Challenges and countermeasures of log evaluation in unconventional petroleum exploration and development

LIU Guoqiang

Table 1 Fluid distribution of different types of unconventional oil and gas reservoirs.

Oil and gas reservoir Movable oil Bound oil Bound water Movable water Free gas Adsorbed gas Bitumen Kerogen Tight oil √ √ √ √[a] √[b] √[b] Shale oil √ √ √ √[a] √[b] √ √ Tight gas √ √[a] Shale gas √[c] √[c] √ √ √ √ √