摘要
鄂尔多斯盆地西部新安边地区勘探程度低,石油勘探潜力大,为此有必要进行系统的地质研究。研究认为,烃源岩发育良好,有机质类型为腐殖-腐泥型,有机质丰度高、生油潜力大;储层以三角洲前缘水下分流河道砂体为主;油源分析表明延长组原油主要来自长7烃源岩;区域上分布四套盖层,盖层分布广,发育较为稳定;连通砂体和裂缝发育带是油气运移的主要通道;生储盖配置良好,形成了长8油藏为"新生古储",长4+5-长6油藏为"古生新储"的生储盖配置组合,而总体上延长组可认为属于"自生自储"组合类型。本区油藏类型主要为岩性油藏和构造-岩性油藏,油气勘探以寻找近油源处三角洲前缘砂体为主,低幅构造在控制成藏方面也起到了一定的作用。
It is essential to give systematic geological research to Xinanbian area, western of Ordos Basin, where the exploration degree is low and exploration potential of petroleum is big. Studies show that source rock developed ex- cellently, with humic - sapropel type high abundance of organic matter, which had good potential of oil generation. The reservoir is mainly subaqueous distributary channels in delta front. The result of oil - source rock analysis shows that crude oil is mainly from Chang7 oil shale. There are four sets of cap rocks in the area, which are widely distributed and stable. Connective sand body and fracture zone are main oil migration channels. There are excellent configurations of generation- reservation- cover, one of which is Chang8 reservoir with injection migration pattern and the other of which is Chang4 ＋ 5, Chang6 with lower generation and upper storage pattern, and on the whole, YanChang formation type belongs to self generation and self storage. The reservoir type mainly includes lithologic reservoir and structural - lithologic reservoir. Sand body in delta front near source rock is main target for exploration and low amplitude structures also play important role in reservoir forming.
出处
《延安大学学报（自然科学版）》
2013年第2期67-69,73,共4页
Journal of Yan'an University：Natural Science Edition
关键词
鄂尔多斯盆地
延长组
成藏要素
油源对比
成藏模式
Ordos basin
Yanchang formation
pool - forming elements
oil - source correlation
accumulationmodel
