| Popis: |
For the investigation of gas hydrate in marine area E, this paper presents a comprehensive evaluation and technology scheme for seismic indicator and geochemical anomaly, combined with consideration of the geologic origin of gas hydrate. There are suitable geological conditions of origin, structure, deposit and geothermal temperature for forming deposit of gas hydrate in the research target area. Analysis of seismic BSR, AVO and BZ indicates that the conjunction of BSR and AVO analysis at the same time combined with forward modeling is important for the prediction of gas hydrate and free gas. In the favorable sections determined by geological and seismic methods, we extracted and analyzed the main content anomaly of gas hydrate, methane and other hydrocarbons, and then implemented the comprehensive research and evaluation of geological, seismic and geochemical survey. The key problems of comprehensive anomaly evaluation are the geological conditions of forming deposit, reasonable indicator of seismic BSR and AVO properties, and geochemical characteristics. The favorable sections evaluated and predicted by the comprehensive research are more reasonable and reliable. |
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