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Gas Physical Properties and their Implication on Gas Saturation and Leakage in Deep Reservoirs- A Case Study of Cambrian Gas Field, Sichuan Basin, China
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, Fifth International Conference on Fault and Top Seals, Sep 2019, Volume 2019, p.1 - 5
Abstract
Based on series of experiments and numerical calculation, the gas physical properties (i.e. density, gas-water interfacial tension) were obtained and their implication on hydrcarbon saturation was studied. Furthermore, and evaluation model was established based on the identification of different types of residue water to obtain gas/water saturation in reservoirs. It is concluded that the lower interfacial tension between gas and water helps the gas charges into reservoirs and thus higher gas saturation was observed in the results of calculation. In addition, the more complicated hydrcarbon saturation variation during burial history was studied. It is found that the seal rock is thin thickness(∼50m) and gas in the reservoir tended to loss during the uplift in burial history.