Development characteristics and petroleum geological significance of Permian pyroclastic flow volcanic rocks in Western Sichuan Basin, SW China

PENG Hao,YIN Cheng,HE Qinglin,XIA Guoyong,LIU Yong,MA Tinghu,CHEN Kang,LIU Ran,SU Wang

Table 1 Logging response parameters of Permian volcanic rocks in Chengdu-Jianyang Block, Western Sichuan Basin

Lithology GR/ API AC/ (μs•m-1) Density/ (g•cm-3) Resistivity/ (?•m) Pyroclastic rock 44-49 3500-4500 2.5-2.8 7-35 Pyroclastic lava 45-75 3500-4500 2.3-2.7 6-26 Basalt 52-58 5000-5500 2.8-2.9 300-2000 Diabase porphyrite 62-78 5000-5500 2.8-3.0 300-8000