Feasibility of CO2 Monitoring Injection in ISGNA Field Through AVO and Rock Physics Approach

Silvanus, Timothy Imanuel Laurent (2024) Feasibility of CO2 Monitoring Injection in ISGNA Field Through AVO and Rock Physics Approach. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Rising global concerns over carbon dioxide (CO2) emissions, reaching 36.3 Gt in 2021, underscore the urgency of effective mitigation strategies. This research focuses on the sequestration of CO2 in underground geological storage, considered as one of the most effective options to address this issue, with a specific emphasis on monitoring CO2 injection into the I-35 reservoir, ISGNA Field. The study explores the seismic amplitude response through synthetic seismic seismograms, employing Gassmann fluid substitution modeling and AVO techniques based on the Aki-Richards approach. Discriminating CO2 presence in three saturation scenarios (0% CO2, 50% CO2 and 100% CO2), the investigation delves into various rock elastic properties as P-wave velocity, S-wave velocity, density, bulk modulus, shear modulus, Young’s modulus, Poisson’s ratio, Lambda, Vp/Vs ratio, P-impedance, S-impedance, Mu-Rho, and Lambda-Rho; and AVO attributes such as intercept (A) and gradient (B). Notably, Lambda-Rho emerges as a highly sensitive parameter, demonstrating a significant 38.13% decline at full CO2 saturation and a noteworthy 35.75% decrease at 50%. The gradient (B) parameter exhibits substantial sensitivity, with a notable 42% decrease at 50% CO2 saturation and a subsequent 32% decrease at 100% CO2 saturation. Furthermore, the AVO class analysis resulted in a Class IV AVO anomaly. This research contributes nuanced insights into the seismic monitoring of CO2 injection, emphasizing Lambda-Rho's pivotal role as a key indicator of reservoir conditions in response to varying CO2 saturations.
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Meningkatnya kekhawatiran global terhadap emisi karbon dioksida (CO2), yang mencapai 36,3 Gt pada tahun 2021, menunjukan pentingnya strategi mitigasi yang efektif. Penelitian ini berfokus pada penyimpanan CO2 di dalam penyimpanan geologis bawah tanah yang dianggap sebagai salah satu opsi paling efektif untuk mengatasi masalah ini, dengan penekanan khusus pada monitoring injeksi CO2 ke dalam reservoar I-35, Lapangan ISGNA. Penelitian ini mengeksplorasi respons amplitudo seismik melalui seismogram sintetis, menggunakan pemodelan substitusi fluida Gassmann dan teknik Amplitude Variation with Offset (AVO) berdasarkan pendekatan Aki-Richards. Dengan membedakan keberadaan CO2 dalam tiga skenario saturasi (0% CO2, 50% CO2, dan 100% CO2), penelitian ini menyelidiki berbagai properti elastis batuan seperti kecepatan gelombang P, kecepatan gelombang S, densitas, modulus bulk, modulus geser, modulus Young, rasio Poisson, Lambda, rasio Vp/Vs, impedansi P, impedansi S, Mu-Rho, dan Lambda-Rho; serta atribut AVO seperti intercep (A) dan gradien (B). Dalam penelitian in, Lambda-Rho muncul sebagai parameter yang sangat sensitif, menunjukkan penurunan signifikan sebesar 38.13% pada saturasi CO2 penuh dan penurunan sebesar 35.75% pada 50%. Parameter gradien (B) menunjukkan sensitivitas yang substansial, dengan penurunan signifikan sebesar 42% pada saturasi 50% CO2 dan penurunan selanjutnya sebesar 32% pada saturasi 100% CO2. Selain itu, analisis kelas AVO menghasilkan anomali AVO Kelas IV. Penelitian ini memberikan wawasan dalam monitoring seismik terhadap injeksi CO2, dengan menunjukan parameter Lambda-Rho sebagai indikator utama kondisi reservoir dalam merespons variasi saturasi CO2.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	AVO analysis, CO2 injection, Fluid substitution, Rock elastic properties, Analisis AVO, Injeksi CO2, Substitusi fluida, Sifat elastis batuan.
Subjects:	Q Science > QC Physics > QC221 Acoustics. Sound Q Science > QE Geology > QE538.5 Seismic tomography; Seismic waves. Elastic waves Q Science > QE Geology > QE539.2.S4 Seismic models T Technology > TN Mining engineering. Metallurgy > TN269 Prospecting--Geophysical methods
Divisions:	Faculty of Civil, Environmental, and Geo Engineering > Geophysics Engineering > 33201-(S1) Undergraduate Theses
Depositing User:	Timothy Imanuel Laurent Silvanus
Date Deposited:	09 Feb 2024 23:55
Last Modified:	09 Feb 2024 23:55
URI:	http://repository.its.ac.id/id/eprint/106674

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