基于地震波复数道分析的储层流体识别
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摘要
储层含有油气等流体区域对地震波的吸收衰减比周围干层区域严重,地震剖面解释的精确度较低。应用粘弹介质体中的声波传播方程进行含流体储层的地震信号响应的数值模拟,得到储层合成地震记录剖面,应用复数道分析技术对地震记录进行瞬时参数与主参数的提取,重点分析各种瞬时参数对流体识别的敏感性。研究结果表明:主参数对流体识别的敏感性明显优越于瞬时参数。主参数对流体识别的敏感程度依次为:主相位最敏感,主振幅次之,主频率最差。主相位和主振幅在流体识别中将起到重要作用。
The seismic waves are absorbed and decayed more seriously in the reservoirs stratum which contain the oil and gas than the surrounding dry layer or rock,and the precision of seismic profile interpretation is low.The acoustic equation in viscoelastic medium was applied to simulate the seismic records in the fluid reservoir,and the synthetic seismic recording profile was obtained.The instantaneous parameters and main parameters of seismic records were extracted using complex trace analysis,various instantaneous parameters on the sensitivity of the fluid recognition were analysed as the key.The results of the study show that the sensitive degree of main parameters are prior to instantaneous parameters.Main parameters on the sensitive degree of fluid recognition are as follows: main phase is the most sensitive,main amplitude is inferior,and main frequency is the worst.The main phase and main amplitude will play important roles on fluid identification.
The seismic waves are absorbed and decayed more seriously in the reservoirs stratum which contain the oil and gas than the surrounding dry layer or rock,and the precision of seismic profile interpretation is low.The acoustic equation in viscoelastic medium was applied to simulate the seismic records in the fluid reservoir,and the synthetic seismic recording profile was obtained.The instantaneous parameters and main parameters of seismic records were extracted using complex trace analysis,various instantaneous parameters on the sensitivity of the fluid recognition were analysed as the key.The results of the study show that the sensitive degree of main parameters are prior to instantaneous parameters.Main parameters on the sensitive degree of fluid recognition are as follows: main phase is the most sensitive,main amplitude is inferior,and main frequency is the worst.The main phase and main amplitude will play important roles on fluid identification.
引文
[1]赵军龙,李新胜,张彬.基于测井曲线小波分析与希尔伯特变换的流体识别新方法[J].石油地球物理勘探,2010,45(2):290-294.
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[6]VOIGT W.Uber die Beziehung Zw ischen Den Beiden Elastiziats-konstanten IsotroperKorper[J].Wied Ann,1889(38):573-587.
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[9]冯智慧,王世煜.高分辨率地震信号瞬时特征分析方法[J].吉林大学学报:地球科学版,2007,37(增刊):82-85.
[10]李世雄,陈东方.信号瞬时参数计算方法评价[J].信号处理,2003,19(1):59-63.
[11]黄德济,赵宪生.时频域中主参数剖面的计算及应用[J].物探与化探计算技术,1994,16(3):197-203.
[12]刘其,赵永勤,窦慧媛,等.利用地震波主参数预测岩性和油气[J].石油物探,2003,42(1):77-78.
[2]杨文博,张世鑫,宗兆云.基于叠前地震反演的储层流体识别方法[J].物探与化探计算技术,2010,32(6):601-606.
[3]贺振华,黄德济.复杂油气藏地震波场特征方法理论及应用[M].成都:四川科学技术出版社,1999.
[4]贺振华.地震波复数道分析的计算方法[J].石油物探,1980,19(4):64-80.
[5]黄德济.地震勘探资料数字处理[M].北京:地质出版社,1990.
[6]VOIGT W.Uber die Beziehung Zw ischen Den Beiden Elastiziats-konstanten IsotroperKorper[J].Wied Ann,1889(38):573-587.
[7]傅旦丹,刘洋,陈遵德,等.粘弹介质中声波的伪谱法模拟[J].江汉石油学院学报,1993,15(4):32-39.
[8]程乾生.希尔伯特变换与信号的包络、瞬时相位和瞬时频率[J].石油地球物理勘探,1979,14(3):1-14.
[9]冯智慧,王世煜.高分辨率地震信号瞬时特征分析方法[J].吉林大学学报:地球科学版,2007,37(增刊):82-85.
[10]李世雄,陈东方.信号瞬时参数计算方法评价[J].信号处理,2003,19(1):59-63.
[11]黄德济,赵宪生.时频域中主参数剖面的计算及应用[J].物探与化探计算技术,1994,16(3):197-203.
[12]刘其,赵永勤,窦慧媛,等.利用地震波主参数预测岩性和油气[J].石油物探,2003,42(1):77-78.
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