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2015年7月7日,由中国石化华北分公司勘探开发研究院部署设计的大牛地气田PG26井在下古生界奥陶系风化壳马家沟组马五_(1-2)段喜获无阻流量50.2 662×10~4 m~3/d的高产气流,创该层段水平井最高产量记录,进一步证实大牛地气田下古生界风化壳储层具有一定的开发潜力。大牛地气田奥陶系风化壳天然气资源量达650×10~8 m~3,与靖边气田同属鄂尔多斯盆地中部风化壳岩溶斜坡带,是风化壳岩溶储层发育的有利区和重要的储产量接替阵地。但与靖边气田相比,大牛地气田奥陶系风化壳气藏整体具有储层品质低、渗透性差、
On July 7, 2015, PG26 Well of Daniudi Gas Field designed by Exploration and Development Research Institute, North China Branch, SINOPEC, won the award in the section of Mawugou, Lower Ordovician weathering crust, Majiagou Formation, Lower Paleozoic Unobstructed flow of 50.2 662 × 10 ~ 4 m ~ 3 / d of high-yielding gas, record the highest level of the horizontal well production record, further confirmed Daniandi gas field Paleozoic weathering crust reservoir has a certain potential for development. The natural gas resources of Ordovician weathering crust in the Daniudi gas field are 650 × 10 ~ 8 m ~ 3, which are all similar to the Jingbian gas field weathering crust karst slope belt in the central Ordos Basin. It is a favorable area for karst reservoir development and an important reservoir Yield replacement positions. However, compared with the Jingbian gas field, the Ordovician weathering crust gas reservoir in the Daniudi gas field has low reservoir quality, poor permeability,