DEPOSIÇÃO E EVOLUÇÃO DIAGENÉTICA DOS RESERVATÓRIOS DO MEMBRO MUCURI (CRETÁCEO INFERIOR), NOS CAMPOS DE RIO PRETO E SÃO MATEUS, BACIA DO ESPÍRITO SANTO, BRASIL

AUTOR(ES)
DATA DE PUBLICAÇÃO

1990

RESUMO

The Mucuri Member represents the rift phase of the Espírito Santo Basin stratigraphic column. It is considered one of the best oil reservoirs in the emerse portion of the basin, where the fields of the Rio Preto and Sao Mateus are located. Within the Mucuri Member, 14 litofacies were identified. These litofacies include conglomerates, shales and even evaporites. Their vertical relation and their similar depositional processes allowed the definition of 5 associations: beach, slope, channel, interchannel and lakes bottom, all deposited in a saline lake. The diagenetic evolution began just after the deposition and was probably controlled by carboxylic acids. Differences in their concentration enable he division of the diagenetic sequence in 3 intervals: early digenesis intermediate diagenses and late diagenesis. Based on sedimentary, diagenetic and petrophysic studies, 5 litofacies were characterized as reservoir facies: sandstone with cross stratification (AC), deformed sandstone (AD), massive sandstone (AM), sandstone with ripples (AO) and sandstone with planar stratification (AP). Statistic studies of the petrophysics data suggest that the reservoir facies with the best potential are those of the channel association. The occurrence of this association added to the effects of meteoric waters defines the behavior of each production zone in the Mucuri Member.

ASSUNTO(S)

bacia do espÍrito santo engenharias deposiÇÃo e evoluÇÃo diagenÉtica membro mucuri (cretÁceo inferior)

ACESSO AO ARTIGO

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