Joint Industry Project Developing a Best Available Technique Methodology for Selecting Leak Detection Systems

Abstract

Abstract The oil and gas industry is putting increased focus on leak detection and use of remote sensing to detect, limit and respond to oil spills. There are a wide variety of techniques that can be applied, each with its strengths and limitations. A crucial element of a leak detection system is the selection of techniques to cover the areas of an offshore facility with highest risk or vulnerable areas. A Best Available Techniques (BAT) method and tool have been developed to select leak detection techniques, as part of a Joint Industry Project (JIP) in Norway. The aim was to establish a generic method and tool for decision-making and documentation. A draft was established based on the authors’ experience with BAT assessments and with selection of leak detection and remote sensing techniques. The suggested solution was then improved during workshops and through communication with the JIP participants. The method and tool were developed for both new and mature fields in order to establish and document the BAT taking into account site-specific conditions. The scope included reviewing environmental, technical and economic criteria which influence the evaluation of leak detection techniques. The result of the development work was a descriptive method and a practical tool including a scope and pre-screening with a suggested list of available techniques. The JIP included a thorough mapping of existing and emerging techniques, and the results of this activity are reflected in the BAT-tool's list of techniques. A first BAT evaluation assesses techniques separately, based on established criteria. Techniques are then grouped and system configurations are established (i.e. a combination of several techniques working as a system). The second BAT evaluation assesses the combined techniques as a system and concludes on a recommended solution. The paper focuses on the benefits and challenges of a generic BAT-based methodology and tool for leak detection techniques. Experiences from a specific case where the methodology was applied will also be included. The paper presents and discusses the challenges and opportunities linked to applying an already known concept (BAT) for a certain area relevant for the offshore oil and gas industry. The same approach to establishing a BAT selection methodology can also be applied for other areas/systems on an offshore installation. The generic approach developed as part of this work gives users a structured way for selecting the best available leak detection techniques for specific installations.