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OALib Journal期刊
ISSN: 2333-9721
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基于遗传算法的天然气水合物似海底反射层速度结构全波形反演
Keywords: 全波形反演,天然气水合物,似海底反射层,遗传算法,速度结构
Abstract:
？似海底反射层的速度异常是识别天然气水合物的重要标志。本文基于遗传算法提出了一种针对天然气水合物似海底反射层的全波形反演方法。这种方法分为全局搜索与局部搜索两部分,即首先使用遗传算法进行旅行时反演得到背景速度模型,然后以其作为初始模型,使用共轭梯度算法进行全波形反演。对含噪数据的数值试验表明,该算法具有较高的稳定性,并确定了进行天然气水合物似海底反射层全波形反演的遗传算子。将这种波形反演方法应用于我国南海北部海域的天然气水合物研究,得到了分辨率高于常规速度分析的似海底反射层速度结构,并识别出似海底反射层的速度异常,为准确识别天然气水合物层和游离气层及研究其分布特征和形成机制提供了基础;反演结果也同时证明了本文方法的高稳定性以及对天然气水合物似海底反射层速度结构研究的适用性。
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|
| [3] | holbrookws,hoskinsh，woodwtetal.mcth-anchydrateandfreegasontheblakeridgefromver-dealseismicprofiling[j].science.1996,273:1840-1843
|
| [4] | rcmpclaw,buffcttba.formationandaccumula-tionofgashydrateinporousmedia[j].jgeophysres.1997,102(b5):10151-10164
|
| [5] | sambridgem,drijkoningeng.geneticalgorithmsinseismicwaveforminversion[j].geophysjint.1992,109:323-342
|
| [6] | michalewiczz.geneticalgorithm+datastructure=evolutionprograms.ncwyork;springcr_vcrlagberlinhcidclberg,1996
|
| [7] | 石琳坷，孙铭心，王广国等.地球物理遗传反演方法.北京:地震出版社,2000
|
| [8] | kormendif,dictrichm.non-linearwaveforminver-lionofplanewaveseismogramsinstratifiedelasticmedia[j].geophysics.1991,56(5):664-674
|
| [9] | kcnncttbi.n，kerrynj.seismicwavesinastrati-tiedhalf-space.geophysjrastronsoc，1979，57:557-583
|
| [10] | 张繁昌，印兴耀，赵剑.慢度法全波场模拟及其水平慢度积分的实现[j].石油地球物理勘探.2003,38(6):597-602？？浏览
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| [11] | hamiltonel.vp/vsandpoissorisratiosinmarinesedimentsandrocks[j].jacoustsocam.1979,66(4):1093-1101
|
| [12] | lccjh，backys,ryubjetal.aseismicsurveytodetectnaturalgashydrateintheeastscaofkorca.margeophysres,2005，3,26(1):51-59
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| [13] | tatsuosacki，mascohayashi，takaolnamorictal.velocitystructureofthekumanobasininthenankaitrough.proceedingsofthe5thinternationalcon-feremeongashydrates,2005，tune,13-16
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| [14] | shipleyth，houstonmh，bullerrtetal.seismicevidenceforwide-spreadpossiblegashydratehori-ionsoncontinentalslopesandmargins.amassocpetgeolbull，1979，63:2201-2213
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| [15] | mackayme,jarrardrd,wcstbrookgkctal.ori-ginofbottom-simulatingreflectors;geophysicalevi-deucefromthecascadianaccretinaryprism[j].geolo-ky.1994,22(5):459-462
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| [16] | hyndmanr，spencega.seismicstudyofmethanehydratesmarinebottomsimulatingreflectors.jgeo-physres，1992，97:6638-6698
|
| [17] | chengwb,leccs,liucs.velocitystructureinmarinesedimentswithgashydratereflectorsinoff-shoreswtaiwan,fromobsdatatomography.teratinoce，2006，17(4):739-756
|
| [18] | zillmcrm,flucher，petersonj.seismicinvestiga-tionofabottomsimulatingreflectorandquantifica-tionofgashydrateintheblacksca[j].geophysjint.2005,161(3):662-678
|
| [19] | jaiswalp，zcltca,pecher7a.seismiccharacteriza-tionofagashydratesysteminthegulfofmexicou-singwide-aperturedata.geophyjint,2006，165(1):
|
| [20] | nctzcbandgi.,hubschcrcp，gajcwskidjetal.seismicvelocitiesfromtheyaquinaforcarcbasinoffperu:evidenceforfreegaswithinthegashydratestabilityzone.intjearthsci，2005，94(3):420-432
|
| [21] | eckcrc,dvorkinj，nuram.estimatingtheamountofhydrateandfreegasfrommarineseismicdata.ge-ophysics，2000，65(2):565-573
|
| [22] | 陈建文，吴志强，龚建明.天然气水合物的地球物理识别技术.海洋地质动态，200,20(6):1-5
|
| [23] | singhsc，minshullta,spenceud.velocitystruc-tureofgashydratereflector[j].science.1993,260:204-207
|
| [24] | minshullta，singhsc，westbrookgk.seismicvelocitystructureatagashydratereflector,offshorcwesterncolumbia,fromfullwaveforminversion[j].jgeophysres.1994,99:4715-4734
|
| [25] | pecher7a，minshullta，singhscetal.velocitystructureofabottomsimulatingreflectoroffshoreperu:resultsfromfullwaveformandtraveltimein-versionofwide-angleseismicdata.jgeophys，1997，
|
| [26] | pcchcr7a，rancrocr，hucneretal.thenatureanddistributionofbottomsimulatingreflectorsatthecostaricanconvergentmargin[j].geophysjint.1998,133:219-229
|
| [27] | yuant,spencegd,hyndmanrdetal.seismicve-locitystudiesofagashydratesimulatingreflectoronthenortherncascadiacontinentmargin;amplitudemodelingandfullwaveforminversion[j].jgeophysres.1999,104:1179-1191
|
| [28] | 宋海斌，osamum,kuramotos.天然气水合物似海底反射层的全波形反演.地球物理学报，2003,46(1):42-46
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