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Binary pore structure characteristics of tight sandstone reservoirs
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ZHU Haihua,ZHANG Tingshan,ZHONG Dakang,LI Yaoyu,ZHANG Jingxuan,CHEN Xiaohui
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Table 1 Petrologic features of tight sandstone samples.
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| No. | Well | Depth/
m | Quartz/% | Feldspar/% | Rock fragment/% | Mica/
% | Other debris/
% | Matrix/% | Authigenic mineral/% | Thin section porosity/% | Igne-
ous
rock | Quart-
zite | Phyl-
lite | Other
metamor-
phic rock | Sedi-
mentary rock | Chlo-
rite | Ferro calcite | Anke-
rite | Silica | Other | Inter-
granular pore | Particle dissolution pore | Total | | 1 | B279 | 1 915.2 | 40.5 | 9.2 | 2.0 | 1.8 | 7.8 | 4.5 | 3.7 | 17.2 | 0.8 | 7.8 | 0 | 0.5 | 4.0 | 0.2 | 0 | 0.1 | 0.4 | 0.5 | | 2 | Z62 | 1 853.8 | 26.0 | 46.0 | 3.0 | 1.0 | 1.5 | 0 | 3.5 | 3.0 | 4.5 | 5.0 | 0 | 2.0 | 0 | 0.5 | 4.00 | 0 | 0.3 | 0.3 | | 3 | B502 | 1 956.7 | 31.5 | 38.0 | 0.7 | 0 | 5.0 | 2.0 | 4.7 | 9.0 | 1.0 | 4.8 | 0 | 2.5 | 0.5 | 0.3 | 0.80 | 0 | 0.3 | 0.3 | | 4 | N28 | 1 702.4 | 36.0 | 27.0 | 2.5 | 2.0 | 3.0 | 2.0 | 7.0 | 5.0 | 1.0 | 8.0 | 2 | 3.0 | 0.5 | 1.0 | 0 | 0 | 0.7 | 0.7 | | 5 | N46 | 1 641.6 | 35.5 | 7.5 | 0.7 | 0 | 5.0 | 2.0 | 4.7 | 9.5 | 0 | 31.8 | 0 | 2.5 | 0.5 | 0.3 | 0.80 | 0 | 0.3 | 0.3 | | 6 | L72 | 1 915.1 | 50.5 | 17.0 | 4.0 | 1.5 | 3.5 | 1.5 | 8.0 | 3.0 | 0 | 9.0 | 0 | 0 | 1.0 | 1.0 | 0 | 0 | 1.1 | 1.1 | | 7 | Z211 | 1 580.1 | 43.0 | 27.5 | 3.5 | 2.0 | 1.5 | 1.5 | 4.5 | 2.5 | 0 | 8.5 | 1 | 0.5 | 2.0 | 1.5 | 0.50 | 0.2 | 0.6 | 0.8 | | 8 | N34 | 1 600.4 | 47.0 | 20.0 | 4.5 | 1.0 | 3.0 | 2.0 | 2.5 | 4.0 | 0 | 15.0 | 0 | 1.0 | 0 | 0 | 0 | 0 | 0.4 | 0.4 | | 9 | T2 | 1 669.9 | 24.5 | 43.5 | 3.0 | 1.0 | 2.0 | 1.0 | 4.5 | 6.5 | 1.0 | 7.0 | 0 | 3.0 | 1.0 | 2.0 | 0 | 0.1 | 0.2 | 0.3 | | 10 | B269 | 1 969.3 | 22.5 | 41.0 | 4.0 | 1.5 | 4.0 | 1.0 | 4.0 | 5.0 | 0 | 12.0 | 0 | 4.0 | 0 | 1.0 | 0 | 0.2 | 0.5 | 0.7 | | 11 | L19 | 1 765.4 | 50.0 | 12.0 | 5.0 | 3.0 | 2.5 | 1.5 | 13.0 | 2.0 | 2.0 | 3.0 | 1 | 0 | 1.0 | 1.0 | 3.00 | 1.5 | 0.5 | 2.0 | | 12 | G56 | 1 953.0 | 23.0 | 48.0 | 4.0 | 2.0 | 3.0 | 2.0 | 1.1 | 6.0 | 1.2 | 4.0 | 0 | 4.5 | 0 | 1.2 | 0 | 1.0 | 1.3 | 2.3 | | 13 | N18 | 1 672.0 | 45.0 | 28.0 | 3.0 | 2.0 | 1.0 | 0 | 6.0 | 4.0 | 5.0 | 2.0 | 0 | 2.0 | 0 | 2.0 | 0 | 1.0 | 0.6 | 1.6 | | 14 | X233 | 1 973.8 | 54.0 | 18.5 | 3.0 | 4.0 | 1.5 | 1.5 | 4.5 | 4.5 | 0 | 3.5 | 0 | 0 | 2.0 | 2.0 | 1.00 | 0.4 | 3.3 | 3.7 |
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