Formation of overpressure system and its relationship with the distribution of large gas fields in typical foreland basins in central and western China

LI Wei,CHEN Zhuxin,HUANG Pinghui,YU Zhichao,MIN Lei,LU Xuesong

Fig. 3. Profile of overpressure systems and gas accumulations in the Weiyuan-Gaoshiti Giant Moxi-Longnüsi area in the foreland uplift of the West Sichuan foreland basin (the location of the profile is shown inFig. 1). Z2d—Upper Sinian Doushantuo Formation; —C1c—Lower Cambrian Canglangpu Formation; —C1q—Lower Cambrian Qiongzhusi Formation;—C2-3x—Middle-Upper Cambrian Xixiangchi Formation.