波阻抗反演预测煤层岩浆侵入范围
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摘要
刘桥矿区布设13个钻孔,其中11-6和3-2钻孔发现6煤层有岩浆侵入,在常规地震剖面上难以确定其侵入范围,为此采用地震井约束波阻抗反演技术,即利用钻孔测井数据高纵向分辨率的特点,对井旁地震资料进行井约束反演,在此基础上对井间地震资料进行反演,推断岩浆岩在空间上的变化情况。井下实际揭露的岩性资料表明,波阻抗反演预测的刘桥矿区II62采区岩浆岩分布范围,与实际揭露资料非常一致,其侵入范围主要集中在工作区的西南部。
There are 13 boreholes laid out in the Liuqiao mine area,in which,6 coal seams have found magmatic intrusions in Nos.11-6 and 3-2 boreholes,but it is very hard to determine intrusive extent.Thus,seismic well constrained wave impedance inversion technique is used,to use logging data high longitudinal resolution characteristics carry out well side seismic data well constrained inversion.On this basis,inversion has carried out for cross-borehole seismic data to deduce spatial variation of magmatic rocks.Lithologic information revealed from underground indicated that magmatic rock distribution extent in Liuqiao mine area predicted from wave impedance is quite coincided with practically revealed information;the intrusive extent is mainly concentrated in southwestern part of the study area.
There are 13 boreholes laid out in the Liuqiao mine area,in which,6 coal seams have found magmatic intrusions in Nos.11-6 and 3-2 boreholes,but it is very hard to determine intrusive extent.Thus,seismic well constrained wave impedance inversion technique is used,to use logging data high longitudinal resolution characteristics carry out well side seismic data well constrained inversion.On this basis,inversion has carried out for cross-borehole seismic data to deduce spatial variation of magmatic rocks.Lithologic information revealed from underground indicated that magmatic rock distribution extent in Liuqiao mine area predicted from wave impedance is quite coincided with practically revealed information;the intrusive extent is mainly concentrated in southwestern part of the study area.
引文
[1]李仁海,崔若飞,毛欣荣,等.利用岩性解释方法圈定岩浆岩侵入煤层范围[J].地球物理学进展,2008,23(1):242-248.
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[2]王立国,程远平,郭品坤,等.火成岩侵蚀区煤层瓦斯赋存规律探讨[J].能源技术与管理,2009,4:17-19.
[3]崔若飞,孙学凯,崔大尉.地震反演—煤田地震勘探的新进展[J].中国煤炭地质,2008,6:49-52.
[4]崔若飞,孙学凯,崔大尉.基于地震反演方法的奥陶系顶部含隔水层探测[J].岩土力学与工程学报,2009,2:319-323.
[5]姚振兴,张霖斌,记晨,等.叠后地震剖面的线性化波阻抗反演[J].石油地球物理勘探,1995,30(5):609-614.
[6]刘莹.利用测井约束反演技术辨别气层与煤层[J].石油物探,1999,38(4):51-56.
[7]王廷光.储层地震反演方法以及应用中的关键问题对策[J].石油物探,2002,41(3):299-303.
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