南堡凹陷火山岩空间展布特征及其控藏作用

发布时间：2018-07-13 16:15

【摘要】：以钻井、测井、地震资料和油气勘探成果为基础,探讨了南堡凹陷新生代火山岩空间展布规律及差异控藏作用。研究表明南堡凹陷主要发育沙三段、沙一段、东三段、东一段和馆陶组5套火山岩组合,平面上主要分布于盆地西北部,受NW向、近EW向断层控制。不同层位的火山岩具有不同的控藏作用,沙河街组火山岩对烃源岩热成熟具有明显的促进作用,同时由于沙三段、沙一段主要为欠补偿沉积,砂岩不发育,火山岩在深层储集能力优于同等埋深的砂岩,是深部储层的有利补充;东营组和馆陶组火山岩具有较好的构造背景,为后期圈闭的形成奠定了基础;馆陶组巨厚的玄武岩是区域性盖层,为油气富集提供了封盖条件。
[Abstract]:Based on drilling, logging, seismic data and oil and gas exploration results, the spatial distribution of Cenozoic volcanic rocks and differential reservoir control in Nanpu Sag are discussed. The study shows that five sets of volcanic rock assemblages are mainly developed in Nanpu Sag, namely the third member of Sha 3, the first member of Sha 1, the third member of East part, the first member of East part and the Guantao formation, which are mainly distributed in the northwestern part of the basin and controlled by NW direction and near EW direction fault. Volcanic rocks in different formations have different reservoir controlling activities. Volcanic rocks of Shahejie formation have obvious promoting effect on thermal maturity of source rocks. Meanwhile, because of the undercompensated deposits, sandstone is not developed in the first member of Shahejie formation. Volcanic rocks in deep reservoirs are superior to sandstone with the same buried depth, which is a favorable supplement to deep reservoirs, and the volcanic rocks of Dongying formation and Guantao formation have a good tectonic background, which lays a foundation for the formation of late traps. The extremely thick basalt of Guantao formation is a regional caprock, which provides sealing conditions for oil and gas enrichment.
【作者单位】：中国地质大学能源学院;河南油田采油二厂井楼采油管理区;
【基金】：国家科技重大专项“渤海湾盆地精细勘探关键技术”(2011ZX05006-006)
【分类号】：P618.13

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