吴起油田白土沟油区长9-1油藏分布规律研究

Research on Distribution of Chang 9-1 Oil Reservoir in Baitugou Block of Wuqi Oilfield

白土沟油区近年来新发现的长9油藏,其分布规律认识不清,开发效果较差。为进一步研究油气富集规律,通过“相控建模”方法,建立储层三维地质模型,分析沉积相、烃源岩与构造关系;结合油藏剖面与平面分布特征,认为研究区长9油层主要烃源岩为李家畔页岩,油气进行简单的初次运移后向高部位富集;长9-1小层油层面积分布广、连片性好,为研究区主要的开发层系。

In recent years,Chang9 reservoir was newly discovered in Baiyungou oil area. However, due to the lack of understanding of its distributional features, its development effect was poor. In order to study its enrichment patterns, by using Facies-controlled Modeling Technology, its three-dimensional geological model was established, and its sediemntary facies and the relationship between source rocks and structures were analyzed. Combined with reservoir section and its plane distribution, it was pointed out that the main resource rocks of Chang 9 is Lijiaban shale. After simple primary migration, the oil and gas gathered at the high parts. The Chang 9-1 oil layer has large distribution area and perfect continuity, so it is the main developing layer of the field.