基于衰減補(bǔ)償?shù)母咚故品椒ㄑ芯?/H1>
發(fā)布時間：2018-09-08 13:11
【摘要】：高斯束偏移是近年來發(fā)展的一種較好的偏移算法,它不僅具有接近于波動方程偏移的成像精度,而且保留了Kirchhoff積分方法高效靈活的優(yōu)點(diǎn),能夠有效解決多值走時問題。由于實際地下介質(zhì)的黏滯性引起地震波傳播過程中的振幅衰減和相位畸變,降低了地震勘探的分辨率,影響了偏移成像的質(zhì)量。本文以補(bǔ)償?shù)卣鸩ㄔ陴椥越橘|(zhì)中的衰減,增強(qiáng)深層反射能量,提高偏移成像質(zhì)量為目標(biāo),以高斯束偏移理論為基礎(chǔ),研究基于衰減補(bǔ)償?shù)母咚故品椒�。為了用高斯束法模擬黏彈性介質(zhì)中波的傳播,本文基于已有的彈性高斯束理論,引入與品質(zhì)因子Q有關(guān)的復(fù)速度和精確的黏彈性Zoeppritz方程,合成黏彈性地震記錄。為了對衰減的地震記錄進(jìn)行補(bǔ)償,本文首先基于共炮域高斯束偏移原理,推導(dǎo)補(bǔ)償吸收衰減的表達(dá)式,校正品質(zhì)因子Q引起的振幅衰減和相位畸變,實現(xiàn)基于吸收衰減補(bǔ)償?shù)母咚故�。�?shù)值試驗和實際資料表明,該方法有效補(bǔ)償了深層反射能量,提高了偏移成像質(zhì)量。然后,本文利用格林函數(shù)合成正傳和反傳波場,基于互相關(guān)成像條件實現(xiàn)共炮域高斯束逆時偏移,并在此基礎(chǔ)上引入與Q有關(guān)的吸收(補(bǔ)償)算子,對比高斯束波場格林函數(shù)與頻率域波動方程正演格林函數(shù)的精度,給出補(bǔ)償原理和流程,實現(xiàn)基于吸收衰減補(bǔ)償?shù)母咚故鏁r偏移。基于衰減補(bǔ)償?shù)母咚故鏁r偏移同時補(bǔ)償正傳和反傳波場,校正波傳播中的旅行時,可以得到與波動方程逆時偏移補(bǔ)償相當(dāng)?shù)男Ч�。多分量地震勘探能得到PP波和PS波數(shù)據(jù),與僅有P波相比,這些波攜帶了目標(biāo)區(qū)不同的信息,他們能夠提供更多的地球物理參數(shù),有效地提高了地震勘探的精度。因此,為了充分利用多分量信息,本文在黏聲波高斯束偏移和黏聲波高斯束逆時偏移方法的基礎(chǔ)上提出了基于吸收衰減補(bǔ)償?shù)亩喾至扛咚故坪突谖账p補(bǔ)償?shù)亩喾至扛咚故鏁r偏移。首先把波場分解為PP波和PS波,然后分別基于聲波方程的標(biāo)量方法做偏移,目的是提供一個新的有效的多分量數(shù)據(jù)成像技術(shù),同時補(bǔ)償多分量地震記錄的衰減效應(yīng)。數(shù)值試驗結(jié)果表明,以上兩種基于衰減補(bǔ)償?shù)亩喾至扛咚故品椒ň行У馗倪M(jìn)了多分量地震記錄的成像精度,提高了偏移成像分辨率,尤其是在強(qiáng)吸收區(qū)域。
[Abstract]:Gao Si beam migration is a better migration algorithm developed in recent years. It not only has the imaging accuracy close to wave equation migration, but also retains the advantages of Kirchhoff integration method, which can effectively solve the multi-value travel time problem. The amplitude attenuation and phase distortion in the process of seismic wave propagation are caused by the viscous property of the actual underground medium, which reduces the resolution of seismic exploration and affects the quality of migration imaging. In order to compensate the attenuation of seismic waves in viscoelastic media, enhance the deep reflection energy and improve the imaging quality of migration, based on Gao Si's beam migration theory, this paper studies a new method of Gao Si beam migration based on attenuation compensation. In order to simulate the propagation of waves in viscoelastic media by using Gao Si beam method, the viscoelastic seismic records are synthesized by introducing complex velocities and accurate viscoelastic Zoeppritz equations related to the quality factor Q based on the existing theory of elastic Gao Si beams. In order to compensate for the attenuation of seismic records, based on the principle of Gao Si beam migration in common gun domain, the expression of compensation for absorption attenuation is derived, and the amplitude attenuation and phase distortion caused by quality factor Q are corrected. Gao Si beam offset based on absorption attenuation compensation is realized. Numerical experiments and practical data show that the method can effectively compensate the deep reflection energy and improve the migration imaging quality. Then, the forward and backward wave fields are synthesized by Green's function, and the inverse time migration of Gao Si beam in common gun domain is realized on the basis of cross-correlation imaging condition. On this basis, the absorption (compensation) operator related to Q is introduced. Comparing the accuracy of Green's function of Gao Si beam wave field with that of forward Green's function of wave equation in frequency domain, the principle and flow of compensation are given, and then the inverse time migration of Gao Si beam based on absorption attenuation compensation is realized. Based on attenuation compensation, Gao Si beam inverse time migration compensates both forward and back wave fields, and the travel time in wave propagation can be corrected, which is equivalent to the compensation of wave equation inverse time migration. PP wave and PS wave data can be obtained by multi-component seismic exploration. Compared with only P wave, these waves carry different information of target area, they can provide more geophysical parameters and effectively improve the accuracy of seismic exploration. Therefore, in order to make full use of multi-component information, In this paper, based on the methods of Gao Si beam migration of viscoacoustic wave and the inverse time migration method of Gao Si beam, we propose a new method, which is based on absorption attenuation compensation, and a new method based on absorption attenuation compensation, which is based on the inverse time migration of Gao Si beam, which is based on absorption attenuation compensation. First, the wave field is decomposed into PP wave and PS wave, and then the scalar method based on acoustic wave equation is used to offset the wave field. The aim is to provide a new and effective multi-component data imaging technique and compensate for the attenuation effect of multi-component seismic records. The numerical results show that the above two methods based on attenuation compensation can effectively improve the imaging accuracy of multi-component seismic records and improve the resolution of migration imaging, especially in the strong absorption region.
【學(xué)位授予單位】：中國石油大學(xué)(北京)
【學(xué)位級別】：博士
【學(xué)位授予年份】：2016
【分類號】：P631.4
【參考文獻(xiàn)】
相關(guān)期刊論文 前10條
1 黃建平;袁茂林;段新意;李振春;劉斌;岳玉波;;一種解耦的起伏地表彈性波高斯束偏移方法[J];石油地球物理勘探;2015年03期
2 韓建光;王峗;張曉波;刑占濤;;VTI介質(zhì)高斯束疊前深度偏移[J];石油地球物理勘探;2015年02期
3 黃建平;袁茂林;李振春;方伍寶;岳玉波;;雙復(fù)雜條件下彈性波非傾斜疊加精確束偏移方法研究[J];石油物探;2015年01期
4 黃建平;袁茂林;李振春;岳玉波;;雙復(fù)雜條件下非傾斜疊加精確束偏移方法及應(yīng)用Ⅰ——聲波方程[J];地球物理學(xué)報;2015年01期
5 趙巖;劉洋;任志明;;基于優(yōu)化時空域高階有限差分方法的粘滯聲波疊前逆時偏移(英文)[J];Applied Geophysics;2014年01期
6 段鵬飛;程玖兵;陳愛萍;何光明;;TI介質(zhì)局部角度域高斯束疊前深度偏移成像[J];地球物理學(xué)報;2013年12期
7 劉鵬;楊長春;王彥飛;;三維TTI介質(zhì)格林函數(shù)的高斯束計算方法[J];地球物理學(xué)進(jìn)展;2013年05期
8 李志遠(yuǎn);梁光河;谷丙洛;;基于散度和旋度縱橫波分離方法的改進(jìn)[J];地球物理學(xué)報;2013年06期
9 謝飛;李佩;黃中玉;魏修成;朱成宏;;高斯射線束疊前深度偏移成像研究[J];石油物探;2013年01期
10 岳玉波;李振春;錢忠平;張建磊;孫鵬遠(yuǎn);馬光凱;;復(fù)雜地表條件下保幅高斯束偏移[J];地球物理學(xué)報;2012年04期
相關(guān)會議論文 前1條
1 袁茂林;步長城;李振春;黃建平;;起伏地表彈性波高斯束偏移方法研究[A];中國地球物理2013——第二十二專題論文集[C];2013年
相關(guān)博士學(xué)位論文 前1條
1 岳玉波;復(fù)雜介質(zhì)高斯束偏移成像方法研究[D];中國石油大學(xué);2011年
相關(guān)碩士學(xué)位論文 前1條
1 栗學(xué)磊;基于高斯束的彈性波場計算方法研究[D];吉林大學(xué);2013年
，
本文編號：2230617
本文鏈接：http://www.sikaile.net/kejilunwen/diqiudizhi/2230617.html
[Abstract]:Gao Si beam migration is a better migration algorithm developed in recent years. It not only has the imaging accuracy close to wave equation migration, but also retains the advantages of Kirchhoff integration method, which can effectively solve the multi-value travel time problem. The amplitude attenuation and phase distortion in the process of seismic wave propagation are caused by the viscous property of the actual underground medium, which reduces the resolution of seismic exploration and affects the quality of migration imaging. In order to compensate the attenuation of seismic waves in viscoelastic media, enhance the deep reflection energy and improve the imaging quality of migration, based on Gao Si's beam migration theory, this paper studies a new method of Gao Si beam migration based on attenuation compensation. In order to simulate the propagation of waves in viscoelastic media by using Gao Si beam method, the viscoelastic seismic records are synthesized by introducing complex velocities and accurate viscoelastic Zoeppritz equations related to the quality factor Q based on the existing theory of elastic Gao Si beams. In order to compensate for the attenuation of seismic records, based on the principle of Gao Si beam migration in common gun domain, the expression of compensation for absorption attenuation is derived, and the amplitude attenuation and phase distortion caused by quality factor Q are corrected. Gao Si beam offset based on absorption attenuation compensation is realized. Numerical experiments and practical data show that the method can effectively compensate the deep reflection energy and improve the migration imaging quality. Then, the forward and backward wave fields are synthesized by Green's function, and the inverse time migration of Gao Si beam in common gun domain is realized on the basis of cross-correlation imaging condition. On this basis, the absorption (compensation) operator related to Q is introduced. Comparing the accuracy of Green's function of Gao Si beam wave field with that of forward Green's function of wave equation in frequency domain, the principle and flow of compensation are given, and then the inverse time migration of Gao Si beam based on absorption attenuation compensation is realized. Based on attenuation compensation, Gao Si beam inverse time migration compensates both forward and back wave fields, and the travel time in wave propagation can be corrected, which is equivalent to the compensation of wave equation inverse time migration. PP wave and PS wave data can be obtained by multi-component seismic exploration. Compared with only P wave, these waves carry different information of target area, they can provide more geophysical parameters and effectively improve the accuracy of seismic exploration. Therefore, in order to make full use of multi-component information, In this paper, based on the methods of Gao Si beam migration of viscoacoustic wave and the inverse time migration method of Gao Si beam, we propose a new method, which is based on absorption attenuation compensation, and a new method based on absorption attenuation compensation, which is based on the inverse time migration of Gao Si beam, which is based on absorption attenuation compensation. First, the wave field is decomposed into PP wave and PS wave, and then the scalar method based on acoustic wave equation is used to offset the wave field. The aim is to provide a new and effective multi-component data imaging technique and compensate for the attenuation effect of multi-component seismic records. The numerical results show that the above two methods based on attenuation compensation can effectively improve the imaging accuracy of multi-component seismic records and improve the resolution of migration imaging, especially in the strong absorption region.
【學(xué)位授予單位】：中國石油大學(xué)(北京)
【學(xué)位級別】：博士
【學(xué)位授予年份】：2016
【分類號】：P631.4
【參考文獻(xiàn)】
相關(guān)期刊論文 前10條
1 黃建平;袁茂林;段新意;李振春;劉斌;岳玉波;;一種解耦的起伏地表彈性波高斯束偏移方法[J];石油地球物理勘探;2015年03期
2 韓建光;王峗;張曉波;刑占濤;;VTI介質(zhì)高斯束疊前深度偏移[J];石油地球物理勘探;2015年02期
3 黃建平;袁茂林;李振春;方伍寶;岳玉波;;雙復(fù)雜條件下彈性波非傾斜疊加精確束偏移方法研究[J];石油物探;2015年01期
4 黃建平;袁茂林;李振春;岳玉波;;雙復(fù)雜條件下非傾斜疊加精確束偏移方法及應(yīng)用Ⅰ——聲波方程[J];地球物理學(xué)報;2015年01期
5 趙巖;劉洋;任志明;;基于優(yōu)化時空域高階有限差分方法的粘滯聲波疊前逆時偏移(英文)[J];Applied Geophysics;2014年01期
6 段鵬飛;程玖兵;陳愛萍;何光明;;TI介質(zhì)局部角度域高斯束疊前深度偏移成像[J];地球物理學(xué)報;2013年12期
7 劉鵬;楊長春;王彥飛;;三維TTI介質(zhì)格林函數(shù)的高斯束計算方法[J];地球物理學(xué)進(jìn)展;2013年05期
8 李志遠(yuǎn);梁光河;谷丙洛;;基于散度和旋度縱橫波分離方法的改進(jìn)[J];地球物理學(xué)報;2013年06期
9 謝飛;李佩;黃中玉;魏修成;朱成宏;;高斯射線束疊前深度偏移成像研究[J];石油物探;2013年01期
10 岳玉波;李振春;錢忠平;張建磊;孫鵬遠(yuǎn);馬光凱;;復(fù)雜地表條件下保幅高斯束偏移[J];地球物理學(xué)報;2012年04期
相關(guān)會議論文 前1條
1 袁茂林;步長城;李振春;黃建平;;起伏地表彈性波高斯束偏移方法研究[A];中國地球物理2013——第二十二專題論文集[C];2013年
相關(guān)博士學(xué)位論文 前1條
1 岳玉波;復(fù)雜介質(zhì)高斯束偏移成像方法研究[D];中國石油大學(xué);2011年
相關(guān)碩士學(xué)位論文 前1條
1 栗學(xué)磊;基于高斯束的彈性波場計算方法研究[D];吉林大學(xué);2013年
，本文編號：2230617
本文鏈接：http://www.sikaile.net/kejilunwen/diqiudizhi/2230617.html
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