Identification of oil spills from offshore installations. Presentation of methods and preliminary results from the osis, “oil spill identification sensor” project

J. Holst
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Abstract

The key driver behind the development of the OSIS sensor system was to pursue implementation of the MARPOL 73/78 annex 1 protocol on offshore installations in line with what is already implemented on vessels. Due to the high number of offshore installations within the “Special Areas” these installations have so far been subject to exemption from the MARPOL 73/78 annex 1 directive. The main reason for this regulative exemption is the lack of surveillance methods capable of monitoring oil spills from offshore installations effectively. The objective for the OSIS project is to develop and demonstrate a sensor system mounted directly on offshore installations performing 24hours a-day surveillance, hereby providing the means to remove the legislative exemption. A functional model of the OSIS sensor system was built in 2003 and tests are currently being performed onshore as well as offshore demonstrating the capability of the system to identify and measure volume of oil spills effectively. The input to the OSIS system is collected by a Sensor Pack based on advanced microwave sensors placed on the offshore installation. The Sensor Pack is continuously monitoring the surrounding waters measuring both area and volume of oil spills. Based on data from the Sensor Pack a rule based pattern recognition system identifies the oil spill. When an oil spill is detected pictures are transmitted to an onshore based Central Server. In the paper various sensor types and oil detection systems are discussed and the resulting components in the OSIS system are presented. Governmental and non-governmental target groups can have access to the info screens illustrated below via a traditional web interface. The end user is presented relevant information about the location of the rig, status of the sensor measurements and in case of an oil spill, the estimated contamination area and amount spilled. Data is transmitted into an onshore database by a satellite link from a local positioned master unit, gathering data from up to 16 sensors placed on different offshore rigs. The OSIS sensor system has been tested under controlled input conditions by discharging various amounts and types of oil on a water surface. The paper will present these results and discuss what accuracy can be expected from the oil volume measurements. The OSIS demonstration project was started in December 2001 after receiving commitment from the Danish Environmental Protection Agency and Danish Energy Agency to build a prototype system. With financial support from LIFE Environment and the Ministry of Science Technology and Innovation, OSIS International pursued the objective of designing a sensor that was able to monitor oil spills from offshore installations.
海上设施溢油的识别。介绍了“溢油识别传感器”项目的方法和初步结果
开发OSIS传感器系统背后的关键驱动力是在海上设施上实施MARPOL 73/78附件1协议,与已经在船舶上实施的协议保持一致。由于“特殊区域”内的大量海上设施,这些设施到目前为止都不受《73/78防污公约》附件1指令的约束。这种监管豁免的主要原因是缺乏能够有效监测海上设施溢油的监测方法。OSIS项目的目标是开发和演示直接安装在海上设施上的传感器系统,执行24小时全天候监视,从而提供消除立法豁免的手段。OSIS传感器系统的功能模型于2003年建立,目前正在陆上和海上进行测试,证明了该系统有效识别和测量溢油量的能力。输入到OSIS系统的数据由一个传感器包收集,该传感器包基于安装在海上装置上的先进微波传感器。传感器组持续监测周围水域,测量石油泄漏的面积和体积。基于传感器包的数据,基于规则的模式识别系统可以识别溢油。当检测到石油泄漏时,图像将被传输到岸上的中央服务器。本文讨论了各种类型的传感器和油液检测系统,并给出了OSIS系统的组成。政府和非政府目标群体可以通过传统的网络界面访问如下所示的信息屏幕。最终用户将获得有关钻机位置、传感器测量状态以及漏油情况下估计污染区域和泄漏量的相关信息。数据通过卫星链路从本地定位的主单元传输到陆上数据库,从放置在不同海上钻井平台上的多达16个传感器收集数据。OSIS传感器系统已经在控制输入条件下通过在水面上排放不同数量和类型的油进行了测试。本文将介绍这些结果,并讨论从油体积测量中可以预期的精度。在得到丹麦环境保护署和丹麦能源署建造原型系统的承诺后,OSIS示范项目于2001年12月开始。在LIFE Environment和科学技术与创新部的资金支持下,OSIS International致力于设计一种能够监测海上设施漏油的传感器。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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