The Influential Factors and Characteristics of Tight Sandstone Gas Reservoir: A Case Study in Ordos Basin in China
To analyze the impact of the factors on physical properties and the mechanism of tightness as well as favorable accumulation space of tight sandstone reservoir, comprehensive analysis is conducted using various kinds of experiments. The results show that the predominant rock type is medium-coarse gr...
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| Format: | Article |
| Language: | English |
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Wiley
2020-01-01
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| Series: | Geofluids |
| Online Access: | http://dx.doi.org/10.1155/2020/6690043 |
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| author | Dazhong Ren Fu Yang Rongxi Li Yuhong Li Dengke Liu |
| author_facet | Dazhong Ren Fu Yang Rongxi Li Yuhong Li Dengke Liu |
| author_sort | Dazhong Ren |
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| description | To analyze the impact of the factors on physical properties and the mechanism of tightness as well as favorable accumulation space of tight sandstone reservoir, comprehensive analysis is conducted using various kinds of experiments. The results show that the predominant rock type is medium-coarse grained lithic quartzarenite, and the main accumulating space is the dissolved secondary pores. Reservoir pore-throat structures can be divided into four categories. Based on morphologies and parameters which derived from capillary pressure curves, the physical properties rank in the following descending sequence: Type I>Type II>Type III>Type IV. The reservoir quality is influenced by both sedimentation and diagenesis synthetically. The underwater distributary channel is the dominant space for favorable reservoir. Compaction and cementation play dominant roles in the reduction of permeability. The loss of primary pores caused by both those diagenesis are 20.52% and 16.91%, respectively. Secondary pores formed by dissolution improve the reservoir quality by increase the porosity (2.68%). This suggests that weak diagenesis greatly contributes to the improvement of reservoir quality. |
| format | Article |
| id | doaj-art-c30f1531461d4b3aa3c7c1d49ff79db6 |
| institution | DOAJ |
| issn | 1468-8115 1468-8123 |
| language | English |
| publishDate | 2020-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Geofluids |
| spelling | doaj-art-c30f1531461d4b3aa3c7c1d49ff79db62025-08-20T03:23:15ZengWileyGeofluids1468-81151468-81232020-01-01202010.1155/2020/66900436690043The Influential Factors and Characteristics of Tight Sandstone Gas Reservoir: A Case Study in Ordos Basin in ChinaDazhong Ren0Fu Yang1Rongxi Li2Yuhong Li3Dengke Liu4Xi’an Geological Survey Center, China Geological Survey, Xi’an 710054, ChinaKey Laboratory of Coal Resources Exploration and Comprehensive Utilization Ministry of Land and Resources, Xi’an, Shaanxi 710021, ChinaSchool of Earth Science and Resources, Chang’an University, Xi’an 710054, ChinaXi’an Geological Survey Center, China Geological Survey, Xi’an 710054, ChinaKey Laboratory of Coal Resources Exploration and Comprehensive Utilization Ministry of Land and Resources, Xi’an, Shaanxi 710021, ChinaTo analyze the impact of the factors on physical properties and the mechanism of tightness as well as favorable accumulation space of tight sandstone reservoir, comprehensive analysis is conducted using various kinds of experiments. The results show that the predominant rock type is medium-coarse grained lithic quartzarenite, and the main accumulating space is the dissolved secondary pores. Reservoir pore-throat structures can be divided into four categories. Based on morphologies and parameters which derived from capillary pressure curves, the physical properties rank in the following descending sequence: Type I>Type II>Type III>Type IV. The reservoir quality is influenced by both sedimentation and diagenesis synthetically. The underwater distributary channel is the dominant space for favorable reservoir. Compaction and cementation play dominant roles in the reduction of permeability. The loss of primary pores caused by both those diagenesis are 20.52% and 16.91%, respectively. Secondary pores formed by dissolution improve the reservoir quality by increase the porosity (2.68%). This suggests that weak diagenesis greatly contributes to the improvement of reservoir quality.http://dx.doi.org/10.1155/2020/6690043 |
| spellingShingle | Dazhong Ren Fu Yang Rongxi Li Yuhong Li Dengke Liu The Influential Factors and Characteristics of Tight Sandstone Gas Reservoir: A Case Study in Ordos Basin in China Geofluids |
| title | The Influential Factors and Characteristics of Tight Sandstone Gas Reservoir: A Case Study in Ordos Basin in China |
| title_full | The Influential Factors and Characteristics of Tight Sandstone Gas Reservoir: A Case Study in Ordos Basin in China |
| title_fullStr | The Influential Factors and Characteristics of Tight Sandstone Gas Reservoir: A Case Study in Ordos Basin in China |
| title_full_unstemmed | The Influential Factors and Characteristics of Tight Sandstone Gas Reservoir: A Case Study in Ordos Basin in China |
| title_short | The Influential Factors and Characteristics of Tight Sandstone Gas Reservoir: A Case Study in Ordos Basin in China |
| title_sort | influential factors and characteristics of tight sandstone gas reservoir a case study in ordos basin in china |
| url | http://dx.doi.org/10.1155/2020/6690043 |
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