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川中－川南过渡带上三叠统香溪嫩中，已发现两个气田和一些含气小区。这里背斜和断层稀少，圈闭情况不精。通过对该群储层特征，沉积相、成岩作用，香溪各沉积前古构造地貌、香溪群下下伏层断层变形差异及气藏特征等的研究认为有四类有利于天然气聚集的储渗体圈闭，并绘制了较理想的模型。

RESERVOIR-PERMEATION SYSTEM TRAP MODELS FOR GAS ACCUMULATION OF THE UPPER TRIASSIC IN THE INTERMEDIATE ZONE BETWEEN THE CENTRE AND SOUTH OF SICHUAN BASIN

??Two gas fields and some small gas -bearing areas are discovered in Upper Triassic intermediate zone between the centre and south of Sichuan Basin.But there is few anticlines and faults in the zone and the conditions of the traps are not clear.By rerearching the reservoir characteristics,sedimentary facies,diagenesis,palaeostructure,palaeogeomorphology and deformation discrepaces of the underlying faults in the area,it is determined that there are four types of reservoir-permeation system traps favourable for gas accumulation in the Upper Triassic and the relevant idealer models are set up.They are:??the reservoir-permeation system traps related to the palaeogeomorphology,??the ones with sedimentary facies changes,??the ones with diagenetic facies changes,??the ones converted from faults.Moreover,they are classified into nine types of secondary reservoir-permeation system traps with good exploration potential.