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02a0033212;¥1194.00;20011205d1998 ekmy;eng;a z 000yy;r;Evaluation of seismic amplitude versus offset techniques for the direct detection of gas reservoirs;phase II;increasing the use of amplitude versus offset techniques in the continental united states: final report;prep. by John P. Castagna ... et al;Chicago, IL;Gas Research Institute;1998;vii, 115, (52) p.;ill.;1 disc CD-ROM(call no. : CD0347);Gas Research Institute;GRI-98/0120;GRI contract no.: 5097-212-2050;直接探测天然气储层的地震振幅与偏移技术评估, 第2阶段;Seismic detection ; Seismic migration ; Amplitude ; Offset;a631;Castagna;John P.;101;EB00061208;631;C27;r¥1194.00;a07;b1