Determination of the Risk of Oil and Gas Offshore Pipelines in Indonesia: A Risk-Based Analysis Approach for Developing Inspection Strategy Policy

Abstract

 Indonesia has a target of producing 1 million BOPD of oil and 12 BSCFD of natural gas in 2030. The strategy for achieving the production target in 2030 is transformation from resources to production, accelerating chemical EOR, massive connectivity for finding large wells, and optimizing field production. In optimizing existing field production, one of the supporting factors is production facilities, so production facilities with good integrity are needed to minimize upplanned shutdowns. One of the oil and gas installations that pose a high risk is the installation of oil and gas pipelines. The existing pipeline installation in the Java Sea, from North Cirebon to the Seribu Islands, has an area of 8300 km2 and is operated by PT XYZ. Therefore, it requires complete and accurate inspection data to find out. This research method uses a modification of the Kent Mulhbauer scoring index. The risk level of the three subsea pipelines at Company XYZ, namely 4 in Gas Line Mike Mike, 8 in Gas Line Echo pipeline, and 8 in Gas Line Mike Mike pipeline, is found to be in the very highrisk category. The inspection strategy carried out for the third pipe with a very high risk category is visual inspection (ROV), freespan assessment, cathodic protection check (CP), UT thickness inspection on the riser and elbow (topside and subsea), and UT thickness inspection on the bottom pipe sea using the NACE ICDA method for thickness taking points and inspection periods once every 4 years or based on risk-based inspection (RBI). The cost and effort of examining the strategy will be assessed directly with the level of the risk category. Because of this, so that the inspection of the strategy can be optimal, effective, and efficient, it is divided into 3 (three) risk categories, namely low, medium, and high/very high, where the selection of strategy inspection is appropriate with the level of risk. The results of this study are expected to be a reference in making a policy or regulation to carry out regular inspections of underwater pipelines by using the risk analysis method to determine the inspection strategy.