Characteristics of Well-Logging Response to Lava Flow Units of the Lower Cretaceous Basalts in Songliao Basin

详细信息   

• 责任者：Huang Yulong (College of Earth Sciences ; Jilin University ; Changchun 130061 ; China) ; Sun Deyou
• 刊名：Chinese Journal of Geophysics
• 出版年：2011
• 卷期：54(2)
• 关键词：结晶岩类储集层 ; crystalline reservoirs ; 储层流动单元 ; reservoir flow unit ; 地球物理测井 ; geophysical logging ; 松辽平原 ; Songliao Plain
• 页码：p.524-533
• 图表：9 illus., 2 tables, 34 refs.
• 分类号：1600
• issnNo：ISSN0001-5733
• isbnNo：CN11-2074/P

摘要

Flow units are the most elementary constituents of basaltic lava strata, and the zonation of pores and fractures determines the capability and distribution of basaltic reservoirs. Both outcrop and borehole information are used to build the geologic model of basaltic lava flow units, indicating that each unit is composed of three parts such as the upper vesicular zone, the central massive zone and the lower vesicular zone from top to bottom. Three electro-facies including alteration zone, vesicular zone and massive zone were identified by combining the natural gamma log (GR), acoustic log (DT), density log (RHOB), electrical resistivity (LLD) and neutron log (NPHI). Natural gamma-ray spectral logging (K, Th and U) were also utilized to distinguish intervals with abnormal high gamma values.