Validation of fault seal mechanisms in the Timor sea: an outcrop and subsurface perspective

T. Murray, W. Power, S. Sosio de Rosar, Z. Shipton, R. Lunn

Research output: Contribution to conferencePaper

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Abstract

When risking faulted structures, across-fault juxtaposition and or membrane seal are key issues. Generally, this work is done on a “best-guess” model. The application of SGR methods in reservoir / seal systems that have moderate Vshale values artificially increases predicted column heights. In a risking processes these large columns are discounted through other geologic risk factors. Faults in Miri, Sarawak, have been systematically mapped in outcrop in great detail to measure the strike variability of fault rocks. This work greatly helps to understand the limitation of membrane seal algorithms. To illustrate the implications to subsurface risking, a validation will be presented in which observed hydrocarbon water contacts are compared with probabilistic models for both juxtaposition and SGR. A comprehensive review of a set of fields in The Timor Sea shows that probabilistic juxtaposition models more accurately predict hydrocarbon water contacts than calibrated SGR single “best” technical models .
Original languageEnglish
Number of pages4
DOIs
Publication statusPublished - 8 Sep 2019
Event5th International Conference on Fault and Top Seals - Palermo, Italy
Duration: 8 Sep 201912 Sep 2019

Conference

Conference5th International Conference on Fault and Top Seals
CountryItaly
CityPalermo
Period8/09/1912/09/19

Fingerprint

Seals
Hydrocarbons
Membranes
Water
Rocks
Statistical Models

Keywords

  • membrane sealing
  • fault rocks
  • Shale Gouge Ratio
  • SGR
  • hydrocarbon reservoirs

Cite this

Murray, T., Power, W., Sosio de Rosar, S., Shipton, Z., & Lunn, R. (2019). Validation of fault seal mechanisms in the Timor sea: an outcrop and subsurface perspective. Paper presented at 5th International Conference on Fault and Top Seals, Palermo, Italy. https://doi.org/10.3997/2214-4609.201902287
Murray, T. ; Power, W. ; Sosio de Rosar, S. ; Shipton, Z. ; Lunn, R. / Validation of fault seal mechanisms in the Timor sea : an outcrop and subsurface perspective. Paper presented at 5th International Conference on Fault and Top Seals, Palermo, Italy.4 p.
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title = "Validation of fault seal mechanisms in the Timor sea: an outcrop and subsurface perspective",
abstract = "When risking faulted structures, across-fault juxtaposition and or membrane seal are key issues. Generally, this work is done on a “best-guess” model. The application of SGR methods in reservoir / seal systems that have moderate Vshale values artificially increases predicted column heights. In a risking processes these large columns are discounted through other geologic risk factors. Faults in Miri, Sarawak, have been systematically mapped in outcrop in great detail to measure the strike variability of fault rocks. This work greatly helps to understand the limitation of membrane seal algorithms. To illustrate the implications to subsurface risking, a validation will be presented in which observed hydrocarbon water contacts are compared with probabilistic models for both juxtaposition and SGR. A comprehensive review of a set of fields in The Timor Sea shows that probabilistic juxtaposition models more accurately predict hydrocarbon water contacts than calibrated SGR single “best” technical models .",
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Murray, T, Power, W, Sosio de Rosar, S, Shipton, Z & Lunn, R 2019, 'Validation of fault seal mechanisms in the Timor sea: an outcrop and subsurface perspective', Paper presented at 5th International Conference on Fault and Top Seals, Palermo, Italy, 8/09/19 - 12/09/19. https://doi.org/10.3997/2214-4609.201902287

Validation of fault seal mechanisms in the Timor sea : an outcrop and subsurface perspective. / Murray, T.; Power, W.; Sosio de Rosar, S.; Shipton, Z.; Lunn, R.

2019. Paper presented at 5th International Conference on Fault and Top Seals, Palermo, Italy.

Research output: Contribution to conferencePaper

TY - CONF

T1 - Validation of fault seal mechanisms in the Timor sea

T2 - an outcrop and subsurface perspective

AU - Murray, T.

AU - Power, W.

AU - Sosio de Rosar, S.

AU - Shipton, Z.

AU - Lunn, R.

N1 - Manuscript accepted under alternate title.

PY - 2019/9/8

Y1 - 2019/9/8

N2 - When risking faulted structures, across-fault juxtaposition and or membrane seal are key issues. Generally, this work is done on a “best-guess” model. The application of SGR methods in reservoir / seal systems that have moderate Vshale values artificially increases predicted column heights. In a risking processes these large columns are discounted through other geologic risk factors. Faults in Miri, Sarawak, have been systematically mapped in outcrop in great detail to measure the strike variability of fault rocks. This work greatly helps to understand the limitation of membrane seal algorithms. To illustrate the implications to subsurface risking, a validation will be presented in which observed hydrocarbon water contacts are compared with probabilistic models for both juxtaposition and SGR. A comprehensive review of a set of fields in The Timor Sea shows that probabilistic juxtaposition models more accurately predict hydrocarbon water contacts than calibrated SGR single “best” technical models .

AB - When risking faulted structures, across-fault juxtaposition and or membrane seal are key issues. Generally, this work is done on a “best-guess” model. The application of SGR methods in reservoir / seal systems that have moderate Vshale values artificially increases predicted column heights. In a risking processes these large columns are discounted through other geologic risk factors. Faults in Miri, Sarawak, have been systematically mapped in outcrop in great detail to measure the strike variability of fault rocks. This work greatly helps to understand the limitation of membrane seal algorithms. To illustrate the implications to subsurface risking, a validation will be presented in which observed hydrocarbon water contacts are compared with probabilistic models for both juxtaposition and SGR. A comprehensive review of a set of fields in The Timor Sea shows that probabilistic juxtaposition models more accurately predict hydrocarbon water contacts than calibrated SGR single “best” technical models .

KW - membrane sealing

KW - fault rocks

KW - Shale Gouge Ratio

KW - SGR

KW - hydrocarbon reservoirs

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M3 - Paper

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Murray T, Power W, Sosio de Rosar S, Shipton Z, Lunn R. Validation of fault seal mechanisms in the Timor sea: an outcrop and subsurface perspective. 2019. Paper presented at 5th International Conference on Fault and Top Seals, Palermo, Italy. https://doi.org/10.3997/2214-4609.201902287