Technologcial progress and development directions of PetroChina overseas oil and gas exploration

MU Longxin*,JI Zhifeng

Table 3 Statistics on global unconventional natural gas prospective resources (revised from References [8, 25]).

Region Shale gas Amount of prospective resources, in 1012 m3 Tight gas Amount of prospective resources, in 1012 m3 Coalbed methane Amount of prospective resources, in 1012 m3 Total/1012 m3 Recoverable Geologic Recoverable Geologic Recoverable Geologic Recoverable Geologic North America 34 136 5 40 17 28 56 204 Asia 26 108 9 42 14 21 49 171 Russia 15 53 0 3 15 24 30 80 Middle East 21 94 0 2 0 0 21 96 Africa 19 73 0 0 0 0 19 73 South America 19 75 0 1 0 1 19 77 Europe 16 67 1 3 0 1 17 74 Oceania 11 44 2 4 3 6 16 51 Total 161 650 17 95 49 81 227 826