This book studies the marine multiple formations of petroleum geology in Central Sichuan Basin. It provides thorough, systematic, and empirical guideline on the topic. It makes full use of geological, drilling, logging, and seismic data, according to the principle of point-line-surface combination, to reconstruct the fine lithofacies paleogeography of Sinian-Triassic, reveals genesis and distribution characteristics of reservoir, evaluates the key exploration fields and favorable zones, and provides detailed basic geological data for oil and gas exploration. This book is used as reference for both professionals and students engaged in geology research.