3D Reservoir Mapping While Drilling
- Mauro Viandante (Schlumberger Australia) | Laura Pontarelli (Schlumberger Australia) | Fred Fernandes (Quadrant Energy Limited) | Shona MacDonald (Quadrant Energy Limited)
- Document ID
- Society of Petroleum Engineers
- SPE/IATMI Asia Pacific Oil & Gas Conference and Exhibition, 20-22 October, Nusa Dua, Bali, Indonesia
- Publication Date
- Document Type
- Conference Paper
- 2015. Society of Petroleum Engineers
- 5.1 Reservoir Characterisation, 1.12.2 Logging While Drilling, 1.12 Drilling Measurement, Data Acquisition and Automation, 2.2 Completion Installation and Operations, 1.6 Drilling Operations, 5.1.8 Seismic Modelling, 5 Reservoir Desciption & Dynamics, 2 Well completion, 1.6.7 Geosteering / Reservoir Navigation, 5.1.2 Faults and Fracture Characterisation, 2.4.3 Sand/Solids Control
- Reservoir Mapping, GeoSteering, Seismic Interpretation, Multi Lateral, Real-Time
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- 337 since 2007
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A development campaign offshore Australia, with a total of 15 laterals in a challenging geological environment, has been successfully completed by Quadrant Energy. The main objectives were to geosteer and place the well path at an optimum standoff from the oil/water contact (OWC), while drilling at the interface of the gas/oil contact (GOC), when present, and at 1-1.5m TVD from the reservoir top when not.
The field is characterized by a series of transverse and longitudinal seismic and sub-seismic faults that bisect hydrocarbon-bearing sands which represent the greatest challenges in this development campaign. Evidence from exploration wells showed a thin column of heavy oil and a gas cap in the fault-bonded reservoir. A new multi-disciplinary methodology not only enabled Quadrant Energy to achieve its development objectives, but to develop a full subsurface picture of the Coniston field reservoir.
The use of the Reservoir Mapping-While-Drilling (RMWD) combined with Bed Boundary Mapping Tool (BBMT) and Multi-Function LWD services enabled the laterals to be placed at 1-2m TVD below the reservoir top or gas cap, when present, even in highly faulted sections. In addition to this precise placement the extreme depth of investigation of the RMWD service, in conjunction with the real-time multilayer inversion capability, constantly mapped the OWC at a distance up to 19m TVD below the wellbore. While drilling, different qualities of reservoir sands were identified and enabled the extensions of the wells’ TDs based on reservoir properties. The distance to boundary information, provided in real-time by the RMWD service, was used in real-time by the Quadrant Energy geology and geophysics team to update and validate the seismic model that provided increased confidence in the reservoir model and a more precise planning for future development wells.
This paper will illustrate the use of the latest LWD RMWD technology in a challenging geological environment. The paper will explore the close collaboration, teamwork, and integration necessary to drive innovation and demonstrate the outcomes of this successful campaign which have not only exceeded the development goals, but have also generated a full 3D view of the reservoir.
|File Size||6 MB||Number of Pages||15|
Dupuis, C., Omeragic, D., Chen, Y-H., and Habashy, T. 2013. Workflow to Image Unconformities with Deep Electromagnetic LWD Measurements Enable Well Placement in Complex Scenarios. Paper SPE 166117 presented at the SPE Annual Technical Conference and Exhibition, New Orleans, Louisiana, USA, 30 September-2 October.