Pre-stack seismic density inversion in marine shale reservoirs in the southern Jiaoshiba area, Sichuan Basin, China
投稿时间:2017-10-16  
英文关键词:Density inversion, Pseudo-P-impedance, Pure P-wave data, Regularization
基金项目:The authors thank the NSFC and Sinopec Joint Key Project (U1663207), the China Geology Survey Project (DD20160195), 973 Program (2014CB239104), National Key S&T Projects (2017ZX05049002) and China Postdoctoral Science Foundation for the financial support. We appreciate Exploration and Development Research Institution in the Jianghan Oilfield for providing the data.
作者单位
Yuan-Yin Zhang Oil and Gas Survey, China Geological Survey, Beijing 100083, China
State Key Laboratory of Shale Oil and Gas Enrichment Mechanisms and Effective Development, Beijing 100083, China
State Energy Center for Shale Oil Research and Development, Beijing 100083, China
Sinopec Key Laboratory of Shale Oil/Gas Exploration and Production Technology, Beijing 100083, China
Petroleum Exploration and Production Research Institute, Sinopec, Beijing 100083, China 
Zhi-Jun Jin State Key Laboratory of Shale Oil and Gas Enrichment Mechanisms and Effective Development, Beijing 100083, China
State Energy Center for Shale Oil Research and Development, Beijing 100083, China
Sinopec Key Laboratory of Shale Oil/Gas Exploration and Production Technology, Beijing 100083, China
Petroleum Exploration and Production Research Institute, Sinopec, Beijing 100083, China 
Ye-Quan Chen State Key Laboratory of Shale Oil and Gas Enrichment Mechanisms and Effective Development, Beijing 100083, China
State Energy Center for Shale Oil Research and Development, Beijing 100083, China
Sinopec Key Laboratory of Shale Oil/Gas Exploration and Production Technology, Beijing 100083, China
Petroleum Exploration and Production Research Institute, Sinopec, Beijing 100083, China 
Xi-Wu Liu State Key Laboratory of Shale Oil and Gas Enrichment Mechanisms and Effective Development, Beijing 100083, China
State Energy Center for Shale Oil Research and Development, Beijing 100083, China
Sinopec Key Laboratory of Shale Oil/Gas Exploration and Production Technology, Beijing 100083, China
Petroleum Exploration and Production Research Institute, Sinopec, Beijing 100083, China 
Lei Han State Key Laboratory of Shale Oil and Gas Enrichment Mechanisms and Effective Development, Beijing 100083, China
State Energy Center for Shale Oil Research and Development, Beijing 100083, China
Sinopec Key Laboratory of Shale Oil/Gas Exploration and Production Technology, Beijing 100083, China
Petroleum Exploration and Production Research Institute, Sinopec, Beijing 100083, China 
Wu-Jun Jin State Key Laboratory of Shale Oil and Gas Enrichment Mechanisms and Effective Development, Beijing 100083, China
State Energy Center for Shale Oil Research and Development, Beijing 100083, China
Sinopec Key Laboratory of Shale Oil/Gas Exploration and Production Technology, Beijing 100083, China
Petroleum Exploration and Production Research Institute, Sinopec, Beijing 100083, China 
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英文摘要:
      For a typical marine shale reservoir in the Jiaoshiba area, Sichuan Basin of China, P-impedance is sensitive for identifying lithology but not suitable for indicating good shale reservoirs. In comparison, density is an important quantity, which is sensitive for identifying the organic-rich mud shale from non-organic-rich mud shale. Due to the poor data quality and incidence angle range, density cannot be easily inverted by directly solving the ill-posed pre-stack seismic inversion in this area. Meanwhile, the traditional density regularizations implemented by directly using the more robust P-impedance inversion tend to be inaccurate for recovering density for this shale reservoir. In this paper, we combine the P-impedance and the minus uranium to construct the pseudo-P-impedance (PIp) at well locations. The PIp is observed to be sensitive for identifying organic-rich mud shale and has a good correlation with density in this area. We employ the PIp–density relation into the pre-stack inversion framework to estimate density. Three types of regularization are tested on both numerical and field data: These are no regularization, traditional regularization and the proposed approach. It is observed that the proposed method is better for recovering the density of organic-rich mud shale in the Jiaoshiba area.
Yuan-Yin Zhang,Zhi-Jun Jin,Ye-Quan Chen,Xi-Wu Liu,Lei Han,Wu-Jun Jin,2018.Pre-stack seismic density inversion in marine shale reservoirs in the southern Jiaoshiba area, Sichuan Basin, China.Petroleum Science,(3):484~497.
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