Starting Up the Most Powerful ESP Installed into Deepwater Offshore Wells Completed with Open Hole Gravel Packing: A Real Challenge

Pedroso, Carlos Alberto; Cavalcante, Barbara Ferreira; Marsili, Marcelo Danemberg; Santos, Marcelo Paulino; Rocha, Paulo Roberto Ribeiro

doi:10.2118/194407-ms

Cited by 5 publications

(1 citation statement)

References 12 publications

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“…[3] This time window where no intervention is necessary is called the no-touch time, which has to be carefully estimated. [1,4,5] However, the evaluation of the no-touch time requires knowledge of the transient behaviour of the temperature field in the production fluids in the whole line, which cool down by natural convection, which depends on the fluid properties and pipeline thermal insulation. [6,7] There are some mature technologies in the industry for flow assurance, such as thermal insulation, direct electric heating, injection of chemical inhibitors, and the displacement of the production fluids by dead or diesel oil.…”

Section: Introductionmentioning

confidence: 99%

Simulating the displacement of a heavy oil by a lighter oil in an offshore production line

Favero,

da Cunha Lage,

da Silva Francisco

et al. 2023

Can J Chem Eng

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An analysis was conducted on the displacement of a heavy fluid by a miscible light fluid in the flow assurance operation of injecting diesel oil to displace heavy oil in an insulated offshore production line. A three‐dimensional computational fluid dynamics model was developed and implemented in OpenFOAM®. It stimulates the production stages, no‐touch time, and oil displacement, considering heat transfer through natural convection and conjugated heat transfer through the solid layers of the pipeline. The specific test case focused on the first 180 m of an existing offshore production line. The simulations revealed two primary mechanisms of mixing: turbulence and secondary flows generated by the pipeline curves. Remarkably, the results demonstrate that by injecting a volume of lighter oil 1.3 times the pipeline volume, approximately 90%–95% of the heavy oil can be effectively removed.

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Section: Introductionmentioning

confidence: 99%

Simulating the displacement of a heavy oil by a lighter oil in an offshore production line

Favero,

da Cunha Lage,

da Silva Francisco

et al. 2023

Can J Chem Eng

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Subsea Systems Innovations and the Use of State of Art Subsea Technologies Help the Flow Assurance of Heavy Oil Production in Ultra-Deep Waters

Pedroso¹,

Rosa²,

Borges³

et al. 2020

SPE Latin American and Caribbean Petroleum Engineering Conference

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Flow assurance in ultra-deep waters oil production is always a major concern. Atlanta field, which produces heavy oil in ultra-deep waters, is one of the most challenging project offshore combining several difficulties: hydrates formation, emulsion tendency, scale formation, foaming, high viscosities that can achieve 100.000 cp at sea bed temperatures, etc. To overcome these challenges, the best subsea system technologies has been used, together with some small, but ingenuous, innovations. The use of a 6" unbonded flexible lines, with TEC 2 insulation layers minimize the risk high viscosities in case of the expected shut downs. To cope with scales, foaming and emulsion, chemical additives can be deployed into the wells through the biggest and unique umbilical installed in Brazil, which accommodates 15 hoses, 2 MV Electrical Cables of 3X150mm2 and 2 Eletrical Cables with 4x6mm2 and 2 eletrical cable of 4x2,5mm2. Hydrates can block the flowlines stopping the production. When it occurs, the remediation is normally long and expensive. For hydrates, the cliché "prevention is better than remediation" is true. Hydrates can be prevented with proper procedures and preventers. But in case of hydrate formation, a pioneer hydrate mitigation panel, operated by ROV was installed in the wet christmas tree (deployed by cables). And finally, to guarantee the production flexibility for production and maintenance, an innovative and unique subsea lay out, consisting of two Electrical Submersible Pump (ESP), one in-well and other in mud line skid, was developed and installed. All this innovations and best technologies used together made Atlanta a successful case of heavy oil production in ultra-deep waters, triggering huge resources around the world.

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First Open Hole Gravel Pack with AICD in Ultra Deep Water

Pedroso¹,

Latini

Araujo

et al. 2020

SPE International Conference and Exhibition on Formation Damage Control

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The execution of Open Hole Horizontal Gravel Packs (OHHGP) in ultra-deep waters (greater than 1500m) demands the use of the best technologies available. For the Atlanta Project, a detailed description of the first two wells successfully completed with OHHGP in the field, was provided in previous papers (OTC-25813, SPE-174893, SPE-174896). The third Atlanta well faced a new challenge: the integration of AICD technology (Autonomous Inflow Control Device) in the gravel pack screens. Due to the restriction imposed to the flow through the screens by the AICDs, the resulting pumping pressure and associated ECD (Equivalent Circulating Density) is increased, further reducing the already narrow operational window, which is common for reservoirs in such water depths. The use of AICD technology, which imposes an additional pressure drop to the aqueous fluid flow, further increases the pumping pressure, making conventional gravel packing strategies and procedures unfeasible. To overcome these new challenges, dozens of simulations were performed to address the new challenge and an innovative screen configuration was adopted to facilitate effective gravel pack placement while retaining the necessary fluid flow restriction of the AICD operating as per the simulation design during well production. Additionally, to ensure effective and complete gravel pack efficiency, a new pumping procedure, incorporating the use of three different proppant strategies, was implemented. By introducing these innovations, the third Atlanta well was 100% packed and the expected PI was obtained. Long-term performance, with the aid of tracers installed in the screens, is being evaluated. This paper will detail all the planning and execution phases that enabled completion of the first open hole gravel pack with AWES RP T2 AICDs in ultra-deep waters. Also in this paper, the production evaluation data is analyzed.

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Starting Up the Most Powerful ESP Installed into Deepwater Offshore Wells Completed with Open Hole Gravel Packing: A Real Challenge

Cited by 5 publications

References 12 publications

Simulating the displacement of a heavy oil by a lighter oil in an offshore production line

Simulating the displacement of a heavy oil by a lighter oil in an offshore production line

Subsea Systems Innovations and the Use of State of Art Subsea Technologies Help the Flow Assurance of Heavy Oil Production in Ultra-Deep Waters

First Open Hole Gravel Pack with AICD in Ultra Deep Water

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