Research Article
Study on Damage Mechanism of Waterflooding Development in Weizhou 11-4N Low-Permeability Oilfield
Table 1
clay mineral composition table of L1 section in Weizhou 11-4 N oilfield.
| | Number | Core number | Well depth (m) | Quartz (%) | Total amount of clay minerals (%) | Other minerals (%) | Illite (%) | Kaolinite (%) | Mixed layer of illite and montmorillonite (%) | Chlorite (%) |
| | 1 | 2-1 | 2603.09 | 70.50 | 14.40 | 15.10 | 70.00 | 11.00 | 15.00 | 4.00 | | 2 | 2-4 | 2934.59 | 71.50 | 17.80 | 10.70 | 61.00 | 25.00 | 11.00 | 3.00 | | 3 | 2-8 | 2217.00 | 85.20 | 8.20 | 6.60 | 44.00 | 32.00 | 18.00 | 6.00 | | 4 | 2-10 | 2514.80 | 85.80 | 7.10 | 7.10 | 43.00 | 44.00 | 7.00 | 6.00 | | 5 | 2-21 | 2778.00 | 87.50 | 9.10 | 3.40 | 48.00 | 39.00 | 9.00 | 4.00 | | 6 | 2-13 | 3132.60 | 81.00 | 14.00 | 5.00 | 77.00 | 7.00 | 12.00 | 4.00 | | 7 | 2-29 | 3139.50 | 83.00 | 15.30 | 1.70 | 68.00 | 11.00 | 14.00 | 7.00 | | 8 | 2-35 | 2777.70 | 86.90 | 4.60 | 8.50 | 70.00 | 10.00 | 16.00 | 4.00 | | Statistics | Maximum value | 87.50 | 17.80 | 15.10 | 77.00 | 44.00 | 18.00 | 7.00 | | Maximum value | 70.50 | 4.60 | 1.70 | 43.00 | 7.00 | 7.00 | 3.00 | | Mean value | 81.43 | 11.31 | 7.26 | 60.13 | 22.38 | 12.75 | 4.75 |
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