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Heterogeneity and influencing factors of marine gravity flow tight sandstone under abnormally high pressure: A case study from the Miocene Huangliu Formation reservoirs in LD10 area, Yinggehai Basin, South China Sea
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FAN Caiwei,CAO Jiangjun,LUO Jinglan,LI Shanshan,WU Shijiu,DAI Long,HOU Jingxian,MAO Qianru
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Table 3 High-pressure mercury injection curves of Huangliu Formation reservoir in LD10 block of Yinggehai Basin at abnormally high pressure.
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| Curve type | Porosity/
% | Permeability/10-3 μm2 | Displacement
pressure/MPa | Median pressure/
MPa | Median radius/mm | Maximum mercury
injection saturation/% | Mercury
withdrawal
efficiency/% | Sorting
coefficient | Variation coefficient | Number of samples | Type
I | 9.25-16.26
(11.83) | 0.30-25.26
(4.50) | 0.01-0.47
(0.14) | 0.52-4.34
(2.52) | 0.17-1.42
(0.45) | 74.71-99.51
(85.79) | 15.05-46.73
(31.19) | 1.96-5.25
(3.26) | 0.18-0.29
(0.28) | 19 | Type
II | 5.57-12.81
(8.98) | 0.15-5.51
(0.77) | 0.01-0.70
(0.25) | 1.74-51.82
(8.54) | 0.01-1.42
(0.29) | 64.65-88.59
(76.80) | 21.46-40.92
(29.90) | 2.52-4.85
(3.75) | 0.25-0.50
(0.38) | 23 | Type
III | 4.11-9.06
(6.67) | 0.05-1.15
(0.22) | 0.02-0.90
(0.56) | 1.17-67.78
(15.88) | 0.01-0.63
(0.24) | 52.17-87.99
(65.99) | 19.10-37.81
(29.12) | 1.88-5.49
(3.91) | 0.27-0.79
(0.51) | 11 |
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