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普光气田礁滩相气田的发现,展示了碳酸盐岩礁滩储层巨大的勘探潜力,然而发育在碳酸盐岩台地内部早期成因的礁滩相储层非均质性极强,该类储层的优劣严格受沉积微相和微古地貌起伏所控制。因此,研究礁滩相发育分布尤为必要。本文以四川盆地普光气田下三叠统飞仙关组、上二叠系长兴组为研究对象,通过对礁滩相颗粒岩测井相分析、单井礁滩体的沉积微相演化分析,阐明了该区块礁滩相储层沉积微相的纵向演化特征,为普光气田优质高效开发奠定了沉积学基础。
The discovery of the reef-shoal facies gas field in the Puguang gas field shows the huge exploration potential of carbonate reef reservoirs, however, the reef-shoal facies reservoirs developed early in the carbonate platform are highly heterogeneous. The pros and cons of the layer are strictly controlled by sedimentary microfacies and microtu geomorphology. Therefore, it is necessary to study the distribution of reef-shoal facies. In this paper, the Lower Triassic Feixianguan Formation and the Upper Permian Changxing Formation in the Puguang Gas Field, Sichuan Basin, are selected as the research objects. By analyzing the log facies of the reef-shoal facies granulites and the sedimentary microfacies evolution of the single-reef reef bank, The longitudinal evolution of sedimentary microfacies of the reef-shoal facies in the block has laid a foundation of sedimentology for the high-quality and efficient development of the Puguang Gas Field.