Volume fracturing of deep shale gas horizontal wells
Deep shale gas reservoirs buried underground with depth being more than 3500 m are characterized by high in-situ stress, large horizontal stress difference, complex distribution of bedding and natural cracks, and strong rock plasticity. Thus, during hydraulic fracturing, these reservoirs often revea...
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| Format: | Article |
| Language: | English |
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KeAi Communications Co., Ltd.
2017-03-01
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| Series: | Natural Gas Industry B |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2352854017300827 |
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| author | Tingxue Jiang Xiaobing Bian Haitao Wang Shuangming Li Changgui Jia Honglei Liu Haicheng Sun |
| author_facet | Tingxue Jiang Xiaobing Bian Haitao Wang Shuangming Li Changgui Jia Honglei Liu Haicheng Sun |
| author_sort | Tingxue Jiang |
| collection | DOAJ |
| description | Deep shale gas reservoirs buried underground with depth being more than 3500 m are characterized by high in-situ stress, large horizontal stress difference, complex distribution of bedding and natural cracks, and strong rock plasticity. Thus, during hydraulic fracturing, these reservoirs often reveal difficult fracture extension, low fracture complexity, low stimulated reservoir volume (SRV), low conductivity and fast decline, which hinder greatly the economic and effective development of deep shale gas. In this paper, a specific and feasible technique of volume fracturing of deep shale gas horizontal wells is presented. In addition to planar perforation, multi-scale fracturing, full-scale fracture filling, and control over extension of high-angle natural fractures, some supporting techniques are proposed, including multi-stage alternate injection (of acid fluid, slick water and gel) and the mixed- and small-grained proppant to be injected with variable viscosity and displacement. These techniques help to increase the effective stimulated reservoir volume (ESRV) for deep gas production. Some of the techniques have been successfully used in the fracturing of deep shale gas horizontal wells in Yongchuan, Weiyuan and southern Jiaoshiba blocks in the Sichuan Basin. As a result, Wells YY1HF and WY1HF yielded initially 14.1 × 104 m3/d and 17.5 × 104 m3/d after fracturing. The volume fracturing of deep shale gas horizontal well is meaningful in achieving the productivity of 50 × 108 m3 gas from the interval of 3500–4000 m in Phase II development of Fuling and also in commercial production of huge shale gas resources at a vertical depth of less than 6000 m. |
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| id | doaj.art-49d24b7cca73408cb7b2712c355c6c4a |
| institution | Directory Open Access Journal |
| issn | 2352-8540 |
| language | English |
| last_indexed | 2025-03-22T03:41:49Z |
| publishDate | 2017-03-01 |
| publisher | KeAi Communications Co., Ltd. |
| record_format | Article |
| series | Natural Gas Industry B |
| spelling | doaj.art-49d24b7cca73408cb7b2712c355c6c4a2024-04-28T11:59:38ZengKeAi Communications Co., Ltd.Natural Gas Industry B2352-85402017-03-014212713310.1016/j.ngib.2017.07.018Volume fracturing of deep shale gas horizontal wellsTingxue Jiang0Xiaobing Bian1Haitao Wang2Shuangming Li3Changgui Jia4Honglei Liu5Haicheng Sun6State Key Laboratory of Shale Oil and Gas Enrichment Mechanisms and Effective Development, Beijing 100101, ChinaState Key Laboratory of Shale Oil and Gas Enrichment Mechanisms and Effective Development, Beijing 100101, ChinaState Key Laboratory of Shale Oil and Gas Enrichment Mechanisms and Effective Development, Beijing 100101, ChinaState Key Laboratory of Shale Oil and Gas Enrichment Mechanisms and Effective Development, Beijing 100101, ChinaState Key Laboratory of Shale Oil and Gas Enrichment Mechanisms and Effective Development, Beijing 100101, ChinaState Key Laboratory of Shale Oil and Gas Enrichment Mechanisms and Effective Development, Beijing 100101, ChinaState Key Laboratory of Shale Oil and Gas Enrichment Mechanisms and Effective Development, Beijing 100101, ChinaDeep shale gas reservoirs buried underground with depth being more than 3500 m are characterized by high in-situ stress, large horizontal stress difference, complex distribution of bedding and natural cracks, and strong rock plasticity. Thus, during hydraulic fracturing, these reservoirs often reveal difficult fracture extension, low fracture complexity, low stimulated reservoir volume (SRV), low conductivity and fast decline, which hinder greatly the economic and effective development of deep shale gas. In this paper, a specific and feasible technique of volume fracturing of deep shale gas horizontal wells is presented. In addition to planar perforation, multi-scale fracturing, full-scale fracture filling, and control over extension of high-angle natural fractures, some supporting techniques are proposed, including multi-stage alternate injection (of acid fluid, slick water and gel) and the mixed- and small-grained proppant to be injected with variable viscosity and displacement. These techniques help to increase the effective stimulated reservoir volume (ESRV) for deep gas production. Some of the techniques have been successfully used in the fracturing of deep shale gas horizontal wells in Yongchuan, Weiyuan and southern Jiaoshiba blocks in the Sichuan Basin. As a result, Wells YY1HF and WY1HF yielded initially 14.1 × 104 m3/d and 17.5 × 104 m3/d after fracturing. The volume fracturing of deep shale gas horizontal well is meaningful in achieving the productivity of 50 × 108 m3 gas from the interval of 3500–4000 m in Phase II development of Fuling and also in commercial production of huge shale gas resources at a vertical depth of less than 6000 m.http://www.sciencedirect.com/science/article/pii/S2352854017300827Shale gasDeepHorizontal wellVolume fracturingPlanar perforationEffective fractureStimulated reservoir volume (SRV)Field application |
| spellingShingle | Tingxue Jiang Xiaobing Bian Haitao Wang Shuangming Li Changgui Jia Honglei Liu Haicheng Sun Volume fracturing of deep shale gas horizontal wells Natural Gas Industry B Shale gas Deep Horizontal well Volume fracturing Planar perforation Effective fracture Stimulated reservoir volume (SRV) Field application |
| title | Volume fracturing of deep shale gas horizontal wells |
| title_full | Volume fracturing of deep shale gas horizontal wells |
| title_fullStr | Volume fracturing of deep shale gas horizontal wells |
| title_full_unstemmed | Volume fracturing of deep shale gas horizontal wells |
| title_short | Volume fracturing of deep shale gas horizontal wells |
| title_sort | volume fracturing of deep shale gas horizontal wells |
| topic | Shale gas Deep Horizontal well Volume fracturing Planar perforation Effective fracture Stimulated reservoir volume (SRV) Field application |
| url | http://www.sciencedirect.com/science/article/pii/S2352854017300827 |
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