On the one hand, it is is very complex and difficult to identify fluid type of fracture reservoir because of its complexlithology, various reservoir types and heterogeneity.
The quantitative log interpretation is very difficult because of the complexlithology of carbonate reservoir and the incomplete logging suite in old oil and gas region.
碳酸盐岩储层岩性复杂，老油气区测井系列不全，测井定量解释的难度很大。
3
As the level of reservoir development improves continuously, some reservoir which has complex structure, lithology, reservoir, fluid characteristics has gradually become a main development objective.