Abstract: This study discusses the different oil-bearing characteristic and control factors of continental tight oil to support reservoir evaluation and increase knowledge on such reservoirs. Contrast analyses were conducted, such as macro distribution of tight oil, rock core observation, reservoir conditions, and single well productivity. The results reveal that different oilbearing phenomena exist both in marine and continental tight oil. In continental tight oil, the oil-bearing characteristics are decentralized distribution, a wide range, and large differences. Techniques such as core observation, slice identification, logging interpretation, and development area anatomy analysis clarified the oil-bearing characteristic of the Lucaogou tight oil in the Jimusaer Depression, Junggar Basin, showing obvious differences at different scales. Increasingly, attention is being paid to the optimization of well location, well trajectory, and fracturing design. In addition, the controlling factors of tight oil differentiation and oil bearing distribution were discussed. The factors that determine the macroscopic distribution of oil-bearing are the sedimentary facies, diagenetic facies, fault system, and the source storage configuration. Factors such as the reservoir beds, physical properties, pore structures, micro fractures, and others control the local distribution of the tight oil differentiation oil-bearing.

Key words: tight oil, differentiation, oil-bearing, Jimusaer Depression, Lucaogou Formation