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近年在四川盆地东北部三叠系飞仙关组发现的鲕滩气藏储量已超过1000×108 m3。它们的埋深大都小于4500 m。为了加快深层鲕滩气藏勘探，文章通过野外露头、井下岩心、测井、钻井资料以及室内地球化学资料的综合分析，研究了沉积相、烃源运聚、构造史对深埋鲕滩气藏的影响。川东北飞仙关组碳酸盐蒸发台地西缘有巨厚的台缘障壁坝鲕粒岩发育，它是巨厚优质鲕滩储层发育有利区。大巴山褶皱带的抬升、挤压使该区供烃通过北东向断层由开江—梁平海槽往东向台地运移，使台地西缘圈闭处于捕烃最有利位置。鲕滩气藏无统一气水分布，故台地西部台缘鲕粒滩相的深层圈闭有望发现储层巨厚的特大鲕滩气藏。边缘相带深埋的分水岭、青草坪鲕滩气藏圈闭是目前两个最值得钻探的目标。

EXPLORATION TARGET OF THE DEEP OOLITIC BEACH GAS RESERVOIR OF THE TRIASSIC SYSTEM FEIXIANGUAN FORMATION IN NORTHEAST PART OF SICHUAN BASIN 2)

Massive platform edge barrier oolite is very developed on the west fringe of carbonate rock evaporate plateau of Feixianguan Formation in the northeast part of Sichuan Basin and it is a favorable developed area of massive oolitic beach reservoir. Owing to the uplift and squeeze of Dabashan folded zone, it made the west fringe trap of the plateau become the most favorable location of capturing hydrocarbon that the hydrocarbon sources migrated along northeast fault from Kaijiang—Liangping oceanic trough to east plateau. Investigation shows that an exceptionally big oolitic beach reservoir with massive thickness could be found out in the deep trap of oolitic beach facies on the west platform edge of the plateau.