Determination of An Appropriate Method and Economic Cost Estimation for Plug and Abandonment of H-11 Well in The Tambun Field
DOI:
https://doi.org/10.29017/scog.v49i3.2141Keywords:
plug and abandonment, cost estimation, cement plug, SNI 13-6910-2002, NORSOK Standard D-010Abstract
In accordance with Indonesian regulations, oil and gas wells approaching the end of their productive life and no longer economically viable must undergo plug and abandon (P&A) operations. The associated costs are the responsibility of the operating company. Therefore, operator must conduct technical and economic assessments to ensure that P&A operations are performed cost-effectively while complying with safety requirements, operational standards, and applicable national regulations. This study compares two plugs and abandonment methods for a directional well by evaluating the technical and economic performance of the SNI 13-6910-2002 and NORSOK Standard D-010. The Tambun field comprises several production wells, including the H-11 well, which was selected as the reference case for planning permanent abandonment after reaching its economic limit. The P&A design was developed by identifying the well sections requiring cement isolation and calculating the required volumes of cement, additives, and completion fluids using the rig-based abandonment method. The results provide an appropriate abandonment strategy and costs estimate for the tH-11 well based on both standards. The estimated abandonment cost is USD 505,737.59 using SNI 13-6910-2002, compared with USD 1,170,558.11 using NORSOK Standard D-010. Based on the comprehensive technical assessment, operational safety considerations, regulatory compliance, and economic evaluation, SNI 13-6910-2002 is recommended as the most suitable method for the permanent plug and abandonment of the H-11 well in Tambun field.
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