Pore throat structure and classification of Paleogene tight reservoirs in Jiyang depression, Bohai Bay Basin, China

WANG Yongshi,GAO Yang,FANG Zhengwei

Table 4 Pore throat structure parameters derived from CT scanning for Paleogene tight sandstone and sandy conglomerate in the Jiyang depression.

Sample number Permeability/ 10-3 μm2 Max. throat radius/μm Avg. throat radius/μm Max. throat length/μm Avg. throat length/μm Max. coordination number Avg. coordination number B667-2 0.014 4.0 1.20 33.9 5.80 28 2 Y22-22-1 0.099 8.4 2.06 42.8 13.32 30 2 Y22-22-2 0.112 22.8 4.35 67.7 14.11 27 5 S548-1 0.186 13.1 2.23 31.3 7.76 23 3 S548-2 0.018 11.8 1.50 23.9 5.10 9 1 S126-1 0.046 11.5 2.82 31.8 8.94 34 4 Y172-2 0.237 7.1 1.40 42.2 5.60 21 4