王福国,张向涛,梅廉夫,颜晖,柳保军,张忠涛,刘军

• 1:中海石油(中国)有限公司深圳分公司
• 2:中国地质大学(武汉)构造与油气资源教育部重点实验室

摘要(Abstract)：

珠江口盆地白云东区是白云凹陷2个有利成藏区之一，目前勘探正面临转向古近系深层的阶段，急需重新认识深层洼陷结构构造。为了解决珠江口盆地白云东区古近系深层缓坡带砂岩变少，与伸展型半地堑储层发育模式矛盾的问题，利用改善深层成像的重处理三维深度域地震资料及钻井数据进行综合解释，开展了白云东区古近系及基底之下滑脱面全三维构造解析。研究结果表明：按动力学机制对盆地演化阶段进行了重新划分，构造层序由一个被动裂陷旋回，修改为被动裂陷-主动裂陷-被动裂陷3个旋回；构造幕由3分细化为6个幕次，即由断陷幕-断坳转换幕-坳陷幕细化为裂陷两幕-褶皱两幕-裂陷萎缩幕-漂移幕，细分方案更好地反映了地层变形规律。地层变形方式表现为基底呈东西向挤压构造，盖层为南北向伸展构造。伸展构造发育过程中，主动裂陷旋回参与的基底盖层脱耦变形的新模式协调了白云东区古近纪构造-沉积响应，补充了主动裂陷阶段盆地充填富泥旋回的认识，挤压-伸展同步变形模式丰富了南海盆地空间演化模式，支持了白云凹陷深层新领域的勘探。

关键词(KeyWords)： 挤压-伸展变形;滑脱面;构造演化;白云凹陷;珠江口盆地

Abstract:

Keywords:

基金项目(Foundation): 中海石油(中国)有限公司深圳分公司重大生产性科研项目(CNOOC-KJ135ZDXM37SZ01SHENHAI);; 中海石油深海开发有限公司“万亿大气区”项目(KJZH-2021-0003-00)子课题“南海东部大中型天然气田勘探潜力与突破方向”

作者(Author): 王福国,张向涛,梅廉夫,颜晖,柳保军,张忠涛,刘军

DOI: 10.19509/j.cnki.dzkq.2022.0179

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