柴达木盆地三湖地区天然气地震预测关键技术及应用
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摘要
针对柴达木盆地三湖生物天然气预测,提出了地震预测方法的三项关键技术:地震资料处理中的静校正技术(初至波折射静校正技术);地震叠后预测技术(包括如下5项内容:共偏移距扫描;频率扫描;速度谱剖面分析;反射同相轴下拉量分析;烃类检测);地震叠前预测技术(包括如下2项内容:不同偏移距叠加剖面分析;叠前反演分析).在三湖北斜坡地区应用这三项关键技术,发现了台东2号含气异常,成功钻探了台东2井.
In order to predict gas reservoirs in the San Hu area of the Qaidam basin,three key techniques for seismic predicting gas reservoir are put forward in this paper. They are the static correction technique ( refraction static technique in limitation of tomographic inversion statics ) , technique of poststack seismic predicting gas reservoirs (there are five important points:offset scanning, frequency scanning, velocity spectrum profile analysis, pulling event down of seismic event analysis from shallow to deep layer caused from Low-velocity anomaly of shallow layer, predicting hydrocarbon) , and the technique of prestack seismic predicting gas reservoirs (there are two important points:analyzing poststack profile of different offset distance; prestack seismic inversion and analysis). Based on the three key techniques for seismic predicting gas reservoirs, Tai Dong No. 2 area is found successfully in the San Hu area ,and Tai Dong No. 2 well was drilled successfully which proved that the three key techniques of predicting gas reservoir are right.
In order to predict gas reservoirs in the San Hu area of the Qaidam basin,three key techniques for seismic predicting gas reservoir are put forward in this paper. They are the static correction technique ( refraction static technique in limitation of tomographic inversion statics ) , technique of poststack seismic predicting gas reservoirs (there are five important points:offset scanning, frequency scanning, velocity spectrum profile analysis, pulling event down of seismic event analysis from shallow to deep layer caused from Low-velocity anomaly of shallow layer, predicting hydrocarbon) , and the technique of prestack seismic predicting gas reservoirs (there are two important points:analyzing poststack profile of different offset distance; prestack seismic inversion and analysis). Based on the three key techniques for seismic predicting gas reservoirs, Tai Dong No. 2 area is found successfully in the San Hu area ,and Tai Dong No. 2 well was drilled successfully which proved that the three key techniques of predicting gas reservoir are right.
引文
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[2] 王西文.一种预测油气藏的地震微观解释方法[J].石油物探,1997,36(2) :39-49． Wang X X. Aseismic microscopic interpretation method for directly predicting hydrocarbon reservoirs [J]. Geophysical Prospecting for petroleum, 1997,36(2) :39-49．
[3] 王西文,岩性油气藏的储层预测及评价技术研究[J].石油物探.2004,43(6) :511-517． Wang X W. The prediction and evaluation of lithological reservoir[J]. Geophysical Prospecting for petroleum, 2004 , 43(6) :511-517．
[4] 王西文,等.地震数据连片处理中静校正建模方法的研究及应用[J].石油地球物理勘探,2006,41(4) :375-382．
[5] 王西文.提取地震信号中高频信息方法的若干问题[J].石油地球物理勘探,2006,41(1) :67-75． Wang X W. Several issues of methods for detecting high-frequency information of seismic signal [J]. Oil Geophysical Prospecting,2006,41(1) :67-75．
[6] 王西文,刘全新,吕焕通,等.相对保幅的地震资料连片处理方法研究[J].石油物探,2006,45(2) :105-120． Wang X W, Liu Q X,Lu H T,et al. Relative amplitude method to merging processing of 3-D seismic data from multi-area [J]. Geophysical Prospecting for petroleum,2006,45(2) : 105-120．
[7] 王西文,胡自多,田彦灿,等.地震子波处理的二步法反褶积方法研究[J].地球物理学进展,2006,21(4) :1167-1179． Wang X W, Hu Z D, Tian Y C, et al. Study of seismic wavelet processing method in two step deconvolution[J]. Progress in Geophysics, 2006 ,21(4) :1167-1179．
[8] 王西文,徐凤银,冯云发,等.三湖地区地震资料处理中的静校正方法研究[J].石油地球物理勘探,2007,42(5) :572-580． Wang X W, Xu F Y,Feng Y F,et al. Study on staic corrections of seismic data processing in Sanhu area [J]. Oil Geophysical Prospecting,2007,42(5) :572-580．
[9] 王西文,陈志勇,冯云发,等.柴达木盆地三湖地区生物天然气预测方法[J].石油物探,2007,46(5) :471-483． Wang Xi W, Chen Z Y,Fen Y F,et al. Method of predicting biogas in Sanhu area of Qaidam basin [J]. Geophysical Prospecting for petroleum,207 ,46(5) :471-483．
[10] 王西文.地震资料处理和解释中的小波分析方法[M].石油工业出版社,2004． Wang X W. An analysis method from wavelet transform in seismic data processing and interpretatiopn [M]. Beijing: Petroleum Industry Press,2004．
[11] 王西文,等.基于小波变换拟瞬时吸收系数的计算方法和应用[J].石油地球物理勘探,2002,37(增刊):205-209． Wang X W, et al. A method of calculating imitating absorbing-factor from wavelet transform[J]. Oil Geophysical Prospecting,2002, 37(sup): 205-209．
[12] 王西文,苏明军,徐尚成,等.叠前地震反演在柴达木盆地三湖地区天然气预测中的应用[J].石油地球物理勘探,2008,43(3) :300-307 Wang X W, Sun M J,Xu S C,et al. Application of prestack seismic inversion to predict natural gas in Sanhu area,Qaidam basin[J]. Oil Geophysical Prospecting, 2008, 43 (3) : 300-307．
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