Optimize a WAG Field Development Plan, Use Case of Carbonate Ultra-Deep Water Reservoir

Under the condition of the deep water reservoir area, the choice of bridge pier and long span continuous rigid frame beam construction methods are quite various. And the analysis of destruction of bridge depends mostly on the beam and piers. The paper cares mostly about these two parts.

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Optimization Applied to Buzios Flexible Riser Systems and Subsea Layout

10.4043/30972-ms ◽

2021 ◽

Author(s):

Vinicius Gasparetto ◽

Thierry Hernalsteens ◽

Joao Francisco Fleck Heck Britto ◽

Joab Flavio Araujo Leao ◽

Thiago Duarte Fonseca Dos Santos ◽

...

Keyword(s):

Deep Water ◽

Technology Use ◽

Capital Expenditure ◽

Lessons Learned ◽

Internal Diameter ◽

Flexible Riser ◽

Flexible Pipe ◽

Injection Wells ◽

Gas Field ◽

Field Development

Abstract Buzios is a super-giant ultra-deep-water pre-salt oil and gas field located in the Santos Basin off Brazil's Southeastern coast. There are four production systems already installed in the field. Designed to use flexible pipes to tie back the production and injection wells to the FPSOs (Floating Production Storage and Offloading), these systems have taken advantage from several lessons learned in the previous projects installed by Petrobras in Santos Basin pre-salt areas since 2010. This knowledge, combined with advances in flexible pipe technology, use of long-term contracts and early engagement with suppliers, made it possible to optimize the field development, minimizing the risks and reducing the capital expenditure (CAPEX) initially planned. This paper presents the first four Buzios subsea system developments, highlighting some of the technological achievements applied in the field, as the first wide application of 8" Internal Diameter (ID) flexible production pipes for ultra-deep water, leading to faster ramp-ups and higher production flowrates. It describes how the supply chain strategy provided flexibility to cover the remaining project uncertainties, and reports the optimizations carried out in flexible riser systems and subsea layouts. The flexible risers, usually installed in lazy wave configurations at such water depths, were optimized reducing the total buoyancy necessary. For water injection and service lines, the buoyancy modules were completely removed, and thus the lines were installed in a free-hanging configuration. Riser configuration optimizations promoted a drop of around 25% on total riser CAPEX and allowed the riser anchor position to be placed closer to the floating production unit, promoting opportunities for reducing the subsea tieback lengths. Standardization of pipe specifications and the riser configurations allowed the projects to exchange the lines, increasing flexibility and avoiding riser interference in a scenario with multiple suppliers. Furthermore, Buzios was the first ultra-deep-water project to install a flexible line, riser, and flowline, with fully Controlled Annulus Solution (CAS). This system, developed by TechnipFMC, allows pipe integrity management from the topside, which reduces subsea inspections. As an outcome of the technological improvements and the optimizations applied to the Buzios subsea system, a vast reduction in subsea CAPEX it was achieved, with a swift production ramp-up.

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Study on the Characteristics of Well Completion Technology in Deepwater Oil and Gas Field Development

International Journal of Power and Energy Engineering ◽

10.53469/ijpee.2021.03(08).12 ◽

2021 ◽

Vol 3 (8) ◽

pp. 70-72

Author(s):

Jianbo Hu ◽

◽

Yifeng Di ◽

Qisheng Tang ◽

Ren Wen ◽

...

Keyword(s):

Deep Water ◽

Deep Sea ◽

Oil And Gas ◽

Gas Field ◽

Marine Research ◽

Field Development ◽

Research Technology ◽

Well Completion ◽

Development Capacity ◽

Exploration And Development

In recent years, China has made certain achievements in shallow sea petroleum geological exploration and development, but the exploration of deep water areas is still in the initial stage, and the water depth in the South China Sea is generally 500 to 2000 meters, which is a deep water operation area. Although China has made some progress in the field of deep-water development of petroleum technology research, but compared with the international advanced countries in marine science and technology, there is a large gap, in the international competition is at a disadvantage, marine research technology and equipment is relatively backward, deep-sea resources exploration and development capacity is insufficient, high-end technology to foreign dependence. In order to better develop China's deep-sea oil and gas resources, it is necessary to strengthen the development of drilling and completion technology in the oil industry drilling engineering. This paper briefly describes the research overview, technical difficulties, design principles and main contents of the completion technology in deepwater drilling and completion engineering. It is expected to have some significance for the development of deepwater oil and gas fields in China.

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