FMI成像测井在碳酸盐岩裂缝和断层研究中的应用

FMI成像测井在碳酸盐岩裂缝和断层的研究中具有重要的作用,通过总结塔里木盆地2口典型探井奥陶系鹰山组碳酸盐岩储层的成像测井特征后,认为成像测井可识别天然裂缝和诱导缝,其中天然裂缝又包括构造成因的高角度裂缝、中低角度裂缝、共轭裂缝、网状裂缝和非构造成因的缝合线;也可识别出天然裂缝中的方解石、泥质和有机质等裂缝充填物;同时也可拾取裂缝的走向、倾向和倾角等表征裂缝的参数。成像测井可通过地层重复特征、并结合岩心和地震构造解释成果识别探井钻遇断层的上、下盘的产状和断裂破碎带的特征,较为精细地刻画断层。

Application of FMI imaging logging in carbonate rock fracture and fault research

FMI imaging logging plays an important role in carbonate rock fracture and fault research,through summarizing imaging logging characteristics of Yingshan formation in Ordovician carbonate reservoir of Tarim basin,FMI imaging logging is believed to identify natural fractures and induced fractures.The natural fractures include high dip-angle,mid-low dip-angle,conjugated,and map cracking fractures caused by structural reasons and non-structural suture line.Besides,it can also identify fracture fissure fillings from natural fractures,such as calcite,clay,organic matter and etc.Meantime,it can obtain fracture parameters,orientation,tendency and dip angles.By stratigraphic characteristics repetition,combined with core and seismic tectonic interpretation results to identify the upper and lower wall occurrence and the characteristics of the fault fracture zone,and describe faults in detail.FMI imaging logging is of great significance for comprehensive evaluation of fractured reservoir and fault research in the field of carbonate exploration.