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3D Reservoir Mapping While Drilling

Authors
Mauro Viandante (Schlumberger Australia) | Laura Pontarelli (Schlumberger Australia) | Fred Fernandes (Quadrant Energy Limited) | Shona MacDonald (Quadrant Energy Limited)
DOI
https://doi.org/10.2118/176109-MS
Document ID
SPE-176109-MS
Publisher
Society of Petroleum Engineers
Source
SPE/IATMI Asia Pacific Oil & Gas Conference and Exhibition, 20-22 October, Nusa Dua, Bali, Indonesia
Publication Date
2015
Document Type
Conference Paper
Language
English
ISBN
978-1-61399-390-3
Copyright
2015. Society of Petroleum Engineers
Disciplines
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
Keywords
Reservoir Mapping, GeoSteering, Seismic Interpretation, Multi Lateral, Real-Time
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Abstract

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 MBNumber of Pages   15

Beer, R., Claudio, L.Dias, T., Vieira da Cunha, A., et al. 2010. Geosteering and/or Reservoir Characterization: The Prowess of New-Generation LWD Tools. Paper 2010-93320 presented at SPWLA 51st annual Logging Symposium, Perth, Australia, 19-23 June.

Constable, M.V., Antonsen, F., Olsen, P.A., et al. 2012. Improving Well Placement and Reservoir Characterization with Deep Directional Resistivity Measurements. Paper SPE 159621 presented at the SPE Annual Technical Conference and Exhibition, San Antonio Texas, USA, 8-10 October

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.

Jenkins, S.Sims, A.Oldham, E., et al. 2012. De-risking a Horizontal Well through Application of New Deep Directional Resistivity Tool to Equate Seismic Data with Borehole Data. Paper SPE 158040 presented at the SPE Asia Pacific Oil and Gas Conference and Exhibition, Perth, 22-24 October.

Sankoff, R.D., Di Martino, G., MacDonald, S., et al. 2014. The Coniston and Novara Development in Western Australia – Offshore Challenges met with Solutions. Paper SPE 158040 presented at the SPE Asia Pacific Oil and Gas Conference and Exhibition, Adelaide, 14-16 October.

Viandante, M., Skinner, G., Pontarelli, L., et al. 2012. Adding a New Piece in the Puzzle Between Well Placement and Surface Seismic. Presented at the 2013 EAGE 2nd Workshop on Geosteering and Well Placement, Dubai, United Arab Emirates, 22-25 September

Seydoux, J., Legendre, E., Mirto, E., et al., 2014. Full 3D Deep Directional Resistivity Measurements Optimize Well Placement and Provide Reservoir-Scale Imaging While Drilling. Presented at the 2014 SPWLA 55th Annual Logging Symposium, Abu Dhabi, United Arab Emirates, 18-22 May

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