气候变化领域集成服务门户(CCPortal): Unsupervised seismic facies classification applied to a presalt carbonate reservoir, Santos Basin, offshore Brazil

CCPortal

DOI	10.1306/10261818055
	Unsupervised seismic facies classification applied to a presalt carbonate reservoir, Santos Basin, offshore Brazil
	Ferreira D.J.A.; Lupinacci W.M.; De Andrade Neves I.; Zambrini J.P.R.; Ferrari A.L.; Gamboa L.A.P.; Azul M.O.
发表日期	2019
ISSN	0149-1423
卷号	103 期号:4
英文摘要	Mapping of seismic and lithological facies is a very complex process, especially in regions with low seismic resolution caused by extensive salt layers, even when only an exploratory view of the distribution of the reservoir facies is required. The aim of this study was to apply multi-attribute analysis using an unsupervised classification algorithm to map the carbonate facies of an exploratory presalt area located in the Outer high region of the Santos Basin. The interval of interest is the Barra Velha Formation, deposited during the Aptian, which represents an intercalation of travertines, stromatolites, grainstones and spherulitic packstones, mudstones, and authigenic shales, which were deposited under hypersaline lacustrine conditions during the sag phase. A set of seismic attributes, calculated from a poststack seismic amplitude volume, was used to characterize geological and structural features of the study area. We applied k-means clustering in an approach for unsupervised seismic facies classification. Our results show that at least three seismic facies can be differentiated, representing associations of buildup lithologies, aggradational or progradational carbonate platforms, and debris facies. We quantitatively evaluated the seismic facies against petrophysical properties (porosity and permeability) from available well logs. Seismic patterns associated with the lithologies helped identify new exploration targets. Copyright ©2019. The American Association of Petroleum Geologists. All rights reserved.
语种	英语
scopus关键词	Carbonation; K-means clustering; Lithology; Offshore oil well production; Petrophysics; Seismic prospecting; Seismology; Well logging; Carbonate platforms; Carbonate reservoir; Exploration targets; Multi-attribute analysis; Petrophysical properties; Seismic amplitudes; Seismic facies classification; Unsupervised classification; Subsalt strata; algorithm; Aptian; carbonate system; facies; lithology; reservoir; unsupervised classification; Atlantic Ocean; Brazil; Santos Basin
来源期刊	AAPG Bulletin
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/125023
作者单位	Department of Geology and Geophysics, Universidade Federal Fluminense, Brazil; Petrogal, Brazil
推荐引用方式 GB/T 7714	Ferreira D.J.A.,Lupinacci W.M.,De Andrade Neves I.,et al. Unsupervised seismic facies classification applied to a presalt carbonate reservoir, Santos Basin, offshore Brazil[J],2019,103(4).
APA	Ferreira D.J.A..,Lupinacci W.M..,De Andrade Neves I..,Zambrini J.P.R..,Ferrari A.L..,...&Azul M.O..(2019).Unsupervised seismic facies classification applied to a presalt carbonate reservoir, Santos Basin, offshore Brazil.AAPG Bulletin,103(4).
MLA	Ferreira D.J.A.,et al."Unsupervised seismic facies classification applied to a presalt carbonate reservoir, Santos Basin, offshore Brazil".AAPG Bulletin 103.4(2019).