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本文认为白马庙气田上侏罗统蓬莱镇组的主要沉积相类型为湖成三角洲和湖泊沉积。通常有2～3条主分流河道自北西方向进入研究区,三角洲属河控型鸟足状三角洲;滨、浅湖相构成了湖泊相的主要亚相类型。三角洲前缘为该区的优势亚相,砂体展布明显受控于水下分流河道、河口坝和远砂坝等微相,指状砂坝、复合式砂坝是该区蓬莱镇组Ⅲ、Ⅳ段(主力产气层段)的有利储集体。今后,基于沉积微相研究的砂体展布精细研究始终是该气田地质研究的重要课题之一。
This paper argues that the main sedimentary facies of the Upper Jurassic Penglaizhen Formation in the Baimamiao gas field are lacustrine deltaic and lacustrine sediments. There are usually 2 ~ 3 main distributary channels entering the study area from the NW direction, and the delta is a river-control bird-foot delta. The shore and shallow lacustrine facies constitute the major subfacies of the lake facies. The delta front is the dominant subfacies of this area, and the distribution of sand bodies is obviously controlled by microfacies such as underwater distributary channel, estuary dam and far sand bar, , Ⅳ section (main gas production section) of the favorable reservoir. In the future, fine study of sandbody distribution based on the study of sedimentary microfacies has always been one of the important topics in geological research of this field.