Probabilistic Techno-Economic Appraisal of Prospective Hydrocarbon Resources in Five Turbidites, Offshore Uruguay
- Pablo Andres Rodriguez (ANCAP) | Santiago Ferro (ANCAP) | Ruud Weijermars (Texas A&M University)
- Document ID
- Offshore Technology Conference
- Offshore Technology Conference Brasil, 29-31 October, Rio de Janeiro, Brazil
- Publication Date
- Document Type
- Conference Paper
- 2019. Offshore Technology Conference
- Uruguay, Turbidites, Economic Evaluation, Probabilistic, Prospects
- 3 in the last 30 days
- 69 since 2007
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This paper presents a probabilistic techno-economic evaluation of several turbidite prospects recognized, through 3D seismic, in deep to ultra-deep water of the Punta del Este and Pelotas sedimentary basins, offshore of Uruguay. The production potential of many prospective turbidite reservoirs on the Atlantic margin has been recognized before, and new turbidite prospects were identified in Uruguay's maritime zone after analyzing data from the world's deepest water-depth well (Raya-X1) drilled in 2016.
The estimated ultimate recovery of oil and gas was determined, for each prospect, by carrying out probabilistic resource analyses (Monte Carlo simulations) using 3D seismic and key parameters from analog turbidite fields located in sedimentary basins along the Atlantic margin. Black oil fluid was assumed and the production concept involves FPSO vessels. The produced oil would be exported via tankers and the associated gas would be either sent to shore through a gas pipeline, or re-injected into the formation. For the economic evaluation, the latest fiscal terms of the applicable production-sharing contract, for offshore assets in Uruguay, were considered.
The outcomes of the probabilistic economic analyses include, for each prospect, several key performance indicators such as: net present value, internal rate of return, maximum negative cash flow, breakeven oil price, government take and entitlement percentage of hydrocarbons. These indicators were determined after running Monte Carlo simulations, which considered probability distribution functions for fixed and variable capital and operational expenditures, along with well productivities and decline rates. Regarding the economics of the project, several scenarios of incremental profit oil for the government and maximum association percentage for ANCAP, the National Oil Company of Uruguay, were evaluated. The cases considered show how key negotiables and variables, featuring in the tender process offered to oil companies interested in Uruguay's offshore hydrocarbon assets, may affect the economics and development solutions of a typical field development project. Considering a plausible base case of 20% ANCAP association and no incremental profit oil for the state, the results show that, for the biggest prospects, the breakeven oil price is situated near 60 USD/bbl. The analysis also shows that the smaller prospects would need to be developed as satellites of the nearby principal prospects in order to become attractive for development.
This study sheds light on the exploration potential of turbidites, offshore of Uruguay, and analyzed resource volumes, production profiles and economic returns of a hypothetic development in the case of a commercial discovery. The analyses provide useful templates for international oil companies, which, under the new and more flexible Uruguay Open Round licensing regime, may be interested in the exploration and imminent development of the Uruguayan offshore sedimentary basins.
|File Size||36 MB||Number of Pages||48|
Agrawal, P., Kumar, J. and Draoui, E. 2016. Lesson Learnt from Immiscible Gas Injection Pilot in Offshore Carbonate Reservoir. Presented at the Abu Dhabi International Petroleum Exhibition & Conference, Abu Dhabi, UAE, 7-10 November. SPE-183394-MS. https://doi.org/10.2118/183394-MS
ANCAP. 2018. Uruguay Round 3 Results, https://www.ancap.com.uy/innovaportal/v/5958/1/innova.front/uruguay-round-3-results.html (accessed 20 February 2019)
ANCAP. 2019a. REGIME FOR THE SELECTION OF OIL OPERATING COMPANIES FOR THE EXPLORATION AND EXPLOITATION OF HYDROCARBONS OF REPÚBLICA ORIENTAL DEL URUGUAY (OPEN URUGUAY ROUND), https://exploracionyproduccion.ancap.com.uy/innovaportal/file/7263/1/open-uruguay-round---terms-and-contract-model.pdf (accessed 11 June 2019).
Bacoccoli, G. & Toffoli, L.C. 1988. The Role Of Turbidites In Brazil's Offshore Exploration-A Review. Presented at the Offshore Technology Conference held in Houston, Texas, 2-5 May. OTC-5659-MS. https://doi.org/10.4043/5659-MS
Barcelos, A., Awad, S.P. and Assuncao, R.B. 1994. Deepwater Activities Offshore Brazil: Evolution on Drilling Technology. Presented at the University of Tulsa Centennial Petroleum Engineering Symposium, Tulsa, Oklahoma, 29-31 August. SPE-28004-MS. https://doi.org/10.2118/28004-MS
Botechia, V.E., Correia, M.G. and Schiozer, D.J. 2016. A Model-Based Production Strategy Selection Considering Polymer Flooding in Heavy Oil Field Development. Presented at the SPE Trinidad and Tobago Section Energy Resources Conference, Port of Spain, Trinidad and Tobago, 13–15 June. SPE-180838-MS. https://doi.org/10.2118/180838-MS
Bruhn, C.H.L., Gomes, J.A.T., Del Lucchese, C., . 2003. Campos Basin: Reservoir Characterization and Management - Historical Overview and Future Challenges. Presented at the Offshore Technology Conference, Houston, Texas, 5–8 May. OTC-15220-MS. https://doi.org/10.4043/15220-MS
Bruhn, C.H.L., Pinto, A.C.C., Johann, P.R.S., . 2017. Campos and Santos Basins: 40 Years of Reservoir Characterization and Management of Shallow- to Ultra-Deep Water, Post- and Pre-Salt Reservoirs - Historical Overview and Future Challenges. Presented at the Offshore Technology Conference, Rio de Janeiro, Brazil, 24-26 October. OTC-28159-MS. https://doi.org/10.4043/28159-MS
Conti, B., Perinotto, J.A.D.J., Veroslavsky, G.. 2017. Speculative petroleum systems of the southern Pelotas Basin, offshore Uruguay. Marine and Petroleum Geology 83: 1–25. http://dx.doi.org/10.1016/j.marpetgeo.2017.02.022
D' Huart, P.-E. 2018. Industry Limits Pushed on Cabiunas Gas Export Pipeline Project. Presented at the Offshore Technology Conference, Houston, Texas, 30 April-3 May. OTC-28940-MS. https://doi.org/10.4043/28940-MS
Dumas, G.E.S., Freire, E.B., Johann, P.R.S.. 2018. Reservoir Management of the Campos Basin Brown Fields. Presented at the Offshore Technology Conference, Houston, Texas, 30 April-3 May. OTC-28657-MS. https://doi.org/10.4043/28657-MS
Ehrenberg, S.N. and Nadeau, P.H. 2005. Sandstone vs. carbonate petroleum reservoirs: A global perspective on porosity-depth and porosity-permeability relationships. AAPG Bulletin 89 (4): 435–445. http://dx.doi.org/10.1306/11230404071
EIA (Energy Information Administration). 2019. Annual Energy Outlook 2019 with projections to 2050, https://www.eia.gov/outlooks/aeo/pdf/aeo2019.pdf (accessed 01 February 2019)
Etuhoko, M.O., and Lewis, P. 2004. Monobore Completion Using Interventionless Technology in Offshore Horizontal Gas-Injection Wells. Presented at the SPE Annual Technical Conference and Exhibition, Houston, Texas, 26-29 September. SPE-90760-MS. http://dx.doi.org/10.2118/90760-MS
Ferro, F., Tomasini, J., Gristo, P.. 2017. Uruguayan Petroleum Fiscal Regime. Presented at SPE Latin America and Caribbean Petroleum Engineering Conference, Buenos Aires, Argentina, 17-19 May. SPE-185473-MS. https://doi.org/10.2118/185473-MS
Gasoducto Cruz del Sur. 2019. Gasoducto – Trazado. http://www.gasoductocruzdelsur.com.uy/gas_trazados.php (accessed 28 February 2019).
Graton, L.C. and Fraser, H.J. 1935. Systematic Packing of Spheres-with Particular Relation To Porosity And Permeability. The Journal of Geology 43 (8): 785–909. https://doi.org/10.1086/624386
Hauge, J. and Horn, T. 2005. The Challenge Of Operating And Maintaining 115 Subsea Wells On The Troll Field. Presented at the Offshore Technology Conference, Houston, Texas, 2-5 May. OTC-17111-MS. http://dx.doi.org/10.4043/17111-MS
IHS. 2019. Petrodata Offshore Rig Day Rate Trends, https://ihsmarkit.com/products/oil-gas-drilling-rigs-offshore-day-rates.html (accessed 11 February 2019).
INE. 2011. Resultados del Censo de Población 2011: población, crecimiento y estructura por sexo y edad, http://www.ine.gub.uy/c/document_library/get_file?uuid=12d80f63-afe4-4b2c-bf5b-bff6666c0c80&groupId=10181 (accessed 10 February 2019).
Johnston, D. 2008. Changing fiscal landscape. The Journal of World Energy Law & Business 1 (1): 31–54. https://doi.org/10.1093/jwelb/jwn006
Levitan, L.L. and Murtha, M. 1999. New correlations estimate Pb, FVF. Oil and Gas Journal 97 (10): 70–76. https://www.ogj.com/articles/print/volume-97/issue-10/in-this-issue/production/new-correlations-estimate-p-b-fvf.html
Liner, D. 2016. The Limitations of Lognormal Distributions: Using Subsurface Data to Make More Accurate Resource Estimations. AAPG Search and Discovery. Search and Discovery Article #41848 (2016). http://www.searchanddiscovery.com/documents/2016/41848liner/ndx_liner.pdf
Martins, A.L., Aragao, A.F.L., Aranha, P.E.. 2011. Well Construction Hydraulics in Challenging Environments. Presented at the SPE/IADC Drilling Conference and Exhibition, Amsterdam, Netherlands, 1-3 March. SPE-140145-MS. http://dx.doi.org/10.2118/140145-MS
Medgaz. 2019. Technical Summary, https://www.medgaz.com/medgaz/pages/datos_significativos-eng.htm (accessed 19 February 2019).
Morales, E. 2013. Evolução tectônica e estratigráfica das bacias da margem continental do Uruguai. PHD Thesis, Universidade Estadual Paulista, Rio Claro, Sao Paulo (September 2013). http://hdl.handle.net/11449/138385
Morales, E., Chang, H.K., Soto, M.. 2017a. Tectonic and stratigraphic evolution of the Punta del Este and Pelotas basins (offshore Uruguay). Petroleum Geoscience 23 (4): 415–426. https://doi.org/10.1144/petgeo2016-059
Morales, E., Chang, H.K., Soto, M.. 2017b. Speculative petroleum systems of the Punta del Este Basin (Offshore Uruguay). Brazilian Journal of Geology 47 (4): 645–656. http://dx.doi.org/10.1590/2317-4889201720170078
Motta, B.R., Alves, S.J., and Reis, L.C. 2005. Optimizing The Barracuda And Caratinga Subsea Well Design To Improve The Oil Production Curve. Presented at the Offshore Technology Conference, Houston Texas, 2-5 May. OTC-17051-MS. https://doi.org/10.4043/17051-MS
Nascimento, J.H. and Schiozer, D.J. 2017. Decision Risk Analysis to Evaluate Uncertainty on the Percentage of Sharing Between Oil Companies and Government at Brazilian Production Sharing Contracts. Presented at the SPE Europec featured at 79th EAGE Conference and Exhibition, Paris, France, 12-15. SPE-185829-MS. https://doi.org/10.2118/185829-MS
Nunes, G.C., Figueiredo, L., Melo, M., . 2011. PETROBRAS Experience on Water Management for Brown Fields. Presented at the Offshore Technology Conference, Houston, Texas, 2-5 May. OTC-21384-MS. https://doi.org/10.4043/21384-MS
Olea, R.A. 2011. On the Use of the Beta Distribution in Probabilistic Resource Assessments. Natural Resources Research 20 (4): 377–388. http://dx.doi.org/10.1007/s11053-011-9153-1
PAC. 2018a. GASODUTO PRÉ-SAL / CABIUNAS (ROTA 2) – RJ, http://www.pac.gov.br/obra/8854 (accessed 19 February 2019).
PAC. 2018b. GASODUTO PRÉ-SAL / COMPERJ (ROTA 3) – RJ, http://www.pac.gov.br/obra/15414 (accessed 19 February 2019).
Rystad Energy. 2015. What it costs to produce oil. https://money.cnn.com/interactive/economy/the-cost-to-produce-a-barrel-of-oil/index.html?iid=EL (accessed 14 January 2019).
Schmoker, J.W and Gautier, D.L. 1988. Sandstone porosity as a function of thermal maturity. Geology 16 (11): 1007–1010. https://doi.org/10.1130/0091-7613(1988)016%3C1007:SPAAFO%3E2.3.CO;2
Silva, M.F., Malta, M.S., Zapparolli, L.. 2007. SPE 107062 Integrated Management on a Mature Field in the Brazilian Continental Margin. Presented at the Latin American & Caribbean Petroleum Engineering Conference, Buenos Aires, Argentina, 15-18 April. SPE-107062-MS. http://dx.doi.org/10.2118/107062-MS
Small, L., Okonta, V., Florez, G.. 2015. Offshore Well Intervention Conference Report, http://interventioneu.offsnetevents.com/uploads/2/4/3/8/24384857/on_rob_gordon_owi_eu15_report2_v1x.pdf
Soto, M., Conti, B., Gristo, P.. 2016. Direct Oil and Gas Evidences from Punta Del Este Basin, Offshore Uruguay: New Data From Fluid Inclusions. AAPG Search and Discovery. Search and Discovery Article #10833 (2016). http://www.searchanddiscovery.com/documents/2016/10833conti/ndx_conti.pdf
Souza, A.L.S., Figueiredo, M.W., Kuchpil, C.. 2005. Water Management In Petrobras: Developments And Challenges. Presented at the Offshore Technology Conference, Houston, Texas, 5-8 May. OTC-15220-MS. https://doi.org/10.4043/15220-MS
Wheaton, S.R. and Manu, T. 2012. Jubilee Field Development, Ghana - In-Country Activities & Their Impact. Presented at the Offshore Technology Conference, Houston, Texas, 30 April-3 May. OTC-23428-MS. https://doi.org/10.4043/23428-MS
Wikipedia. 2019. Cruz del Sur pipeline (15 February 2019 revision), https://en.wikipedia.org/wiki/Cruz_del_Sur_pipeline (accessed 22 February 2019).
Ycharts. 2019. UK Heren NBP Index Natural Gas Prices, https://ycharts.com/indicators/uk_heren_nbp_index_natural_gas_prices (accessed 12 February 2019).