Geochemistry of Formation Water and Implications for Ultradeep Tight Sandstone of DK Gas Field in Kuqa Depression
Formation water is produced during gas well production, which can seriously affect gas well productivity, especially in deep and ultradeep tight sandstone gas reservoirs. In this paper, we have studied the formation water production and geochemical properties of the ultradeep tight sandstone gas res...
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| Format: | Article |
| Language: | English |
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Wiley
2022-01-01
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| Series: | Geofluids |
| Online Access: | http://dx.doi.org/10.1155/2022/6514733 |
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| author | Xiaobo Guo Libin Zhao Wei Han Longfei Zhou Zhilong Huang Xiongwei Sun Xuejun Yang Tonghui Zhang Chenglin Zhang |
| author_facet | Xiaobo Guo Libin Zhao Wei Han Longfei Zhou Zhilong Huang Xiongwei Sun Xuejun Yang Tonghui Zhang Chenglin Zhang |
| author_sort | Xiaobo Guo |
| collection | DOAJ |
| description | Formation water is produced during gas well production, which can seriously affect gas well productivity, especially in deep and ultradeep tight sandstone gas reservoirs. In this paper, we have studied the formation water production and geochemical properties of the ultradeep tight sandstone gas reservoir in the Cretaceous Bashijiqike Formation of the DK gas field in the Kuqa Depression. The results indicate that the formation water can be classified as condensate water, gas-water transition zone water, mixed water, and isolated formation water, all of which are acidic and of CaCl2 type, with increasing salinity or chloride ion content. Sodium/chloride ratio (ρNa+/ρCl-), metamorphic coefficient (ρ(Cl--Na+)/ρ(Mg2+)), desulfurization coefficient (100×ρSO42−/ρCl−), and trace elements concentration parameters show that the formation water was formed in a closed and reductive environment and experienced strong water-rock interaction. The formation water may have been influenced by early seawater, but it is not significant and is more likely to have been influenced by water seepage from the overlying gypsum strata. The Sr, H, and O isotopes reveal that the different types of formation water have good homology and are not affected by atmospheric precipitation, which is propitious to the preservation of natural gas. |
| format | Article |
| id | doaj-art-efdfda4a09f3452a8ea1f7d6c5e1fac7 |
| institution | Kabale University |
| issn | 1468-8123 |
| language | English |
| publishDate | 2022-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Geofluids |
| spelling | doaj-art-efdfda4a09f3452a8ea1f7d6c5e1fac72025-02-03T05:57:55ZengWileyGeofluids1468-81232022-01-01202210.1155/2022/6514733Geochemistry of Formation Water and Implications for Ultradeep Tight Sandstone of DK Gas Field in Kuqa DepressionXiaobo Guo0Libin Zhao1Wei Han2Longfei Zhou3Zhilong Huang4Xiongwei Sun5Xuejun Yang6Tonghui Zhang7Chenglin Zhang8School of Earth Sciences and EngineeringResearch Institute of Exploration and DevelopmentSinopec Chongqing Fuling Shale Gas Exploration and Development Co LtdSchool of Earth Sciences and EngineeringState Key Laboratory of Petroleum Resource and ProspectingResearch Institute of Exploration and DevelopmentResearch Institute of Exploration and DevelopmentResearch Institute of Exploration and DevelopmentShale Gas Institute of PetroChina Southwest Oil & Gasfield CompanyFormation water is produced during gas well production, which can seriously affect gas well productivity, especially in deep and ultradeep tight sandstone gas reservoirs. In this paper, we have studied the formation water production and geochemical properties of the ultradeep tight sandstone gas reservoir in the Cretaceous Bashijiqike Formation of the DK gas field in the Kuqa Depression. The results indicate that the formation water can be classified as condensate water, gas-water transition zone water, mixed water, and isolated formation water, all of which are acidic and of CaCl2 type, with increasing salinity or chloride ion content. Sodium/chloride ratio (ρNa+/ρCl-), metamorphic coefficient (ρ(Cl--Na+)/ρ(Mg2+)), desulfurization coefficient (100×ρSO42−/ρCl−), and trace elements concentration parameters show that the formation water was formed in a closed and reductive environment and experienced strong water-rock interaction. The formation water may have been influenced by early seawater, but it is not significant and is more likely to have been influenced by water seepage from the overlying gypsum strata. The Sr, H, and O isotopes reveal that the different types of formation water have good homology and are not affected by atmospheric precipitation, which is propitious to the preservation of natural gas.http://dx.doi.org/10.1155/2022/6514733 |
| spellingShingle | Xiaobo Guo Libin Zhao Wei Han Longfei Zhou Zhilong Huang Xiongwei Sun Xuejun Yang Tonghui Zhang Chenglin Zhang Geochemistry of Formation Water and Implications for Ultradeep Tight Sandstone of DK Gas Field in Kuqa Depression Geofluids |
| title | Geochemistry of Formation Water and Implications for Ultradeep Tight Sandstone of DK Gas Field in Kuqa Depression |
| title_full | Geochemistry of Formation Water and Implications for Ultradeep Tight Sandstone of DK Gas Field in Kuqa Depression |
| title_fullStr | Geochemistry of Formation Water and Implications for Ultradeep Tight Sandstone of DK Gas Field in Kuqa Depression |
| title_full_unstemmed | Geochemistry of Formation Water and Implications for Ultradeep Tight Sandstone of DK Gas Field in Kuqa Depression |
| title_short | Geochemistry of Formation Water and Implications for Ultradeep Tight Sandstone of DK Gas Field in Kuqa Depression |
| title_sort | geochemistry of formation water and implications for ultradeep tight sandstone of dk gas field in kuqa depression |
| url | http://dx.doi.org/10.1155/2022/6514733 |
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