Optimization of production system of shale oil development in Ordos basin, China
Abstract In this paper, production system (PS) of shale oil is optimized according to production data and indoor experiments, including core and fluid tests. Results showed that: ① Pressure drop rate at wellhead is a reasonable reference for the determination of post-fracture shut-in duration (PFSID...
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Nature Portfolio
2023-04-01
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| Series: | Scientific Reports |
| Online Access: | https://doi.org/10.1038/s41598-023-33080-8 |
| _version_ | 1797841069147160576 |
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| author | Xiaolong Wan Shuwei Ma Jianming Fan Yuanli Zhang Chao Zhang |
| author_facet | Xiaolong Wan Shuwei Ma Jianming Fan Yuanli Zhang Chao Zhang |
| author_sort | Xiaolong Wan |
| collection | DOAJ |
| description | Abstract In this paper, production system (PS) of shale oil is optimized according to production data and indoor experiments, including core and fluid tests. Results showed that: ① Pressure drop rate at wellhead is a reasonable reference for the determination of post-fracture shut-in duration (PFSID). When pressure at a wellhead of horizontal well is relatively stable and the pressure drop less than 0.1 MPa per day for three consecutive days, PFSID ends; ② Flowback intensity of fracturing fluid affects the effectiveness of proppant underground, thus flowback intensity can be determined by the critical flow rate and safety factor of each proppant; ③ Flowback intensity should be varied during different development stages, which could be divided into four according to production gas and oil ratio(GOR) of a shale oil horizontal well: low, medium–high, high and high-low production GOR. During the stage of low production GOR, ratio of flow pressure and saturation pressure should be maintained greater than 1.0, and the initial daily liquid productivity for a hundred-meter oil-bearing lateral length in a horizontal well is 2.4 ~ 2.9 m3/d; and during the medium–high production GOR, high production GOR and high-low production GOR stages, the responding initial daily liquid productivity should be maintained between 0.8 ~ 1.0 or less than 0.8 respectively. |
| first_indexed | 2024-04-09T16:25:04Z |
| format | Article |
| id | doaj.art-49ca8fc01b4846a5ab302f795d4543d0 |
| institution | Directory Open Access Journal |
| issn | 2045-2322 |
| language | English |
| last_indexed | 2024-04-09T16:25:04Z |
| publishDate | 2023-04-01 |
| publisher | Nature Portfolio |
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| series | Scientific Reports |
| spelling | doaj.art-49ca8fc01b4846a5ab302f795d4543d02023-04-23T11:13:26ZengNature PortfolioScientific Reports2045-23222023-04-0113111010.1038/s41598-023-33080-8Optimization of production system of shale oil development in Ordos basin, ChinaXiaolong Wan0Shuwei Ma1Jianming Fan2Yuanli Zhang3Chao Zhang4College of Geosciences, China University of Petroleum (Beijing)Research Institute of Exploration and Development, PetroChina Changqing Oilfield CompanyPetroChina Changqing Oilfield CompanyResearch Institute of Exploration and Development, PetroChina Changqing Oilfield CompanyResearch Institute of Exploration and Development, PetroChina Changqing Oilfield CompanyAbstract In this paper, production system (PS) of shale oil is optimized according to production data and indoor experiments, including core and fluid tests. Results showed that: ① Pressure drop rate at wellhead is a reasonable reference for the determination of post-fracture shut-in duration (PFSID). When pressure at a wellhead of horizontal well is relatively stable and the pressure drop less than 0.1 MPa per day for three consecutive days, PFSID ends; ② Flowback intensity of fracturing fluid affects the effectiveness of proppant underground, thus flowback intensity can be determined by the critical flow rate and safety factor of each proppant; ③ Flowback intensity should be varied during different development stages, which could be divided into four according to production gas and oil ratio(GOR) of a shale oil horizontal well: low, medium–high, high and high-low production GOR. During the stage of low production GOR, ratio of flow pressure and saturation pressure should be maintained greater than 1.0, and the initial daily liquid productivity for a hundred-meter oil-bearing lateral length in a horizontal well is 2.4 ~ 2.9 m3/d; and during the medium–high production GOR, high production GOR and high-low production GOR stages, the responding initial daily liquid productivity should be maintained between 0.8 ~ 1.0 or less than 0.8 respectively.https://doi.org/10.1038/s41598-023-33080-8 |
| spellingShingle | Xiaolong Wan Shuwei Ma Jianming Fan Yuanli Zhang Chao Zhang Optimization of production system of shale oil development in Ordos basin, China Scientific Reports |
| title | Optimization of production system of shale oil development in Ordos basin, China |
| title_full | Optimization of production system of shale oil development in Ordos basin, China |
| title_fullStr | Optimization of production system of shale oil development in Ordos basin, China |
| title_full_unstemmed | Optimization of production system of shale oil development in Ordos basin, China |
| title_short | Optimization of production system of shale oil development in Ordos basin, China |
| title_sort | optimization of production system of shale oil development in ordos basin china |
| url | https://doi.org/10.1038/s41598-023-33080-8 |
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