Petrobras and Shell have brought online the Lula field’s seventh FPSO as the firms continue to ramp up production from the pre-salt Santos Basin. This paper presents the development of Sapinhoá field, covering the fast-track transition and decision-making process, from appraisal to conceptual and basic engineering of the Sapinhoá pilot project and on to its subsequent execution, highlighting the challenges, lessons learned, and results.
Petrobras and Shell have brought online the Lula field’s seventh FPSO as the firms continue to ramp up production from the pre-salt Santos Basin. The paper provides a fast-track approach to perform screening assessment of multiple subsea concepts. Since the first intelligent completion was installed 20 years ago, the systems have become increasingly complex in order to reach productivity and optimization goals, allowing real-time independent monitoring and management of each zone in the well. This paper describes an extended-well-test campaign using intelligent completions in a presalt reservoir. To understand reservoir behavior during production better, several options were analyzed for the first extended well test.
Petrobras and Shell have brought online the Lula field’s seventh FPSO as the firms continue to ramp up production from the pre-salt Santos Basin. The national oil company’s aim to lift oil and gas production and reserves over the next few years will rely on growth from big international projects, including those in Nigeria, Guyana, and the US.
Africa (Sub-Sahara) Eni Congo discovered oil at its Minsala Marine 1 well offshore the Republic of the Congo in Marine XII Block 12 km from the operator's recent Nené Marine discovery. Minsala intersected 420 m of gross pay and encountered light oil in a Lower Cretaceous presalt sequence. The well reached a total depth of 3700 m. Eni (65%) is operator, with state-owned partner SNPC 25%), and New Age (African Global Energy) Limited (10%). SOCO EPC's Lindongo X Marine 101 Well (LXM-101)--located offshore the Republic of Congo in Marine XI Block--encountered oil in a clastic sequence of the Djeno sands, with early log interpretation indicating approximately 50 m of gross pay.
Fu, Jin (CNPC Engineering Technology R&D Company Ltd.) | Wang, Xi (CNPC Engineering Technology R&D Company Ltd.) | Zhang, Shunyuan (CNPC Engineering Technology R&D Company Ltd.) | Chen, Chen (CNPC Engineering Technology R&D Company Ltd.)
Located in south of Eastern Venezuela Basin, Orinoco Oilfield is an onshore heavy oil field in South America. The heavy oil is known for its high content of acids, heavy metals and asphaltenes with a viscosity of 1000-10000mPa·s. According to the reserve report released by PDVSA by the end of 2016, JUNIN Block that is situated in east of Orinoco Oilfield has an OOIP of 178*108bbl.
Data of drilled wells and distances between offset horizontal intervals in Orinoco were both studied to improve ultimate production rates. 3-dimension borehole trajectories were designed and the most effective anti-collision measures were taken.
After optimziation 8-12 horizontal wells are distributed on one pad. As the horizontal interval extends, the stable production time is prolonged and the accumulative production per well improves. However, the recovery rate stops increasing when the horizontal interval is over 1600m in JUNIN Block. Economically a large space between offset horizontal intervals results in fewer wells and lower costs, but a smaller space contributes to a higher production efficiency per well. If the space exceeds 600m, the accumulative production rate increases much more slightly. A three-dimension well trajectory consists of a vertical interval, an angle building interval, an angle holding interval, an angle building & direction changing interval, a direction turning interval as well as an absolute horizontal interval.
Since Petrobras developed the first ever offshore deep reservoir (Lula) by scale in 2006, Brazil has been conducting a progressive campaign targeting hydrocarbons buried under deep water, which contributes to discovery of Lula, Carioca, Jupiter, Buzios, Libra and other giant presalt reservoirs in Santos Basin after Campos Basin, where there are 9 oil fields ranking among the top 20 offshore oil fields in terms of OOIP. By June 2017 over 160×104bbl oil and gas were produced per day in deep water of Santos Basin, taking up 57.1% of the total yield of Campos and Satos.
Creep deformation of ultra-thick salt beds, severe loss of limestones, poor drillability of formations and insufficiency of deep water drilling equipment all make drilling and completion challenges more complicated. Mud systems and casing programs are optimized to conquer creep of salt and formation of hydrates due to low downhole temperature. Turbines + impregnated bits are deployed to improve drilling efficiency of siliceous carbonates (Lagoa Feia A Group). Precise control of ECD and efficient LCMs solved engineering challenges caused by narrow density windows (Lagoa Feia B Group and Lagoa Feia C Group).
The previous Lula FPSO to start up, P-69, came in the Lula Extreme South area in October 2018. Petrobras, alongside partners Shell and Galp, has launched production from the seventh Lula field floating production, storage, and offloading (FPSO) vessel, bringing the consortium a step closer to reaching 1 million B/D of oil from the prolific Lula hub offshore Brazil. Hydrocarbons are flowing to the P-67 FPSO as part of the Lula North deepwater project in the pre-salt Santos Basin. The vessel, which has a capacity of 150,000 B/D of oil and 6 million cu m/day of natural gas, sits in 2130 m of water on the BM-S-11 concession 260 km off Rio de Janeiro state. P-67 will be connected to nine production wells and multiple injection wells.
The P-69 FPSO is a standardized production vessel with a capacity of 150,000 B/D of oil. Petrobras announced the launch of production from its operated P-69 floating production, storage, and offloading (FPSO) vessel at the Lula Field in Brazil’s presalt Santos Basin. The vessel, the eighth serving the field, is flowing oil and gas from the Lula Extremo Sul area, 290 km off Rio de Janeiro state in 2150 m of water. It will produce from eight wells and utilize seven injection wells, processing up to 150,000 B/D of oil and compressing up to 6 million m3/D of gas. Hull construction was completed at Cosco shipyard in China.
The Santos basin in Brazil suffers from strong internal multiples that overlap with primaries from the pre-salt reservoirs. We propose an adaptive double-focusing method for the removal of these multiples to obtain a correct image of the target area. The proposed method applies a form of source-receiver Marchenko redatuming to the reflection response. The Marchenko method is used to achieve single-focusing, after which we convolve the retrieved downgoing focusing function and the upgoing Green’s function to create double-focusing. This results in a base image that contains both primaries and internal multiples, and two models that predict the strongest internal multiples. Next, adaptive subtraction in the curvelet domain is used to remove these multiples from the base image. Some multiple interactions between the target area and the overburden remain, but we gain a robust method that is capable of dealing with a sparse acquisition geometry and imperfections in the (pre-processed) data. Also, this method is straightforward to implement and can be parallelized over pairs of focal points. These properties make adaptive double-focusing particularly suitable for the application to large volumes of field data. Tests on 2D field data and 3D field data show that the proposed method correctly predicts and removes the strongest internal multiples from the overburden, resulting in a clear improvement of the geological interpretability in the target area.
Maul, Alexandre (Petrobras) | Fonseca, Josué (Petrobras) | Teixeira, Leonardo (Petrobras) | Barros, Pablo (Petrobras) | Boechat, João (Petrobras) | Nunes, João Paulo (Petrobras) | Yamamoto, Thiago (Petrobras) | González, María (Emerson-Paradigm) | González, Gerardo (Emerson-Paradigm)
Meneguim, T., S. C. Mendes, A. Maul, L. Falcão, M. González, and G. González, 2015, Combining seismic facies analysis and well information to guide new interval velocity models for a pre-salt study, Santos Basin, Brazil (14th International Congress of the Brazilian Geophysical Society), Rio de Janeiro, RJ, Brazil, https://doi.org/10.1190/sbgf2015-271. Teixeira, L., F. Gobatto, A. Maul, N. Cruz, C. Gonçalves, and J. Laquini, 2017, Rock physics and seismic inversion to identify stratification within salt section supporting velocity, facies modeling and geomechanical analysis (15th International Congress of the Brazilian Geophysical Society), Rio de Janeiro, RJ, Brazil, https://doi.org/10.1190/sbgf2017-002.
The Santos basin is known to contain strong internal multiples that pose a major challenge for the imaging of pre-salt reservoirs. Artifacts generated by incorrectly imaged internal multiples can affect model building and interpretation, and ultimately contaminate amplitudes in the pre-salt reservoirs. We examine four different pre-salt fields from the Santos basin, present our prediction and subtraction strategy, and detail our observations and learnings for each one of the fields in the context of internal multiples.
Presentation Date: Monday, October 15, 2018
Start Time: 1:50:00 PM
Location: 211A (Anaheim Convention Center)
Presentation Type: Oral