Experimental Investigation and Numerical Simulation of Dynamic Characteristics for Multithermal Fluid-Assisted SAGD in Extraheavy Oil Reservoir
AbstractLoss of the vast majority of heat and steam is an unavoidable problem encountered during conventional steam-assisted gravity drainage (SAGD) in extraheavy oil reservoirs. The noncondensate gas coinjection technique of reducing energy consumption and enhancing oil recovery can...
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GeoScienceWorld
2021-07-01
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| Series: | Lithosphere |
| Online Access: | https://pubs.geoscienceworld.org/lithosphere/article/2021/Special%201/8369713/605917/Experimental-Investigation-and-Numerical |
| _version_ | 1811343066832830464 |
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| author | Zhenhua Xu Xiaokun Zhang Zhenyi Cao Pengcheng Liu Zhe Yuan Lanxiang Shi Botao Kang |
| author_facet | Zhenhua Xu Xiaokun Zhang Zhenyi Cao Pengcheng Liu Zhe Yuan Lanxiang Shi Botao Kang |
| author_sort | Zhenhua Xu |
| collection | DOAJ |
| description |
AbstractLoss of the vast majority of heat and steam is an unavoidable problem encountered during conventional steam-assisted gravity drainage (SAGD) in extraheavy oil reservoirs. The noncondensate gas coinjection technique of reducing energy consumption and enhancing oil recovery can effectively solve this problem. Aiming at extraheavy oil with a high initial viscosity, the influence of noncondensate gases in multithermal fluids on the physical parameters of extraheavy oil was experimentally studied; the production characteristics and mechanism of multithermal fluid-assisted SAGD were studied through numerical simulation. A comparative investigation of the conventional SAGD and multithermal fluid-assisted SAGD injection schemes was conducted. The characteristics and mechanism of the steam chamber during the production processes were analyzed. The results show that a steam-gas-oil system forms in the steam chamber in the case of multithermal fluids. The steam chamber can be partitioned into four zones, and the flow of the oil mainly occurs in the steam condensation zone and the oil drainage zone. The injected multithermal fluids increase the horizontal expansion of the steam chamber, while the dissolved carbon dioxide reduces the residual oil saturation. Moreover, the nitrogen injection significantly reduces the heat loss and increases the heat utilization for multithermal fluid-assisted SAGD in developing extraheavy oil reservoirs. |
| first_indexed | 2024-04-13T19:22:01Z |
| format | Article |
| id | doaj.art-122fe9cf947e4586a02fefa568f1d86b |
| institution | Directory Open Access Journal |
| issn | 1941-8264 1947-4253 |
| language | English |
| last_indexed | 2024-04-13T19:22:01Z |
| publishDate | 2021-07-01 |
| publisher | GeoScienceWorld |
| record_format | Article |
| series | Lithosphere |
| spelling | doaj.art-122fe9cf947e4586a02fefa568f1d86b2022-12-22T02:33:29ZengGeoScienceWorldLithosphere1941-82641947-42532021-07-012021Special 110.2113/2021/8369713Experimental Investigation and Numerical Simulation of Dynamic Characteristics for Multithermal Fluid-Assisted SAGD in Extraheavy Oil ReservoirZhenhua Xu0http://orcid.org/0000-0001-9271-5991Xiaokun Zhang1Zhenyi Cao2Pengcheng Liu3http://orcid.org/0000-0002-6110-1345Zhe Yuan4Lanxiang Shi5Botao Kang6School of Energy Resources China University of Geosciences Beijing 100083 China cug.edu.cnSchool of Energy Resources China University of Geosciences Beijing 100083 China cug.edu.cnDepartment of Oilfield Exploration & Development PetroChina Coalbed Methane Company Limited Linfen 041000 China petrochina.com.cnSchool of Energy Resources China University of Geosciences Beijing 100083 China cug.edu.cnGreat Wall Drilling Engineering Kunshan Company PetroChina Suzhou 215337 China petrochina.com.cnResearch Institute of Petroleum Exploration and Development PetroChina Beijing 100083 China petrochina.com.cnCNOOC Research Institute Co. Ltd. CNOOC Beijing 100028 China cnoocengineering.com AbstractLoss of the vast majority of heat and steam is an unavoidable problem encountered during conventional steam-assisted gravity drainage (SAGD) in extraheavy oil reservoirs. The noncondensate gas coinjection technique of reducing energy consumption and enhancing oil recovery can effectively solve this problem. Aiming at extraheavy oil with a high initial viscosity, the influence of noncondensate gases in multithermal fluids on the physical parameters of extraheavy oil was experimentally studied; the production characteristics and mechanism of multithermal fluid-assisted SAGD were studied through numerical simulation. A comparative investigation of the conventional SAGD and multithermal fluid-assisted SAGD injection schemes was conducted. The characteristics and mechanism of the steam chamber during the production processes were analyzed. The results show that a steam-gas-oil system forms in the steam chamber in the case of multithermal fluids. The steam chamber can be partitioned into four zones, and the flow of the oil mainly occurs in the steam condensation zone and the oil drainage zone. The injected multithermal fluids increase the horizontal expansion of the steam chamber, while the dissolved carbon dioxide reduces the residual oil saturation. Moreover, the nitrogen injection significantly reduces the heat loss and increases the heat utilization for multithermal fluid-assisted SAGD in developing extraheavy oil reservoirs.https://pubs.geoscienceworld.org/lithosphere/article/2021/Special%201/8369713/605917/Experimental-Investigation-and-Numerical |
| spellingShingle | Zhenhua Xu Xiaokun Zhang Zhenyi Cao Pengcheng Liu Zhe Yuan Lanxiang Shi Botao Kang Experimental Investigation and Numerical Simulation of Dynamic Characteristics for Multithermal Fluid-Assisted SAGD in Extraheavy Oil Reservoir Lithosphere |
| title | Experimental Investigation and Numerical Simulation of Dynamic Characteristics for Multithermal Fluid-Assisted SAGD in Extraheavy Oil Reservoir |
| title_full | Experimental Investigation and Numerical Simulation of Dynamic Characteristics for Multithermal Fluid-Assisted SAGD in Extraheavy Oil Reservoir |
| title_fullStr | Experimental Investigation and Numerical Simulation of Dynamic Characteristics for Multithermal Fluid-Assisted SAGD in Extraheavy Oil Reservoir |
| title_full_unstemmed | Experimental Investigation and Numerical Simulation of Dynamic Characteristics for Multithermal Fluid-Assisted SAGD in Extraheavy Oil Reservoir |
| title_short | Experimental Investigation and Numerical Simulation of Dynamic Characteristics for Multithermal Fluid-Assisted SAGD in Extraheavy Oil Reservoir |
| title_sort | experimental investigation and numerical simulation of dynamic characteristics for multithermal fluid assisted sagd in extraheavy oil reservoir |
| url | https://pubs.geoscienceworld.org/lithosphere/article/2021/Special%201/8369713/605917/Experimental-Investigation-and-Numerical |
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