Factors affecting the estimation of gas hydrate and free gas saturation
文献类型：期刊论文
| 作者 | Wang, XJ; Wu, SG; Liu, XW |
| 刊名 | CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION
 |
| 出版日期 | 2006-03-01 |
| 卷号 | 49期号:2页码:504-511 |
| 关键词 | Gas Hydrate And Free Gas Saturation Compressional Wave Velocity Quality Factor |
| ISSN号 | 0001-5733 |
| 文献子类 | Article |
| 英文摘要 | Attenuations of different types of gas hydrate cementation in fluid-saturated porous solids are discussed. The factors affecting estimation of gas hydrate and free gas saturation are analyzed. It is suggested that porosity of sediment, the P wave velocity model and methods of calculating elastic modulus are key factors in the estimation of gas hydrate and free gas saturations. Attenuation of gas hydrate-bearing sediment is closely related with the cementation types of gas hydrate. Negative anomalies of quality factors indicate that gas hydrate deposits away from grain as part of fluid. Positive anomalies of the quality factors indicate that gas hydrate contacts with solid and changes the elastic modulus of matrix. Low frequency velocity and high frequency velocity models are used to estimate gas hydrate and free gas saturation in the Blake Ridge area according to the well log data of the hole 995 in ODP leg 164. The gas hydrate saturation obtained by low frequency velocity is 10% similar to 20% of the pore space and free gas saturation is 0.5% similar to 1% of the pore space. The gas hydrate saturation obtained by high frequency velocity is 5% similar to 10% of the pore space and free gas saturation is 1% similar to 2% of the pore space.; Attenuations of different types of gas hydrate cementation in fluid-saturated porous solids are discussed. The factors affecting estimation of gas hydrate and free gas saturation are analyzed. It is suggested that porosity of sediment, the P wave velocity model and methods of calculating elastic modulus are key factors in the estimation of gas hydrate and free gas saturations. Attenuation of gas hydrate-bearing sediment is closely related with the cementation types of gas hydrate. Negative anomalies of quality factors indicate that gas hydrate deposits away from grain as part of fluid. Positive anomalies of the quality factors indicate that gas hydrate contacts with solid and changes the elastic modulus of matrix. Low frequency velocity and high frequency velocity models are used to estimate gas hydrate and free gas saturation in the Blake Ridge area according to the well log data of the hole 995 in ODP leg 164. The gas hydrate saturation obtained by low frequency velocity is 10% similar to 20% of the pore space and free gas saturation is 0.5% similar to 1% of the pore space. The gas hydrate saturation obtained by high frequency velocity is 5% similar to 10% of the pore space and free gas saturation is 1% similar to 2% of the pore space. |
| 学科主题 | Geochemistry & Geophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000236382000024 |
| 公开日期 | 2010-12-24 |
| 源URL | [http://ir.qdio.ac.cn/handle/337002/5137]  |
| 专题 | 海洋研究所_海洋地质与环境重点实验室 |
| 作者单位 | 1.Chinese Acad Sci, Inst Oceanol, Qingdao 266071, Peoples R China 2.Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China 3.China Univ Geosci, Sch Geophys & Geoinformat Syst, Beijing 100083, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wang, XJ,Wu, SG,Liu, XW. Factors affecting the estimation of gas hydrate and free gas saturation[J]. CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,2006,49(2):504-511. |
| APA | Wang, XJ,Wu, SG,&Liu, XW.(2006).Factors affecting the estimation of gas hydrate and free gas saturation.CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,49(2),504-511. |
| MLA | Wang, XJ,et al."Factors affecting the estimation of gas hydrate and free gas saturation".CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION 49.2(2006):504-511. |
入库方式： OAI收割
来源：海洋研究所
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