Previous Articles     Next Articles

New Logging Evaluation Method for Shale Reservoirs: Taking Qingshankou Formation in Gulong Sag of Songliao Basin for Instance

Li Xia1, Zhou Cancan1, Zhao Jie2, Cheng Xiangzhi1, Hu Song1   

  1. PetroChina Research Institute of Petroleum Exploration & Development; 2 Exploratory Department of Daqing Oilfield Company Ltd.
  • Online:2014-06-15 Published:2014-06-15

Abstract: The shale reservoir is an important unconventional oil and gas reserve, while well logging evaluation techniques plays a significant role in oil and gas exploration and development. As for the non-structural fracture shale reservoir, the current existing conventional well logging evaluation technology both at home and abroad cannot meet the demand of exploration and development for such a reservoir. This article takes shale reservoir of the Qingshankou Formation in Gulong Sag of Songliao Basin for instance, aiming to meet the need for exploration and engineering transformation. Guided by the unconventional ideas, the logging quantitative evaluation method is studied on the basis of the quality of source rock, mineral components, formation pressure, rock brittleness and fractural identification. Then, three characterization parameters – organic carbon content of shale, formation pressure factor and rock brittleness – are selected and optimized to establish the effective logging identification and quantitative evaluation method for shale reservoirs, finally creating the systematic logging evaluation technology for shale reservoirs. This technology fills a domestic blank in logging evaluation of unconventional shale reservoirs and provides an important technological support for China’s exploration and development of shale reservoirs.