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云坪、膏云坪、膏盐湖和台内滩特征 a—竹叶状白云岩,D50井,3469 m,马一段;b—含盐白云岩,盐溶孔,D126井,3321.65 m,马二段;c—膏质白云岩,D122井,3420.88 m,马三段;d—颗粒白云岩,颗粒边缘被溶蚀后被方解石胶结(黄色箭头),颗粒间亮晶白云石胶结,D126井,2926 m,马五6亚段,(-);e—鲕粒白云岩,亮晶白云石胶结,D123井,3589.28 m,马三段,(-);f—颗粒白云岩,颗粒为粉晶—细晶白云岩,粒间孔径达1.5 mm,D124井,3153.52 m,马五7亚段,(-)