Integrated Multi-Disciplinary Analysis of the Rankin Trend Gas Reservoirs North West Shelf, Australia

Seggie, R.J.; Lang, Simon; Marshall, N; Cubitt, C.; Alsop, D. B.; Kirk, Randolph L.; Twartz, S.

doi:10.1071/aj06003

Cited by 4 publications

(1 citation statement)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Sometimes you may not get much out of the manual facies mapping, just as sometimes you get little from the 3D and more from the manual. Always attempt both facies mapping procedures as they usually complement each other-as found when mapping in the Rankin trend Triassic reservoirs (Seggie et al, 2007). Figure 7 shows some manual seismic facies maps from over 30 years ago that were part of the work that led to the discovery of the Harriet group of fields.…”

Section: Methods and Resultsmentioning

confidence: 99%

Seismic Facies Mapping-Getting More Geology into Your Play.

Kirk¹

2016

ASEG Extended Abstracts

View full text Add to dashboard Cite

Seismic facies mapping is an underutilized tool for getting extra geology in to your exploration, or development. It is a key component of palaeogeography mapping that help show different types and locations of seals and reservoirs. Both manual and automated facies mapping, on 2D and 3D seismic, when calibrated to local wells, can help de-risk crucial components of a play. In many areas today where deep water or new frontier exploration is undertaken, there is often little or no well control and seismic facies mapping, allied to analogues, may be your only tool for getting at the geology in your palaeogeography maps. This talk will apply geological models to, and discuss, the construction of manual seismic facies maps which are then used to guide automated facies map work. Manual facies mapping is undertaken once sequence boundaries have been mapped and named. Each different facies identified is given the name of upper and lower boundaries and the facies name and then the horizon is picked so that the facies extent is shown on a base map. Once completed, polygons encompass this facies. The final map uses all polygons constructed, along with well logs for that sequence. Automated facies maps start with RMS and maximum amplitude maps of the sequence, then possibly of proportional slices within the sequence and then we may construct waveform facies maps or spectral decomposition maps of the interval. All these maps are considered with the interval's isochron map and at least gamma log windows at wells, with appropriate geology transcribed to finally construct the palaeogeography map of the interval.

show abstract

Section: Methods and Resultsmentioning

confidence: 99%

Seismic Facies Mapping-Getting More Geology into Your Play.

Kirk¹

2016

ASEG Extended Abstracts

View full text Add to dashboard Cite

show abstract

Refining the Mungaroo Formation and Lower Barrow Group depositional models, Exmouth Plateau, North Carnarvon Basin: WA-390-P phase II exploration

Minken¹,

Cox²,

Buchanan³

et al. 2011

The APPEA Journal

View full text Add to dashboard Cite

Permit WA-390-P, in Australia’s Exmouth Plateau, has been the subject of an extensive exploration drilling campaign with gas discovered in the Late Triassic Mungaroo Formation and the Cretaceous Lower Barrow Group. Characterisation of these reservoirs with 3D seismic data, well logs, core and biostratigraphic information has allowed insight and refinement to the previously established depositional models. The Mungaroo Formation comprises a thick succession (more than 2 km) of delta plain deposits characterised on 3D seismic by channel morphologies of differing sizes and orientations. Well penetrations in the channels reveal sand-bodies that can be classified as either single-storey or multistorey. Single-storey sand-bodies are thin (less than 15 metres), narrow in planform (less than one kilometer), lack evidence of lateral accretion and occasionally exhibit a funnel geometry. Multistorey channels are characterised by relatively thick, vertically and laterally amalgamated sand-bodies (more than 15 metres), in a broad channel morphology (more than one kilometer) bounded at its base by a composite surface of erosion. Single-storey channels have been interpreted as distributary channels and multistorey channels as incised valleys. In contrast, the Lower Barrow Group is a contemporaneous wave-dominated delta and slope-to-basin-floor sediment gravity flow system. The depositional environments formed progradational clinoform seismic stratigraphic units that filled accommodation generated during rifting. The delta is organised into arcuate to cuspate lobes that show changes in the shelf-slope trajectory with variations in accommodation and sediment supply. During falling trajectories of the shelf-slope break, the slope is demarcated by gullies forming a line of feeder systems that transport sediment from the delta shoreface into the deep-water. The sediment gravity flows formed coalescing fans that blanket the toe-of-slope and basin floor.

show abstract

Focussed Data Acquisition Strategy Aids Pluto and Xena Field Reservoir Characterisation

Conroy

Seggie

Clayton

et al. 2008

SPE Asia Pacific Oil and Gas Conference and Exhibition

View full text Add to dashboard Cite

The Pluto gas field, located 190 km northwest of Karratha, Australia, in 400 to 1000m water depth was discovered in April, 2005. A more recently discovered nearby satellite gas field, Xena, is located 10 km east of Pluto. The combined estimated dry gas recoverable volume of the Pluto and Xena fields is approximately 5 Tcf. The early implementation of a well integrated data acquisition strategy has been central to achieving development milestones. Integration of detailed core analysis with high quality wire line logs enabled reservoir understanding in a complex geological setting. The Pluto field was penetrated by one exploration and five appraisal wells and the Xena field by one exploration and two appraisal wells. The wells targeted the Triassic Mungaroo and Brigadier reservoirs which are fluvio-estuarine in nature with multi Darcy flow properties. The reservoirs are expected to behave as a well connected gas depletion system. The occasionally radioactive (high gamma ray), heterogeneous inter bedded nature of the Triassic reservoirs necessitated a multi faceted core-log interpretation. Good quality core data and photography coupled with high resolution density-neutron, resistivity image and nuclear magnetic resonance data allowed confident net to gross estimation. Data acquisition and interpretation was designed to address petrophysical, geological, reservoir engineering, Quantitative Interpretation (QI) geophysical and geomechanical uncertainties in the fields. This knowledge has been used in the construction of geomechanical analyses, static models and dynamic simulations. This paper demonstrates the benefits of an extensive integrated data acquisition and interpretation strategy to aid effective reservoir characterisation early in field life. This strategy assisted optimised development drilling targets, detailed well and completion designs and accelerated field development planning.

show abstract

Integrated Multi-Disciplinary Analysis of the Rankin Trend Gas Reservoirs North West Shelf, Australia

Cited by 4 publications

References 0 publications

Seismic Facies Mapping-Getting More Geology into Your Play.

Seismic Facies Mapping-Getting More Geology into Your Play.

Refining the Mungaroo Formation and Lower Barrow Group depositional models, Exmouth Plateau, North Carnarvon Basin: WA-390-P phase II exploration

Focussed Data Acquisition Strategy Aids Pluto and Xena Field Reservoir Characterisation

Contact Info

Product

Resources

About