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1、全幼黎Stanford UniversityOctober,2007,科研活动的简要回顾,内容提要,地震波衰减的层析成像(Stanford)声波测井的数值模拟(Stanford)油田残余油强化开采的地震监测(Texaco)油层的地质统计描述(Texaco)地质统计软件(SMT)断层的自动识别(SMT)用生物芯片发现蛋白质生物标志物(LumiCyte)差式共振声谱仪(Stanford)地震监测地下存储的CO2(Stanford)环形换能器超声成像(Stanford/LANL)油田油储的综合监测(Stanford),1.地震波衰减的层析成像,Stanford University,1991-199
2、6频移法是我们提出和发展的一种简单实用的技术。这一方法自1997发表后得到了广泛的应用。比如说，最近一年的 Geophysics 杂志有6篇文章引用该论文。今年的SEG Expended Abstracts有7篇文章引用了这篇论文。,Acoustic Sources,Acoustic Receivers,Lower Absorption,Higher Absorption,Higher frequencyWaveform,Lower frequencyWaveform,波形和衰减,用中心频率移动法估计衰减,Medium ResponseH(f),Incident WaveS(f),Transm
3、itted WaveR(f)=S(f)H(f),H,(,f,),=,exp,-,f,a,o,dl,xxxxxxxxxxxx,oooooooooooooo,Sources,Receivers,Vf=5 kft/sQf=20,70 ft,100 ft,Vp=11.8 kft/sVs=6.9 kft/sQp=30,Vp=12 kft/sVs=7 kft/sQp=60,25,65,(a)Original model,(b)Reconstruction,Crosswell geometry,RT method for modeling,理论数据的例子,野外数据实例,The attenuation and
4、 velocity tomography for a west Texas seismic survey.The geological structure in this area is complex.The main features are two low-velocity/low-Q zones indicated by A and B,respectively.Area B is interpreted as a carbonate mound or reef.,2.声波测井的数值模拟,Stanford University,1991-1996我们提出的一种很有效的计算油井中波场的方
5、法。这一方法发表后许多人来电子邮件索取程序。有几个大石油公司在使用我们的程序。去年我把这一方法应用到一种新测井数据的解释，并申请到一项美国专利。,与井有关的地震观测手段,o,o,Vertical seismic profiling,o,Cross-boreholeprofiling,Singleboreholeprofiling,o,Soniclogging,Fluid-filledborehole,x,Source,Fluid-filledborehole,Modeling of Waves in a Borehole,Modeling of Waves in a Borehole,测井模型
6、(纵切面),Radially layered model,z,r,z,r,Complex radially symmetric model,Modeling of Waves in a Borehole,测井模型(横切面),使用的方法,Modeling of Waves in a Borehole,l,广义反射透射系数法(稳定,速度快),l,归一化的数学处理(可以模拟高频和厚层的问题),layers,Modeling of Waves in a Borehole,计算实例,简单充水裸井,有损伤的裸井,o,Source,Receivers,100 m,150 m,10 m,Formation I
7、,Formation II,Borehole,xxxxxxxxxx,从远方柱面上的反射(模型),Model,Vp=3 km/sVs=1.8 km/s,Vp=1.9 km/sVs=1.4 km/s,Seismograms(fo=800 Hz),10,150,10,50,100,150,Time(ms),source-receiver offset(m),从远方柱面上的反射(地震波),井间地震例子,ooooooooooooooo,30 m,Receivers,Sources,Cased borehole,Vp=5 km/sVs=2.9 km/s,Vp=5.8 km/s,Vs=3.3 km/s,10
8、0 m,Formation,(a)Model.There is a fault in the formation,(b)A common receiver gather,xxxxxxxxxxxxxxx,30 m,10,20,30,40,0,Time(ms),0,S-Roffset(m),100,一种新测井数据的模拟,Layered borehole model(b)The pressure field recorded at top,middle and bottom,(a),(b),3.油田残余油强化开采的地震监测,Time-lapse CO2 Monitoring,DVp(P Wave V
9、elocity Change Vp2-Vp1)Tomogram,34003900440049005400,0,1000,500,1500,0,500,1000,1500,2000,2500,Depth(ft),North(ft),East(ft),94-Source well.106,81-Receiver wells.Well separations-106-94:1216 ft,81-94:1479 ft.71,72,82-CO2 injection wells35,90,101,78,290-Production wells.GR logs are shown at source/rec
10、eiver wells.,-DVp/Vp(%),Top of Lower San Andres,1.5,0,4.油层的地质统计描述(QHD 32-6,1997),用测井数据计算孔隙度剖面,用地震数据计算的阻抗剖面,综合地震和测井数据得到的阻抗剖面,油层的三维空隙度模型,5.地质统计软件,地质统计研究空间上起伏变化的现象.,地质统计提供一些用于建立能描述空间变化规律的工具.,地质统计,这些工具包括 histogram,covariance,variogram,kriging,等等.,6.断层的自动识别,7.用生物芯片发现蛋白质生物标志物,质谱仪,两组质谱数据以及能把它们分开的几个蛋白质,8.差式
11、共振声谱仪 Differential Resonance Acoustic Spectroscopy(DARS),圆筒共振腔,Elastic constants,Q-value and permeability may be estimated from these spectra,DARS 共振谱,9.地震监测注入地下的CO2,把二氧化碳注入地下,为什么要进行监测,探测CO2移动和泄漏的路径以保证公众的安全了解被注入的CO2时间和空间分布以便更有效地进行注入操作,10.环形换能器超声成像,环形换能器和仿真模型,仿真模型的重建,Given Model,Picked Travel Time,Re
12、constructed Velocity Model,Reconstructed Reflectivity Model,11.油田油储的综合监测,An integrated monitoring study:(a)Creation of a geology model for the reservoir(b)Flow simulation(c)Conversion from flow properties to seismic models(d)Seismic simulation for a given monitoring survey(e)Seismic imaging(Migration,Tomography)(f)Comparison with field data(g)Updating of reservoir model with inversion results,Work Flow,Jerry Harris:Borehole Waves,Attenuation Tomography,DARSXiaofei Chen and Dan Moos:Borehole WavesChuntang Xu:DARSLianjie Huang:Ultrasonic tomography,Acknowledgements,
