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Previous issue date: 2004-11-30 === In the current work are presented the results about the study of digital mapping of analogs referents the fluvial oil reservoirs in the A?u Formation. With the regional recognizing in the south corner of Potiguar Basin was selected a area of 150 Km square in the west of Assu city. In this area was chosen the outcrops for the digital mapping and from the data fields and remote sensors were done the depositional architectural for the fluvial deposits, which it was named coarse meandering fluvial systems. In the deposits were individualized 3 (three) fluvial cycles, which they was separated by bounding surface of fifth order. Such cycles are preferentially sandy, with fining-upward sequence finished in flood plain deposits. Inner of the sandy levels of the filling channels were characterized least cycles, normaly incomplete, constituted by braided sandy bodies and bounding surfaces of fourth order. In the mapped area was chosen a outcrop with great exposition, where it was possible to see tipical deposits of filling channel and was in this outcrop that was done the digital mapping. In this outcrop was used diverse technics and tools, which they integrated sedimentological, altimetric (GPS, Total Station), LIDAR (Light Detection and Ranging), digital photomosaic of high resolution and of the inner geometries (Ground Penetration Radar) data sets. For the integrating, interpretation and visualization of data was used software GoCAD?. The final product of the outcrop digital mapping was the photorealistic model of part of the cliff (or slope) because the observed reflectors in the radargrams were absents. A part of bar oblique accretion was modeled according to GPR gride of 200x200 meters in the alluvial Assu river probable recent analog. With the data of inner geometries was developed the three-dimentional sedimentary architectural, where it was possible characterize sand sheet deposits and many hierarchy of braided channels. At last, simulations of sedimentary geometries and architectures of the Potiguar Basin Fluvial Reservoirs were done with PetBool software, in order to understand the capacity of this program in simulations with a lot of numbers of conditioning wells. In total, 45 simulations was acquired, where the time and the channel numbers increase in relation of the conditioning wells quantity. The deformation of the meanders was detected from the change of simulated dominion dimensions. The presence of this problem was because the relationship between the simulated dominion and the width of the meander === Nesta disserta??o s?o apresentados os resultados referentes ao estudo de mapeamento digital de an?logos a reservat?rios petrol?feros fluviais da Forma??o A?u. Com base no reconhecimento regional na borda sul da Bacia Potiguar foi selecionada uma ?rea de 150 km2 a oeste da cidade de Assu onde foram escolhidos os afloramentos para o mapeamento digital. Nesta ?rea a partir de dados de campo e de sensores remotos foi montada a arquitetura deposicional para os dep?sitos fluviais, onde foi interpretado um sistema fluvial meandrante de granulometria grossa. Nos dep?sitos foram individualizados 3 ciclos fluviais, separados por superf?cies limitantes de 5a ordem. Tais ciclos s?o predominantemente arenosos, com granodecresc?ncia ascendente, culminando em dep?sitos de plan?cie de inunda??o. Internamente aos n?veis arenosos de preenchimento de canal foram caracterizados ciclos menores, normalmente incompletos, formados por corpos predominantemente arenosos, amalgamados e limitados por superf?cies de 4a ordem. Na ?rea mapeada foi escolhido um afloramento com grande exposi??o em corte, representado por t?picos dep?sitos de preenchimento de canal, onde foi realizado o mapeamento digital. Neste afloramento foram empregadas diferentes t?cnicas e ferramentas, integrando dados sedimentol?gicos, altim?tricos (Esta??o Total, GPS), LIDAR (Light Detection and Ranging), fotomosaicos digitais de alta resolu??o e de geometria interna (Ground Penetrating Radar). A integra??o, interpreta??o e visualiza??o dos dados foi realizada no programa GoCad?. Devido ? aus?ncia de refletores observada nos radargramas, o produto final no mapeamento digital do afloramento foi o modelo fotoreal?stico de parte da escarpa do afloramento. Foi modelado tamb?m parte de uma barra de acres??o obl?qua, segundo uma malha de GPR de 200x200 m no aluvi?o do Rio Assu, suposto an?logo recente. Com os dados da geometria interna foi montada a arquitetura sedimentar tridimensional, onde foram caracterizados um dep?sito em len?ol (sand sheet) e v?rias hierarquias de canais amalgamados. Por fim, foram realizadas simula??es da geometria e arquitetura sedimentar de um reservat?rio fluvial da Bacia Potiguar com o programa PetBool, com objetivo de avaliar o desempenho deste software em simula??es com grande n?mero de po?os condicionantes. Foram gerados no total 45 simula??es, o tempo gasto e o n?mero de canais gerados nestas aumentavam em fun??o da quantidade de po?os condicionantes. Foi detectada a deforma??o dos meandros a partir da mudan?a das dimens?es do dom?nio simulado, a ocorr?ncia deste problema foi devido ? rela??o direta entre o dom?nio simulado e o comprimento do meandro
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