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Penulis : Muhammad Daffa Juned [12222073]
Kontributor / Dosen Pembimbing :
  • Prof. Ir. Tutuka Ariadji, M.Sc., Ph.D.
  • Dr. Prasandi Abdul Aziz, S.Si., M.T.
Jenis Koleksi : Tugas Akhir
Tahun Terbit : 2026
Penerbit : Teknik Perminyakan
Fakultas : Fakultas Teknik Pertambangan dan Perminyakan
Subjek : Mining & related operations
Kata Kunci : Carbon Capture and Storage, depleted oil reservoir, Land’s Trapping Constant, residual trapping, relative permeability hysteresis, storage efficiency
Sumber :
Staf Input/Edit : Helmi rifqi Rifaldy  
File : 2 file
Tanggal Input : 18 Jul 2026

This study evaluates the effect of Land’s Trapping Constant (C) on CO? residual trapping behavior in Field “P”, a depleted oil reservoir in the Bekasap Formation, Central Sumatra Basin, using an existing threedimensional reservoir simulation model. Continuous pure CO? injection was simulated at a rate of 1 MMSCFD for 10 years, followed by 100 years of post-injection monitoring. Sensitivity analysis was conducted by varying Land’s Trapping Constant from ???? = 1 to ???? = 7 to represent low-to-high residual trapping behavior, while ???? = 1, ???? = 3, and ???? = 6 were selected as representative scenarios for CO? plume visualization. The estimated CO? storage capacity of the reservoir model is 1.26 MtCO?, with a total injected CO? mass of 0.19 MtCO? and a storage efficiency of 15.19%, which remain identical for all sensitivity scenarios because these parameters are controlled mainly by pore volume, CO? density, injection rate, injection duration, and pressure constraint. The simulation results show that increasing Land’s Trapping Constant reduces residual trapping performance, as the Residual Trapping Index decreases from 20.71% at ???? = 1 to 5.42% at ???? = 7. In contrast, the Mobile Ratio increases from 6.40% at ???? = 1 to approximately 18.64% at ???? = 7, indicating greater mobile gas persistence at higher C values. The CO? component distribution confirms that the main sensitivity occurs in the gas phase, where residual gas decreases and mobile gas increases as C becomes larger, while CO? in the liquid phases shows smaller variation. Plume visualization further indicates that post-injection plume behavior becomes more distinguishable after 100 years, where lower C values leave a more visible residual saturation trail and provide more favorable storage behavior by reducing mobile CO?. Therefore, Land’s Trapping Constant does not control volumetric storage capacity under the evaluated scenario, but strongly influences residual trapping, mobile gas persistence, and long-term CO? storage security.

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