Subsea Solutions to Anticipate the First Oil Production

Freitas, Gustavo Adolfo Cavalcanti; Lins, Felipe Mendes; Solano, Rafael Familiar; Azevedo, Fabio B. de; Smolka, Rodrigo Bustamante; Gasparetto, Vinicius

doi:10.4043/31742-ms

Day 2 Tue, May 03, 2022 2022

DOI: 10.4043/31742-ms

|View full text |Cite

Subsea Solutions to Anticipate the First Oil Production

Gustavo Adolfo Cavalcanti Freitas

Felipe Mendes Lins

Rafael Familiar Solano

et al.

Abstract: Brazilian pre-salt production development brought up a series of technological challenges to Petrobras over the last two decades. Despite all the innovations that have made feasible to produce oil in ultra-deep water, the deployment schedule of these projects still showed opportunities for improvement, according to other companies’ benchmark. Given the economical attractiveness of reducing the production schedule of greenfield development and the current increase of Petrobras production output subject to the t… Show more

Help me understand this report

Search citation statements

Order By: Relevance

Paper Sections

Select...

Citation Types

Supporting

Mentioning

Contrasting

Year Published

2023

2024

Publication Types

Select...

Other4

Relationship

Self Cite0

Independent4

Authors

Journals

Cited by 4 publications

References 2 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

Comparing WAG-CO2 Injection with Continuous Water and Gas Injection in Separate Wells for the Development and Management of a CO2-Rich Light Oil Fractured Carbonate Reservoir Subject to Full Gas Recycling

Oliveira

Santos

et al. 2023

SPE EuropEC - Europe Energy Conference Featured at the 84th EAGE Annual Conference &Amp; Exhibition

View full text Add to dashboard Cite

Many projects in the Brazilian pre-salt assume the use of water alternating gas (WAG-CO2) injection as an ecologically safe carbon storage strategy, with improved hydrocarbon recovery. However, studies that compare these advantages with a simpler management plan are not common. The objective of this work is to compare WAG-CO2 injection with continuous injection of water and gas (CIWG) rich in CO2 in separate wells for the development and management of a light-oil fractured carbonate reservoir subject to full gas recycling. We employed the UNISIM-II benchmark model, a naturally fractured carbonate reservoir with Brazilian pre-salt characteristics, which enables an application in controlled environment where the reference response is known (UNISIM-II-R). We used a model-based decision analysis for production strategy selection, hierarchical optimization of the decision variables and algorithms to maximize the objective function. Representative models (RM) are selected from the ensemble of models and used to incorporate the effects of geological, reservoir, and operational uncertainties into the optimization process. The net present value is the objective function during the nominal optimization of candidate strategies of each RM and the expected monetary value and risk analysis are considered to select the final production strategy considering uncertainties. The risk analysis was quantified based on downside risk and upside potential relation to a benchmark return. We optimized two alternative development plans (one considering WAG-CO2 injection and the other continuous injection of water and gas in separate wells) and compared their performance indicators and decision variables, including design variables (number, type and placement of well, and size of production facilities) and life-cycle control rules (management of equipment over time). We then applied a cross-simulation, where the best strategy optimized for one recovery method was applied to the other and the injection strategy was optimized again. We were therefore able to assess the need to pre-define the recovery method before defining design variables to validate the flexibility of each strategy for possible future changes in the recovery mechanism. Finally, we repeated the study for different reservoir scenarios to compare the alternatives considering typical uncertainties of the Brazilian pre-salt and validated the final strategies in the reference model to quantify the real value in decision making. The strategies reached a full gas recycling in both recovery methods and allowed a comparison of their advantages and disadvantages. The operations of WAG-CO2 injection can be more complex and the equipment more expensive. The novelty of this work is the consideration of continuous injection of water and gas in separate wells as a simpler alternative to the development and management of pre-salt oil fields, since this method may also meet operators’ and environmental demands, bearing simpler operating challenges and promoting good recovery and profitability.

show abstract

Comparing WAG-CO2 Injection with Continuous Water and Gas Injection in Separate Wells for the Development and Management of a CO2-Rich Light Oil Fractured Carbonate Reservoir Subject to Full Gas Recycling

Oliveira

Santos

et al. 2023

SPE EuropEC - Europe Energy Conference Featured at the 84th EAGE Annual Conference &Amp; Exhibition

View full text Add to dashboard Cite

show abstract

Overcoming Challenges in the Development of Standardized Steel Riser Designs

Alves

Bordin

Senra

et al. 2023

Day 1 Mon, May 01, 2023

View full text Add to dashboard Cite

The demand for subsea projects adopting steel risers in Petrobras have increased in the last years. In parallel, new frontiers in ultra-deep waters offshore Brazil are emerging, beyond the pre-salt of Santos Basin, bringing new challenges to the conception of subsea systems and riser designs. This paper aims to present relevant solutions and new strategies that have been used by Petrobras in the development of standardized SLWR (Steel Lazy Wave Riser) designs that endure the entire production life of typical subsea projects.

show abstract

Diverless Support Systems for an Improved Rigid/Flexible Risers Competitivity on Pre-Salt Fields

Reis,

Brito,

Ferreira

et al. 2024

Day 3 Wed, May 08, 2024

View full text Add to dashboard Cite

Riser pull-in is a time-consuming activity. It is required to start the Floating Unit Production (FPU) and its ramp-up. In additional, conventional systems are dedicated to install rigid riser or flexible riser in the Floating Production Storage and Offloading (FPSO). This article presents the challenges overcome and ongoing on developing the riser & hull interface system for the pre-salt fields to speed up the riser connection and to provide flexibility for the riser technology a posteriori of the design system. This work details the functionality, design, manufacturing, and pull-in activities of two different systems developed for pre-salt fields: (i) the Diverless Bellmouth with hydraulic actuators (BSDL-SI), intended for flexible riser or umbilical; (ii) and the Unified Diverless Support Tube (TSUDL), a device with the capability to support either flexible or rigid risers, with reduced dependance on shallow diving operations, allowing a broader competitivity on the riser technology solution and therefore more possibilities for the subsea layout design. Improving a diver-assisted equipment to a diverless design significantly increases its complexity by means of enhanced mechanisms, hydraulic actuation, and monitoring systems. The authors present, for both systems BSDL-SI and TSUDL, the challenges overcome for the different project phases: design, manufacturing, and pull-in activities. It is presented pull-in activities comparison between the developed and standard support riser & hull interface systems to illustrate the efficiency improvement in the operations with using of those new technologies. They enable to anticipate the production and to reduce the overall project cost and greenhouses gases emissions. Moreover, the diving assisted activity is one of the riskiest to the professional in the oil and gas industry. Therefore, by eliminating these activities it will make the project of oil and gas industry safer. These new concepts of diverless riser supports are disruptive on the offshore industry, as they consider control & monitoring by the FPU, although using field proven components. Considering this strategy, a new approach to the market is being used to reduce the implementation and schedule risks, such as an early engagement during the design phase with the suppliers, leading to a new concept of technology licensing and pre-qualification that will be presented on this paper.

show abstract

scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.

Contact Info

customersupport@researchsolutions.com

10624 S. Eastern Ave., Ste. A-614

Henderson, NV 89052, USA

This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.

Blog Terms and Conditions API Terms Privacy Policy Contact Cookie Preferences Do Not Sell or Share My Personal Information

Made with 💙 for researchers

Part of the Research Solutions Family.

Subsea Solutions to Anticipate the First Oil Production

Cited by 4 publications

References 2 publications

Comparing WAG-CO2 Injection with Continuous Water and Gas Injection in Separate Wells for the Development and Management of a CO2-Rich Light Oil Fractured Carbonate Reservoir Subject to Full Gas Recycling

Comparing WAG-CO2 Injection with Continuous Water and Gas Injection in Separate Wells for the Development and Management of a CO2-Rich Light Oil Fractured Carbonate Reservoir Subject to Full Gas Recycling

Overcoming Challenges in the Development of Standardized Steel Riser Designs

Diverless Support Systems for an Improved Rigid/Flexible Risers Competitivity on Pre-Salt Fields

Contact Info

Product

Resources

About