利用地层空间的相对稳定性、井资料、地震资料模拟高分辨率波阻抗资料
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摘要
由于地震资料是带限的,而井资料约束反演过程中的地震反演频带的展宽也是有一定限度的,使得反演地震波阻抗也是带限的。如何进一步拓宽反演地震波阻抗的频带宽度,提高地震资料的分辨率是文中研究的内容。利用井约束下的地震反演波阻抗资料、地震资料及井资料,借鉴地质模拟技术,研究如何利用地层的空间相对稳定性特征,通过相关函数的分析,估计反演更高分辨率的地震波阻抗资料。考虑到地质体空间的相关性及分辨率,相关半径取相关函数从最大点到第1个极值点的范围。在目标函数的计算过程中,既考虑当前计算点的权系数信息,又考虑井外推时的权系数信息,这样使计算结果更加稳定可靠。通过综合模拟计算,能够识别较小砂体。
The seismic impedance inversion is bandlimited. Because the breadth of frequency band of the seismic inversion constrained by well log is limited. The research in this paper is focused on how to expand the breadth of frequency band in seismic impedance inversion and to improve the resolution of seismic data. By using the logging constrained seismic impedance inversion data, the seismic data and the log data, we studied the relative stability of reservoir space and estimated and inversed the seismic impedance data with higher resolutions based on correlation function analysis and geological modeling technique used for reference. Considering the spatial correlation and distinguishability of the geologic body, we select the correlation radius in the range from the maximum point of fitted correlation function to the end of smoother section behind the point of inflexion. When calculating the objective function, we consider both the current weight coefficient and the one of extrapolating point to obtain more stable and reliable results. By synthesis simulation, we can distinguish the smaller sand body.
The seismic impedance inversion is bandlimited. Because the breadth of frequency band of the seismic inversion constrained by well log is limited. The research in this paper is focused on how to expand the breadth of frequency band in seismic impedance inversion and to improve the resolution of seismic data. By using the logging constrained seismic impedance inversion data, the seismic data and the log data, we studied the relative stability of reservoir space and estimated and inversed the seismic impedance data with higher resolutions based on correlation function analysis and geological modeling technique used for reference. Considering the spatial correlation and distinguishability of the geologic body, we select the correlation radius in the range from the maximum point of fitted correlation function to the end of smoother section behind the point of inflexion. When calculating the objective function, we consider both the current weight coefficient and the one of extrapolating point to obtain more stable and reliable results. By synthesis simulation, we can distinguish the smaller sand body.
引文
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付国强,张国栋,吴仪杰,等.2000.河流相砂岩油藏综合地质评价建模[J].石油学报,21(5):35—39.FUGuo qiang,ZHANGGuo dong,WUYi jie,etal.2000.Syntheticgeologicalevaluationandmodelingoffluvialfa ciessandstonereservoir[J].ActaPetroleiSinica,21(5):35—39(inChinese).
理查德A,沙茨英格J,F乔丹主编.2002.储层表征新进展[M].宋新民,罗凯等译.北京:石油工业出版社.78—145.RichardA,SchatzingerJ,JordanF(eds).2002.ReservoirCharacterization:RecentAdvances[M].Translatedinto ChinesebySONGXin min,LUOKai,etal.PetroleumIndustryPress,Beijing.78—145(inChinese).
李建齐,何又雄.1994.多元统计法地震岩性模拟的实现及解释[J].石油地球物理勘探,29(增刊2):82—92.LIJian qi,HEYou xiong.1994.Seismiclithologysimulatingandinterpretingwithmulti statistics[J].Petroleum GeophysicsExploration,29(Suppl2):82—92(inChinese).
孙洪泉.1990.地质统计学及其应用[M].北京:中国矿业大学出版社.34—67.SUNHong quan.1990.StatisticalGeologyandItsApplication[M].PublishingHouseofMiningUniversity,Beijing,China.34—67(inChinese).
王秉海,钱凯.1999.胜利油区地质研究与勘探实践[M].东营:石油大学出版社.234—280.WANGBing hai,QIANKai.1999.GeologicalStudyandExploringPracticeinShengliOilRegion[M].Publishing HouseofPetroleumUniversity,Dongying.234—280(inChinese).
熊琦华,陈亮,聂昌谋.1997.地质统计学在储层表征中的应用[J].断块油气田,(1):21—28.XIONGQi hua,CHENLiang,NIEChang mou.1997.Theapplicationofstatisticalgeologyinreservoirdescription[J].Fault BlockOil&GasField,(1):21—28(inChinese).
张永贵,李允,陈明强.1998.储层地质统计随机模拟[J].石油大学学报,(3):113—119.ZHANGYong gui,LIYun,CHENMing qiang.1998.Geologicalstatisticalsimulationofreservoir[J].JournalofPe troleumofUniversity,(3):113—119(inChinese).
曾锐,刘洪,陈世军,等.2004.盲反褶积技术在井间地震中的应用[J].地球物理学进展,19(2):166—171.ZENGRui,LIUHong,CHENShi jun,etal.2004.Applicationofblinddeconvolutionincross holeseismicdatapro cessing[J].ProgressinGeophysics,19(2):166—171(inChinese).
ChopraS,AlexevVandSudhakarV.2003.High frequencyrestorationofsurfaceseismicdata[J].TheLeading Edge.730—738.
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