中国石油大学学报（自然科学版）2017，Vol.41Issue(6)：30-40,11.DOI:10.3969/j.issn.1673-5005.2017.06.004
鄂尔多斯盆地南部延长组事件沉积与致密油的关系
Relationship between event deposits and tight oil of Yanchang Formation in Southern Ordos Basin
摘要
Abstract
Using a large number of core and and outcrop samples, and combining the drilling and logging data as well as la-boratory measurements, the relationship between the event deposits and the tight oil of Yanchang formation in southern Ordos Basin were systematically studied. The results show that there are four kinds of typical event deposits, including seismic, volcanic, anoxic and gravity flow deposit events. There are four typical combinations among these event deposits, in which the superposition of multi-stage sandy debris flow sandbody and turbidite is the most common type. Earthquakes and volcanos may induce turbidity flow, and subsequently form seismic turbidities. In addition, the combinations of oil shale, turbidite and tuff can be found clearly. The vertical model of event deposits and the typical sedimentary structure phenomena of seis-mites indicate that there were 5. 5-6. 5 magnitude earthquakes at Chang6 and Chang7 period in the study area. The event de-posit model indicates that the regions with delta front slope, semi-deep and deep lake is the most important area to record e-vent deposits. The slumping sand body in the delta front slope has the most plentiful records of event deposits. The seismic-turbidite mainly develops in deep lake area. High-quality source rocks caused by anoxic events are the source of tight oil;gravity flow sandbody is the important reservoir of tight oil; and seismic and volcanic events may improve tight reservoir. Sandy debris flow sandbodies are worth of great concern for their preferable properties and hydrocarbon potential.关键词
事件沉积/深水重力流/致密油/延长组/鄂尔多斯盆地Key words
event deposit/deep-water gravity flow/tight oil/Yanchang Formation/Ordos Basin分类
能源科技引用本文复制引用
孙宁亮,钟建华,田东恩,刘闯,曲俊利,曹梦春,杨冠群,郝兵..鄂尔多斯盆地南部延长组事件沉积与致密油的关系[J].中国石油大学学报（自然科学版）,2017,41(6):30-40,11.基金项目
国家自然科学基金项目(41572088) （41572088）
中央高校基本科研业务费专项(15CX06002A) （15CX06002A）
中国石油大学(华东)研究生创新工程(YCX2015004) （华东）
