摘要:鄂尔多斯盆地宜川-旬邑地区长8油层组储层主要为三角洲前缘的分流河道砂体,这类储层孔渗相对较好,又离生油坳陷近,是油气富集的最有利场所。长7油层组的油页岩不仅为长8油层组储层提供优质油源,同时也作为盖层为其提供良好的封盖条件。该区具备良好的生储盖组合条件,理论上应该具备较好的产能,但该区经历的多次构造运动,使油藏的保存条件受到多次破坏,分析指出该区部分油藏为构造运动破坏后的残余油藏。因此,构造条件是控制该区长8油层组油藏分布的关键因素。
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