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An exploration breakthrough in Paleozoic petroleum system of Huanghua Depression in Dagang Oilfield and its significance, North China
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ZHAO Xianzheng,PU Xiugang,JIANG Wenya,ZHOU Lihong,JIN Fengming,XIAO Dunqing,FU Lixin,LI Hongjun
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Table 3 Maceral in Upper Paleozoic coal seams in the central and southern Huanghua Depression.
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| Region | Forma-
tion | Vitrinite/% | (Exinite+
sapropel)/% | Inertinite/% | | Center | P1s | 29.9-90.0
67.0(9) | 5.0-32.2
13.8(8) | 6.8-65.1
19.2(9) | | C3t | 42.5-93.8
65.3(19) | 4.6-22.4
12.3(13) | 5.0-53.0
22.4(19) | | South | P1s | 19.6-81.0
56.7(13) | 2.8-54.0
18.8(10) | 9.0-80.5
24.5(13) | | C3t | 38.1-94.3
64.1(22) | 4.2-27.1
13.2(16) | 5.8-37.8
22.7(22) |
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