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。
It showed the character of high yield, middle maturation period, strong resistance and good quality in multi-plot demonstration for several years.
在多年多点的试验示范中表现出了丰产性好，熟期适中，抗逆性强，品质优等特点。
The thermal evolution degree is high and has entered over-maturation phase.
烃源岩热演化程度高，已进入了过成熟阶段。
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