土库曼斯坦阿姆河地区点礁储层地震正演模拟及响应
|
摘要
针对阿姆河右岸地区点礁储层发育的类型和特点,通过利用实钻井信息建立地质模型,采用高阶有限差分方法,模拟了基于实际介质模型条件下的点礁地震波场响应。模拟结果表明,在阿姆河右岸地区,点礁的地震响应为丘形和透镜状反射,在地震剖面上有局部高点,有向上穹隆冲顶现象;点礁顶面具有较强的反射特征,内部则表现为断续的、成层性较差的反射结构,底部反射近于平直。不同频率子波正演剖面表明,随着子波频率的增加,点礁岩层下部的反射能量变强。子波频率大于30 Hz时,厚度大于50 m的点礁内部会出现强轴反射。
A seismic geological model was set up based on the type and characteristics of point-reef reservoir growth and information of drilled wells in the right side of Amudarya Area.By using high-order finite difference method,a forward seismic modeling was carried out to simulate the seismic response of point reefs.The result shows that seismic response of point reefs is characterized by mound and lens seismic reflection.Features of point reefs in the seismic section are local peak and upward domical protrusion,strong seismic reflection on the top of point reefs,discrete and poor bedded seismic reflection inside the point reefs,flatten reflection on the bottom of point reefs.The forward seismic modeling sections of different frequency wavelets reveal reflection,strength on the bottom of point reefs increases with the wavelet frequency increase.The point reefs are strong reflection when wavelet frequency is more than 30 Hz and thickness of point reefs is more than 50 m.
A seismic geological model was set up based on the type and characteristics of point-reef reservoir growth and information of drilled wells in the right side of Amudarya Area.By using high-order finite difference method,a forward seismic modeling was carried out to simulate the seismic response of point reefs.The result shows that seismic response of point reefs is characterized by mound and lens seismic reflection.Features of point reefs in the seismic section are local peak and upward domical protrusion,strong seismic reflection on the top of point reefs,discrete and poor bedded seismic reflection inside the point reefs,flatten reflection on the bottom of point reefs.The forward seismic modeling sections of different frequency wavelets reveal reflection,strength on the bottom of point reefs increases with the wavelet frequency increase.The point reefs are strong reflection when wavelet frequency is more than 30 Hz and thickness of point reefs is more than 50 m.
引文
[1]卫平生,刘全新,张景廉,等.再论生物礁与大油气田的关系[J].石油学报,2006,27(2):38~42.
[2]刘雯林.气田开发地震技术[M].北京:石油工业出版社,1996.4~6.
[3]吴国忱,王华忠,马在田.常速度梯度射线追踪与二维速度反演[J].石油物探,2003,42(4):434~440.
[4]Keho T H,Beydoun WB.Paraxial ray Kirchhoff migration[J].Geophysics,1988,53(12):1540~1546.
[5]宋炜,王守东,王尚旭.井间地震资料克希霍夫积分法叠前深度偏移[J].石油物探,2004,43(6):523~527.
[6]Stolt R H.Migration by Fourier transform[J]Geophysics,1978,43(1):23~48.
[7]Ristow D,Ruhl T.Fourier finite-difference migration[J].Geophysics,1994,59(12):1882~1893.
[8]Claerbout J F.Towards a unified theory of reflection mapping[J].Geophysics,1971,36(4):467~581.
[9]Schneider W A,Ranzinger K A,Balch A H,et al.Adynamic programming approach to first travel-ti me computation in media witharbiarily distributed velocities[J].Geophysics,1992,57(1):39~50.
[10]Schneider W A.Robust and efficient upwindfinite-diference travel-ti me calculationsin three di mensions[J].Geophysics,1995,60(4):1108~1117.
[11]Kitchenside P,Albertin U,Chang Wenfong,et al.Comparingfinite-difference and Kirchhoff prestack depth migration[J].ExpandedAbstract of 71st SEGMtg,2001:856~859.
[12]李振春.地震成像理论与方法[M].东营:石油大学出版社,2004.42~123.
[13]董良国,马在田,曹景忠,等.一阶弹性波方程交错网格高阶差分解法[J].地球物理学报,2000,43(3):411~419.
[14]董良国,马在田,曹景忠.一阶弹性波方程交错网格高阶差分解法稳定性研究[J].地球物理学报,2000,43(6):856~864.
[2]刘雯林.气田开发地震技术[M].北京:石油工业出版社,1996.4~6.
[3]吴国忱,王华忠,马在田.常速度梯度射线追踪与二维速度反演[J].石油物探,2003,42(4):434~440.
[4]Keho T H,Beydoun WB.Paraxial ray Kirchhoff migration[J].Geophysics,1988,53(12):1540~1546.
[5]宋炜,王守东,王尚旭.井间地震资料克希霍夫积分法叠前深度偏移[J].石油物探,2004,43(6):523~527.
[6]Stolt R H.Migration by Fourier transform[J]Geophysics,1978,43(1):23~48.
[7]Ristow D,Ruhl T.Fourier finite-difference migration[J].Geophysics,1994,59(12):1882~1893.
[8]Claerbout J F.Towards a unified theory of reflection mapping[J].Geophysics,1971,36(4):467~581.
[9]Schneider W A,Ranzinger K A,Balch A H,et al.Adynamic programming approach to first travel-ti me computation in media witharbiarily distributed velocities[J].Geophysics,1992,57(1):39~50.
[10]Schneider W A.Robust and efficient upwindfinite-diference travel-ti me calculationsin three di mensions[J].Geophysics,1995,60(4):1108~1117.
[11]Kitchenside P,Albertin U,Chang Wenfong,et al.Comparingfinite-difference and Kirchhoff prestack depth migration[J].ExpandedAbstract of 71st SEGMtg,2001:856~859.
[12]李振春.地震成像理论与方法[M].东营:石油大学出版社,2004.42~123.
[13]董良国,马在田,曹景忠,等.一阶弹性波方程交错网格高阶差分解法[J].地球物理学报,2000,43(3):411~419.
[14]董良国,马在田,曹景忠.一阶弹性波方程交错网格高阶差分解法稳定性研究[J].地球物理学报,2000,43(6):856~864.
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心