鄂尔多斯盆地长8油层组浅水三角洲沉积特征及其地质意义
Journal of Oil and Gas Technology(2013)
Abstract
根据沉积标志、砂体结构、测井响应及盆地底形等特征,认为鄂尔多斯盆地长8油层组发育浅水三角洲沉积,具有地层厚度稳定、植物化石及动物遗迹化石发育、浅水沉积构造明显等特点;由于水体较浅,湖岸线迁移频繁且迁移范围大,在长82油层沉积期形成沿湖岸线分布的坨状砂体(滩坝砂),在长81油层沉积期分流河道砂体交汇连片,且向湖中心延伸较远;这些砂体为有利储集体,是勘探评价的主要目标。
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Key words
Ordos Basin,sand prediction,Chang 8 Formation,shallow delta
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