The Application of Extreme Value Calculation Model Based on Deductive Method in South China Sea

2018 ◽  
Author(s):  
Xie Botao ◽  
Ren Xuhe ◽  
Li Jiagang ◽  
Huang Bigui
Keyword(s):  
South China Sea ◽  
South China ◽  
Return Period ◽  
Oil And Gas ◽  
Calculation Model ◽  
Cost Evaluation ◽  
Design Parameters ◽  
China Sea ◽  
Deductive Method ◽  
North Part

The marine environmental conditions of typhoon affected area in South China Sea (SCS) in China are complicated. The parameters of wind, wave and current speed of different return period are the basis of the selection of oilfield project and the important role of development cost evaluation. Based on the deduction method of API specification, the design criteria of the typhoon in SCS oil and gas regions with the two-layer nested model combined with typhoon numerical model is proposed in this paper. The statistical analysis of typhoon characteristics were presented, then wind speed of all the blocks in north part of SCS induced by typhoon with long return period was calculated. The prediction accuracy of the design parameters of long return period is improved by this model.

Deepwater Steel Catenary Riser System Design for Lingshui 17-2 Project

2021 ◽  
Author(s):  
Ning He ◽  
Hu Yang ◽  
Fanli Xu ◽  
Yongming Cheng
Keyword(s):  
South China Sea ◽  
System Design ◽  
South China ◽  
Oil And Gas ◽  
Low Cost ◽  
Northern South China Sea ◽  
Steel Catenary Riser ◽  
China Sea ◽  
Scr System ◽  
The Impact

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.

Fundamental Engineering Characteristics of Cohesive Sediments in the Northern Region of South China Sea

2019 ◽  
Author(s):  
Shuzhao Li ◽  
Xu Jia ◽  
Zhigang Li ◽  
Jiagang Li
Keyword(s):  
South China Sea ◽  
Shallow Water ◽  
South China ◽  
Deep Water ◽  
Oil And Gas ◽  
Cohesive Soil ◽  
Northern Region ◽  
China Sea ◽  
Engineering Characteristics ◽  
Offshore Oil And Gas

Abstract The northern region of South China Sea is the important strategic region for the offshore oil and gas resources development in China. The main shallow sediment of the region is the cohesive soil with diverse engineering characteristics difficult to be determined. The paper collects the comprehensive geotechnical data obtained from the laboratory test and the in-situ Cone Penetration Test (CPT) for the offshore oil and gas projects in the northern region of South China Sea, and presents the fundamental engineering characteristics of the cohesive soil. Results indicate that the cohesive soil with the low plasticity index and the low clay particle content in shallow water is obviously different from that in deep water in the northern region of South China Sea. The physical properties of the clay soil with the high plasticity index and high clay particle content in the northern deep water region of South China Sea are similar to those found in the Gulf of Mexico and West Africa. Moreover, there are two different deposit modes for the sediment in the northern region of South China Sea, which are the fine-grained and coarse-grained govern deposit modes in deep and shallow water respectively. It is found that the sleeve friction ratio of the cohesive sediment is very low in shallow water. The normalized values of the clay soil in deep water are consistent with those from the Gulf of Mexico and West Africa.

scholarly journals Analysis of sea condition of Jiaolong deep-sea manned submersible operating in the South China Sea

2021 ◽  
Vol 276 ◽  
pp. 01022
Author(s):  
Liu Xiaohui ◽  
Qin Shengjie ◽  
Yang Lei ◽  
Qi Haibin ◽  
Zhang Qi
Keyword(s):  
South China Sea ◽  
South China ◽  
Deep Sea ◽  
Operating Time ◽  
Scientific Investigation ◽  
The South China Sea ◽  
Design Parameters ◽  
The South ◽  
China Sea ◽  
Manned Submersible

The South China Sea is the sea area with the largest area, the largest depth, the most abundant oil and gas resources and the most comprehensive biological species in China. The further exploration of the South China Sea with manned submersible and other major deep-sea equipment is of great significance to China's deep-sea scientific investigation. In this paper, Jiaolong manned submersible was taken as an example. In order to explore the operation window to guarantee the operation safety of manned submersible and improve the efficiency of voyage scientific investigation, this paper combined the global wave return data and the wave data based on satellite remote sensing to focus on the Marine environment characteristics in the South China Sea. According to the operational design parameters of Jiaolong, in the South China Sea, the most appropriate operating time window is from April to September, and the rest of the time, proper sea conditions should be selected for the operation.

scholarly journals The Disputes of South China Sea From International Law Perspective

2017 ◽  
Vol 1 (1) ◽  
pp. 1
Author(s):  
Surya Wiranto ◽  
Hikmahanto Juwana ◽  
Sobar Sutisna ◽  
Kresno Buntoro
Keyword(s):  
Conflict Resolution ◽  
South China Sea ◽  
International Law ◽  
South China ◽  
Dispute Settlement ◽  
Oil And Gas ◽  
Applied Theory ◽  
Territorial Dispute ◽  
China Sea ◽  
Theory Of Law

<p align="justify">Disputes in the South China Sea (SCS) occur due to the seizure of mari- time regions of Spratly and Paracel islands, the regions which are rich in natural resources of oil and gas. Indonesia is not a claimant state to the features in SCS, but Indonesia has a vital national interest to the jurisdiction of waters of the exclusive economic zone (EEZ) and the continental shelf which overlaps with claims 9 dashed lines of PRC. In analyzing and resolving these disputes, the writer uses theory of law- based state as a grand theory, the theory of international law as a middle range theory, and theory of conflict resolution as an applied theory. The method is a normative legal research. The legal materials are collected based on the identifted list of problems/issues and are assessed according to the classiftcation of the problems. The legal materials are deductively managed to draw conclusions from the problems encountered, and are further analyzed to solve these problems. Conflict resolution to maritime territorial dispute can be achieved by legal means. The dispute settlement by legal means can be done through bilateral, multilateral, arbitration, to the International Court of Justice, while the dispute resolution through CBMs can be achieved through dialogue in international fora by applying the formula 6 + 4 + 2 or 6 + 4 + 1 + 1, and by conducting survey and research cooperation in the fteld of maritime.</p>

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