| Identification of interbedded gas hydrate and free gas using amplitude versus offset forward modelling | |
Liu, Bo1,2,3,4,5; Wang, Xiujuan2,3,6,11,12; Su, Pibo7,13; Li, Qingping8; Wan, Xiaoming9; Li, Jie ; Li, Yuanping10; Zhou, Jilin2,3,4,5; Jin, Jiapeng2,3; Sun, Luyi4,5
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| 2023-07-24 | |
| 发表期刊 | GEOPHYSICAL PROSPECTING
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| ISSN | 0016-8025 |
| 页码 | 17 |
| 通讯作者 | Wang, Xiujuan(wangxiujuan@ouc.edu.cn) ; Su, Pibo(spb_525@sina.com) |
| 摘要 | The complex contacts between gas hydrate and free gas have been confirmed by gas hydrate pilot production in the Pearl River Mouth Basin, South China Sea. The laminated clay silt reservoirs have high amplitude reflections which may be filled with different saturations of gas hydrates, free gas and the coexistence between gas hydrate and free gas. To distinguish the variations of amplitude reflections caused by different reservoirs properties below the bottom simulating reflection, we combine the forward modelling, pre-stack gathers with different incident angles and well log analysis to conduct the seismic responses. A number of geological models are established with variable saturations and different interfaces between gas hydrate and free gas. First, we analyse the seismic and well log responses at Sites W11, W01 and W17 near the production test area. Then, we perform the forward modelling to quantify the differences among seismic reflections with different saturations, thickness, incident angles and strata dips in free gas- or gas hydrate-bearing geological models. We extract the seismic amplitudes along the bottom simulating reflection and other layers to compare with the amplitudes generated from forward modelling. The results indicate that the inclined intervals below the bottom simulating reflection have high amplitude, continuous reflection and polarity reversal which may be caused by thin gas reservoir and the interlayered gas hydrate and free gas with different saturations. The top interfaces of the gas hydrate- and free gas-bearing layers show typical Class III amplitude versus offset and exhibit high amplitude reflections at seismic data with near, mid and far-incident angles, which are easy to distinguish. Seismic response of far-incident angle can be used to identify the coexistence of gas hydrate and free gas. |
| 关键词 | Compagnie Generale deGeophysique complex contact forward modelling free gas gas hydrate seismic response |
| DOI | 10.1111/1365-2478.13402 |
| 收录类别 | SCI |
| 语种 | 英语 |
| 资助项目 | National Natural Science Foundation of China[41976077] ; Open Fund of the Key Laboratory of Marine Geology and Environment, Chinese Academy of Sciences[MGE2021KG09] ; Guangdong Province Marine Economic Development (Six Major Marine Industries) Special Fund Project[2021] ; Guangdong Province Marine Economic Development (Six Major Marine Industries) Special Fund Project[58] ; National Key Ramp;D Program of China[2017YFC0307301-1] |
| WOS研究方向 | Geochemistry & Geophysics |
| WOS类目 | Geochemistry & Geophysics |
| WOS记录号 | WOS:001034078500001 |
| 出版者 | WILEY |
| WOS关键词 | WESTERN CONTINENTAL-MARGIN ; EASTERN NANKAI TROUGH ; RIVER MOUTH BASIN ; METHANE HYDRATE ; SHENHU AREA ; BEARING SEDIMENTS ; STABILITY ZONE ; DOWNHOLE LOG ; SEISMIC DATA ; CHINA |
| 引用统计 | |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://ir.qdio.ac.cn/handle/337002/182557 |
| 专题 | 海洋地质与环境重点实验室 |
| 通讯作者 | Wang, Xiujuan; Su, Pibo |
| 作者单位 | 1.Hebei Univ Engn, Sch Earth Sci & Engn, Handan, Peoples R China 2.Lab Marine Mineral Resources, Qingdao, Peoples R China 3.Deep Sea Multidisciplinary Res Ctr, Pilot Natl Lab Marine Sci & Technol Qingdao, Qingdao, Peoples R China 4.Chinese Acad Sci, Ctr Ocean Mega Sci, Qingdao, Peoples R China 5.Chinese Acad Sci, Key Lab Marine Geol & Environm, Qingdao, Peoples R China 6.Ocean Univ China, Frontiers Sci Ctr Deep Ocean Multispheres & Earth, Key Lab Submarine Geosci & Prospecting Tech, MOE & Coll Marine Geosci, Qingdao, Peoples R China 7.China Geol Survey, Sanya Inst South China Sea Geol, Acad South China Sea Geol Sci, Sanya, Peoples R China 8.CNOOC Res Inst Co Ltd, State Key Lab Nat Gas Hydrate, Beijing, Peoples R China 9.China Geol Survey, Haikou Marine Geol Survey Ctr, Haikou, Peoples R China 10.China Natl Offshore Oil Corp Ltd, Shenzhen Branch, Shenzhen, Peoples R China 11.Lab Marine Mineral Resources, Qingdao 266237, Peoples R China 12.Deep sea Multidisciplinary Res Ctr, Pilot Natl Lab Marine Sci & Technol Qingdao, Qingdao 266237, Peoples R China 13.China Geol Survey, Sanya Inst South China Sea Geol, Acad South China Sea Geol Sci, Sanya 572025, Peoples R China |
| 推荐引用方式 GB/T 7714 | Liu, Bo,Wang, Xiujuan,Su, Pibo,et al. Identification of interbedded gas hydrate and free gas using amplitude versus offset forward modelling[J]. GEOPHYSICAL PROSPECTING,2023:17. |
| APA | Liu, Bo.,Wang, Xiujuan.,Su, Pibo.,Li, Qingping.,Wan, Xiaoming.,...&Sun, Luyi.(2023).Identification of interbedded gas hydrate and free gas using amplitude versus offset forward modelling.GEOPHYSICAL PROSPECTING,17. |
| MLA | Liu, Bo,et al."Identification of interbedded gas hydrate and free gas using amplitude versus offset forward modelling".GEOPHYSICAL PROSPECTING (2023):17. |
| 条目包含的文件 | 条目无相关文件。 | |||||
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