Stratigraphic evolution from the early albian to late Campanian of the Potiguar Basin, Northeast Brazil: An approach in seismic scale,Basin Research

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Stratigraphic evolution from the early albian to late Campanian of the Potiguar Basin, Northeast Brazil: An approach in seismic scale
Basin Research ( IF 2.8 ) Pub Date : 2019-10-22 , DOI: 10.1111/bre.12414
Anderson H. Melo _{1,

2} , Peryclys R. O. Andrade ₁ , Antonio J. C. Magalhães _{2,

3} , Daniel G. C. Fragoso _{1,

4} , Francisco P. Lima‐Filho _{2,

5}

Affiliation

[The five 3rd order depositional sequences interpreted in Albian do Campanian interval of Potiguar Basin, as well the system tracts, and its relation with the lithostratigraphic units. The Acu Formation, main oil‐bearing formation of the basin, in inserted in the Depositional Sequences 1 to 3 context. , Abstract Five 3rd‐order depositional sequences are interpreted from the early Albian to late Campanian interval in the Potiguar Basin. An integrated analysis of seismic interpretations, well logs, cores and biostratigraphic data provides a stratigraphic framework composed by stratigraphic surfaces, systems tracts and sequences. Depositional Sequence 1 and 2 are, respectively, Albian and early to mid‐Cenomanian aged and are composed by the falling stage, low stand, transgressive and high stand systems tracts. Depositional Sequence 3 is late Cenomanian to mid‐Turonian aged and is composed by the transgressive and high stand systems tracts. Depositional sequences 4 and 5 are, respectively, late Turonian to mid‐Santonian and late Santonian to mid‐Campanian aged and are composed only by transgressive and high stand systems tracts. The lack of falling stage and low stand systems tracts in depositional sequences 3, 4 and 5, as well the increasing in transgressive and highstand systems tracts thickness as depositional sequences get younger, are reflection of an overall transgressive trend of a 2nd‐order sequence. The interpretation proposed in this paper correlates onshore with offshore deposits within a seismic scale (3rd‐order) sequence stratigraphy framework. This approach allows a better understanding of the Acu Formation, the primary oil‐bearing formation of the Potiguar Basin. The Acu Formation is part of depositional sequences 1, 2 and 3 and is characterized by lateral and vertical variations of depositional systems instead of being associated to a specific depositional system. This sequence stratigraphy analysis can be used as a low‐resolution framework for future high‐resolution (4th‐order scale) studies.]

中文翻译：

巴西东北部 Potiguar 盆地早阿尔比世至晚坎帕世地层演化：地震尺度的方法

[Potiguar 盆地Albian do Campanian 层段解释的五个三级沉积层序、系统域及其与岩石地层单元的关系. Acu 组是盆地的主要含油地层，插入在沉积层序 1 至 3 中。, 摘要 Potiguar 盆地从早阿尔布阶到晚坎帕阶地层解释了五个三级沉积层序。对地震解释、测井、岩心和生物地层数据的综合分析提供了由地层表面、系统域和层序组成的地层框架。沉积层序 1 和 2 分别为阿尔布阶和早到中森曼阶，由下降阶段、低位、海进和高位系统域组成。沉积层序 3 为晚森诺曼阶至中土伦阶，由海进系统域和高位系统域组成。沉积层序 4 和 5 分别为晚土伦阶至中桑托阶和晚桑托阶至中坎帕阶，仅由海进和高位系统域组成。沉积层序 3、4、5 缺乏下降期和低水位系统域，随着沉积层序年轻化，海侵和高水位系统域厚度增加，反映了整体的二阶层序海进趋势。本文提出的解释在地震尺度（三级）层序地层框架内将陆上与海上沉积物相关联。这种方法可以更好地了解 Acu 形成，Potiguar 盆地的主要含油地层。Acu 组是沉积序列 1、2 和 3 的一部分，其特征是沉积系统的横向和垂直变化，而不是与特定的沉积系统相关联。该层序地层分析可用作未来高分辨率（四阶尺度）研究的低分辨率框架。]

更新日期：2019-10-22

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