...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Asian earth sciences >Depositional characteristics and reservoir potential of Paleogene sediment gravity flow deposits on a faulted slope of the Zhanhua Sag, Bohai Bay Basin, China
【24h】

Depositional characteristics and reservoir potential of Paleogene sediment gravity flow deposits on a faulted slope of the Zhanhua Sag, Bohai Bay Basin, China

机译：渤海湾盆地沾化凹陷断层斜坡上古近纪沉积物重力流沉积物的沉积特征和储层潜力

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Deep-water sandstones related to sediment gravity flows are becoming an increasingly important exploration domain in continental rift basins in China. However, ambiguities remain regarding the initiation, evolution, and deposition of sediment gravity flows on faulted slopes, where step faults are commonly developed. To address the uncertainties related to these processes, grain size analysis, lithofacies analysis, logging interpretation, and seismic interpretation were employed to study Paleogene sediment gravity flow deposits from well cores on a faulted slope in the Zhanhua Sag of the Bohai Bay Basin. Twelve lithofacies related to sediment gravity flows were recognized and attributed to intrabasinal sediment gravity flows (ISGFs) induced by slope failures and extrabasinal sediment gravity flows (ESGFs) generated by floods. Active faults were important triggers for ISGFs on the faulted slope in the Zhanhua Sag. The fault activity rate had a prominent role in determining the volume of re-transported sediments, which further influenced the evolution of the resulting flows. Travelling across multiple faults downslope, ISGFs generally underwent considerable velocity losses, with the result that almost all sediments were deposited in shallow water. Moreover, unconsolidated ISGF deposits could be transported again to generate sediment gravity flows, obscuring the depositional characteristics of ISGFs. ESGFs originated from rivers during floods and involved the transformation of cohesive into turbulent hyperpycnal flows. In humid and warm climates, active sag-border faults favoured the generation of long-lived ESGFs. These flows usually travelled along intra-sag faults and therefore considerable volume of sediments could be transferred into deep water. The resulting thick-bedded hyperpycnites contributed substantially to the reservoirs of Bonan Oilfield. Meanwhile, short-lived ESGFs usually generated in the regions where sag-border faults were extinct. They generally travelled down the faulted slope and deposited sediments in shallow water. These features suggest that the initiation, evolution, and deposition of sediment gravity flows on the faulted slope are mainly controlled by faults and climate. Hyperpycnites can serve as excellent reservoirs for hydrocarbon accumulation and they are probably common in other sags of the Bohai Bay Basin.
机译：与沉积物重力流有关的深水砂岩正在成为中国大陆裂谷盆地日益重要的勘探领域。但是，关于沉积物重力流在断层斜坡上的形成，演化和沉积的模棱两可，在断层斜坡上通常发育阶跃断层。为解决与这些过程有关的不确定性，采用了粒度分析，岩相分析，测井解释和地震解释研究了渤海湾盆地沾化凹陷断层斜坡上井心的古近纪沉积物重力流沉积。认识到与沉积物重力流有关的十二个岩相，并将其归因于边坡破坏引起的基底内沉积物重力流（ISGF）和洪水产生的基底外沉积物重力流（ESGF）。活动断层是沾化凹陷断层斜坡上ISGF的重要诱因。断层活动率在确定再输运沉积物的体积方面起着重要作用，这进一步影响了所产生的水流的演变。 ISGF穿越多个断层下坡时，通常会遭受相当大的速度损失，结果几乎所有沉积物都沉积在浅水中。此外，未固结的ISGF沉积物可以再次运输以产生沉积物重力流，从而掩盖了ISGF的沉积特征。 ESGF起源于洪水期间的河流，并涉及将粘性流体转化为湍流的高脓液流。在潮湿和温暖的气候中，活跃的垂下边界断层有利于长寿命ESGF的产生。这些流动通常沿着凹陷内的断层流动，因此大量的沉积物可以转移到深水中。由此产生的厚层高辉石对博南油田的储层有很大贡献。同时，寿命短的ESGF通常在凹陷边界断裂已消失的地区产生。它们通常沿着断层斜坡行进，并在浅水中沉积沉积物。这些特征表明，断层斜坡上泥沙重力流的产生，演化和沉积主要受断层和气候的控制。高辉石可以作为油气成藏的极好储层，它们可能在渤海湾盆地的其他凹陷中很常见。

著录项

  • 来源
    《Journal of Asian earth sciences》 |2019年第15期|89-106|共18页
  • 作者

    Yuan Jing; Yu Guoding; Song Mingshui; Zhong Jianhui; Dong Daotao; Wang Wei; Liu Yali; Ma Lichi;

  • 作者单位

    China Univ Petr, Sch Geosci, Qingdao 266580, Shandong, Peoples R China|Qingdao Natl Lab Marine Sci & Technol, Evaluat & Detect Technol Lab Marine Resources, Qingdao 266071, Shandong, Peoples R China;

    China Univ Petr, Sch Geosci, Qingdao 266580, Shandong, Peoples R China;

    SINOPEC, Shengli Oilfield Co, Dongying 257000, Shandong, Peoples R China;

    China Univ Petr, Sch Geosci, Qingdao 266580, Shandong, Peoples R China;

    China Univ Petr, Sch Geosci, Qingdao 266580, Shandong, Peoples R China;

    China Univ Petr, Sch Geosci, Qingdao 266580, Shandong, Peoples R China;

    SINOPEC, Shengli Oilfield Co, Dongying 257000, Shandong, Peoples R China;

    SINOPEC, Shengli Oilfield Co, Dongying 257000, Shandong, Peoples R China;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Contemporaneous fault; Debris flow; Hyperpycnal flow; Climate; Sedimentary process;

    机译：同期断层;泥石流;高温流;气候;沉积过程;

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号