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川东地区的长兴组生物礁、飞仙关组鲕滩及石炭系地层—构造复合圈闭气藏由于储集体储集条件优良,具有储量丰度高、产能高、勘探效益好的特点,在油气勘探中占有重要的地位,越来越受到勘探决策部门和研究人员的重视。近年来,针对非背斜油气藏的勘探作了大量探索性的研究,取得了丰富的成果,其中最为突出的是五百梯石炭系地层—构造复合圈闭气藏和渡口河飞仙关组鲕滩气藏。从气田个数上讲,盆地内探明储量达300×10~8m~3以上的气田共有四个,非背斜圈闭占两个(五百梯和沙坪场);从储量大小比较,非背斜圈闭占石炭系、土二叠统长兴组、下三叠统飞仙关组三层总储量的25.5％;就川东而言,非背斜圈闭占46.65％,可见是相当可观的。
Changxing Formation reef in Feixianguan Formation, oolitic beach in Feixianguan Formation and stratigraphic-structural complex trap in Feixianguan Formation in East Sichuan have the characteristics of high reserves abundance, high productivity and good prospecting benefits due to their excellent reservoir storage conditions, Exploration occupies an important position, more and more by the exploration and decision-making departments and researchers attention. In recent years, a great deal of exploratory research has been done on the exploration of non-anticlinal reservoirs and a great deal of achievements have been made. Among them, the most prominent are the Carboniferous stratigraphic-structural complex trapped gas reservoirs of the Baiti Tertiary and the oolite Beach gas reservoir. In terms of the number of gas fields, there are four gas fields with proven reserves of 300 × 10 ~ 8m ~ 3 in the basin and two non-anticlinal traps (five hundred ladders and Shaping field). Compared with the reserves, The anticline trap accounts for 25.5% of the total reserves of the Carboniferous, Permian Changxing Formation and the Lower Triassic Feixianguan Formation. For the eastern Sichuan, the non-anticline trap accounts for 46.65% of the total reserves, which is quite impressive of.