One Tcf From One Well: The Design of a 500 MMscf/D Subsea Well for Offshore Mega Gas Fields
- Donald F. Reeves (Noble Energy) | John C. Healy (Noble Energy)
- Document ID
- Society of Petroleum Engineers
- SPE International Symposium and Exhibition on Formation Damage Control, 26-28 February, Lafayette, Louisiana, USA
- Publication Date
- Document Type
- Conference Paper
- 2014. Society of Petroleum Engineers
- 2.2.2 Perforating, 4.2.3 Materials and Corrosion, 2.1.7 Deepwater Completions Design, 2.4.6 Frac and Pack, 1.8 Formation Damage, 4.5 Offshore Facilities and Subsea Systems, 3 Production and Well Operations, 3.3.6 Integrated Modeling, 5.3.4 Integration of geomechanics in models, 2 Well Completion, 4.2 Pipelines, Flowlines and Risers, 1.6 Drilling Operations, 1.14 Casing and Cementing, 1.6.6 Directional Drilling, 1.1 Well Planning, 5.4.3 Gas Cycling, 5.5 Reservoir Simulation, 2.4.3 Sand/Solids Control, 2.4.5 Gravel pack design & evaluation, 4.6.2 Liquified Natural Gas (LNG), 5.2.1 Phase Behavior and PVT Measurements, 4.6 Natural Gas, 5.1.5 Geologic Modeling
- Open Hole Gravel Pack, Big Bore, OHGP, Ultra High Rate Gas Well
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Description of the Material
The paper will present a study to determine the feasibility of a subsea sand control gas well recovering one TCF in the offshore Israel Leviathan gas field. With an estimated 17 TCF of reserves spread across multiple fault blocks, reservoir simulation models for the Leviathan field show that gas recoveries exceeding one TCF are possible from a single well location. Considering the huge cost to install deep water subsea sand controlled wells, the ability to reduce the total well count necessary to deplete the field is a business imperative. This study to evaluate the potential to maximize recovery from a single well completion was comprised of three areas of focus:
1. The well completion design that can deliver ultra-high gas rates (500 MMscfd) to maximize production rate and accelerate recovery from a fault block.
2. The erosion, corrosion, and equipment considerations to recover one TCF from a well.
3. A worldwide study of 78 analogous gas fields and their actual or predicted performance. This study of analogue fields shows what volumes are being recovered in different regions and what future projects are planning to recover.
The results of this study will be incorporated into the full-field development planning for Leviathan and other subsea mega gas developments.
Results, Observations, and Conclusions
The results of the study show that completing a sand control well capable of producing 500 MMscfd and recovering one TCF is plausible. The details of the well productivity, completion design and relevant comparison to other analogue fields will be shown. In conclusion the production / completion team recommends to the project team that planning for such a well should be considered.
Significance of Subject Matter
With the continued discovery of large gas fields worldwide that have highly prolific sandstone reservoirs, the ability to design wells capable of recovering ultra-high volumes of gas will become of great interest. The project teams for these fields will be challenged to develop the fields with the smallest well count possible. The results from this study could prove useful to production and completion teams supporting large gas field developments.
|File Size||2 MB||Number of Pages||20|