Methane-rich fluids were recognized to be hosted in the reservoir volcanic rocks as primary inclusions. Samples were collected from core-drillings of volcanic g
The Neoproterozoic Doushantuo Formation at Weng’an in Guizhou Province of South China consists of phosphorites and dolomites. Three types of samples are recong
The absolute amounts and relative distributions of neutral nitrogen compounds in the Tabei oilfield (e.g. blocks Ln1-Ln11) showed remarkable migration fractiona