作　　者： ; ; ; ; (陈全红）;

机构地区： 西北大学地质学系大陆动力学国家重点实验室

出　　处： 《西北大学学报（自然科学版）》 2013年第1期81-88,共8页

摘　　要： 目的分析鄂尔多斯盆地富黄探区延长组浊积岩、浊积相特征,探究其油气富集规律。方法对钻井、露头及岩心资料进行分析,采用野外观察与室内研究相结合的方法进行研究。结果研究区浊积岩以粉—细砂岩为主,具有分选中等,磨圆较差,结构成熟度和成分成熟度低,高长石、低石英的组分特征。区内主要发育含泥砾及泥屑块状砂岩相,块状砂岩相,薄层粉—细砂岩相,不规则砂、泥岩互层相及滑塌砂岩相,岩心观察可发现较多的浊流沉积层内、层面构造。结论研究区长7—长4+5均发育浊流沉积,并以坡移浊积扇和滑塌浊积扇两种亚相为主,前者可识别出中扇和下扇两个微相,后者在区内分布有限。在时间及平面上,长7—长4+5段浊积扇的规模、分布范围逐渐变小,在中扇、下扇物性较好的区域均可形成较好的储层;富黄探区槐树庄林场坡移浊积扇的主要分布区为浊积岩的有利勘探区,是下一步重点勘探的区域。 Aim To study in Ordos Basin. Methods the turbidity current deposit and hydrocarbon accumulation of Fuhuang exploration area Data analysis and field study the study area develops massive sandtone facies with gravel and mud debirs, massive sandtone facies, thin powder-fine sandtone facies, irregular sandstone interbeded with mudstone facies and slide sandtone facies. Results The turbidite was mainly powder-fine sandstone, characterized by miding separation, rounding poor, low compositional and textural maturities, high feldspar and low quartz in Fu- huang exploration area, Ordos Basin. Core observation can find many turbidity layer structure. Based on previous studies and core observation, it is found that turbidity current deposit in Chang 7 to Chang 4 ＋ 5 oil reservoirs of Yanchang Formation in study area, with two main sub facies slope turbidite fan and slide turbidite fan, the former can be identified in mid-fans and outer fans, the letter limit distribution in the region. Conclusion In terms of the time and plane, the turbidite fans＇ size and distribution range becomes smaller from Chang 7 to Chang 4 ＋ 5. The better physically reservoir area can be formed in mid-fan and outer-fan. The slope turbidite fan of Huaishuzhuang frame in the study area has delineated the turbidite favorable area for exploration, forcusing exploration area.

关 键 词： 鄂尔多斯盆地 富黄探区 浊流沉积 油气聚集

领　　域： [天文地球]