剩余静校正处理技术在神狐海域水合物识别中的应用

Application of Residual Static Correction Processing Technique on Identification of Gas Hydrate in Shenhu Survey Area

为了提高地震剖面上天然气水合物识别的可信度,以神狐海域天然气水合物钻探结果为基础,首次将剩余静校正处理技术应用于天然气水合物地震资料处理中。结果显示,在经过剩余静校正处理后的地震剖面上BSR特征清晰,反射能量强,极性反转明显。在此基础上,对比分析了过神狐海域2口水合物钻井的新老剖面品质,对比结果显示,不论是钻遇天然气水合物的SH3井,还是未钻遇天然气水合物的SH1井,经过剩余静校正处理后的新剖面成像精度得到了明显提高,剖面显示出的细微结构更加清晰,有利于天然气水合物的识别。因此,建议开展海域天然气水合物(尤其是扩散型水合物)的剩余静校正处理。

In order to increase the credibility of gas hydrate identification in seismic profiles,residual static correction processing technic is firstly applied to the seismic data-processing of gas hydrate based on the drilling results of gas hydrate in Shenhu Survey area.The result shows that BSR is clearer,reflected energy is stronger and polarity-reversal is more obvious in seismic profiles processed by residual static correction.On the basis of residual static correction processing,the profiles quality between new and old are compared and analyzed for the 2gas hydrate-drilling Wells of Shenhu Survey area.Result shows that no matter the SH3 Well which met gash hydrate,or the SH1 Well which did not discover gas hydrate,the imaging precision of new profiles has improved greatly,the microstructure showed by seismic profile is clearer,and identification of gas hydrate become more credible after the residual static correction processing.Therefore,it is suggested to carry out residual static correction processing technique on identification of gas hydrate,especially for the dispersed gas hydrate.