Analysis of shale fluid experiment data

There is still no clear standard in determining oil volume of continental basin shale in domestic and abroad due to the lack of coring data and systematic research. Therefore the deeply understanding of fluid distribution law in shale is also lacked. Based on the laboratory conditions today, the water content, oil content and porosity of shale are measured by the atmospheric dry distillation method and the helium method. The experimental results show that the pore fluid distribution law in shale is different from conventional sandstone. 1) The sum of water saturation and oil saturation is greater than 100% in shale; 2) With the increasing of porosity, oil volume is also increasing while water volume is constant. A reasonable explanation for the phenomenon is given by analyzing the experiment methods and conditions. This understanding might be significant for the in-depth research and understanding of unconventional shale reservoir.