Dissolving capacity and volume expansion of carbon dioxide in chain n-alkanes
Five kinds of n-alkanes, which have high proportions in crude oil from China, were mixed with CO2 of different molar fractions forming oil-gas systems. The dissolution of CO2 in the five n-alkanes and the system volume swelling were studied through the constant component expansion (CCE) experiments...
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
KeAi Communications Co., Ltd.
2015-02-01
|
| Series: | Petroleum Exploration and Development |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S1876380415600118 |
| _version_ | 1818617764233871360 |
|---|---|
| author | Haishui HAN Shiyi YUAN Shi LI Xiaolei LIU Xinglong CHEN |
| author_facet | Haishui HAN Shiyi YUAN Shi LI Xiaolei LIU Xinglong CHEN |
| author_sort | Haishui HAN |
| collection | DOAJ |
| description | Five kinds of n-alkanes, which have high proportions in crude oil from China, were mixed with CO2 of different molar fractions forming oil-gas systems. The dissolution of CO2 in the five n-alkanes and the system volume swelling were studied through the constant component expansion (CCE) experiments in different temperatures. The pressure-volume curves of the n-alkanes–CO2 systems are not strictly two-part straight lines. The bending degree is affected by the parameters of temperature, pressure, CO2 molar fraction and n-alkanes. Bubble point pressure of the oil-CO2 system is a linear relationship with the temperature. Besides, as the CO2 fraction increases, the bubble point pressure goes up largely. There is a fact that the CO2 solubility in different kinds of alkanes is nearly the same in low pressure condition, while the solubility is inversely proportional to the carbon number in high pressure. The dissolution of CO2 may swell the system, and temperature and pressure are not the main reasons. However, the swelling factor increases quickly as the CO2 molar fraction goes up, and lowers with the carbon number increase. The oil swelling has a great significance for oilfield development and well production. Key words: n-alkanes, carbon dioxide, CCE experiment, solubility, volume swelling |
| first_indexed | 2024-12-16T17:10:53Z |
| format | Article |
| id | doaj.art-1df2eca7958e42a19e27d08ab568bf21 |
| institution | Directory Open Access Journal |
| issn | 1876-3804 |
| language | English |
| last_indexed | 2024-12-16T17:10:53Z |
| publishDate | 2015-02-01 |
| publisher | KeAi Communications Co., Ltd. |
| record_format | Article |
| series | Petroleum Exploration and Development |
| spelling | doaj.art-1df2eca7958e42a19e27d08ab568bf212022-12-21T22:23:24ZengKeAi Communications Co., Ltd.Petroleum Exploration and Development1876-38042015-02-0142197103Dissolving capacity and volume expansion of carbon dioxide in chain n-alkanesHaishui HAN0Shiyi YUAN1Shi LI2Xiaolei LIU3Xinglong CHEN4Research Institute of Petroleum Exploration & Development, PetroChina, Beijing 100083, China; State Key Laboratory of Enhanced Oil Recovery, Beijing 100083, China; Corresponding authorScience & Technology Management Department, CNPC, Beijing 100007, ChinaResearch Institute of Petroleum Exploration & Development, PetroChina, Beijing 100083, China; State Key Laboratory of Enhanced Oil Recovery, Beijing 100083, ChinaInstitue of Porous Flow & Fluid Mechanics, Chinese Academy of Sciences, Langfang 065007, ChinaResearch Institute of Petroleum Exploration & Development, PetroChina, Beijing 100083, China; State Key Laboratory of Enhanced Oil Recovery, Beijing 100083, ChinaFive kinds of n-alkanes, which have high proportions in crude oil from China, were mixed with CO2 of different molar fractions forming oil-gas systems. The dissolution of CO2 in the five n-alkanes and the system volume swelling were studied through the constant component expansion (CCE) experiments in different temperatures. The pressure-volume curves of the n-alkanes–CO2 systems are not strictly two-part straight lines. The bending degree is affected by the parameters of temperature, pressure, CO2 molar fraction and n-alkanes. Bubble point pressure of the oil-CO2 system is a linear relationship with the temperature. Besides, as the CO2 fraction increases, the bubble point pressure goes up largely. There is a fact that the CO2 solubility in different kinds of alkanes is nearly the same in low pressure condition, while the solubility is inversely proportional to the carbon number in high pressure. The dissolution of CO2 may swell the system, and temperature and pressure are not the main reasons. However, the swelling factor increases quickly as the CO2 molar fraction goes up, and lowers with the carbon number increase. The oil swelling has a great significance for oilfield development and well production. Key words: n-alkanes, carbon dioxide, CCE experiment, solubility, volume swellinghttp://www.sciencedirect.com/science/article/pii/S1876380415600118 |
| spellingShingle | Haishui HAN Shiyi YUAN Shi LI Xiaolei LIU Xinglong CHEN Dissolving capacity and volume expansion of carbon dioxide in chain n-alkanes Petroleum Exploration and Development |
| title | Dissolving capacity and volume expansion of carbon dioxide in chain n-alkanes |
| title_full | Dissolving capacity and volume expansion of carbon dioxide in chain n-alkanes |
| title_fullStr | Dissolving capacity and volume expansion of carbon dioxide in chain n-alkanes |
| title_full_unstemmed | Dissolving capacity and volume expansion of carbon dioxide in chain n-alkanes |
| title_short | Dissolving capacity and volume expansion of carbon dioxide in chain n-alkanes |
| title_sort | dissolving capacity and volume expansion of carbon dioxide in chain n alkanes |
| url | http://www.sciencedirect.com/science/article/pii/S1876380415600118 |
| work_keys_str_mv | AT haishuihan dissolvingcapacityandvolumeexpansionofcarbondioxideinchainnalkanes AT shiyiyuan dissolvingcapacityandvolumeexpansionofcarbondioxideinchainnalkanes AT shili dissolvingcapacityandvolumeexpansionofcarbondioxideinchainnalkanes AT xiaoleiliu dissolvingcapacityandvolumeexpansionofcarbondioxideinchainnalkanes AT xinglongchen dissolvingcapacityandvolumeexpansionofcarbondioxideinchainnalkanes |