陆表海碳酸盐岩台地沉积期微地貌恢复方法研究——以四川盆地磨溪气田嘉二2亚段A层为例

陆表海碳酸盐岩台地沉积期微地貌起伏差异小，难于确定。分析了沉积期微地貌控制着颗粒滩储层的发育及分布，因此，可通过对颗粒滩储层的研究，反演微地貌起伏。按此原理，建议具体研究步骤为:颗粒岩沉积为主体的等时地质体选取、储层成因确定、暴露时间确定、沉积期地貌恢复，以及成果检验应用。以四川盆地磨溪气田嘉陵江组嘉二2亚段A层为例，利用丰富的钻孔取心资料进行了实例研究，取得良好效果，表明该方法值得推广应用，尤其适用于钻探程度高、资料老、缺乏三孔隙度测井系列的盆地老区，这对于储层预测和新层挖潜具有重要参考意义。

Research on the Method of Recoverying Microtopography of Epeiric Carbonate Platform in Depositional Stage:A case study from the layer A of Jia 2~2 Member in Moxi Gas Field,Sichuan Basin

The microtopography difference of the epeiric carbonate platform in the depositional stage is so tiny,as a result,it is too hard to identify.This paper is then,firstly,mainly based on the development dominating factors of the grain shoal within the platform,and then points out that the microtopography highland tends to be beyond the wave base in the relative-regression stage,where the grain shoal develops.The depositional rate is higher than any other microfacies area within the platform,hence,the topograph...