当前位置: X-MOL 学术J. South Am. Earth Sci. › 论文详情
Wave-dominated lacustrine margin, Aptian pre-salt, Mucuri Member, Espírito Santo Basin
Journal of South American Earth Sciences ( IF 1.655 ) Pub Date : 2019-12-28 , DOI: 10.1016/j.jsames.2019.102490
Camila Eliza Althaus; Claiton Marlon dos Santos Scherer; Juliano Kuchle; Adriano Domingos dos Reis; João Pedro Formolo Ferronatto; Luiz Fernando De Ros; Tatiana Pastro Bardola

The Espírito Santo Basin, one of the Brazilian marginal basins formed during the Gondwana break-up, has been the subject of many studies due to its important hydrocarbons accumulations, comprising three main depositional units – rift, sag and drift phases (Winter et al., 2007). The Mucuri Member sandstones are the Aptian sag phase related, onshore reservoirs deposited at the margins of the lacustrine system were the pre-salt (pre-evaporitic succession) lacustrine carbonate reservoirs were generated. The main objective of this article focuses on the stratigraphic and sedimentological definition of depositional model from the top of Mucuri Member, in the transition to Itaúnas Member evaporites of Mariricu Formation, since the depositional conditions of this interval until date remain a subject of discussions and can contribute to the understanding of the correlated pre-salt reservoirs. Core description in detailed scale (1:50) associated with gamma-ray logs allowed the identification of nineteen facies, grouped into five facies associations: gravelly fluvial channel, poorly confined fluvial channels, upper shoreface, lower shoreface and offshore. Stacking patterns of facies associations allowed the definition of four cycles: T, T-R, normal R and forced R cycles. Although these cycles are easily recognizable in the cores, their correlation between wells was not possible. Geochemical analyses of 87Sr/86Sr ratio from anhydrites layers interbedded with the Mucuri sandstones confirmed a non-marine composition for the precipitating fluids. The integrated evidence suggests a wave dominated lacustrine environment for the subaqueous Mucuri Member deposits.
更新日期:2020-01-04

 

全部期刊列表>>
2020新春特辑
限时免费阅读临床医学内容
ACS材料视界
科学报告最新纳米科学与技术研究
清华大学化学系段昊泓
自然科研论文编辑服务
中国科学院大学楚甲祥
中国科学院微生物研究所潘国辉
中国科学院化学研究所
课题组网站
X-MOL
北京大学分子工程苏南研究院
华东师范大学分子机器及功能材料
中山大学化学工程与技术学院
试剂库存
天合科研
down
wechat
bug