Applying Filters and Seismic Attributes for Enhancing Faults in the 3d Seismic Survey of Alto De Siririzinho (Sergipe-Alagoas Basin, Northeast Brazil)

Abstract

ABSTRACT. The 3D seismic data allow that mature oil fields be reevaluated in order to improve the characterization of faults that affect the flow of hydrocarbons.The use of seismic attributes and filtering allows an improvement in the identification and enhancement of these fractures on seismic data. In this study, we used two different filters: the dip-steered median filter to remove random noise and increase the lateral continuity of reflections, and the fault-enhancement filter used to enhance the discontinuities of the reflections. After filtering, similarity and curvature attributes were applied in order to identify the distribution of fractures along the data. The use of these attributes and filters contributed greatly to the identification and enhancement of the continuity of the fractures.Keywords: fractured reservoir, seismic interpretation, seismic attributes. RESUMO.Com o advento da sísmica 3D, campos de petróleo maduros podem ser reavaliados melhorando a caracterização das falhas que influenciam o fluxo de hidrocarbonetos. A utilização de filtragens e atributos sísmicos possibilita uma melhora na identificação e no realce dessas fraturas no dado sísmico. No presente trabalho foram utilizados dois tipos de filtros, sendo o dip-steered median filter , com a finalidade de retirar os ruídos aleatórios e aumentar a continuidade lateral das reflexões, e o fault-enhancement filter para realçar as descontinuidades das reflexões. Após a etapa de filtragem foram aplicados os atributos de similaridade e curvatura, para se identificar a distribuição das falhas. O uso dos atributos e filtragens colaborou fortemente para a identificação e o realce da continuidade das fraturas.Palavras-chave: reservatório fraturado, interpretação sísmica e atributos sísmicos.Programa de Pós-Graduação em Geodinâmica e Geofísica -PRH-22 / Universidade Federal do Rio Grande do Norte -Avenida Senador Salgado Filho s/n,

Enhanced hydrocarbon recovery using the application of seismic attributes in fault detection and direct hydrocarbon indicator in Tomboy Field, western-Offshore Niger Delta Basin

“…For reservoir characterisation (Lunina et al, 2014;Shang et al, 2022) and seismic interpretations, seismic attributes analysis has been used by many authors (Vetrici and Stewart, 1996;Strecker et al, 2004;Ajisafe and Ako, 2013;Oguadinma et al, 2016;Oguadinma et al, 2021). It also proved its importance in the classification of the depositional environment (Ahmad and Rowel, 2013;Matos and Marfurt, 2013) and the detection and enhancement of fractures and faults (Ayolabi and Adigun, 2013;Castillo, 2010;Francelino and Antunes, 2013;Santosh et al, 2013) to give details of structural history and to provide direct hydrocarbon indicator (Adepoju et al, 2013). The seismic attribute technique is often used in seismic data processing because it can enhance geological information not observed using the conventional processing method (Ayolabi and Adigun, 2013).…”

The Application of Seismic Attributes in Fault Detection and Direct Hydrocarbon Indicator in Tomboy Field, Western-Offshore Niger Delta Basin

“…For reservoir characterisation [5][6][7][8] and seismic interpretations [9], (Oguadinma et al 2018), seismic attributes analysis has been used by many authors [10], (Strecker et al 2004); [11][12][13]. It also proved its importance in the classification of the depositional environment [14,15,16] and in the detection and improvement of fractures and faults [17][18][19][20] to give details of structural history and provide direct hydrocarbon indicator [21]. The seismic attribute technique is often used in seismic data processing because it can improve geological information not observed using the conventional processing method [17].…”