Experimental Study on the Effect of CO2 on Phase Behavior Characteristics of Condensate Gas Reservoir
In this paper, the DBR all-visible mercury-free high-temperature and high-pressure multifunctional formation fluid PVT analyzer developed and produced by Schlumberger company is used to conduct an experimental study on phase behavior characteristics of one offshore high CO2 condensate gas wells. The...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Hindawi Limited
2020-01-01
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| Series: | Journal of Chemistry |
| Online Access: | http://dx.doi.org/10.1155/2020/6041081 |
| _version_ | 1798033175929159680 |
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| author | Dali Hou Ying Jia Yunqing Shi Rui Zhao Hongming Tang Lei Sun |
| author_facet | Dali Hou Ying Jia Yunqing Shi Rui Zhao Hongming Tang Lei Sun |
| author_sort | Dali Hou |
| collection | DOAJ |
| description | In this paper, the DBR all-visible mercury-free high-temperature and high-pressure multifunctional formation fluid PVT analyzer developed and produced by Schlumberger company is used to conduct an experimental study on phase behavior characteristics of one offshore high CO2 condensate gas wells. The experiments include two-phase flash experiment, constant composition expansion experiment (CCE experiment), and constant volume depletion experiment (CVD experiment). Experimental results show that the higher the CO2 content in the condensate gas system, the higher the gas-oil ratio of condensate gas, the greater the density of condensate oil, the higher the dew point pressure of condensate gas, the greater the relative volume of condensate gas, the smaller the amount of retrograde condensate oil. And the higher the CO2 content in the condensate gas system, the phase diagram is shifted to the left and up, the critical point of the phase diagram is shifted to the lower left, the smaller the area of the two-phase envelope, the lighter the condensate gas system, the condensate oil recovery is higher. The above experimental results revealed that CO2 is well soluble with condensate gas, the expansion capacity of the condensate gas system was slightly enhanced, and because CO2 has a good extraction capacity, the light components of condensate gas were constantly extracted, the retrograde condensate rate of condensate oil decreases, and the maximum retrograde condensate volume also decreased. However, the condensate oil was produced along with the natural gas, and the higher the CO2 content, the stronger the extraction, the more condensate oil was produced. It is mainly because CO2 has the strong gasification and extraction capacity, on the one hand, the retrograde condensation of condensate gas was inhibited, and on the other hand, reverse evaporation of condensate oil was enhanced. The above experimental results indicate the law of the effect of CO2 on the phase behavior characteristics of condensate gas reservoirs, providing theoretical basis and guidance for the efficient development of condensate gas reservoirs at sea. |
| first_indexed | 2024-04-11T20:26:06Z |
| format | Article |
| id | doaj.art-7abd9f451d7c4560a8b982120e9a7e21 |
| institution | Directory Open Access Journal |
| issn | 2090-9063 2090-9071 |
| language | English |
| last_indexed | 2024-04-11T20:26:06Z |
| publishDate | 2020-01-01 |
| publisher | Hindawi Limited |
| record_format | Article |
| series | Journal of Chemistry |
| spelling | doaj.art-7abd9f451d7c4560a8b982120e9a7e212022-12-22T04:04:39ZengHindawi LimitedJournal of Chemistry2090-90632090-90712020-01-01202010.1155/2020/60410816041081Experimental Study on the Effect of CO2 on Phase Behavior Characteristics of Condensate Gas ReservoirDali Hou0Ying Jia1Yunqing Shi2Rui Zhao3Hongming Tang4Lei Sun5State Key Laboratory of Shale Oil and Gas Enrichment Mechanisms and Effective Development, Sinopec, Beijing 100083, ChinaState Key Laboratory of Shale Oil and Gas Enrichment Mechanisms and Effective Development, Sinopec, Beijing 100083, ChinaState Key Laboratory of Shale Oil and Gas Enrichment Mechanisms and Effective Development, Sinopec, Beijing 100083, ChinaState Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Chengdu University of Technology, Chengdu, Sichuan 610059, ChinaSchool of Geoscience and Technology, Southwest Petroleum University, Chengdu 610500, ChinaState Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu 610500, ChinaIn this paper, the DBR all-visible mercury-free high-temperature and high-pressure multifunctional formation fluid PVT analyzer developed and produced by Schlumberger company is used to conduct an experimental study on phase behavior characteristics of one offshore high CO2 condensate gas wells. The experiments include two-phase flash experiment, constant composition expansion experiment (CCE experiment), and constant volume depletion experiment (CVD experiment). Experimental results show that the higher the CO2 content in the condensate gas system, the higher the gas-oil ratio of condensate gas, the greater the density of condensate oil, the higher the dew point pressure of condensate gas, the greater the relative volume of condensate gas, the smaller the amount of retrograde condensate oil. And the higher the CO2 content in the condensate gas system, the phase diagram is shifted to the left and up, the critical point of the phase diagram is shifted to the lower left, the smaller the area of the two-phase envelope, the lighter the condensate gas system, the condensate oil recovery is higher. The above experimental results revealed that CO2 is well soluble with condensate gas, the expansion capacity of the condensate gas system was slightly enhanced, and because CO2 has a good extraction capacity, the light components of condensate gas were constantly extracted, the retrograde condensate rate of condensate oil decreases, and the maximum retrograde condensate volume also decreased. However, the condensate oil was produced along with the natural gas, and the higher the CO2 content, the stronger the extraction, the more condensate oil was produced. It is mainly because CO2 has the strong gasification and extraction capacity, on the one hand, the retrograde condensation of condensate gas was inhibited, and on the other hand, reverse evaporation of condensate oil was enhanced. The above experimental results indicate the law of the effect of CO2 on the phase behavior characteristics of condensate gas reservoirs, providing theoretical basis and guidance for the efficient development of condensate gas reservoirs at sea.http://dx.doi.org/10.1155/2020/6041081 |
| spellingShingle | Dali Hou Ying Jia Yunqing Shi Rui Zhao Hongming Tang Lei Sun Experimental Study on the Effect of CO2 on Phase Behavior Characteristics of Condensate Gas Reservoir Journal of Chemistry |
| title | Experimental Study on the Effect of CO2 on Phase Behavior Characteristics of Condensate Gas Reservoir |
| title_full | Experimental Study on the Effect of CO2 on Phase Behavior Characteristics of Condensate Gas Reservoir |
| title_fullStr | Experimental Study on the Effect of CO2 on Phase Behavior Characteristics of Condensate Gas Reservoir |
| title_full_unstemmed | Experimental Study on the Effect of CO2 on Phase Behavior Characteristics of Condensate Gas Reservoir |
| title_short | Experimental Study on the Effect of CO2 on Phase Behavior Characteristics of Condensate Gas Reservoir |
| title_sort | experimental study on the effect of co2 on phase behavior characteristics of condensate gas reservoir |
| url | http://dx.doi.org/10.1155/2020/6041081 |
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