弹性波勘探地震学研究项目组(The Consortium for Research in Elastic Wave Exploration Seismology,CREWES)是一个致力于多分量地震数据采集、分析与解释的应用地球物理研究组织,1989年成立于卡尔加里大学地质与地球物理系.CREWES的...弹性波勘探地震学研究项目组(The Consortium for Research in Elastic Wave Exploration Seismology,CREWES)是一个致力于多分量地震数据采集、分析与解释的应用地球物理研究组织,1989年成立于卡尔加里大学地质与地球物理系.CREWES的研究受到20多家世界各地的业内公司的资助,从1994年起,CREWES项目组也从加拿大自然科学与工程科研委员会获得资助.目前从加拿大自然科学与工程科研委员会获得的资助约占总资助经费的30%,这部分资金用于应用地球物理研究,也用于支持CREWES的日常支出.展开更多
Based on a detailed analysis of differences between seismic data and well logs, we discuss the problem of matching seismic traces and well logs and present a new matching method based on event search in instantaneous ...Based on a detailed analysis of differences between seismic data and well logs, we discuss the problem of matching seismic traces and well logs and present a new matching method based on event search in instantaneous phase which greatly improves seismic resolution. The method is based on flattening events in instantaneous phase to compare the seismic traces to the well log traces with the same phase. We calculate the coefficients using the singular value decomposition method to extrapolate the well logs. As a result, the events in the seismic profile are continuous and match well with well logs. We apply this method to the Mao-2 well in Daqing Oilfield with good results.展开更多
Marine active fault exploration and paleoearthquake research are still a gap in China. The paper gives a review on major research methods and new progress made abroad, including submarine survey boat, seismic reflecti...Marine active fault exploration and paleoearthquake research are still a gap in China. The paper gives a review on major research methods and new progress made abroad, including submarine survey boat, seismic reflection and acoustic reflection. Through detailed studies of offset history of 10 ka to 30 ka, it is possible to determine paleoearthquake recurrent intervals and elapsed time since last major earthquake. It is suggested that active fault exploration can be carried out by acoustic exploring method in large earthquake region of Bohai Sea. Paleoearthquake activity history can be revealed and earthquake risk in the future can be predicted.展开更多
An analysis of a passive seismic method for subsurface imaging is presented in which ambient seismic noise is employed as the source of illumination of subsurface scatterers. The imaging algorithm can incorporate new ...An analysis of a passive seismic method for subsurface imaging is presented in which ambient seismic noise is employed as the source of illumination of subsurface scatterers. The imaging algorithm can incorporate new data into the image in a recursive fashion which causes image background noise to diminish over time. Under the assumption of spatially-incoherent ambient noise, an analytical expression for the point-spread function of the imaging algorithm is derived. The point-spread function （PSF） characterizes the resolution of the image, which is a function of the receiving array length and the ambient bandwidth.展开更多
The status of deep geophysical exploration and research in China is summarized in this paper. New achievements in the study of the velocity structure, seismotectonics and geodynamics of the crust and upper mantle are ...The status of deep geophysical exploration and research in China is summarized in this paper. New achievements in the study of the velocity structure, seismotectonics and geodynamics of the crust and upper mantle are also briefly described.展开更多
文摘弹性波勘探地震学研究项目组(The Consortium for Research in Elastic Wave Exploration Seismology,CREWES)是一个致力于多分量地震数据采集、分析与解释的应用地球物理研究组织,1989年成立于卡尔加里大学地质与地球物理系.CREWES的研究受到20多家世界各地的业内公司的资助,从1994年起,CREWES项目组也从加拿大自然科学与工程科研委员会获得资助.目前从加拿大自然科学与工程科研委员会获得的资助约占总资助经费的30%,这部分资金用于应用地球物理研究,也用于支持CREWES的日常支出.
基金supported by National Natural Science Foundation of China (Grant No. 40674072)National Hi-techResearch and Development Program of China (863 Program) (Grant No. 2006AA09A102-08)+1 种基金National Basic ResearchProgram of China (the 973 Program. Grant No. 007CB209603) the Opening fund of State Key Laboratory of Geological Processes and Mineral Resources, China University of Geosciences (GPMR200633)
文摘Based on a detailed analysis of differences between seismic data and well logs, we discuss the problem of matching seismic traces and well logs and present a new matching method based on event search in instantaneous phase which greatly improves seismic resolution. The method is based on flattening events in instantaneous phase to compare the seismic traces to the well log traces with the same phase. We calculate the coefficients using the singular value decomposition method to extrapolate the well logs. As a result, the events in the seismic profile are continuous and match well with well logs. We apply this method to the Mao-2 well in Daqing Oilfield with good results.
文摘Marine active fault exploration and paleoearthquake research are still a gap in China. The paper gives a review on major research methods and new progress made abroad, including submarine survey boat, seismic reflection and acoustic reflection. Through detailed studies of offset history of 10 ka to 30 ka, it is possible to determine paleoearthquake recurrent intervals and elapsed time since last major earthquake. It is suggested that active fault exploration can be carried out by acoustic exploring method in large earthquake region of Bohai Sea. Paleoearthquake activity history can be revealed and earthquake risk in the future can be predicted.
文摘An analysis of a passive seismic method for subsurface imaging is presented in which ambient seismic noise is employed as the source of illumination of subsurface scatterers. The imaging algorithm can incorporate new data into the image in a recursive fashion which causes image background noise to diminish over time. Under the assumption of spatially-incoherent ambient noise, an analytical expression for the point-spread function of the imaging algorithm is derived. The point-spread function （PSF） characterizes the resolution of the image, which is a function of the receiving array length and the ambient bandwidth.
文摘The status of deep geophysical exploration and research in China is summarized in this paper. New achievements in the study of the velocity structure, seismotectonics and geodynamics of the crust and upper mantle are also briefly described.
