巴西南部圣卡塔琳娜岛浅层气震构造的形成与分布

Q2 Earth and Planetary Sciences

Brazilian Journal of Oceanography Pub Date : 2016-12-01 DOI:10.1590/S1679-87592016115506404

A. Klein, Larissa F. Demarco, Vanessa Guesser, Gabriela Reis Flemming, J. Bonetti, Diego Porpilho, A. A. Neto, Jorge Souza, C. A. Felix

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引用次数: 7

摘要

本文利用巴西南部圣卡塔琳娜岛的Conceicao泻湖(CL)和北湾(NB)两组不同的CHIRP地震记录，对浅层天然气构造的空间分布进行了分析，并对其进行了分类。使用CL的侧扫声纳数据来促进理解。利用SeisPrho软件、SonarWiz5软件对水下地震资料进行处理和解释，利用GIS进行空间扩展测量。根据地震记录中浅层含气构造的形状(回波特征)进行了圈定。在深水区，浅层天然气以渗漏形式聚集，并在地表至8.20 ms(约12.3 m)处呈现浅层气结构特征。天然气以声羽的声消隐形式聚集，也有黑影。在泻湖底部发现了麻点，与气体渗漏有关(平均直径0.97±0.19 m，密度为每50 m 54 ~ 242个单位)

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Shallow gas seismic structures: forms and distribution on Santa Catarina Island, Southern Brazil

This paper presents the spatial distribution of shallow gas structures and classifies them on the basis of two different data sets of CHIRP seismic records, one from the Conceicao Lagoon (CL) and the other from North Bay (NB), both on Santa Catarina Island, Southern Brazil. Side scan sonar data from the CL were used to facilitate the understanding. The sub bottom (SB) seismic data were processed and interpreted by means of the SeisPrho software, the side scan sonar (SSS) data by SonarWiz5 software and the spatial extension being measured with the help of GIS. The shallow gas structures were defined in accordance with their shapes in the seismic recordings (echo-character). At the CL, shallow gas accumulations were found in the form of seepages and features presenting shallow gas structures between the surface and 8.20 ms (around 12.3 m). Accumulations of gas were found in the form of Acoustic Blanking with Acoustic Plume, and also Black Shadows. Pockmarks were found on the lagoon floor and associated with gas seepages (average size diameter 0.97 ± 0.19 m and density from 54 to 242 units per 50 m

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来源期刊

Brazilian Journal of Oceanography 地学-海洋学

CiteScore

2.30

自引率

0.00%

发文量

审稿时长

>12 weeks

期刊介绍： The Brazilian Journal of Oceanography covers the entire spectrum of disciplines within the science of oceanography, publishing articles dealing with the biological oceanography, physical oceanography, marine chemistry, sedimentology and geology, from coastal and estuarine waters out to the open sea. Emphasis is placed on inter-disciplinary process-oriented contributions. BJO also publishes issues dedicated to results of scientific meetings and of large inter-disciplinary studies or topical issues on specific subjects. The audience is composed by physical, chemical and biological oceanographers, marine sedimentologists, geologists and geochemists, marine biologists and ecologists. Papers sent to BJO must present results from original research and be written in english.