The Subei Basin is characterized by a complex structure and well-developed faults. The shale in the second member of the Funing Formation has relatively low organic matter abundance

with a total organic carbon (TOC) generally below 1.5%. This shale exhibits diverse lithofacies types

complex pore structures

strong reservoir heterogeneity

and significant lateral variations in pressure coefficients. Using the shale oil reservoir in Block H of the second member of the Funing Formation in the Subei Basin as an example

this paper analyzed the characteristics of regional logging responses based on the results of rock physics experiments. By integrating conventional and specialized logging methods

a logging interpretation model was developed to evaluate the lithology

reservoir properties

oil content

mobility

and fracability of the shale oil reservoir. The model’s calculations aligned well with core analysis results. Building on this

sensitive parameters were optimized to establish evaluation and classification standards for the shale oil reservoirs in the block

and a comprehensive “sweet spot” evaluation of the reservoir was conducted. Exploration practices involving multiple wells have verified that this logging evaluation technology is regionally adaptable. It effectively classifies shale oil reservoir types

supports the optimal selection of “sweet spots”

and provides reliable technical support for the exploration and development of shale oil in the Subei Basin.