地震波场最大能量扫描法预测煤层瓦斯的应用研究
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摘要
煤储层是典型的流固耦合渗流模型的双相介质。固体颗粒与孔隙中流体之间存在相对位移,导致双相介质中地震波能量再分配发生变化。尝试研究了采用三角滤波提取特定频率的地震波属性,再以地震波场最大能量扫描法分别求取给定的低、高频范围内地震波能量的最大值以达到由地震资料直接圈定出瓦斯富集区的目的。实际资料测试结果表明,以双相介质理论为基础,能够相应提高地震资料处理与反演结果的精度与可靠性。
The coal reservoir was a kind of typical fluid-solid-coupling seepage model of double-phase medium(DPM),the relative displacement existed between the solid granules and pore fluid in DPM,and would primarily result in the change of seismic wave energy redistribution.In order to achieve the aim of directly determining gas enrichment region according to the seismic data,authors tried to extract the attributes of seismic wave with specific frequency by the triangle filter,then determine the maximum energy of seismic waves within the given high frequency and low frequency ranges by scanning the maximum energy of seismic wave field.The test of actual data indicated that the maximum energy scan algorithm can improve the precision and reliability of processing and inversion of seismic data.
The coal reservoir was a kind of typical fluid-solid-coupling seepage model of double-phase medium(DPM),the relative displacement existed between the solid granules and pore fluid in DPM,and would primarily result in the change of seismic wave energy redistribution.In order to achieve the aim of directly determining gas enrichment region according to the seismic data,authors tried to extract the attributes of seismic wave with specific frequency by the triangle filter,then determine the maximum energy of seismic waves within the given high frequency and low frequency ranges by scanning the maximum energy of seismic wave field.The test of actual data indicated that the maximum energy scan algorithm can improve the precision and reliability of processing and inversion of seismic data.
引文
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[2]Li Gang,Ning Shunian.A Method for Forecast of Coalbed Meth-ane Enrichment[C].北京:第23届国际有机岩石学年会,2006.
[3]杨双安,宁书年,张会星.基于双相介质理论的煤层甲烷预测技术[J].煤炭学报,2005,30(S):66~68.
[4]张会星,何兵寿,宁书年.双相介质中纵波方程的高阶有限差分法[J].物探与化探,2004,28(4):307~309.
[5]轩义华,何樵登,孟庆生,等.双相各向异性介质中的拟慢纵波研究[J].石油天然气学报,2006,28(4):58~60.
[6]王德利,何樵登.双相各向异性介质中孔隙度和渗透率反演[C].长春:中国地球物理学会第21届年会,2005:554~554.
[7]轩义华,何樵登,林炎,等.双相各向异性介质的波场研究[C].成都:中国地球物理学会第22届年会,2006:569~569.
[8]张会星,何兵寿,梁秀文.双相介质中地震波动方程正演模拟[C].北京:CPS/SEG2004国际地球物理会议,2004:174~176.
[9]韩华,章梓茂,魏培君.二维双相介质多参数反演的同伦法[J].岩石力学与工程学报,2004,23(18):3144~3145.
[10]田迎春.层状黏弹性双相介质的动力响应与物性参数反演研究[D].北京:北京交通大学,2007.
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