断层面地震波反射的理论解
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摘要
根据断裂条件和充填质条件,基于理性力学观点,本文研究断层面对地震子波的反射和透射问题。所用地震子波为平面波时域主频近似形式。经分析认为,断层面反射依赖于充填介质的力学属性。在流体充填时,断层面对透过波表现为带通滤波特性。透射系数含有该滤波器的信息,通过透过波主频下降比率的测定可以对断层破碎带内流体波阻抗进行估计,因而透过波主频与入射波主频的比值可作为研究断层含油气指示性参数,可用于断层封堵性检测。
According to fractural condition and infilling material condition and based on theoretical mechanics,the paper studied the reflection and transmission of wavelet from fault plane.The used wavelet is approximation of dominant wavelet frequency in time domain.It is considered by analysis that the fault plane reflection relies on the mechanical attributes of infilling materials and is characteristics of band pass filter when infilling materials are fluids.The transmitted coefficient contains the information of the filter and evaluation of wave impedance of fluids in broken zone of fault can be measured by decreasing ratio of dominant frequency of transmitted wave,thus the ratio between dominant frequencies of transmitted wave and incident wave can act as studying hydrocarbon bearing indicative parameter of fault and further be used for detection of fault screen.
According to fractural condition and infilling material condition and based on theoretical mechanics,the paper studied the reflection and transmission of wavelet from fault plane.The used wavelet is approximation of dominant wavelet frequency in time domain.It is considered by analysis that the fault plane reflection relies on the mechanical attributes of infilling materials and is characteristics of band pass filter when infilling materials are fluids.The transmitted coefficient contains the information of the filter and evaluation of wave impedance of fluids in broken zone of fault can be measured by decreasing ratio of dominant frequency of transmitted wave,thus the ratio between dominant frequencies of transmitted wave and incident wave can act as studying hydrocarbon bearing indicative parameter of fault and further be used for detection of fault screen.
引文
[1]何樵登.地震勘探原理和方法.北京:地质出版社,1986
[2]Nilolaos,Berwitas andBackusM M.断层面反射的有限差分摸拟.SEG第60届年会论文集.北京:石油工业出版社,1992,107～111
[3]MiklowitzJ.ElasticWaves andWave- guides.North-HollandPubComp,1978
[4]Patrick,Basolofosao andZinsznerB E.反射界面上的反射.SEG第59届年会论文集.北京:石油工业出版社,1991,869～873
[5]GladwellG M L,范天佑译.经典弹性理论中的接触问题.北京理工大学出版社,1991
[6]肖建华.有理力学及其在地震勘探中的应用研究(博士学位论文).中国矿业大学(北京),2000
[7]孔祥安等编.固体接触力学.北京:中国铁道出版社,1999
[8]傅衣铭等.弹塑性理论.长沙:湖南大学出版社,1996,121～175
[9]BiotA M.Mechanics ofIncrementalDeformations.NewYork:JohnWiley&SonsInc,1965
[10]郭自强.固体中的波.北京:地震出版社,1982,88～119
[11]庄礼贤等.液体力学.合肥:中国科学技术大学出版社,1997,488～495
[2]Nilolaos,Berwitas andBackusM M.断层面反射的有限差分摸拟.SEG第60届年会论文集.北京:石油工业出版社,1992,107～111
[3]MiklowitzJ.ElasticWaves andWave- guides.North-HollandPubComp,1978
[4]Patrick,Basolofosao andZinsznerB E.反射界面上的反射.SEG第59届年会论文集.北京:石油工业出版社,1991,869～873
[5]GladwellG M L,范天佑译.经典弹性理论中的接触问题.北京理工大学出版社,1991
[6]肖建华.有理力学及其在地震勘探中的应用研究(博士学位论文).中国矿业大学(北京),2000
[7]孔祥安等编.固体接触力学.北京:中国铁道出版社,1999
[8]傅衣铭等.弹塑性理论.长沙:湖南大学出版社,1996,121～175
[9]BiotA M.Mechanics ofIncrementalDeformations.NewYork:JohnWiley&SonsInc,1965
[10]郭自强.固体中的波.北京:地震出版社,1982,88～119
[11]庄礼贤等.液体力学.合肥:中国科学技术大学出版社,1997,488～495
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