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Pore-throat structure characteristics and its impact on the porosity and permeability relationship of Carboniferous carbonate reservoirs in eastern edge of Pre-Caspian Basin
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LI Weiqiang,MU Longxin,ZHAO Lun,LI Jianxin,WANG Shuqin,FAN Zifei,SHAO Dali,LI Changhai,SHAN Fachao,ZHAO Wenqi,SUN Meng
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Table 4 Quantitative evaluation by grey correlation method on the main controlling factors of permeability of different types of reservoirs in the Carboniferous KT-I layer of the North Truva Oilfield.
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| Reservoir type | Influencing parameter types, grey correlation degree and ranking | | Reservoir storage capacity | Grey correlation degree and ranking | Pore-
throat
size | Grey
correlation degree and ranking | The development degree
of different pore-throats | Grey correla-
tion degree
and ranking | Pore-
throat sorting | Grey correlation degree and ranking | Pore
connec-
tivity | Grey correlation degree and ranking | Pore-cavity-
fracture reservoir | ? | 0.587 5(5) | R35 | 0.595 0(4) | Vma | 0.695 9(1) | C | 0.657 1(2) | Vpt | 0.612 7(3) | | Pore-cavity reservoir | ? | 0.561 6(3) | R5 | 0.777 3(1) | Vma | 0.683 6(2) | C | 0.522 6(5) | We | 0.539 7(4) | | Pore-fracture reservoir | ? | 0.701 4(1) | Rav | 0.620 0(5) | Vma | 0.637 6(4) | α | 0.656 7(3) | Smin | 0.685 4(2) | | Pore reservoir | ? | 0.573 5(3) | Dav | 0.720 1(1) | Vma+me | 0.622 6(2) | C | 0.509 4(5) | We | 0.552 4(4) |
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