Albian carbonate reservoir: rock-log integration

Submitted by Taís Silva (taismoreira001@gmail.com) on 2021-01-29T17:36:20Z No. of bitstreams: 1 LuanaKarinaCamaraDeMedeiros-min.pdf: 4390287 bytes, checksum: 37de4cac807c3fd757871be57ebf2cec (MD5) Approved for entry into archive by Moreno Barros (moreno@ct.ufrj.br) on 2021-04-05T01:10:10Z (GMT) No. of bitstreams: 1 LuanaKarinaCamaraDeMedeiros-min.pdf: 4390287 bytes, checksum: 37de4cac807c3fd757871be57ebf2cec (MD5) Made available in DSpace on 2021-04-05T01:10:10Z (GMT). No. of bitstreams: 1 LuanaKarinaCamaraDeMedeiros-min.pdf: 4390287 bytes, checksum: 37de4cac807c3fd757871be57ebf2cec (MD5) Previous issue date: 2019-06 As rochas carbonáticas são os principais reservatórios de hidrocarbonetos, retêm mais da metade do petróleo do mundo. São suscetíveis às condições deposicionais e diagenéticas, e apresentam características petrofísicas complexas, que normalmente são pouco entendidas. Nesse contexto, é importante caracterizar as principais fácies deposicionais carbonáticas, identificar os processos diagenéticos atuantes e classificar os diferentes tipos de poros e conectividade entre eles, com o intuito de auxiliar no controle e gerenciamento desses importantes reservatórios de petróleo. Nesse trabalho, foi possível caracterizar as diferentes fácies permoporosas nos carbonatos do Albino, em um poço da Bacia de Campos, através dos estudos sedimentológicos e diagenéticos, com perfis geofísicos e métodos estatísticos, sendo posteriormente correlacionados com o intuito de verificar suas similaridades. A metodologia aplicada possibilitou o reconhecimento de duas a três eletrofácies com distintas características permoporosas, através da obtenção de eletrofácies associadas aos estudos petrográficos e petrofísicos. A eletrofácie de melhor qualidade reservatório corresponde a litologia composta por bioclastos, correspondendo a microfácies rudstone bioclástico (RB), a qual mantem relação direta com as propriedades petrofísicas e as eletrofácies. A correlação das propriedades petrofísicas com as microfácies deposicionais demostrou ser bastante complexa devido aos processos diagenéticos. Carbonate rocks are the main reservoirs of hydrocarbons, retaining more than half of the world’s oil. They are susceptible to depositional and diagenetic conditions. These exhibit complex and commonly poorly understood petrophysical characteristics. In this context, it is important to characterize the main depositional carbonate facies, to identify the active diagenetic processes and to classify the different types of pores and connectivity between them, in order to assist in the control and management of these important oil reservoirs. In this work, it was possible to characterize the different permo-porous facies in the Albian carbonates, from oil and gas well of the Campos Basin. Sedimentologic and diagenetic studies, with well log data and statistical methods, were carried out to verify their similarities. The applied methodology allowed the recognition up to three electrofacies with different permo-porous characteristics, through the obtaining of electrofacies associated to the petrographic and petrophysical studies. The electrofacies of the best reservoir quality corresponds to the lithology composed of bioclasts, corresponding to bioclastic rudstone (RB) microfacies, which keeps a direct relationship with the petrophysical properties and the electrofacies. The correlation of the petrophysical properties with the depositional microfacies proved to be quite complex, due to the diagenetic processes.