Publications

Indonesia has significant potential for oil and gas sector development, particularly through mature well improvement initiatives and idle well reactivation. However, maximizing this potential requires a well-planned and strategic approach to ensure efficient resource utilization and sustainable operations. To address this challenge, the Heterogeneity Index (HI) provides a systematic and effective method for evaluating well performance by analyzing variations in production metrics, such as cumulative oil or gas production, cumulative water production, and flow rates, relative to the field’s average. This study applies the HI method to a field in East Kalimantan, evaluating approximately 104 idle wells. The analysis enabled a detailed assessment of individual well performance compared to others in the field, identifying wells with above-average performance (HI > 0) as high-priority candidates for reactivation. Furthermore, the HI method functions as a tool for spatial mapping, allowing for the analysis of performance variations between adjacent wells. This analysis can reveal whether unopen zones exist within wells, offering potential behind-casing opportunities that could further enhance well performance. Through this process, 10 idle wells were identified for further evaluation, with 8 confirmed as viable candidates for reactivation after a detailed assessment, which was integrated with well log interpretation to determine the presence of behind-casing opportunities. Additionally, the evaluation considered existing opportunities from remaining reserves and applied well diagnostics, including the Chan plot and nodal analysis, to assess production potential. The findings demonstrate that the HI method not only accelerates well selection but also enhances accuracy in identifying wells with the highest reactivation potential.