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    • 8. 发明申请
    • POSITION DETERMINATION OF A SEISMIC SOURCE ARRAY
    • 地震源阵列的位置确定
    • WO2009150396A3
    • 2011-01-06
    • PCT/GB2009001165
    • 2009-05-12
    • GECO TECHNOLOGY BVSCHLUMBERGER CA LTDHOPPERSTAD JON-FREDRIK
    • HOPPERSTAD JON-FREDRIK
    • G01V1/38G01V1/02
    • G01V1/3861G01V1/006
    • A method of obtaining information about the positions of sources in a marine seismic source array, comprises: determining respective notional signatures for m selected seismic sources, where m n, where n is the number of sources of the array actuated to generate an output; and obtaining information about the travel between one of the m selected seismic sources and one of the n-m unselected seismic sources from the determined notional signatures. The m seismic sources are selected as sources whose positions, relative to one another, are expected to be close to their nominal positions. The effect of the n-m unselected seismic sources is ignored in the calculation of the nominal signatures for the m sources, and this gives rise to anomalies in the nominal signatures for the m sources. The determined travel time may be converted to a distance, so that information about the positions of the n-m unselected seismic sources may be obtained from the anomalies. Alternatively, the nominal signatures calculated for the m sources may be compared with notional signatures calculated for an estimate of the actual positions of the sources. The invention allows information about the actual geometry of the source array to be obtained from near-field measurements, so avoiding the need for a separate position-determining means.
    • 一种获取关于海洋地震源阵列中的源的位置的信息的方法,包括:确定m个所选地震源的相应名义特征,其中m n,其中n是致动以产生输出的阵列的源的数量; 以及从所确定的名义签名中获取关于m个选定的地震源中的一个和n-m个未选择的地震源中的一个之间的行进的信息。 选择m个地震源作为源,其位置相对于彼此预期接近其标称位置。 在m个源的名义特征的计算中忽略了n-m个未选择的地震源的影响,这引起了m个源的标称签名的异常。 所确定的行进时间可以被转换成一段距离,从而可以从异常获得关于n-m个未选择的地震源的位置的信息。 或者,可以将为m个源计算的名义签名与对源的实际位置的估计计算的名义签名进行比较。 本发明允许从近场测量获得关于源阵列的实际几何的信息,因此避免了对单独的位置确定装置的需要。