Impact of water saturation and cation concentrations on wettability alteration and oil recovery of carbonate rocks using low-salinity water
Abstract In this study, the effect of initial water saturation on the oil recovery for carbonate rocks is investigated using spontaneous imbibition experiments. The experiments are performed using 20 times diluted sea water as imbibing fluid and the sea water as initial water. In addition, the impac...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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SpringerOpen
2018-09-01
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| Series: | Journal of Petroleum Exploration and Production Technology |
| Subjects: | |
| Online Access: | http://link.springer.com/article/10.1007/s13202-018-0552-2 |
| _version_ | 1797991921077977088 |
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| author | Mohammad Reza Zaeri Hamidreza Shahverdi Rohallah Hashemi Mohsen Mohammadi |
| author_facet | Mohammad Reza Zaeri Hamidreza Shahverdi Rohallah Hashemi Mohsen Mohammadi |
| author_sort | Mohammad Reza Zaeri |
| collection | DOAJ |
| description | Abstract In this study, the effect of initial water saturation on the oil recovery for carbonate rocks is investigated using spontaneous imbibition experiments. The experiments are performed using 20 times diluted sea water as imbibing fluid and the sea water as initial water. In addition, the impact of pH and Ca2+, Mg2+, Na+, and K+ cations concentration change of imbibing fluid are investigated during tests. These results help to identify the active cations in the wettability alteration process of carbonate rocks during the low-salinity water injection. A mechanism is proposed to describe the effect of initial water saturation on the oil recovery by low-salinity water injection. The impact of initial water saturation on the wettability alteration might be positive or negative depending on its value and the rock permeability. The comparison of divalent cations concentrations shows that the minimum adsorption of Ca2+ and maximum desorption of Mg2+ lead to maximum oil recovery of spontaneous imbibition. The results confirm that three cations of Ca2+, Mg2+, and Na+ are active for wettability alteration of carbonate rocks in the presence of sea water as initial water and diluted sea as imbibing fluid, whilst the amounts of potassium remain constant. |
| first_indexed | 2024-04-11T08:59:56Z |
| format | Article |
| id | doaj.art-db36fa5a7e0244718a8ee1e43a8f2e43 |
| institution | Directory Open Access Journal |
| issn | 2190-0558 2190-0566 |
| language | English |
| last_indexed | 2024-04-11T08:59:56Z |
| publishDate | 2018-09-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | Journal of Petroleum Exploration and Production Technology |
| spelling | doaj.art-db36fa5a7e0244718a8ee1e43a8f2e432022-12-22T04:32:50ZengSpringerOpenJournal of Petroleum Exploration and Production Technology2190-05582190-05662018-09-01921185119610.1007/s13202-018-0552-2Impact of water saturation and cation concentrations on wettability alteration and oil recovery of carbonate rocks using low-salinity waterMohammad Reza Zaeri0Hamidreza Shahverdi1Rohallah Hashemi2Mohsen Mohammadi3Department of Chemical Engineering, Isfahan University of TechnologyDepartment of Chemical Engineering, Isfahan University of TechnologyDepartment of Chemical Engineering, Isfahan University of TechnologyDepartment of Chemical Engineering, Isfahan University of TechnologyAbstract In this study, the effect of initial water saturation on the oil recovery for carbonate rocks is investigated using spontaneous imbibition experiments. The experiments are performed using 20 times diluted sea water as imbibing fluid and the sea water as initial water. In addition, the impact of pH and Ca2+, Mg2+, Na+, and K+ cations concentration change of imbibing fluid are investigated during tests. These results help to identify the active cations in the wettability alteration process of carbonate rocks during the low-salinity water injection. A mechanism is proposed to describe the effect of initial water saturation on the oil recovery by low-salinity water injection. The impact of initial water saturation on the wettability alteration might be positive or negative depending on its value and the rock permeability. The comparison of divalent cations concentrations shows that the minimum adsorption of Ca2+ and maximum desorption of Mg2+ lead to maximum oil recovery of spontaneous imbibition. The results confirm that three cations of Ca2+, Mg2+, and Na+ are active for wettability alteration of carbonate rocks in the presence of sea water as initial water and diluted sea as imbibing fluid, whilst the amounts of potassium remain constant.http://link.springer.com/article/10.1007/s13202-018-0552-2EORLow-salinity water injectionCarbonate rocksSpontaneous imbibitionWater saturationCation exchange |
| spellingShingle | Mohammad Reza Zaeri Hamidreza Shahverdi Rohallah Hashemi Mohsen Mohammadi Impact of water saturation and cation concentrations on wettability alteration and oil recovery of carbonate rocks using low-salinity water Journal of Petroleum Exploration and Production Technology EOR Low-salinity water injection Carbonate rocks Spontaneous imbibition Water saturation Cation exchange |
| title | Impact of water saturation and cation concentrations on wettability alteration and oil recovery of carbonate rocks using low-salinity water |
| title_full | Impact of water saturation and cation concentrations on wettability alteration and oil recovery of carbonate rocks using low-salinity water |
| title_fullStr | Impact of water saturation and cation concentrations on wettability alteration and oil recovery of carbonate rocks using low-salinity water |
| title_full_unstemmed | Impact of water saturation and cation concentrations on wettability alteration and oil recovery of carbonate rocks using low-salinity water |
| title_short | Impact of water saturation and cation concentrations on wettability alteration and oil recovery of carbonate rocks using low-salinity water |
| title_sort | impact of water saturation and cation concentrations on wettability alteration and oil recovery of carbonate rocks using low salinity water |
| topic | EOR Low-salinity water injection Carbonate rocks Spontaneous imbibition Water saturation Cation exchange |
| url | http://link.springer.com/article/10.1007/s13202-018-0552-2 |
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