📚 Eksplorasi & Komparasi Topik Dokumen

EVALUASI STRATEGI PERFORASI BERDASARKAN PENGARUH SKIN PERFORASI TERHADAP KEMAMPUAN ALIR SUMUR PADA SUMUR VERTIKAL, BERARAH, DAN HORIZONTAL DI SUATU LAPANGAN DI SUMATRA SELATAN

This study evaluates the influence of perforation strategy on perforation skin and well deliverability in a mature offshore oil field located in Southeast Sumatra, Indonesia. In cased-and-perforated completions, perforation design plays a critical role in determining inflow efficiency because perforation-induced pressure losses may significantly reduce well productivity. Therefore, identifying an optimum perforation configuration is essential to minimize perforation skin and improve well deliverability. The objective of this study is to evaluate the effects of perforation density and phasing angle on perforation skin and well deliverability and to determine the optimum perforation configuration for wells with different trajectories. The study was conducted on three representative wells, namely RF-14 (horizontal well), KE-07 (deviated well), and FB-01 (vertical well). Reservoir, fluid, well, and completion data under current field conditions were collected and evaluated. Perforation skin was calculated using the Karakas and Tariq model for vertical and deviated wells and the Furui model for horizontal wells. The calculated perforation skin was combined with formation skin and incorporated into inflow performance analysis using PIPESIM. A systematic sensitivity analysis was performed by varying perforation density and phasing angle to investigate their impact on perforation skin and well deliverability. The optimum perforation configuration was selected based on minimum perforation skin and maximum well deliverability. The results indicate that perforation density and phasing angle affect perforation skin behavior and well deliverability. RF-14 achieved its optimum configuration at 8 spf and 90° phasing (m = 4), resulting in a perforation skin of approximately -1.41 and an AOF of 52,308 STB/D. KE-07 achieved its optimum configuration at 16 spf and 45° phasing, resulting in a perforation skin of approximately -1.229 and an AOF of 44,585 STB/D. FB-01 achieved its optimum configuration at 16 spf and 45° phasing, resulting in a perforation skin of approximately -1.159 and an AOF of 108,215 STB/D. The findings show that the optimum perforation configuration varies with well trajectory due to differences in flow geometry, convergence behavior, and reservoir anisotropy effects. The novelty of this study lies in the integrated evaluation of perforation density and phasing angle across vertical, deviated, and horizontal wells within the same mature oil field, providing a comparative understanding of trajectory-dependent perforation behavior and its impact on well deliverability.