Research Article

The Exquisite Comparison of Shale Mineralogical-Geochemical Characteristics between Chang 7 Member and Chang 9 Member in Yanchang Formation, Ordos Basin

Table 6

Porosity and permeability of the Yanchang shale samples.

NumberDepth (m)Way of drillingMember/SMLength (cm)Diameter (cm)Porosity (%)Permeability (mD)

11409.31VerticalC7-2SM4.0392.4890.6460.002933
21414.15VerticalC7-2SM5.0652.4940.4000.000961
31415.67VerticalC7-2SM2.8212.4971.3850.000927
41417.73VerticalC7-2SM2.7352.4920.9640.000331
51418.95VerticalC7-2SM3.9332.4940.8570.000303
61420.88VerticalC7-2SM2.9582.4921.3310.000501
71419.66ParallelC7-2SM2.7572.4942.2290.001192
81141.92ParallelC7-2SM2.8702.4602.6900.001634
91386.12ParallelC7-3SM4.9202.4582.2620.000468
101388.72ParallelC7-3SM2.7552.4782.0620.001002
111392.62ParallelC7-3SM2.9462.4962.7790.000201
121392.77ParallelC7-3SM2.7832.4792.3750.000178
131399.25ParallelC7-3SM2.6862.4822.5850.007016
141399.78ParallelC7-3SM3.3022.4902.9760.000047
151398.37ParallelC7-3SM3.4702.4902.1180.002029
161608.28ParallelC7-3SM2.9722.4831.3410.004561
171613.38ParallelC7-3SM3.8922.4942.0300.002188
181619.22ParallelC7-3SM3.8082.4921.6310.000664
191621.85ParallelC7-3SM4.2492.4992.1350.000197
201611.12VerticalC7-3SM4.7792.4910.7860.000068
211611.86VerticalC7-3SM2.8392.4890.6150.000535
221620.68ParallelC7-3SM2.7782.4951.9620.000428
231360.75ParallelC9M3.0002.4703.7900.001289
241600.19ParallelC9M2.8802.4802.5500.002533
251671.34ParallelC9M2.7702.4703.3300.001781

Vertical: drilling orientation perpendicular to sedimentary stratification. Parallel: drilling orientation parallel to sedimentary stratification.