东营凹陷王庄地区Es3段扇三角洲砂砾岩体沉积特征分析

随着东营凹陷北部陡坡带王庄-宁海地区亿吨级稠油藏的发现,稠油成藏类型的砂砾岩扇体隐蔽油气藏勘探已经成为现阶段的油气勘探的重点目标和储量增长点之一.利用现代沉积学、测井学和地震勘探等手段,通过对王庄地区砂砾岩扇体特征研究后认为:王庄地区在早第三纪以形成沙三、四段的较高水动力能砂砾岩扇体(冲积扇、扇三角洲、近岸水下扇)沉积体为主,其中扇三角洲砂砾岩体是本区最主要的砂砾岩扇体类型,并具有较好的储集性能,是本区最主要的油气储集体;王庄地区砂砾岩扇体沉积,强烈地受制于边界构造条件;本区的砂砾岩扇体沉积及其形态均受沉积相的控制,并具有复杂多变的特征,从而直接导致了本区油气藏的聚集和分布具有复杂多变的特点.

The Characteristic of Shehejie Group of Tertiary Gritstone Fan Body in Wangzhuang Area of Dongying Depession

With the discovory of a hundred million tons' heavey oil reservor in Wangzhuan area of north steep slope in Dongying depression,gritstone fan subtle heavey -oil reservoir has become one of the key aim and reserves mounting . In this article : taking the methods of sediment and log and seism, through the researching on the charateristics of gritstone fan body in Wangzhuan area , The conclusion is : Wangzhuan area came mainly into being upper kinetic energy 3 rd and 4 rd member of the Shahejie formation gritstone fan sediment body (alluvial fan , fan delta , nearshore subaqueous fan ) during early-tertiary ; And the fan delta gritstone body is the main types of gritstone body in Wangzhuan area ; and it has the preferable reservor capability and is the dominating reservoir in Wangzhuan area . The gritstone fan sediment was mightily controlled by the boundary structure condition in Wangzhuan area . Both the gritstone fan sediment and it's configuration were controlled by deposit facies ; and it has the changeful character and is the straightforward cause of forming the changeful of mass and distribution of reservoir character in Wangzhuan area .