Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2016-07-25T19:35:28Z No. of bitstreams: 1 EvertonNobregaBarbosa_DISSERT.pdf: 9232296 bytes, checksum: 5cd3f1d1ccd18c21370731922d1da077 (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2016-07-28T23:19:32Z (GMT) No. of bitstreams: 1 EvertonNobregaBarbosa_DISSERT.pdf: 9232296 bytes, checksum: 5cd3f1d1ccd18c21370731922d1da077 (MD5) / Made available in DSpace on 2016-07-28T23:19:32Z (GMT). No. of bitstreams: 1 EvertonNobregaBarbosa_DISSERT.pdf: 9232296 bytes, checksum: 5cd3f1d1ccd18c21370731922d1da077 (MD5) Previous issue date: 2015-08-24 / Ag?ncia Nacional do Petr?leo - ANP / A Sequ?ncia Neocarbon?fera-Eotri?ssica corresponde ao terceiro grande ciclo sedimentar da Bacia do Parna?ba e concerne litoestratigraficamente ao Grupo Balsas. Esta sequ?ncia ? descrita como um pacote de rochas cujos sedimentos foram depositados em um ambiente complexo, cl?stico/evapor?tico de mar raso, gradando para um ambiente lacustre/des?rtico. O principal objetivo deste trabalho foi realizar uma an?lise estratigr?fica da Sequ?ncia Neocarbon?fera-Eotri?ssica, visando uma melhor compreens?o da sua evolu??o. Para tal, foram empregados os conceitos modernos e gen?ticos da estratigrafia, utilizando-se como base de dados informa??es de po?os e se??es s?smicas. Para o intervalo estratigr?fico em quest?o foram identificadas tr?s sequ?ncias deposicionais. A Sequ?ncia 1 corresponde a rochas que foram depositadas inicialmente a partir de um sistema fluvial, que passa para um sistema marinho raso implantado durante uma fase transgressiva, e que posteriormente evolui para um sistema deltaico. A Sequ?ncia 2 corresponde a rochas que foram depositadas a partir de um ambiente lacustre/des?rtico, representando uma fase regressiva importante que culmina com a implanta??o de um ambiente des?rtico, o qual corresponde ? Sequ?ncia 3. Na an?lise sismoestratigr?fica foi poss?vel reconhecer as superf?cies cronoestratigr?ficas e as unidades gen?ticas identificadas em po?os e analisar a sua express?o lateral. De modo geral, as sismof?cies reconhecidas nas se??es s?smicas apresentam-se com configura??es paralelas a subparalelas, com grande continuidade lateral, sugerindo uma const?ncia na taxa de sedimenta??o durante a deposi??o desta sequ?ncia. / The Parna?ba Basin consists in an intracratonic basin whose sucession of rocks is arranged in five supersequences. The Upper Carboniferous-Lower Triassic Sequence represents the third major sedimentary cycle and corresponds to Balsas Group, which is divided into four units: Piau? Formation, Pedra de Fogo Formation, Motuca Formation and Samba?ba Formation, from base to top. Different interpretations have been made by several authors in recent decades to interpreted the depositional system and environments related to each unit that belongs to this sequence. In general way, it is described as a thick pack of siliciclastic sediments deposited under complex conditions, varying from clastic/evaporitic shallow marine to lacustrine and desert environment. Aiming to clarify the sedimentary sequence evolution, this work underwent a stratigraphic analysis of the Upper Carboniferous-Lower Triassic deposits by applying modern concepts of the sequence stratigraphy based on well and seismic database. Three main depositional sequences of higher frequency were identified in each well analyzed. The sequence 1 corresponds to rocks initially deposited by a fluvial system with braided channel characteristics which evolved to shallow marine with coastal sabkha conditions related to a transgressive stage, that later evolved to a deltaic system. The Sequence 2 corresponds to rocks deposited in a lacustrine/desert environment associated with sabkha generated during a period of increased aridity in which the area occupied by the Parna?ba Basin had been suffering. The registration of a major regressive phase is shown in Sequence 2 which evolved to a dominantly desert environment recorded in Sequence 3. Seismic stratigraphy analyses allow to define a series of stratigraphic surfaces and related genetic units, as well as to infer its lateral expression. Seismic facies associated with such sequences are dominantly parallel and sub-parallel, with good lateral continuity, suggesting the sedimentary rate was relatively constant during deposition.