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鄂尔多斯盆地晚三叠世延长期主要为内陆湖泊沉积体系,延长组发育长10—长1十个砂层组,总体来说,本区从长10到长2均发育河流及三角洲砂体,只是砂体规模不一,这为该区延长组油藏的形成提供了必要的储集条件,为了更好的开发该区域的储层油矿,以直罗采油厂大东沟长8地区为例进行研究,详细介绍了该地区储层岩石学及孔隙特征,储层的非均质性等特征。
The late Triassic Yanchang Formation in the Ordos Basin is dominated by inland lacustrine sedimentary systems. In the Yanchang Formation, there are 10 sandstones and 10 sand traps. In general, the Changjiang River basin developed from Chang 10 to Chang 2 with deltaic sand bodies, Only the sand bodies are of different sizes, which provides the necessary reservoir conditions for the formation of Yanchang Formation reservoirs in this area. In order to better develop the reservoir oil deposits in this area, the Changdonggou Chang 8 area is taken as an example Carried out research, detailing the characteristics of reservoir petrology and pore characteristics, reservoir heterogeneity and other characteristics in this area.