地震属性在煤层厚度预测上的分析与应用
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摘要
地震勘探中,地震反射波中包含着丰富的信息,煤层厚度与地震反射波的各种属性之间存在着一定的相关性。通过对楔状煤层模型的地震属性分析,得出煤层厚度与反射波振幅及煤层顶底的反射波视时差都存在一定关系。当煤层厚度在调谐厚度以内时,振幅和煤层厚度成正比关系,而视时差与煤层厚度关系则不明显。当煤层厚度大于调谐厚度时,振幅和煤层厚度不明显,而视时差则与煤层厚度线性关系。因此单独用任一属性都难以准确预测煤层厚度。通过对煤层厚度及两种地震属性进行非线性回归分析,找出整合多种地震属性对煤层厚度进行预测的方法。并结合实际矿区的资料,用该方法对全区煤层厚度进行预测,取得了较好的结果。
Seismic wave contain more information about the sediments.The seismic attributes has some relationship with the coal seam thickness.Through analysis of the wedge-shaped coal seam's seismic attributes,when the seam thickness is less than the tuning thickness,there is proportional relationship between the amplitude value and seam thickness;while the apparent time difference between the wave peak and trough is not sensitive.When the coal seam thickness is above the tuning thickness,the conclusion is opposite.As a result,it's difficult to predict the coal seam thickness only by using one single attribute.Therefore,the nonlinear-regression method is used to analyze the relationship between the seam thickness and both attributes,and got a method to predict the coal seam thickness.With the method the coal seam thickness in a coal mine is predicted and got a perfect result.
Seismic wave contain more information about the sediments.The seismic attributes has some relationship with the coal seam thickness.Through analysis of the wedge-shaped coal seam's seismic attributes,when the seam thickness is less than the tuning thickness,there is proportional relationship between the amplitude value and seam thickness;while the apparent time difference between the wave peak and trough is not sensitive.When the coal seam thickness is above the tuning thickness,the conclusion is opposite.As a result,it's difficult to predict the coal seam thickness only by using one single attribute.Therefore,the nonlinear-regression method is used to analyze the relationship between the seam thickness and both attributes,and got a method to predict the coal seam thickness.With the method the coal seam thickness in a coal mine is predicted and got a perfect result.
引文
1 Peng Suping,Gao Yunfeng.Study on the AVO forward modeling ofcoal bearing strata.Chinese Science Bulletin,2005;50:151—158
2崔若飞,仲其涛,李晋平.利用地震资料进行煤层厚度解释预测.煤田地质与勘探,2002;3(30):54—57
3许崇宝,刘东源.小波边缘分析建模波阻抗反演方法在煤层解释中的应用.中国煤炭地质,2008;2(20):43—45
4许崇宝.测井约束地震反演分辨率及反演策略探讨.中国煤炭地质,2010;8(22):39—41
5李红,吕进英,王宏友.波阻抗约束反演技术预测煤层厚度.煤田地质与勘探,2007;1(35):74—77
6张玉忠,杨永波.运用地震属性技术预测煤层厚度.煤炭技术,2009;3(28):126—128
7郭彦省,孟召平,杨瑞昭,等.地震属性及其在煤层厚度预测中的应用.中国矿业大学学报,2004;5(33):557—562
8胡宗正,郭良红,林建东.三维地震属性参数在煤层厚度预测中的应用.中国煤炭地质,2008;6(20):56—58
9 Chen Q,Sidney S.Seismic attribute technology for reservoir forecas-ting and monitoring.The Leading Edge,1997;16(5):445—450
10董守华,马彦良,周明.煤层厚度与振幅、频率地震属性的正演模拟.中国矿业大学学报,2004;1.1(33):29—33
11 De Vooge N,Rooijen H.Thin layer response and spectral band-width.Geophysics,1983;48(1):12—18
12 Knapp R W.Vertical resolution of thick beds,and thin-bed cy-clothems.Geophysics,1990;55(6):1184—1191
13黄真萍,王晓华,王云专.薄层地震属性参数分析和厚度预测.石油物探,1997;9.3(36):28—38
14刘建华,刘天放,李德春.薄层厚度定量解释研究.物探与化探,1997;1(27):23—27
15彭苏萍,高云峰,彭晓波,等.淮南煤田含煤地层岩石物性参数研究.煤炭学报,2004;2(29):177—181
2崔若飞,仲其涛,李晋平.利用地震资料进行煤层厚度解释预测.煤田地质与勘探,2002;3(30):54—57
3许崇宝,刘东源.小波边缘分析建模波阻抗反演方法在煤层解释中的应用.中国煤炭地质,2008;2(20):43—45
4许崇宝.测井约束地震反演分辨率及反演策略探讨.中国煤炭地质,2010;8(22):39—41
5李红,吕进英,王宏友.波阻抗约束反演技术预测煤层厚度.煤田地质与勘探,2007;1(35):74—77
6张玉忠,杨永波.运用地震属性技术预测煤层厚度.煤炭技术,2009;3(28):126—128
7郭彦省,孟召平,杨瑞昭,等.地震属性及其在煤层厚度预测中的应用.中国矿业大学学报,2004;5(33):557—562
8胡宗正,郭良红,林建东.三维地震属性参数在煤层厚度预测中的应用.中国煤炭地质,2008;6(20):56—58
9 Chen Q,Sidney S.Seismic attribute technology for reservoir forecas-ting and monitoring.The Leading Edge,1997;16(5):445—450
10董守华,马彦良,周明.煤层厚度与振幅、频率地震属性的正演模拟.中国矿业大学学报,2004;1.1(33):29—33
11 De Vooge N,Rooijen H.Thin layer response and spectral band-width.Geophysics,1983;48(1):12—18
12 Knapp R W.Vertical resolution of thick beds,and thin-bed cy-clothems.Geophysics,1990;55(6):1184—1191
13黄真萍,王晓华,王云专.薄层地震属性参数分析和厚度预测.石油物探,1997;9.3(36):28—38
14刘建华,刘天放,李德春.薄层厚度定量解释研究.物探与化探,1997;1(27):23—27
15彭苏萍,高云峰,彭晓波,等.淮南煤田含煤地层岩石物性参数研究.煤炭学报,2004;2(29):177—181
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