Analysis of Development Planning of Own Use Gas Pipeline from Gas Compressor Stations to Gathering Stations in X Field

Ariyon, Muhammad and Ramadhan, Muhammad Setriya (2023) Analysis of Development Planning of Own Use Gas Pipeline from Gas Compressor Stations to Gathering Stations in X Field. Journal of Smart Science and Technology, 3 (1). pp. 44-53. ISSN 2785-924X

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Abstract

Trunkline gas network system from Gas Compressor Station (GCS) B to GS.B-GS.B5 has a total distance of  18 km. The distance of GS.B4-GS.B5 is 9400 m. Gas is the main fuel for engines at gathering stations. A deadlock was found on the GS.B4-GS.B5 pipeline. The solution to this problem is to plan a pipeline between GS.B4-GS.B5 for optimal gas supply. This study conducted an economic analysis of the planning of pipe construction with the same trunkline diameter. The diameter was selected by looking at the effect of pressure drop and erosional velocity using the Pipesim. Then, a problem-solving approach was taken by building a system using a pig launcher. Based on the research results, in the existing conditions with a distance of 9400 m using a diameter of 6 and 4 inches, there is a high pressure drop. Scenario planning minimizes pressure drop by using equal diameter pipes of 4, 6 and 8 inches. The analysis results show that the selected diameter is 6 inches. Pig launcher is designed with safe specs and design. Calculation of the project's economic indicators with an investment of 505,911 US$M and an oil price of 62.38 US$/bbl. Calculation results obtained Net Present Value (NPV) @12% = 6,022 US$M, Internal Rate of Return (IRR) = 495%, Pay Out Time (POT) = 0.19 years, Profitability Index (PI) = 12.90. Sensitivity analysis by changing assumptions 85%, 115% of the basic assumptions, showed the lowest NPV = 4,725 US$M and the lowest IRR = 393%. Based on the results, this project is profitable and feasible to be developed from an economic perspective.

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