Tecnologia  Geofisica
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Tecnologia  Geofisica Tecnologia Geofisica Presentation Transcript

  • Processamento Sísmico Fundamentos Leo Nascimento
  • Falhamentos Geológicos © 2009 Halliburton. All Rights Reserved. 2
  • © 2009 Halliburton. All Rights Reserved. 3
  • © 2009 Halliburton. All Rights Reserved. 4
  • •Frequencia de Nyquist ( 2*Δ t ) -1 © 2009 Halliburton. All Rights Reserved. 5
  • © 2009 Halliburton. All Rights Reserved. 6
  • © 2009 Halliburton. All Rights Reserved. 7
  • Fluxo de Trabalho Pre-processamento empilhamento migração Geometria Análise Velan Field residual Migração Data Pre-empilhamento Estaticas Empilhamento © 2009 Halliburton. All Rights Reserved. 8
  • Pre-empilhamento Reamostragem ( 2ms 4ms ) Correção Estática ( terra ) – efeitos da zona de baixa velocidade e elevação. Remoção dos efeitos do instrumento. Remoção dos fantasmas ( mar ) Remoção dos efeitos da fonte ( mar ) Remoção Múltiplas Dominio do tiro ( FFID ) x CMP ( CDP ). © 2009 Halliburton. All Rights Reserved. 9
  • Dispositivo de registro bipartido simétrico com tiro entre as estacas (Stack-array) Dispositivo básico com seis canais Multiplicidade → 1 1 2 2 3 3 2 2 1 1 Combinação de três tiros consecutivos com IPT = IE © 2009 Halliburton. All Rights Reserved. 10
  • FAMILIA CDP © 2009 Halliburton. All Rights Reserved. 11
  • Fluxo de Trabalho Pre-processamento empilhamento migração Geometria Análise Velan Field residual Migração Data Pre-empilhamento Estaticas Empilhamento © 2009 Halliburton. All Rights Reserved. 12
  • © 2009 Halliburton. All Rights Reserved. 13
  • Correção de NMO © 2009 Halliburton. All Rights Reserved. 14
  • © 2009 Halliburton. All Rights Reserved. 15
  • © 2009 Halliburton. All Rights Reserved. 16
  • Fluxo de Trabalho Pre-processamento empilhamento migração Geometria Análise Velan Field residual Migração Data Pre-empilhamento Estaticas Empilhamento © 2009 Halliburton. All Rights Reserved. 17
  • © 2009 Halliburton. All Rights Reserved. 18
  • © 2009 Halliburton. All Rights Reserved. 19
  • © 2009 Halliburton. All Rights Reserved. 20
  • © 2009 Halliburton. All Rights Reserved. 21
  • © 2009 Halliburton. All Rights Reserved. 22
  • Sismograma de Tiros ( FFID ) © 2009 Halliburton. All Rights Reserved. 23
  • CDP ou CMP © 2009 Halliburton. All Rights Reserved. 24
  • Seção empilhada © 2009 Halliburton. All Rights Reserved. 25
  • Seção migrada © 2009 Halliburton. All Rights Reserved. 26
  • © 2009 Halliburton. All Rights Reserved. 27
  • Field Data Fluxo de Trabalho Load Geometry Mute NMO Trace Edits Deconvolution Vel CDPs DMO Filter Velocity Analysis Archival Near Traces Shots DMO Residual Statics gathers QC Shots Stack DeSignature NMO Decon Shots Mute Migration Stack Gain Filter Stk Mig QC Stack Trace Decimation Migration Multiple Rejection Smashed NMO NMO Shots Migrated Offsets Stack Demult Stack CDPs © 2009 Halliburton. All Rights Reserved. QC Stack 28 QC Stack
  • Processamento 4D © 2009 Halliburton. All Rights Reserved. 29
  • Same data processed by 6 different contractors © 2009 Halliburton. All Rights Reserved. 30
  • Respuesta tradicional de Amplitud Channel “A” Fault-Controlled Channel Amplitude Point Bar 1 0 Channel “B” analysis window length = 100ms © 2009 Halliburton. All Rights Reserved. 31 10,000 ft
  • Tuning Cube, Amplitude at Frequency = 16 hz Channel “A” North-South Extent Fault-Controlled Channel of Channel “A” Delineation Amplitude Point Bar 1 0 Channel “B” analysis window length = 100ms © 2009 Halliburton. All Rights Reserved. 32 10,000 ft
  • Tuning Cube, Amplitude at Frequency = 26 hz Channel “A” North-South Extent Fault-Controlled Channel of Channel “A” Delineation Amplitude Point Bar 1 0 Channel “B” analysis window length = 100ms © 2009 Halliburton. All Rights Reserved. 33 10,000 ft
  • © 2009 Halliburton. All Rights Reserved. 34
  • GEOFÍSICA do PETRÓLEO Tecnologia Geofísica Leo Nascimento
  • © 2009 Halliburton. All Rights Reserved. 2
  • Agenda Métodos Geofísicos Magnético Radiométrico Eletromagnético GPR sensoreamento remoto Gravitacional Sísmico © 2009 Halliburton. All Rights Reserved. 3
  • Método Gravimétrico Latitude Elevação Topografia Maré Densidade © 2009 Halliburton. All Rights Reserved. 4
  • © 2009 Halliburton. All Rights Reserved. 5
  • Correção Latitude Correção Elevação Correção Terreno © 2009 Halliburton. All Rights Reserved. 6
  • Mapa Bouguer © 2009 Halliburton. All Rights Reserved. 7
  • Mapa de Profundidade Do embasamento © 2009 Halliburton. All Rights Reserved. 8
  • Metodo Sísmico Princípio fisico Propagação de onda mecânica. Tipos de onda Corpo / Superficie Ondas Elásticas (corpo) Compressiva ( p )/Cisalhante ( s ) Propagação Reflexão / Transmissão Objetivo da aquisição Regional / semidetalhe / detalhe Tipos de aquisição Superficial / fundo do mar ( Ocean Bottom Cable ) / sismica de poço ( Vertical Seismic Profile ) Metodologia de aquisição 2D; 3D; 4D; Ambiente Mar / terra Receptores Hidrofone / geofone Fontes sísmicas Canhão de ar / explosivos Equipamento de Registro Sismógrafo Mídias de gravação Fitas Magnéticas / discos rígidos Modelos de negócios Contratados / Spec © 2009 Halliburton. All Rights Reserved. 9
  • 1º. Sismógrafo © 2009 Halliburton. All Rights Reserved. 10
  • INCIDÊNCIA DE UMA ONDA SÍSMICA Sen(Θ1) = Sen(Θ2) © 2009 Halliburton. All Rights Reserved. V1 11V2
  • O Sismograma Shot 1 * Geophones * Seismic Energy Source © 2009 Halliburton. All Rights Reserved. 12
  • Sismograma © 2009 Halliburton. All Rights Reserved. 13
  • D Shot 1 * Geophones E H V H 2 2 2 2E = (2H) + D E Dividindo por V2 T2 = to2 + (D/V)2 © 2009 Halliburton. All Rights Reserved. * 14
  • A hipérbole t0 Hipérbole t2 = t02 + D2/V2 © 2009 Halliburton. All Rights Reserved. 15
  • Offset V1 = 1500 m/s T e m V2 = 6000 m/s p o (s) V3 = 2800 m/s V4 = 4000 m/s CAÇIO 00:01 © 2009 Halliburton. All Rights Reserved. 16 OFFSET
  • Offset V1 = 1500 m/s T e m V2 = 6000 m/s p o (s) V3 = 2800 m/s V4 = 4000 m/s CAÇIO 00:02 © 2009 Halliburton. All Rights Reserved. 17 OFFSET
  • Offset V1 = 1500 m/s T e m V2 = 6000 m/s p o (s) V3 = 2800 m/s V4 = 4000 m/s CAÇIO 00:03 © 2009 Halliburton. All Rights Reserved. 18 OFFSET
  • Offset V1 = 1500 m/s T e m V2 = 6000 m/s p o (s) V3 = 2800 m/s V4 = 4000 m/s CAÇIO 01:00 © 2009 Halliburton. All Rights Reserved. 19 OFFSET
  • Dado Sintético 1500 m/s 6000 m/s 2800 m/s 4000 m/s Modelo com camada de alta velocidade © 2009 Halliburton. All Rights Reserved. 20
  • What is really going on? © 2009 Halliburton. All Rights Reserved. 21
  • What is really going on? © 2009 Halliburton. All Rights Reserved. 22
  • © 2009 Halliburton. All Rights Reserved. 23
  • © 2009 Halliburton. All Rights Reserved. 24
  • © 2009 Halliburton. All Rights Reserved. 25
  • © 2009 Halliburton. All Rights Reserved. 26
  • © 2009 Halliburton. All Rights Reserved. 27
  • © 2009 Halliburton. All Rights Reserved. 28
  • © 2009 Halliburton. All Rights Reserved. 29
  • Terrestre - Explosivo © 2009 Halliburton. All Rights Reserved. 30
  • © 2009 Halliburton. All Rights Reserved. 31
  • Geofones © 2009 Halliburton. All Rights Reserved. 32
  • © 2009 Halliburton. All Rights Reserved. 33
  • Aquisição © 2009 Halliburton. All Rights Reserved. 34