CO2 storage potential in major oil and gas reservoirs in the northern South China Sea

Abstract A riser is a key component for transporting produced oil and gas from the subsea wells to the surface production vessel. Through nearly 30 years of design and implementation, Steel Catenary Risers (SCRs) have been found to have the advantages of relatively low cost and good adaptability to floating platform’s motion. This paper investigates deepwater SCR system design for the Lingshui 17-2 (termed LS17-2) project. This paper first introduces a SCR system for the LS17-2 project. The field for this project is located in the northern South China Sea, with water depth of 1220m to 1560m. LS17-2 consists of a subsea production system, a deep-draft semi-submersible (SEMI), and an export riser/pipeline. The platform was designed to have a large storage capacity with a variable draft during its operation. Based on deepwater SCR engineering experience, the key SCR design challenges are summarized from the engineering executive perspective. The challenges to the SCR system design for the LS17-2 project include harsh environment condition in South China Sea and the impact on fatigue design for the requirement of 30-years’ service life. They call for design optimization and innovative ideas. The engineering design and analysis are discussed together solutions. To demonstrate the deepwater SCR system design for LS17-2 project, examples are provided to illustrate the challenges and solutions. The experience learned from this paper should have significant relevance to future SCR design.

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Characteristics of mud diapirs and mud volcanoes and their relationship to oil and gas migration and accumulation in a marginal basin of the northern South China Sea

Environmental Earth Sciences ◽

10.1007/s12665-016-5894-9 ◽

2016 ◽

Vol 75 (15) ◽

Cited By ~ 4

Author(s):

Jiaxiong He ◽

Shuhong Wang ◽

Wei Zhang ◽

Wen Yan ◽

Zhenquan Lu

Keyword(s):

South China Sea ◽

South China ◽

Oil And Gas ◽

Northern South China Sea ◽

Gas Migration ◽

Mud Volcanoes ◽

China Sea ◽

Marginal Basin

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Hydrocarbon detection based on Phase decomposition in Chaoshan Depression, northern South China Sea

Journal of Marine Science ◽

10.30564/jms.v3i2.3063 ◽

2021 ◽

Vol 3 (2) ◽

Author(s):

Guangjian Zhong ◽

Renqi Jiang ◽

Hai Yi ◽

Jincai Wu ◽

Changmao Feng ◽

...

Keyword(s):

South China Sea ◽

South China ◽

Oil And Gas ◽

Northern South China Sea ◽

Forward Modeling ◽

Hydrocarbon Accumulation ◽

Phase Decomposition ◽

Phase Component ◽

Hydrocarbon Detection ◽

China Sea

Located in northern South China Sea, Chaoshan Depression is mainly a residual Mesozoic depression, with a construction of Meso-Cenozoic strata over 7000m thick and good hydrocarbon accumulation conditions. Amplitude attribute of -90°phase component derived by phase decomposition is employed to detect Hydrocarbon in the zone of interest (ZOI) in Chaoshan Depression. And it is found that there are evident amplitude anomalies occurring around ZOI. Phase decomposition is applied to forward modeling results of the ZOI, and high amplitudes occur on the -90°phase component more or less when ZOI is charged with hydrocarbon, which shows that the amplitude abnormality in ZOI is probably caused by oil and gas accumulation.

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The Study on the Risk Analysis of Submarine Landslide in the Continental Slope Region of Northern South China Sea

Volume 7: Ocean Engineering ◽

10.1115/omae2016-54898 ◽

2016 ◽

Author(s):

Zhiduo Yan ◽

Weichen Ding ◽

Liang Pang

Keyword(s):

South China Sea ◽

Slope Stability ◽

Continental Slope ◽

South China ◽

Oil And Gas ◽

Northern South China Sea ◽

Submarine Landslide ◽

China Sea ◽

Submarine Slope ◽

Oil And Gas Resources

Abundant oil and gas resources are stored in the continental slope region of northern South China Sea. However, due to the submarine landslide disasters, submarine pipelines and cables and other submarine facilities were damaged, which seriously affected the development of oil and gas resources, leading to a huge economic losses. In order to ensure the safe operation of the submarine gas pipeline, it is necessary to carry out some researches in the submarine slope stability. In this paper, an uncertainty analysis method is applied and a distribution model which is suitable for slope stability influencing factors of this region is put forward. In addition, the risk of submarine slope is analyzed, plotting submarine landslide risk evaluation maps. Different stochastic characteristics of variables such as water depth, angle of slope, shear strength and earthquake acceleration etc can be reflected reasonably, which is helpful for the safety of oil and gas transportation.

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