期刊
ENVIRONMENTAL SCIENCE & TECHNOLOGY
卷 50, 期 5, 页码 2727-2734出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.est.5b05925
关键词
-
资金
- Qatar Carbonates and Carbon Storage Research Centre (QCCSRC)
- Qatar Petroleum
- Shell
- Qatar Science & Technology Park
Early deployment of carbon dioxide storage is likely to focus on injection into mature oil reservoirs, most of which occur in carbonate rock units. Observations and modeling have shown how capillary trapping leads to the immobilization of CO2 in saline aquifers, enhancing the security and capacity of storage. There are, however, no observations of trapping in rocks with a mixed-wet-state characteristic of hydrocarbon-bearing carbonate reservoirs. Here, we found that residual trapping of supercritical CO2 in a limestone altered to a mixed-wet state with oil was significantly less than trapping in the unaltered rock. In unaltered samples, the trapping of CO2 and N-2 were indistinguishable, with a maximum residual saturation of 24%. After the alteration of the wetting state, the trapping of N-2 was reduced, with a maximum residual saturation of 19%. The trapping of CO, was reduced even further, with a maximum residual saturation of 15%. Best-fit Land-model constants shifted from C = 1.73 in the water-wet rock to C = 2.82 for N-2 and C = 4.11 for the CO2 in the mixed-wet rock. The results indicate that plume migration will be less constrained by capillary trapping for CO2 storage projects using oil fields compared with those for saline aquifers.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据