三分量数字检波器在ZY油田应用效果分析
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摘要
在水平分量的炮集记录中,数字三分量检波器直达波的椭圆率明显呈现出线性偏振的形态,并具有较高的分辨率,而模拟三分量检波器直达波的线性偏振不清晰,抗干扰能力差.在频谱分析和能量曲线分析的对比中,数字检波器的性能也高于模拟检波器.在PP波弱波阻抗界面的沙河组沙三12段,PS波表现出强反射界面,而且构造幅度比PP波剖面明显.在PS波剖面上,剖面深处两边的构造联系清晰可见,而在PP波剖面上很难解释剖面两边构造之间的关系,表明PS波资料对深层界面的成像能力有时不比PP波能力差,多分量资料在构造勘探上具有互补性.在沙四层底钻遇气层的马62井和马11井的测线CDP位置上,PP波和PS波的振幅比剖面上表现出低振幅比异常区,与钻井结果吻合.用多分量衰减系数或衰减比剖面,能够识别砂岩含气/水产生所产生的高频衰减异常.多分量地震属性及其比值剖面是储层含气异常指示的有效参数.
The ellipticity of direct arrival of the digital three component sensor on the radial axis(X) and transverse axis(Y) acts as a linearly polarized event and the resolution of its distinguishing polarization coefficient is also higher,but the linearly polarized event of traditional three component geophone is noticeably degraded.The resolution is so poor as to make the observation of first arrival difficult.The performance of the digital sensor is better than the traditional geophone during the spectrum and energy analysis of both data. The PP wave section appears weak impedance on the SHASAN segment~12 of SHAHE formation,however the PS wave section is strong impedance on it and the structure of the SHASAN segment~12 on PS wave section displays obviously comparing PP wave data.Under 2 second the structures both sides of PS wave section can be interpreted but the relationship of structures both sides of PP wave section is hardly recognized.This demonstrated that the imaging ability of PS wave for depth layers is not bad at sometimes comparing the PP wave ability.The multi component data have the co-supplement on structure prospecting. The amplitude ratio of PP/PS wave represents a lower abnormal area on the bottom of SHASI formation gas reservoir where the MA 62 well and MA 11 well were located.The section of attenuation or attenuation ratio for multi-component data can distinguish from gas/liquid.The attribution or attribution ratio of multi-component data are the effective parameters for the abnormal indictor at gas reservoir exploring.
The ellipticity of direct arrival of the digital three component sensor on the radial axis(X) and transverse axis(Y) acts as a linearly polarized event and the resolution of its distinguishing polarization coefficient is also higher,but the linearly polarized event of traditional three component geophone is noticeably degraded.The resolution is so poor as to make the observation of first arrival difficult.The performance of the digital sensor is better than the traditional geophone during the spectrum and energy analysis of both data. The PP wave section appears weak impedance on the SHASAN segment~12 of SHAHE formation,however the PS wave section is strong impedance on it and the structure of the SHASAN segment~12 on PS wave section displays obviously comparing PP wave data.Under 2 second the structures both sides of PS wave section can be interpreted but the relationship of structures both sides of PP wave section is hardly recognized.This demonstrated that the imaging ability of PS wave for depth layers is not bad at sometimes comparing the PP wave ability.The multi component data have the co-supplement on structure prospecting. The amplitude ratio of PP/PS wave represents a lower abnormal area on the bottom of SHASI formation gas reservoir where the MA 62 well and MA 11 well were located.The section of attenuation or attenuation ratio for multi-component data can distinguish from gas/liquid.The attribution or attribution ratio of multi-component data are the effective parameters for the abnormal indictor at gas reservoir exploring.
引文
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[2]Byerley G,Clausen C,Tessman J.Ekofisk VectorSeis test:Improvements in vector fidelity of 4C seismic data[J].73thAnn Internat MtgSEG,Expanded Abstracts,2003,813~816.
[3]Mitchell J T,Derzhi N,Lichma E.Energy absorption analy-sis:A case study[J].66th Ann Internat Mtg SEG,ExpandedAbstracts,1996,1785~1788.
[4]黄中玉,王于静,苏永昌.一种新的地震波衰减分析方法[j].石油地球物理勘探,2000,35(6):768~773.
[5]石玉梅,姚逢昌,曹宏.多波多分量天然气勘探技术的进展[J].勘探地球物理进展,2003,26(3):172~177.
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