Anisotropic analysis and saturation estimation of gas hydrate filled in fractures: a case of site NGHP01-10D, offshore eastern India
文献类型：期刊论文
| 作者 | Wang Ji-Liang1,2,3 ; Wang Xiu-Juan1; Qian Jin1; Wu Shi-Guo1; Wang, JL
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| 刊名 | CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION
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| 出版日期 | 2013-04-01 |
| 卷号 | 56期号:4页码:1312-1320 |
| ISSN号 | 0001-5733 |
| 关键词 | Gas hydrate Fracture Saturation Anisotropic India |
| 通讯作者 | Wang, JL |
| 中文摘要 | Gas hydrate filled in fractures was the important occurrence morphology in fine-grained sediments from deep basin of India. Gas hydrate existed as solid nodules and subhorizontal veins filled in high angle fractures. Gas hydrate was formed along the tectonic principal stress. Gas hydrate filled in fractured reservoir shows anisotropic properties. Gas hydrate saturation estimated from NGHP01-10D was about 40% of the pore space using isotropic velocity model. However, gas hydrate saturation estimated from pressure cores was about 20% of the pore space. To reconcile the difference, an anisotropic model based on laminated media was used to estimate gas hydrate saturation in fractured reservoir. In vertical borehole, the incident angles of wave propagation have a relation with fracture dip angles. Gas hydrate saturations and fracture dip angles can be estimated from both P-wave and S-wave velocities obtained from the logging data. Gas hydrate saturations estimated from NGHP01-10D vary from 15% to 25% of the pore space using anisotropic velocities for laminated media. The fractures are high angle fractures and the dip angles vary from 60 to 90 degrees. The saturations estimated using the new method fit the results estimated from pressure core gassing well. |
| 英文摘要 | Gas hydrate filled in fractures was the important occurrence morphology in fine-grained sediments from deep basin of India. Gas hydrate existed as solid nodules and subhorizontal veins filled in high angle fractures. Gas hydrate was formed along the tectonic principal stress. Gas hydrate filled in fractured reservoir shows anisotropic properties. Gas hydrate saturation estimated from NGHP01-10D was about 40% of the pore space using isotropic velocity model. However, gas hydrate saturation estimated from pressure cores was about 20% of the pore space. To reconcile the difference, an anisotropic model based on laminated media was used to estimate gas hydrate saturation in fractured reservoir. In vertical borehole, the incident angles of wave propagation have a relation with fracture dip angles. Gas hydrate saturations and fracture dip angles can be estimated from both P-wave and S-wave velocities obtained from the logging data. Gas hydrate saturations estimated from NGHP01-10D vary from 15% to 25% of the pore space using anisotropic velocities for laminated media. The fractures are high angle fractures and the dip angles vary from 60 to 90 degrees. The saturations estimated using the new method fit the results estimated from pressure core gassing well. |
| 学科主题 | Geochemistry & Geophysics |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 类目[WOS] | Geochemistry & Geophysics |
| 研究领域[WOS] | Geochemistry & Geophysics |
| 关键词[WOS] | WAVE VELOCITY ; ATTENUATION |
| 收录类别 | SCI |
| 原文出处 | 10.6038/cjg20130425 |
| 语种 | 英语 |
| WOS记录号 | WOS:000318456900025 |
| 公开日期 | 2014-07-17 |
| 源URL | [http://ir.qdio.ac.cn/handle/337002/16285]  |
| 专题 | 海洋研究所_海洋地质与环境重点实验室 |
| 通讯作者 | Wang, JL |
| 作者单位 | 1.Chinese Acad Sci, Inst Oceanol, Key Lab Marine Geol & Environm, Qingdao 266071, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Minist Land & Resources MRE201105, Key Lab Marine Hydrocarbon Resources & Environm G, Qingdao 266071, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wang Ji-Liang,Wang Xiu-Juan,Qian Jin,et al. Anisotropic analysis and saturation estimation of gas hydrate filled in fractures: a case of site NGHP01-10D, offshore eastern India[J]. CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,2013,56(4):1312-1320. |
| APA | Wang Ji-Liang,Wang Xiu-Juan,Qian Jin,Wu Shi-Guo,&Wang, JL.(2013).Anisotropic analysis and saturation estimation of gas hydrate filled in fractures: a case of site NGHP01-10D, offshore eastern India.CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,56(4),1312-1320. |
| MLA | Wang Ji-Liang,et al."Anisotropic analysis and saturation estimation of gas hydrate filled in fractures: a case of site NGHP01-10D, offshore eastern India".CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION 56.4(2013):1312-1320. |
入库方式： OAI收割
来源：海洋研究所
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