Ocean Engineering Equipment and Technology ›› 2014, Vol. 1 ›› Issue (3): 195-199.
• Orginal Article • Previous Articles Next Articles
Zi-peng ZHOU, Guo-min SUN, Ning HE
Received:
2014-08-29
Online:
2014-09-20
Published:
2016-03-30
CLC Number:
Zi-peng ZHOU, Guo-min SUN, Ning HE. Risk Evaluation Research of Subsea Oil and Gas Pipeline Stability[J]. Ocean Engineering Equipment and Technology, 2014, 1(3): 195-199.
Table 5
Summary of consequences of risks
风险等级 | 后 果 描 述 |
---|---|
5(灾难性) | 管道全部损失,修复管道需大量的经济投入和长时间停产;大量重度污染介质泄漏;多于一人死亡 |
4(重大) | 失效引起无限期的管道关断,重要的设施失效和重大经济损失;污染介质大量泄漏,但可以从海水或空气中除掉,或经一段时间后被空气和海水分解.修复需要在水下进行,在恢复生产之前,管道系统的修复不能完全被验证有效;有人员受伤,一人死亡 |
3(严重) | 失效引起超出计划的设备或系统损失和较多的修复费用.修复超出计划,需要在水下进行,管道再运行需要提前验证;污染介质中度泄漏,泄漏介质需要一段时间才能在空气中或海水中分解或变中性,或者很容易从海水或空气中除掉;有人员严重受伤,无人员死亡 |
2(轻微) | 污染介质轻微泄漏,泄漏介质在空气中或水中快速分解或变中性;在发生计划关断之前,可以不进行修复,但会产生一定的修复费用;无人员受伤 |
1(可忽略) | 运行期间不重要的效果,会产生少量的修复费用;由于无内部介质泄漏或轻微泄漏,对环境无影响或影响轻微;无人员受伤 |
Table 9
Qualitative evaluation results and recommended weights for stability risks of subsea oil and gas pipeline
影响管道稳定性的因素 | 说 明 | 推荐权重 |
---|---|---|
海床平整度 | 不平整的海床或斜坡均更易受到波流冲刷影响 | 0.15 |
海床沙波沙脊移动 | 导致管道位移或破坏 | 0.10 |
海底强流 | 引起海床冲刷,导致管道悬空 | 0.10 |
波浪 | 波浪荷载加剧海床冲刷,最终影响管道稳定性 | 0.10 |
海床地质 | 砂质粉砂质海床可能液化,粘土质海床可能软化 | 0.10 |
泄漏情况 | 泄漏或破坏过的管道有较高的稳定性风险 | 0.15 |
埋设情况 | 较深埋设能减少管道受到冲刷等破坏 | 0.10 |
维修和检测情况 | 检测维护可对管道现状有较清楚的了解,并制定措施减少风险 | 0.10 |
完整性管理情况 | 评估管道安全状况,是否考虑超期服役 | 0.10 |
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