| The rapid development of society, human needs and dependence on energy is also increasing. Oil is one of the world’s most important energy, due to the gradual reduction of onshore oil and gas resources, has been unable to meet the production needs of human society, for humanity put eyes accounted for 71 percent of the Earth’s surface is rich in biological resources and marine mineral resources. China has more than 18,000 kilometers of coastline, over 6,500 islands. In the nearly three million square kilometers of sea, Sea continental shelf oil and gas basin area of nearly 700,000 square kilometers, forecast resources of 27.53 billion tons of oil and natural gas resources amount to 10.6 trillion cubic meters, the total amount of energy in various forms over the ocean 400 million kilowatts hl, currently found in 18.5% rate of crude oil, natural gas discovery was only 9.2%, great exploration and development potential. The International Energy Agency (IEA) in a recent study reported that the next 30 years the global energy industry needs to invest $16 trillion, in order to meet the energy needs for the same period in which oil and gas investment should reach $3 trillion. According to the IEA’s 2003 World Energy Investment Outlook to 2030, global energy demand will grow at a rate of 1.7% per year, which will increase to 1.2 billion barrels of oil demand old, natural gas demand will double by the year 2000 on the basis of, investment in oil and gas fields, about 3/4 will be used for exploration and development, offshore production will account for a growing proportion.For the actual production needs offshore oilfield, offshore platforms offshore facilities construction ready to extend the period of service. In order to protect the safety of future production, oilfield operator life extension work to be carried out the overall structure of the offshore platform facilities offshore facilities. What are the implications for the full identification of offshore platform structures offshore facilities exist on the system continues to produce the safety factors, the impact of these factors on the qualitative and quantitative evaluation, and clearly in the framework of standards in offshore platform facilities can continue to secure offshore structures service, to carry out safety assessment work life extension facilities offshore platform structure is necessary.In this paper, specifically1, in the study of theory, this paper extensive collection, and analysis of the research progress at home and abroad in recent years, offshore platform safety assessment, analyze and summarize the results of these studies have been made and the problems;2, the specific requirements for safety testing on offshore production facilities detailed description of the evaluation of the status of offshore platforms and offshore platforms should be how to write test reports, as well as specific methods of evaluation. Should be targeted at different parts of what kind of research methods based on existing standards and how to evaluate the results.3, the paper carried out through various life extension evaluation:1 for structural facilities, life-cycle facilities collected data, the overall structure modeling facilities, facility construction defect assessment, facility construction risk assessment; 2 in the upper facilities for collecting finishing the upper part of the life cycle of information facilities, facilities to carry out the upper tube defects detected by measuring thickness measurement components, equipment preventive maintenance data, moving equipment to carry out special testing equipment testing work station can not replace the parts, moving work of special testing equipment, facilities operation and operability analysis, life extension level of operational safety analysis; 3 for the pipeline on the seabed, with modern mechanical fracture mechanics, mechanics of materials, elastic-plastic mechanics and reliability of systems engineering is based on solving practical problems pipeline component shapes, materials and performance deviation defects in material science tools based test, quality inspection, nondestructive testing and other means of detection, assessment to ensure the pipeline due to the known mechanisms such as cracks, brittle fracture, fatigue failure, stress corrosion failure incidents do not occur in the future.In summary, an oilfield facility life extension safety evaluation key point is detected defects comprehensive facilities, fully consider the joint effects of expansion and life extension, to carry out systematic safety analysis based on the reliability of the data. |
PDF Full Text Request