地球物理勘探中,对于弹性参数的获取途径,般有地震勘探,声波测井以及实验室测量三类手段。首先,传统的实验室速度测量是在MHz频率范围内进行的,声波测井在10 k Hz频率范围内进行的,地面地震在0~100 Hz频率范围内进行的。对于常用的弹性...地球物理勘探中,对于弹性参数的获取途径,般有地震勘探,声波测井以及实验室测量三类手段。首先,传统的实验室速度测量是在MHz频率范围内进行的,声波测井在10 k Hz频率范围内进行的,地面地震在0~100 Hz频率范围内进行的。对于常用的弹性参数数据,不同的获取途径之间有着测量频率的区别。当今具有挑战性的探索要求我们利用所有类型的数据进行更好的综合定量解释。展开更多
The coal bed methane content(CBMC)in the west mining area of Jincheng coalfield,southeastern Qjnshui Basin,is studied based on seismic data and well-logs together with laboratory measurements.The results show that the...The coal bed methane content(CBMC)in the west mining area of Jincheng coalfield,southeastern Qjnshui Basin,is studied based on seismic data and well-logs together with laboratory measurements.The results show that the Shuey approximation has better adaptability according to the Zoeppritz equation result;the designed fold number for an ordinary seismic data is sufficient for post-stack data but insufficient for pre-stack data regarding the signal to noise ratio(SNR).Therefore a larger grid analysis was created in order to improve the SNR.The velocity field created by logging is better than that created by stack velocity in both accuracy and effectiveness.A reasonable distribution of the amplitude versus offset(AVO)attributes can be facilitated by taking the AVO response from logging as a standard for calibrating the amplitude distribution.Some AVO attributes have a close relationship with CBMC.The worst attribute is polarization magnitude,for which the correlation coefficient is 0.308;and the best attribute is the polarization product from intercept,of which the correlation coefficient is-0.8136.CBMC predicted by AVO attributes is better overall than that predicted by direct interpolation of CBMC;the validation error of the former is 14.47%,which is lower than that of the latter 23.30%.CBMC of this area ranges from2.5 m^3/t to 22 m^3/t.Most CBMC in the syncline is over 10m^3/t,but it is below 10m^3/t in the anticline;on the whole,CBMC in the syncline is higher than that in anticline.展开更多
文摘地球物理勘探中,对于弹性参数的获取途径,般有地震勘探,声波测井以及实验室测量三类手段。首先,传统的实验室速度测量是在MHz频率范围内进行的,声波测井在10 k Hz频率范围内进行的,地面地震在0~100 Hz频率范围内进行的。对于常用的弹性参数数据,不同的获取途径之间有着测量频率的区别。当今具有挑战性的探索要求我们利用所有类型的数据进行更好的综合定量解释。
基金supported by the National Basic Research Program of China(Nos.2009CB219603,2010CB226800,2009CB724601 and 2012BAC10B03)the National Natural Science Foundation of China(Major Program)(Nos.50490271 and 40672104)+2 种基金the National Natural Science Foundation of China(General Program)(No.40874071)the National Science&Technology Pillar Program in the Eleventh Five-Year Plan Period(Nos.2012BAB13B01 and2012BAC10B03)the Key Grant Project of Chinese Ministry of Education(No.306002)
文摘The coal bed methane content(CBMC)in the west mining area of Jincheng coalfield,southeastern Qjnshui Basin,is studied based on seismic data and well-logs together with laboratory measurements.The results show that the Shuey approximation has better adaptability according to the Zoeppritz equation result;the designed fold number for an ordinary seismic data is sufficient for post-stack data but insufficient for pre-stack data regarding the signal to noise ratio(SNR).Therefore a larger grid analysis was created in order to improve the SNR.The velocity field created by logging is better than that created by stack velocity in both accuracy and effectiveness.A reasonable distribution of the amplitude versus offset(AVO)attributes can be facilitated by taking the AVO response from logging as a standard for calibrating the amplitude distribution.Some AVO attributes have a close relationship with CBMC.The worst attribute is polarization magnitude,for which the correlation coefficient is 0.308;and the best attribute is the polarization product from intercept,of which the correlation coefficient is-0.8136.CBMC predicted by AVO attributes is better overall than that predicted by direct interpolation of CBMC;the validation error of the former is 14.47%,which is lower than that of the latter 23.30%.CBMC of this area ranges from2.5 m^3/t to 22 m^3/t.Most CBMC in the syncline is over 10m^3/t,but it is below 10m^3/t in the anticline;on the whole,CBMC in the syncline is higher than that in anticline.
