Challenges and countermeasures of log evaluation in unconventional petroleum exploration and
development
LIU Guoqiang
Fig. 3. Relationship between oil saturation and permeability of shale oil reservoir. Chang 73 submember—Chang 73 submember of Triassic Yanchang Formation in Ordos Basin; Lucaogou Fm.—Permian Lucaogou Formation in Jimusaer sag, Junggar basin; Bakken Fm.—Devonian Bakken Formation in Williston Basin, U.S.; Da II submember—The second sub-member of Da'anzhai member of Jurassic Ziliujing Formation in Central Sichuan Basin; Qing I Member—The first member of Cretaceous Qingshankou Formation in Songliao basin; Tiaohu Fm. —Permian Tiaohu Formation in Santanghu Basin.