Table 2: Logging interpretation of the Chunfeng oilfield cores.

Well Name Strata Depth (m) Calcareous Interlayer Thickness (m) Calcareous Interlayer Recognition Thickness (m) Accuracy (%)
Z624 195-206.4 3.7 3.3 89.2
Z634 176.3-189.7 3.1 2.9 93.5
Z609-M 196.9-209 3.5 3.0 85.7
Z612-N 304.3-319.8 5.3 5.1 96.2
Z607 273.8-284.6 2.7 2.5 92.6