By Li GuoXin, Wang YuHua, Zhao Jie, Yang FengPing, and Yin ChangHai, PetroChina and Thomas J. Neville, Sherif Farag, Yang XingWang, and Zhu YouQing, Schlumberger
Violent volcanic eruption in the Pacific ring of fire has created some of the most complex geology on earth. The best efforts of petrophysicists and engineers are required to evaluate the hydrocarbon reservoirs in the region.