Tectono-paleogeography has an important guidance both in earth science basic studies and in energy and deposit exploration. Scholars and explorationists in and outboard have explored for a long period and got fair results. The paper takes the Permian and Triassic reef and shoal gas exploration in northeast Sichuan Basin as an example, and discusses the sedimentary map playing a great role in the series of gas field discoveries, and the mobilistic thought has a thorough significance in making the sedimentary maps. It shows that more than 40 years of study on Late Permian to Early Triassic sedimentary facies has resulted in the breakthrough of gas exploration of the Changxin Formation reefs and the Feixianguan Formation oolitic shoals, and the continuous discoveries of the giant Puguang, the Longgang, and the Yuanba gas fields. The innovation and development of the sedimentary facies maps has given to miracles of big discoveries of a number of gas fields. Combining the basin with the adjacent orogenic belts, the paper focuses on the proto-type basins of Late Permian to Early Triassic. It is shown that the great change for understanding the tectono-plaeogeographic setting during this period around the Sichuan Basin. The platform margin is favorable for the development of reefs and shoals, while the platform sag is the prolific area for the source rocks. To relocate and restore the sedimentary basin is helpful for predication of deposit and resources. The new-round study of moblistic tectono-paleogeography is based upon the much more data of geological surveys, and the exploration data of petroleum and coals. The mobilistic paleo-geography under the big data is to get the progresses in the earth sciences as well as the serial discoveries of resources exploration.