Liu, B.L.; Yang, L.; Liu, Y.R.; Lei, Z.D.; Chen, X.B.; Wang, K.; Li, J.; Guo, X.F., and Yu, Q., 2020. Main factors for the development of ultra-low permeability reservoirs. In: Guido Aldana, P.A. and Kantamaneni, K. (eds.), Advances in Water Resources, Coastal Management, and Marine Science Technology. Journal of Coastal Research, Special Issue No. 104, pp. 435–439. Coconut Creek (Florida), ISSN 0749-0208.

Clarifying the main factors for ultra-low permeability reservoirs is the prerequisite to proposing reasonable development methods based on their characteristics. In the research, consider the characteristics of ultra-low permeability reservoirs have been taken into consideration comprehensively and reservoir characteristic parameters have been optimized based on reservoir physical properties and percolation mechanism; factor analysis has been adopted to extract the main factors underlying the reservoirs; on the basis of clear reservoir characteristic main factors, the research determines the type of ultra-low permeability in combination with the K-means clustering method, and the main controlling factors of various types of reservoirs. The research was based on 100 ultra-low permeability reservoir blocks and found that the characteristics of ultra-low permeability reservoirs can be expressed by 4 main factors, namely, saturation factor, expansion factor, formation factor and flow factor. Different types of ultra-low permeability reservoirs are characterized by different main controlling factors. Based on the results of this research, this method can effectively determine the main controlling factors for various types of ultra-low permeability reservoirs, and clarify the characteristics of various types of ultra-low permeability reservoirs so as to provide a scientific basis for guiding the production and development of ultra-low permeability reservoirs.