Czerniak rho ve_ii_20180801_seg_v7
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- This presentation describes a new empirical pore pressure transform method called RhoVe. RhoVe uses well log data like sonic, density, and acoustic impedance to calculate an intermediate variable RhoVe that accounts for in-situ effective stress. - RhoVe relies on established relationships between velocity-density-depth and introduces a parameter alpha that is influenced by temperature and geochemical compaction with depth. It aims to improve on existing methods by explicitly incorporating compositional and geochemical effects. - Examples are shown applying RhoVe to well data from the Gulf of Mexico to derive an effective stress profile that considers shale mineralogy, compaction trends, and ongoing chemical reactions during burial.
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Czerniak rho ve_ii_20180801_seg_v7
- 1. RhoVeTM Method (U.S. patent 2018) A New Empirical Pore Pressure Transform This presentation and all intellectual property discussed in this presentation are the property of GCS Solutions, Inc. and/or Matt Czerniak. GCS Solutions, Inc.
- 3. 3 Temperature Bands (deg F) 50 100 150 200 250 300 350 400 Dutta-Wendt Effective Stress vs Velocity by Temperature after Alberty, SPE DL Series, 2004
- 4. Dutta 2002 TLE Shallow Deep All Smectite All Illite after Dutta, 2002 TLE Dutta
- 5. Dutta 2002 TLE Shallow Deep All Smectite All Illite after Dutta, 2002 TLE Dutta
- 6. Alberty Alberty-McLean, OTC 2003 ILLITE SMECTITE after Alberty, SPE DL Series, 2004
- 7. Alberty-McLean, OTC 2003 ILLITE SMECTITE after Alberty, SPE DL Series, 2004 Temperature Bands (deg F) 50 100 150 200 250 300 350 400 Dutta-Wendt Alberty
- 8. Alberty-McLean, OTC 2003 ILLITE SMECTITE after Alberty, SPE DL Series, 2004 Alberty
- 9. after Sargent et al., 2015 Sargent
- 10. MECHANICAL COMPACTION (effective stress) Modified from University of OSLO Dept of Geosciences ONGOING CHEMICAL COMPACTION CHEMICAL COMPACTION (temperature) 4+ km 95-120 Co (200-250o F) 2-3 km 60-80 Co (140-175o F)
- 11. dT.usec/ft RHOB.G/C3 o F o F o F o F Bowers “slow” trend plateau
- 12. RhoVeTM Method
- 13. RhoVeTM T Thermodynamic Solutions (executable) Sonic, Density, Acoustic Impedance RhoVeTM Auto Compositional Changes (executable)
- 14. 1.00. 1.00. 1.00. 1.00. v-rho v-z rho-z P-z v-VES rho-VES 1.00. RhoVE-S RhoVE-ε RhoVE-ε RhoVE-S RhoVE-ε RhoVE-S RhoVE-ε RhoVE-S RhoVE-ε RhoVE-S RhoVE-ε Generalized Display 1.0 0. RhoVE-S
- 15. 1.00. 0. 1.00. v-rho rho-z P-z v-VES 1.00. rho-VES a-term 1.0 a-term v-rho 0. 1.0 v-z α 0. 1.0 Generalized Display
- 16. BOWERS GOM “Slow” Trend RhoVE-ε RhoVE-S Vo: 4790 4800 4900 A: 2953 2000 4500 B: 3.57 4.2 3 ρo: 1.3 1.3 1.3 V-Rho equation (Bowers, OTC 2001) : V = V0 + A (ρ - ρo) B γ = 2.0 RhoVE-S RhoVE-Ɛ RhoVE interm: a * (RhoVE-Ɛ– RhoVE-S) + RhoVE-S Bowers GOM “slow” trend 0.6 a-term
- 17. meters Ebrom & Heppard, 2010 0.37 0. 1.0 α : calculated property α
- 18. 1.00. 0. 1.00. v-rho rho-z P-z v-VES 1.00. rho-VES a-term 1.0 a-term v-rho 0. 1.0 v-z α 0. 1.0 v-z Generalized Display
- 19. Examples 0.0 0.56 0.75 1.08 0.99 RhoVe-S a : fractional distance a-term
- 26. BOWERS GOM “Slow” Trend RhoVE-ε RhoVE-S Vo: 4790 4800 4900 A: 2953 2000 4500 B: 3.57 4.2 3 ρo: 1.3 1.3 1.3 V-Rho equation (Bowers, OTC 2001) : V = V0 + A (ρ - ρo) B γ = 2.0 DWGoM Sub-Regional Study RhoVE interm: a * (RhoVE-Ɛ– RhoVE-S) + RhoVE-S Bowers GOM “slow” trend 0.6 a = 2α – α2 plateau plateau
- 27. BOWERS GOM “Slow” Trend RhoVE-ε RhoVE-S Vo: 4790 4800 4900 A: 2953 2000 4500 B: 3.57 4.2 3 ρo: 1.3 1.3 1.3 V-Rho equation (Bowers, OTC 2001) : V = V0 + A (ρ - ρo) B γ = 2.0 (0.37,0.60) DWGoM Sub-Regional Study RhoVE interm: a * (RhoVE-Ɛ– RhoVE-S) + RhoVE-S Bowers GOM “slow” trend 0.6 from Sargent et al., 2015 delimiter: “d” a = 2α – α2 a <= d plateau
- 28. BOWERS GOM “Slow” Trend RhoVE-ε RhoVE-S Vo: 4790 4800 4900 A: 2953 2000 4500 B: 3.57 4.2 3 ρo: 1.3 1.3 1.3 V-Rho equation (Bowers, OTC 2001) : V = V0 + A (ρ - ρo) B γ = 2.0 RhoVE interm: f(α’) * (RhoVE-Ɛ– RhoVE-S) + RhoVE-S (0.37,0.60) Bowers GOM “slow” trend 0.6 from Sargent et al., 2015 a = γα – αγ a <= d a-term f(α’) delimiter: “d”
- 31. 1.00. 1.00. v-rho v-z rho-z P-z rho-VES α delimiter v-rho 0. 1.0 α 0. 1.0 v-z α' a-term Generalized Display v-VES 0. 1.0 rho-VES 0. 1.0 ESnorm Genetically-Linked ESnorm ESnorm
- 32. 1.00. 1.00. v-rho v-z rho-z P-z rho-VES α delimiter v-rho 0. 1.0 α 0. 1.0 v-z α' a-term Generalized Display v-VES 0. 1.0 0. compositional changes ongoing chemical compaction ongoing chemical compaction rho-VES ongoing chemical compaction 1.0
- 33. 33 σ 95o C 50o C 120o C o F o F o F o F o F o F o F o F o F o F Power Law α’ = k (To F – ΔƬ)b
- 34. 34 σ 95o C 50o C 120o C o F o F o F o F o F o F o F o F o F o F Temp oF vs Depth Power Law α’ = k (To F – ΔƬ)b
- 35. 1.00. 0. 1.00. v-rho v-z rho-z P-z v-VES rho-VES ESnormESnorm α 1.0 α 0. 1.0 Genetically-Linked v-z α' 1.00. o F o Fo F o F o F o F o F o F a-term v-rho Generalized Display v-VES rho-VES 0. 1.0
- 36. 36 σ hottercolder 120o C 50o C o F o F o F o F o F o F o F o F o F o F 95o C Power Law α’ = k (To F – ΔƬ)b -55 -15 0 55 75 4 0 8 12 Tau vs. # wells
- 38. 0.0 0.51 Bowers DW GoM (Default) rhobdT sonic rhob “d”=0.51 Delimiter a-term
- 39. 0.0 0.51 Bowers DW GoM (Default) rhobdT sonic rhob “d”=0.51
- 40. 0.1 0.51 Bowers DW GoM (Default) rhobdT sonic rhob “d”=0.51 Delimiter rhobdT sonic rhob “d”=0.51
- 41. 0.2 0.51 Bowers DW GoM (Default) rhobdT sonic rhob “d”=0.51 Delimiter rhobdT sonic rhob “d”=0.51
- 42. 0.3 0.51 Bowers DW GoM (Default) rhobdT sonic rhob “d”=0.51 Delimiter rhobdT sonic rhob “d”=0.51
- 43. 0.4 0.51 Bowers DW GoM (Default) rhobdT sonic rhob “d”=0.51 Delimiter rhobdT sonic rhob “d”=0.51
- 44. 0.5 0.51 Bowers DW GoM (Default) rhobdT sonic rhob “d”=0.51 Delimiter rhobdT sonic rhob “d”=0.51
- 45. 0.6 0.51 Bowers DW GoM (Default) rhobdT sonic rhob “d”=0.51 Delimiter rhobdT sonic rhob “d”=0.51
- 46. 0.7 0.51 Bowers DW GoM (Default) rhobdT sonic rhob “d”=0.51 Delimiter rhobdT sonic rhob “d”=0.51
- 47. 0.8 0.51 Bowers DW GoM (Default) rhobdT sonic rhob “d”=0.51 Delimiter rhobdT sonic rhob “d”=0.51
- 48. 0.9 0.51 Bowers DW GoM (Default) rhobdT sonic rhob “d”=0.51 Delimiter rhobdT sonic rhob “d”=0.51
- 49. 1.0 0.51 Bowers DW GoM (Default) rhobdT sonic rhob “d”=0.51 Delimiter rhobdT sonic rhob “d”=0.51
- 52. rhob sonic AI 0 degreesΔƬ: P3 P4 P1 P2 rhobdT sonic rhob “d”=0.51 Delimiter P3 P4 P1 P2 P3 P4 P1 P2
- 58. 58
- 60. 60 Backup Slides
- 61. SUMMARY DEMOS Convergent Mode Compositional Mode
- 62. 0.51 0.51 0.00 P3 RhoVe interm: a * (RhoVE-Ɛ– RhoVE-S) + RhoVE-S 0.0
- 63. 0.60 P3 RhoVe interm: a * (RhoVE-Ɛ– RhoVE-S) + RhoVE-S 0.0
- 64. 0.60 P3 0.0
- 65. 0.1 0.60 P3
- 66. 0.2 0.60 P3
- 67. 0.3 0.60 P3
- 68. 0.4 0.60 P3
- 69. 0.5 0.60 P3
- 70. 0.6 0.60 P3
- 71. 0.7 0.60 P3
- 72. 0.8 0.60 P3
- 73. 0.9 0.60 P3
- 74. 1.0 0.60 P3
- 75. 0.9 0.60 P3
- 76. 0.8 0.60 P3
- 77. 0.7 0.60 P3
- 78. 0.6 0.60 P3
- 79. 0.5 0.60 P3
- 80. 0.4 0.60 P3
- 82. SUMMARY DEMOS Convergent Mode Compositional Mode
- 83. 0.51 0.51P3 0.0 RhoVe interm: a * (RhoVE-Ɛ– RhoVE-S) + RhoVE-S
- 84. 0.60 P3 0.0 RhoVe interm: a * (RhoVE-Ɛ– RhoVE-S) + RhoVE-S 0.60
- 85. 0.60 0.60 P3 a = 2α – α2 a <= df(α’) (0.37,0.60) delimiter: “d”
- 86. 0.0 0.60 P3
- 87. 0.1 0.60 P3
- 88. 0.2 0.60 P3
- 89. 0.3 0.60 P3
- 90. 0.37 0.60 P3
- 91. Bowers GOM “slow” trend Bowers DW GoM (Default) 0.37 0.60 P3
- 93. Bowers - 1995 SPE; 2001 OTC V = V0 + A σ B DWGOM Vo : 4930 A: 14.2 B: 0.724
- 94. 94 A = 10.5
- 95. 95 A = 12
- 96. 96 A = 13.0
- 97. 97 A = 14.2
- 98. 98 A = 16.0
- 99. 99 A = 16.0
- 100. 100 A = 16.0
- 101. 101 V = V0 + A σ B DWGOM Vo : 4100 fps A: 16.0 B: 0.724 Bowers A: 16.0 Vo: 4100 fps