Summary of micro pore characteristics and connectivity characterization of shale reservoir

Author of the article:SUN Dongmeng, SUN Linghu, XIAO Hanmin, FENG Chun, LI Bowen, WANG Lei, CHEN Cancan

Author's Workplace：1. School of Engineering Science, University of Chinese Academy of Sciences, Beijing, 100190, China; 2. Institute of Seepage Fluid Mechanics, Chinese Academy of Sciences, Langfang, Hebei, 065007, China; 3. Langfang Branch, Research Institute of Petroleum Exploration and Development, PetroChina, Langfang, Hebei, 065007, China; 4. Research Institute of Exploration and Development, PetroChina Huabei Oilfield Company, Cangzhou, Hebei, 062552, China

Key Words：Wood’s metal high pressure injection; Connectivity

Abstract：The exploration and development of shale reservoir is closely related to the microscopic pore characteristics of shale reservoir and the qualitative and quantitative characterization of shale oil availability. In recent years, with the development of advanced technology, there has been great progress in unconventional reservoir geological prospecting. Through the investigation of fine characterization technology of micro/nano pore-throat structure, qualitative and quantitative characterization technology is introduced, which is divided into data analysis technology and image observation technology. Among them, in addition to the mainstream characterization techniques, two methods that have certain advantages in the study of micro/nano-pore throat structures but are not fully popularized are detailed, such as low field nuclear magnetic resonance(NMR)and Wood’s metal high press injection technology(such as HP-WMI). Its advantage mainly embodies on the quantitative characterization of the pore throat, especially on the characterization of connectivity. The qualitative and quantitative characterization methods of Wood’s metal high pressure injection technology combined with image observation technology and subsequent image data processing are summarized, which is of great significance to the study of microscopic pore characteristics of shale reservoir.