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A reservoir drying method for enhancing recovery of tight gas
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ZHANG Liehui,XIONG Yu,ZHAO Yulong,TANG Hongming,GUO Jingjing,JIA Chunsheng,LEI Qiang,WANG Binghe
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Table 2 Drying effects of residual water on gas permeability
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Model with residual
water | Pore structure | Improved gas permeability/% | Average pore
radius/μm | Average throat
radius/μm | Pore/throat ratio | Average coordination number | | Dry core | 17.975 3 | 9.485 9 | 1.894 9 | 3.287 5 | | | Branched residual water | 22.047 6 | 12.464 2 | 1.768 9 | 2.491 7 | 5.24 | | Isolated residual water | 22.155 6 | 12.502 1 | 1.772 2 | 2.459 1 | 4.70 | | Residual water film | 17.868 0 | 9.346 8 | 1.911 7 | 3.298 4 | 97.87 |
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