirof Shurennouer oilfield. The verification of the8well datas, obtain a desired results. Thetechnology in this thesis is some references can be used in coarse sandstone and siltstonereservoirs, it has a certain reference function.