Abstract: In view of the complex relationship between electrical and oiliness in deep reservoirs of Eastern South China Sea, especially the low-contrast reservoirs, which have the similar conventional response characteristics between the water and oil layer and make it difficult to distinguish fluid properties. However, the common discriminant methods and most kinds of interpretation cross plots are difficult to achieve the purpose of accurately identifying the fluid properties. To solve this kind of problem, this paper combines the logging and geological data to discover the sensitive information that affects the logging response of the reservoir. On the basis of this research, two kinds of fluid property identification charts which are more suitable for this area are established. Finally, good application results are obtained through practice, and more convenient and accurate fluid property evaluation techniques for rapid processing and interpretation on site are provided.