鄂尔多斯盆地长9烃源岩评价

Evaluation of Source Rock of Chang 9 Member,Yanchang Formation,Ordos Basin

近年来长9优质烃源岩的发现,及相邻的长8、9、10储层中好的油气显示和工业油流的获得,表明长9可能是一套重要的潜在烃源岩。对鄂尔多斯盆地长9烃源岩生烃潜力进行了定性和定量评价。结果表明,鄂尔多斯盆地长9优质烃源岩主要集中在志丹、英旺地区,计算得出鄂尔多斯盆地长9烃源岩油气资源量分别为(2.09～4.17)×108 t和(0.06～0.12)×1011 m3。由于英旺地区排烃效率较低,资源量主要集中在志丹地区。因此,在志丹地区进行油气勘探时应考虑长9烃源岩的贡献。

In recent years,the discovery of Chang 9 Member high-quality hydrocarbon source rocks and the good hydrocarbon show and the gain of commercial oil flow in Chang 8,9,10 Reservoir,which indicate Chang 9 Member may be a set of important potential hydrocarbon source rocks.Therefore the hydrocarbon generation potential of hydrocarbon from source rock of Chang 9 Member was researched qualitatively and quantitatively.The result indicated that the quality source rock of Chang 9 Member,Yanchang Formation,Ordos Basin is mainly distributed in Zhidan and Yingwang areas.Hydrocarbon resources from source rock of Chang 9 Member in Ordos Basin are（2.09~4.17）×108 t and（0.06~0.12）×1011 m3.Because of the low expulsion efficiency of hydrocarbon in Yingwang area hydrocarbon resources mainly concentrate in Zhidan area.Therefore,hydrocarbon resources from source rock of Chang 9 Member should be considered when oil and gas exploration is conducted in Zhidan area.