The distribution of source rocks are controlled by the sedimentary facies of the Majiagou Formation and the basement tectonics of the basin.
烃源岩的分布受碳酸盐岩沉积相和盆地基底构造所控制。
The reservoir type is Ordovician weathering crust in the Lower Paleozoic, and the main gas layer is in the fifth member of Majiagou Formation.
储集层类型为下古生界奥陶系古风化壳型，其主力含气层为马家沟组第五段。
The gas of central gas field of Shan-Gan-Ning basin is produced from paleo-weathered crust dolostone reserviors of Majiagou formation on top Ordovician.
陕甘宁盆地中部气田的天然气产于奥陶系顶部古风化亮马家沟组白云岩储层中，储集空间的形成是不同期次溶蚀作用和充填作用相互作用的结果。
The weathering crust of Majiagou Formation in Ordovician of Changqing Gasfield in Ordos Basin is the major pay zone with the evaporated marginal sea facies.
鄂尔多斯盆地中部气田奥陶系马家沟组属蒸发边缘海相地层，其风化壳是中部气田的主要产气层段。
The carbonate rocks in the Lower Ordovician Majiagou Formation of Ordos Basin are widely distributed, but their organic matter content is low and maturation high.
鄂尔多斯盆地下奥陶统马家沟组碳酸盐岩分布广，但有机质丰度较低，且成熟度高。
During the Early Ordovician, a suit of carbonate-evaporites had deposited in the east part of the Ordos, which is now known as the Majiagou Formation and up to approximately 1000 meters in thickness.
早奥陶世马家沟期，在鄂尔多斯东部的陕北地区沉积了近千米厚的碳酸盐岩-蒸发岩地层。
During the Early Ordovician, a suit of carbonate-evaporites had deposited in the east part of the Ordos, which is now known as the Majiagou Formation and up to approximately 1000 meters in thickness.
早奥陶世马家沟期，在鄂尔多斯东部的陕北地区沉积了近千米厚的碳酸盐岩-蒸发岩地层。
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