Application of Conventional Logging Identifying Technique for Identifying Fractures in Low Porosity and Low Permeability Reservoirs——A Case Study of Xujiahe Formation in Northeastern Sichuan Basin
Abstract: The reservoir with low porosity and low permeability had poor physical property and it mostly depended on the fractures to improve its reservoir capacity and flowing ability. Now the coring characteristic description methods and the imaging logging identifying methods were commonly used in fracture identification for the reservoirs with low porosity and low permeability, which were limited by data collection of coring and imaging logging. By taking Xujiahe Formation (T3x) in Northeastern Sichuan Basin as an example, its main fractures were structural fractures and interface fractures with an inclination of skew angle-low angle, whose direction was mainly northeast. By observation of cores and correlation of conventional logs, it is found out that fractures in tight strata would cause abnormal response in gamma ray logging, sonic logging and resistivity logging, which can be used to build a conventional logging response model for fractures by using imaging calibration conventional logging methods. By identification, fractures in T3x are mainly developed near the faults, where the density of hanging wall is larger than that of footwall.
文章引用: 唐 敬 , 张尚锋 , 戴胜群 , 白 伟 (2017) 低孔低渗储层裂缝常规测井识别技术——以川东北地区须家河组为例。 石油天然气学报， 39， 30-37. doi: 10.12677/JOGT.2017.391005
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