黄龙场地区飞仙关组沉积相及其储层控制作用

Sedimentary facies of Feixianguan Formation and its control on reservoir in Huanglongchang region of Northeast Sichuan

川东北黄龙场地区下三叠统飞仙关组位于碳酸盐岩台地边缘向深海盆地的过渡区域,主体为一台地—陆棚—斜坡—台盆体系。通过对黄龙场地区飞仙关组沉积相特征、相带展布及储层分布情况的对比分析后发现,无论是在纵向发育规模还是平面展布特征上,飞仙关组储层的发育规律与鲕粒滩的发育规律都基本相近,优质储层多发育于颗粒滩相中,且滩体的不同部位其储层性质存在差异。研究结果表明,黄龙场地区飞仙关组沉积相带的变化对储层发育具有明显的控制作用。

Lower Triassic Feixianguan Formation of Huanglongchang is located in the transitional region between the carbonate platform and the deep sea basin. By comparing the distribution of sedimentary facies with the distribution of reservoir, the research has indicated that the developmental law of reservoir and oolitic beach were similar whether from vertical scales or from characters of areal distribution, and the reservoir development has been dominated by the migration of sedimentary facies.