鄂尔多斯盆地大牛地气田奥陶系马家沟组中下组合沉积模式*
雷涛1, 邓虎成2,3, 吴冬2,3, 伏美燕2,3, 唐明远1, 崔璐1, 丁晓琪2,3, 夏宇2,3, 解馨慧2,3

Depositional model of the lower-middle Ordovician Majiagou Formation in Daniudi Gas Field,Ordos Basin
Lei Tao1, Deng Hu-Cheng2,3, Wu Dong2,3, Fu Mei-Yan2,3, Tang Ming-Yuan1, Cui Lu1, Ding Xiao-Qi2,3, Xia Yu2,3, Xie Xin-Hui2,3
大牛地气田马家沟组中下组合主要岩石类型及特征 a—泥晶—微晶白云岩,藻纹层,D123井,3291.18 m,(-);b—细晶—粉晶白云岩,自形程度较高,D37井,3455.13 m,(-);c—泥晶—微晶灰岩,D37井,2924.92 m,(-);d—鲕粒白云岩,鲕粒具明显同心层结构,沿同心层呈现环带状溶蚀,D126井,2926.0 m,(-);e—颗粒白云岩,砾屑结构,PG27井,2977.71 m,(-);f—颗粒灰岩,砂屑结构,D37井,3048.38 m,(-);g—膏岩,D37井,3456.42 m,(+);h—含膏灰岩,石膏假晶针状或柱状,D122井,3204.02 m,(+);i—泥质白云岩,波状纹层,D37井,3375.64 m,(-)