摘要
目的研究鄂尔多斯盆地东北部山西组的沉积环境和沉积微相,探究沉积微相的时空分布和控制因素,为天然气勘探寻找有利储层。方法把地质、地球物理方法结合起来,应用露头、岩心、测井资料,辅之以大比例尺密集数据控制的工业制图方法。结果划分出1个相、2个亚相和9个微相,获得了各微相的地质特征和识别标志。结论有利储层为三角洲平原分流河道和三角洲前缘水下分流河道。
Aim To study sedimentary environment and microfacies of lower member of Shanxi Formation in northwest part of Ordos basin.Clarify microfacies spatial-temporal distribution and evolution and controlling factors,in order to search favorable reservoir for gas exploration.Methods Combining with geological and geophysical methods,using outcrops and core description and well log,assistant with density data controlling large-scale industry mapping.Results 1 facies and 2 subfacies and 9 microfacies were identified,assemblages of resource rock and reservoir and top seal were clarified.Geological characteristics and its identification of every microfacies were discussed.Conclusion Favorable reservoir is delta plain distributary channel and delta front subaqueous distributary.
出处
《西北大学学报（自然科学版）》
CAS
CSCD
北大核心
2007年第5期808-814,共7页
Journal of Northwest University（Natural Science Edition）
基金
国家重点基础研究发展计划基金资助项目(2003CB214602)
关键词
沉积微相
山西组
靖边气田
鄂尔多斯盆地
Shanxi Formation
microfacies characteristics
Jingbian Gasfield
Ordos Basin
