There have been nearly 33 oil and gas fields with billions bbl resources found in deepwater areas all over the world since 1970,so deepwater areas are of prime importance for petroleum exploration and development.With...There have been nearly 33 oil and gas fields with billions bbl resources found in deepwater areas all over the world since 1970,so deepwater areas are of prime importance for petroleum exploration and development.With the achievements of a series of deepwater petroleum exploration technology projects in the USA,Europe and Brazil,the GOM,Brazil and West Africa are becoming the focus of deepwater oil and gas exploration.The oil productivity derived from deepwater areas exceeds that of shallow water areas in GOM and Brazil since 2001.Deepwater is becoming very important for petroleum industries and the top area of technology innovations.On the basis of analyses of world deepwater technological innovations,this paper briefly introduces the history of the China National Offshore Oil Corporation （CNOOC）,and then presents the status and challenges of Chinese deepwater oil and gas development.展开更多
This paper presents a probabilistic failure analysis of leakage of the oil and gas in a subsea production system using fault tree analysis(FTA).A fault tree was constructed by considering four major areas where the le...This paper presents a probabilistic failure analysis of leakage of the oil and gas in a subsea production system using fault tree analysis(FTA).A fault tree was constructed by considering four major areas where the leakages can be initiated.These are:gas and oil wells,pipelines,key facilities and third party damage.Conventional FTA requires precise values for the probability of failure of the basic events.However,since the failure data are uncertain,a fuzzy approach to these data is taken which leads to the so-called fuzzy fault tree analysis(FFTA),a method that employs expert elicitation and fuzzy set theories to calculate the failure probabilities of the intermediate events and the top event through identification of the minimal cut sets of the fault tree.A number of importance measures for minimal cut sets and the basic events have been obtained which helps to identify the nature of dependence of the top event on the basic events and thereby can identify the weakest links that may cause leakage in the subsea production system.展开更多
文摘There have been nearly 33 oil and gas fields with billions bbl resources found in deepwater areas all over the world since 1970,so deepwater areas are of prime importance for petroleum exploration and development.With the achievements of a series of deepwater petroleum exploration technology projects in the USA,Europe and Brazil,the GOM,Brazil and West Africa are becoming the focus of deepwater oil and gas exploration.The oil productivity derived from deepwater areas exceeds that of shallow water areas in GOM and Brazil since 2001.Deepwater is becoming very important for petroleum industries and the top area of technology innovations.On the basis of analyses of world deepwater technological innovations,this paper briefly introduces the history of the China National Offshore Oil Corporation （CNOOC）,and then presents the status and challenges of Chinese deepwater oil and gas development.
文摘This paper presents a probabilistic failure analysis of leakage of the oil and gas in a subsea production system using fault tree analysis(FTA).A fault tree was constructed by considering four major areas where the leakages can be initiated.These are:gas and oil wells,pipelines,key facilities and third party damage.Conventional FTA requires precise values for the probability of failure of the basic events.However,since the failure data are uncertain,a fuzzy approach to these data is taken which leads to the so-called fuzzy fault tree analysis(FFTA),a method that employs expert elicitation and fuzzy set theories to calculate the failure probabilities of the intermediate events and the top event through identification of the minimal cut sets of the fault tree.A number of importance measures for minimal cut sets and the basic events have been obtained which helps to identify the nature of dependence of the top event on the basic events and thereby can identify the weakest links that may cause leakage in the subsea production system.
