Distribution and further exploration of the large-medium sized gas fields in Sichuan Basin

Abstract

Sichuan Basin is the place in which natural gas was firstly explored and comprehensively utilized in China.27 large-medium sized gas fields have been discovered and the gas production capacity more than 100×108m3 has been constructed on the basis of over 50 years of industrial exploration and production.The large-medium sized gas fields are mainly distributed in eastern and western Sichuan Basin,and the main reservoir is Permian and Triassic.The porous types of reservoir is porosity and porosity-fractured.Innovative understanding,creative ideas and developed technology are three key factors controlling the development of the exploration within the basin.This research summarizes the distribution characteristics of the large-medium sized gas fields,and some advises are proposed for further exploration in this basin.It is pointed out that the deep and super-deep reservoirs such as Permian and Triassic in west and east,middle-shallow reservoirs of Triassic continental deposit in east and middle,piedmont zone,Jialingjiang Formation oolitic shoals and regional unconformities are important regions to explore in Sichuan Basin.