A Novel Model for Predicting the Well Production in High-Sulfur-Content Gas Reservoirs
High-content H2S gas reservoirs are important for natural gas extraction. However, the precipitation and deposition of elemental sulfur in high-sulfur-content gas reservoirs eventually lead to porosity and permeability damage, resulting in the low well productivity. Therefore, it is worth developing...
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| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2021-01-01
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| Series: | Geofluids |
| Online Access: | http://dx.doi.org/10.1155/2021/5529908 |
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| _version_ | 1832566313821667328 |
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| author | Chunmei Zou Xiaodong Wang Jinghong Hu Yang Lv Bo Fang Yuan Zhang |
| author_facet | Chunmei Zou Xiaodong Wang Jinghong Hu Yang Lv Bo Fang Yuan Zhang |
| author_sort | Chunmei Zou |
| collection | DOAJ |
| description | High-content H2S gas reservoirs are important for natural gas extraction. However, the precipitation and deposition of elemental sulfur in high-sulfur-content gas reservoirs eventually lead to porosity and permeability damage, resulting in the low well productivity. Therefore, it is worth developing an accurate production prediction model considering sulfur deposition for fractured horizontal wells. In this study, based on the partition model and transient percolation theory, a novel numerical model considering the damage of sulfur deposition with pressure change on reservoir porosity and permeability was first developed to predict the production from fractured horizontal wells in high-sulfur-content gas reservoirs. Then, it was validated by actual field data from a high-sulfur-content gas reservoir. After that, the influence of sulfur deposition on the production of fractured horizontal wells was revealed through theoretical calculations, and the effects of hydraulic fracture parameters on production were analyzed. The results show that elemental sulfur gradually deposits in the reservoir pores as the reservoir pressure decreases and the production time increases, which eventually leads to permeability damage and reduces reservoir productivity; this negative impact gradually increases over time. It is also shown that the production of fractured horizontal wells increases with an increase in the half-length, fracture conductivity, and fracture number. Compared with the fracture half-length, the fracture conductivity and fracture number have a greater influence on the production of a single well. The model can handle the influence of nonlinear parameters caused by sulfur deposition, which allows accurate calculations and provides guidance for the development of fractured horizontal wells in gas reservoirs with high sulfur content. |
| format | Article |
| id | doaj-art-fe785f9e3e684bcf89b767151c7acfd8 |
| institution | Kabale University |
| issn | 1468-8115 1468-8123 |
| language | English |
| publishDate | 2021-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Geofluids |
| spelling | doaj-art-fe785f9e3e684bcf89b767151c7acfd82025-02-03T01:04:36ZengWileyGeofluids1468-81151468-81232021-01-01202110.1155/2021/55299085529908A Novel Model for Predicting the Well Production in High-Sulfur-Content Gas ReservoirsChunmei Zou0Xiaodong Wang1Jinghong Hu2Yang Lv3Bo Fang4Yuan Zhang5Beijing Key Laboratory of Unconventional Natural Gas Geology Evaluation and Development Engineering, China University of Geosciences, Beijing, ChinaBeijing Key Laboratory of Unconventional Natural Gas Geology Evaluation and Development Engineering, China University of Geosciences, Beijing, ChinaBeijing Key Laboratory of Unconventional Natural Gas Geology Evaluation and Development Engineering, China University of Geosciences, Beijing, ChinaThe Fifth Gas Production Plant in Changqing Oilfield Company, Xi’an, Shanxi, ChinaBeijing Key Laboratory of Unconventional Natural Gas Geology Evaluation and Development Engineering, China University of Geosciences, Beijing, ChinaBeijing Key Laboratory of Unconventional Natural Gas Geology Evaluation and Development Engineering, China University of Geosciences, Beijing, ChinaHigh-content H2S gas reservoirs are important for natural gas extraction. However, the precipitation and deposition of elemental sulfur in high-sulfur-content gas reservoirs eventually lead to porosity and permeability damage, resulting in the low well productivity. Therefore, it is worth developing an accurate production prediction model considering sulfur deposition for fractured horizontal wells. In this study, based on the partition model and transient percolation theory, a novel numerical model considering the damage of sulfur deposition with pressure change on reservoir porosity and permeability was first developed to predict the production from fractured horizontal wells in high-sulfur-content gas reservoirs. Then, it was validated by actual field data from a high-sulfur-content gas reservoir. After that, the influence of sulfur deposition on the production of fractured horizontal wells was revealed through theoretical calculations, and the effects of hydraulic fracture parameters on production were analyzed. The results show that elemental sulfur gradually deposits in the reservoir pores as the reservoir pressure decreases and the production time increases, which eventually leads to permeability damage and reduces reservoir productivity; this negative impact gradually increases over time. It is also shown that the production of fractured horizontal wells increases with an increase in the half-length, fracture conductivity, and fracture number. Compared with the fracture half-length, the fracture conductivity and fracture number have a greater influence on the production of a single well. The model can handle the influence of nonlinear parameters caused by sulfur deposition, which allows accurate calculations and provides guidance for the development of fractured horizontal wells in gas reservoirs with high sulfur content.http://dx.doi.org/10.1155/2021/5529908 |
| spellingShingle | Chunmei Zou Xiaodong Wang Jinghong Hu Yang Lv Bo Fang Yuan Zhang A Novel Model for Predicting the Well Production in High-Sulfur-Content Gas Reservoirs Geofluids |
| title | A Novel Model for Predicting the Well Production in High-Sulfur-Content Gas Reservoirs |
| title_full | A Novel Model for Predicting the Well Production in High-Sulfur-Content Gas Reservoirs |
| title_fullStr | A Novel Model for Predicting the Well Production in High-Sulfur-Content Gas Reservoirs |
| title_full_unstemmed | A Novel Model for Predicting the Well Production in High-Sulfur-Content Gas Reservoirs |
| title_short | A Novel Model for Predicting the Well Production in High-Sulfur-Content Gas Reservoirs |
| title_sort | novel model for predicting the well production in high sulfur content gas reservoirs |
| url | http://dx.doi.org/10.1155/2021/5529908 |
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