Study on the Influential Factors of CO2 Storage in Low Permeability Reservoir

被引:10
作者
Yue, Ping [1 ,2 ]
Zhang, Rujie [1 ]
Sheng, James J. [3 ]
Yu, Gaoming [4 ]
Liu, Feng [5 ]
机构
[1] Southwest Petr Univ, State Key Lab Reservoir Geol & Dev, Chengdu 610500, Peoples R China
[2] China Univ Petr, Inst Unconvent Oil & Gas Sci & Technol, Beijing 102249, Peoples R China
[3] Texas Tech Univ, Inst Petr Engn, Lubbock, TX 79409 USA
[4] PetroChina, Changqing Oilfield Co, Res Inst Explorat & Dev, Xian 710018, Peoples R China
[5] Xian Shiyou Univ, Sch Petr Engn, Xian 710065, Peoples R China
基金
中国博士后科学基金;
关键词
carbon dioxide; storage capacity; oil recovery factor; low permeability reservoirs; ENHANCED OIL-RECOVERY; SEQUESTRATION; CAPACITY; PRESSURE;
D O I
10.3390/en15010344
中图分类号
TE [石油、天然气工业]; TK [能源与动力工程];
学科分类号
0807 ; 0820 ;
摘要
As the demands of tight-oil Enhanced Oil Recovery (EOR) and the controlling of anthropogenic carbon emission have become global challenges, Carbon Capture Utilization and Sequestration (CCUS) has been recognized as an effective solution to resolve both needs. However, the influential factors of carbon dioxide (CO2) geological storage in low permeability reservoirs have not been fully studied. Based on core samples from the Huang-3 area of the Ordos Basin, the feasibility and influential factors of geological CO2 sequestration in the Huang-3 area are analyzed through caprock breakthrough tests and a CO2 storage factor experiment. The results indicate that capillary trapping is the key mechanism of the sealing effect by the caprock. With the increase of caprock permeability, the breakthrough pressure and pressure difference decreased rapidly. A good exponential relationship between caprock breakthrough pressure and permeability can be summarized. The minimum breakthrough pressure of CO2 in the caprock of the Huang-3 area is 22 MPa, and the breakthrough pressure gradient is greater than 100 MPa/m. Huang-3 area is suitable for the geological sequestration of CO2, and the risk of CO2 breakthrough in the caprock is small. At the same storage percentage, the recovery factor of crude oil in larger permeability core is higher, and the storage percentage decreases with the increase of recovery factor. It turned out that a low permeability reservoir is easier to store CO2, and the storage percentage of carbon dioxide in the miscible phase is greater than that in the immiscible phase. This study can provide empirical reference for caprock selection and safety evaluation of CO2 geological storage in low permeability reservoirs within Ordos Basin.
引用
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页数:10
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