鄂尔多斯盆地奥陶系古地貌、古沟槽模式的修正及其地质意义

Modification and Geology Implication of Ordovician Paleogeomorphology and Paleogeosyncline Distribution Models in Ordos Basin

鄂尔多斯盆地奥陶系古沟槽的早期模式是在早期古地貌基础上建立的,它指导了早期对盆地中部的奥陶系油气勘探;但随着油气勘探程度的提高,原模式因南北向主沟槽的展布特征不明而严重制约了气田的东扩勘探。修正后的古沟槽现今模式更符合岩溶古地貌的发育规律,它进一步明确了盆地古地貌中台地和沟槽的展布特征,解决了原先的地势东倾与主沟槽展布方向不协调的矛盾。新的古沟槽模式的应用,论证了地质综合研究与天然气勘探的关系,它可使气田东侧的天然气勘探开发沿预测的区块继续向东延伸。指出一个正确的地质模式,只有结合生产实践,不断修正完善,才能在勘探实践中发挥其指导作用。

The results from application of modifying the Ordovician paleogeomorphology and paleogeosyncline Distribution models in production demonstrate the relationship between comprehensive geology research and gas exploration. It is suggested that the predicted gas prospect area on the east of existing gas fields may continue to extend eastwards if the modified models are applied.