Exploring CO2-H2S Storage in Deep Saline Aquifers: A Case Study from an Offshore Gas Field in Malaysia. From Lab to Numerical Simulation

M. F. Zaidin, A. Valtz, A. Chapoy, R. D. Tewari

Research output: Chapter in Book/Report/Conference proceedingConference contribution


Most carbon dioxide (CO2) storage schemes rely on storing CO2 in its supercritical state, free from impurities (SNC-Lavalin Inc., 2004). The X field reservoir model, like many other existing reservoir models, assumes pure CO2 injection for its numerical simulation of CO2 storage. However, one of the gas sample analyses from the X field revealed the presence of trace amounts of hydrogen sulfide (H2S,) ranging from 500 to 1000 ppm. Given the limitations of the separation technology, there is a potential scenario where CO2 might be co-injected with H2S for storage. Understanding the impact of this H2S within the injected CO2 stream is crucial for ensuring the success of Carbon Capture and Storage (CCS) operations (Basava-Reddi et al., 2014; Wang et al., 2011). There is a possibility of CO2 being co-injected with this H2S for storage. The effect of the contaminant in the injected CO2 stream needs to be accessed to ensure the success of the CCS operation. The alterations in the base CO2 solubility can ultimately influence storage integrity and capacity (Ahmad et al., 2023). While abundant solubility data for CO2 in water or brine exist in the literature (A Chapoy et al., 2004; Valtz et al., 2004; Ahmadi & Chapoy, 2018), limited data are available for this ternary CO2- H2S-Brine system. Therefore, the need to quantify the impact of H2S impurities on CO2 solubility is evident. In this context, extensive laboratory experiments were undertaken to address these uncertainties and further refine the X field dynamic model for enhanced accuracy.

Original languageEnglish
Title of host publicationInternational Petroleum Technology Conference 2024
ISBN (Electronic)9781959025184
Publication statusPublished - 12 Feb 2024
Event2024 International Petroleum Technology Conference - Dhahran, Saudi Arabia
Duration: 12 Feb 2024 → …


Conference2024 International Petroleum Technology Conference
Abbreviated titleIPTC 2024
Country/TerritorySaudi Arabia
Period12/02/24 → …

ASJC Scopus subject areas

  • Geochemistry and Petrology
  • Fuel Technology


Dive into the research topics of 'Exploring CO2-H2S Storage in Deep Saline Aquifers: A Case Study from an Offshore Gas Field in Malaysia. From Lab to Numerical Simulation'. Together they form a unique fingerprint.

Cite this