普光气田长兴组不仅发育生物礁相储层，而且随着普光6井生屑滩相、砂砾屑滩相储层和302-1井鲕粒滩相储层的发现，表明滩相也是长兴组重要的沉积相类型。普光气田长兴组晚期演化为台地边缘，以发育台地边缘礁、滩相为特征，结合开发井礁滩相的测井模式聚类识别，生物礁相发育在普光5、普光6、普光8、普光9、毛坝3等井区，滩相分布在普光2、普光4、普光6、普光7、102-1、302-3、302-1等井区，其相带狭窄，近似呈北西—南东向条带状分布。长兴组储层主要为一套礁白云岩、亮晶鲕粒云岩和残余颗粒云岩，以高中孔、中高渗，孔隙型储层为主，储集空间类型以晶间孔、晶间溶孔、粒间溶孔、粒内溶孔、铸模孔以及溶蚀扩大孔为主，裂缝和压溶缝合线次之，具有较好的物性特征。长兴组生物礁和边缘滩相储层是普光气田继飞仙关组鲕粒滩后又一个具有巨大勘探潜力的储层类型。

The discovery of bioclastic and grit beach facies reservoirs in the PG6 well, and oolitic beach facies reservoir in 302-1 well, shows that the Puguang gas field Changxing Formation develops both reef and beach reservoirs. In the late period of Changxing Formation, the facies of Puguang gas field evolved into platform edge, developed reef and shallow facies. With the recognization of reef and shallow facies in development wells by type clustering, the reef is scattered around wells PG5, PG6, PG8, PG9, MB3, etc, the shallow facies is scattered around wells PG2, PG4, PG6, PG7, 102-1, 302-3, 302-1, they extend narrowly, and have a northwest\|eastsouth direction. The Changxing Formation reservoirs are mainly a set of reef dolomite, sparry oolitic dolomite, and have moderate to high porosity, moderate to high permeability and good physical properties. The reservoir space types are mainly intercrystalline pore, intercrystalline solution pore, intergranular dissolved pore, intragranular dissolved pore, moldic pore and dissolved expanding pore, and to a lesser extent, crack and suture. The Changxing Formation reef and shallow facies reservoir is a new type of reservoir having a great potentiality after Feixiaguan Formation oolitic beach was found.