巴西Santos盆地Barra Velha组Aptian碳酸盐岩古岩溶特征

IF 1.3 4区 地球科学 Q3 GEOSCIENCES, MULTIDISCIPLINARY
David Chibuzor Nworie, Guilherme Furlan Chinelatto, Alexandre Campane Vidal
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引用次数: 1

摘要

利用地震资料、钻孔图像测井和常规测井资料,研究了巴西Santos盆地某试验区Barra Velha组Aptian碳酸盐岩古岩溶特征的分布和特征。利用多种地震属性来增强地震数据的细节,并突出关键地震参数,包括地层变形和几何形状、地震事件的连续性和断层模式。研究发现,岩溶构造受构造高位断裂和裂缝控制,构造高位断裂和裂缝为动态流体流动提供了通道,溶解了碳酸盐岩物质。在研究区东北部发现的几个封闭的圆形凹陷和亮点代表了可能的天坑结构。大气水、热液活动和巴雷米亚-阿普tian区域不整合面形成的地层内酸性作用导致的表生和低生作用可能是溶蚀的主要原因。本研究的局限性在于难以整合不同尺度的多个数据集。然而,在亚地震尺度上的钻孔图像为岩溶特征的赋存提供了更高的置信度。本研究的结果对巴西大陆边缘地区能源开发和碳封存举措的战略规划具有重要意义,从而有助于明智的决策。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Paleokarst features in the Aptian carbonates of the Barra Velha Formation, Santos Basin, Brazil
Seismic data, borehole image logs, and conventional well logs were used to investigate the distribution and characteristics of paleokarst features in the Aptian carbonates of the Barra Velha Formation in a pilot area of the Santos Basin, Brazil. Multiple seismic attributes were used to enhance details on the seismic data and highlight key seismic parameters including strata deformation and geometry, continuity of seismic events, and fault patterns. The study found that karst structures are controlled by faults and fractures along structural highs, which served as a conduit for the flow of dynamic fluids that dissolved the carbonate materials. Several closed, circular depressions and bright spots identified in the northeastern portion of the study area represent possible sinkhole structures. Epigenic and hypogenic processes due to the action of meteoric water, hydrothermal activity, and intra-formation acidity along regional unconformities in the Barremian-Aptian may have been responsible for the dissolution. Limitations of this study are related to the difficulty of integrating multiple datasets with various scales. However, the higher confidence for the occurrence of the karst features is provided by borehole images at the sub-seismic scale. The findings of this study hold significant relevance for the strategic planning of energy development and carbon sequestration initiatives in the Brazilian continental margins, thereby aiding in informed decision-making.
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来源期刊
Brazilian Journal of Geology
Brazilian Journal of Geology GEOSCIENCES, MULTIDISCIPLINARY-
CiteScore
3.20
自引率
7.10%
发文量
12
审稿时长
11 weeks
期刊介绍: The Brazilian Journal of Geology (BJG) is a quarterly journal published by the Brazilian Geological Society with an electronic open access version that provides an in-ternacional medium for the publication of original scientific work of broad interest concerned with all aspects of the earth sciences in Brazil, South America, and Antarctica, in-cluding oceanic regions adjacent to these regions. The BJG publishes papers with a regional appeal and more than local significance in the fields of mineralogy, petrology, geochemistry, paleontology, sedimentology, stratigraphy, structural geology, tectonics, neotectonics, geophysics applied to geology, volcanology, metallogeny and mineral deposits, marine geology, glaciology, paleoclimatology, geochronology, biostratigraphy, engineering geology, hydrogeology, geological hazards and remote sensing, providing a niche for interdisciplinary work on regional geology and Earth history. The BJG publishes articles (including review articles), rapid communications, articles with accelerated review processes, editorials, and discussions (brief, objective and concise comments on recent papers published in BJG with replies by authors). Manuscripts must be written in English. Companion papers will not be accepted.
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