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| Key technology of seismic acquisition of gas hydrate in Mohe permafrost area |
| GE Zhi-Guang1, CHEN Yong-Sheng1, ZHOU Xiao-Xian2 |
1.Deyichengli Environmental Engineering and Technology Limited Liability Company of Beijing,Beijing 100081,China;
2.Beijing Explo-Tech Engineering Co.,Ltd.,Beijing 100192,China |
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Abstract The exploration research on gas hydrate resources in permafrost areas has aroused much attention due to its huge potential resource value.Although the seismic exploration technology of marine gas hydrates is almost mature,the seismic exploration technology of gas hydrate in terrestrial permafrost area is still in the research phase,and there are still many problems in data acquisition,processing and interpretation. In this paper,the authors carried out the research on the seismic acquisition technology of gas hydrate in terrestrial permafrost area in China,conducted a comprehensive analysis and established a geological model of the study area on the basis of geological and geophysical data obtained in Mohe permafrost area.To tackle the exploration difficulties of the thin permafrost layer and deep complex structures,the authors conducted forward modeling based on the wave equation.Meanwhile,through a comparative analysis of the collected data,the authors put forward the data acquisition method of alternate blasting of small interval and shallow shots, small shots and moderate shots,which will acquire shallow-,middle-level and deep high SNR data for reservoir prediction and structure detection.
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Received: 14 March 2017
Published: 03 April 2018
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