基于三维地震剥层的重力界面反演方法及应用
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摘要
西部探区地表、地质条件复杂,导致地震资料品质差,深层成像差,仅靠地震识别深部地层结构属性难度大,可靠性低,多解性强。本文采用基于三维地震剥层的重力界面反演方法,其核心是添加钻井—地质资料约束,在地震构造界面的约束下采用正演"剥皮"技术进行重力场源分离,然后对目标重力异常开展界面反演。正反演阶段采用流行的频率域Parker-Oldenburg迭代算法,保证了反演的快速稳定收敛。结果表明:基于三维地震剥层的重力界面反演方法可以有效剥离浅部高频信号,实现深层目标重力异常的精确分离,进而实现对深层界面的准确标定。在准噶尔盆地东部地区开展深层构造界面反演,结果证实该方法是研究深层地质目标的有效技术手段。
The quality of seismic data is poor and imaging is difficult in case of deep layers because of complex near-surface and underground geological structural conditions in western exploration area,and the structure attributes of deep strata are difficult to be identified only by seismic data due to the inherent non-unique problem and the low resolution problem. The gravity interface inversion method based on 3D seismic stripping was adopted in this study,with the addition of drilling-geological data constraints,which can carry out gravity field source separation by means of forward " stripping" under the seismic structural interface constraints,and then the method could carry out interface inversion for target gravity anomaly.The popular frequency domain Parker-Oldenburg iterative algorithm was adopted in the forward inversion stage,which guaranteed the fast and stable convergence of the inversion.The results show that the three-dimensional seismic peeling method can effectively peel off the high-frequency signals,achieve the accurate acquisition of the gravity anomaly caused by the geological target body and calibrate the deep interface accurately.Deep structural interface inversion was carried out in eastern Junggar basin,which proved the method is an effective method for studying deep geological targets.
The quality of seismic data is poor and imaging is difficult in case of deep layers because of complex near-surface and underground geological structural conditions in western exploration area,and the structure attributes of deep strata are difficult to be identified only by seismic data due to the inherent non-unique problem and the low resolution problem. The gravity interface inversion method based on 3D seismic stripping was adopted in this study,with the addition of drilling-geological data constraints,which can carry out gravity field source separation by means of forward " stripping" under the seismic structural interface constraints,and then the method could carry out interface inversion for target gravity anomaly.The popular frequency domain Parker-Oldenburg iterative algorithm was adopted in the forward inversion stage,which guaranteed the fast and stable convergence of the inversion.The results show that the three-dimensional seismic peeling method can effectively peel off the high-frequency signals,achieve the accurate acquisition of the gravity anomaly caused by the geological target body and calibrate the deep interface accurately.Deep structural interface inversion was carried out in eastern Junggar basin,which proved the method is an effective method for studying deep geological targets.
引文
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[3] Parker R L.The rapid calculation of potential anomalies[J].Geophysical Journal of the Royal Astronomical Society,1972,31:447-455.
[4] Oldenburg D W.The inversion and interpretation of gravity anomalies[J].Geophysics,1974,39:526-536.
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[6]王万银,潘作枢.双界面模型重力场快速正反演问题[J].石油物探,1993,32(2):81-87.Wang W Y,Pan Z S.Fast solution of forward and inverse problems for gravtivy field in a dual interface model[J]. Geophysical Prospecting for Petroleum,1993,32(2):81-87.
[7]王金波,许梦洁,彭瑞仁.小波分频在重力异常界面反演计算过程中的应用[J].高等学校计算数学学报,2001,23(1):68-72.Wang J B,Xu M J,Peng R R.Application of wavelet frequency in the interface invertion of gravity field[J].Journal of Computational Mathematics of Colleges and Universities,2001,23(1):68-72.
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[9]张凤旭,张风琴,孟令顺,等.基于余弦变换的密度界面重力异常正反演研究[J].石油地球物理勘探,2005,40(5):598-602.Zhang F X,Zhang F Q,Meng L S,et al.The forward and inversion research based on cosine transform in the interface invertion of gravity field[J].OGP,2005,40(5):598-602.
[10]肖鹏飞,陈生昌,孟令顺,等.高精度重力资料的密度界面反演[J].物探与化探,2007,31(1):29-33.Xiao P F,Chen S C,Meng L S,et al.The density interface inversion of high-precision gravity data[J]. Geophysical and Geochemical Exploration,2007,31(1):29-33.
[11]胡立天,郝天珧.带控制点的三维密度界面反演方法[J].地球物理学进展,2014,29(6):2498-2503.Hu L T,Hao T Y.The inversion of three-dimensional density interface with control points[J].Progress in Geophysics,2014,29(6):2498-2503.
[12]柴玉璞,贾继军.Parker公式的一系列推广应用及其在石油重力勘探中的应用前景[J].石油地球物理勘探,1990,25(3):321-332.Chai Y P,Jia J J. Parker's formulas in different forms and their applications in petroleum gravity exploration[J].OGP,1990,25(3):321-332.
[13]柯小平,王勇,许厚泽.基于变密度模型的位场界面反演[J].地球物理学进展,2006,21(3):825-829.Ke X P,Wang Y,Xu H Z. Interface depths inversion of potential field data with variable density model[J].Progress in Geophysics,2006,21(3):825-829.
[14]冯娟,孟小红,陈召曦,等.三维密度界面的正反演研究和应用[J].地球物理学报,2014,57(1):287-294.Feng J,Meng X H,Chen Z X,et al.The investigation and application of three-dimensional density interface[J]. Chinese J. Geophys.,2014,57(1):287-294.
[15]张恩会,石磊,李永华,等.基于抛物线密度模型的频率域三维界面反演及其在川滇地区的应用[J].地球物理学报,2015,58(2):556-565.Zhang E H,Shi L,Li Y H,et al. 3D interface inversion of gravity data in the frequency domain using a parabolic density-depth function and the application in Sichuan-Yunnan region[J]. Chinese J.Geophys.,2015,58(2):556-565.
[16]李成立,崔瑞华,刘益中.盆地基底岩性的综合地球物理预测方法———以松辽盆地滨北地区基底岩性预测为例[J].地球物理学报,2011,54(2):491-498.Li C L,Cui R H,Liu Y Z. Comprehensive geophysical prediction method of basement lithology—Example of Binbei area,Songliao Basin[J].Chinese J. Geophys.,2011,54(2):491-498.
[17]谷文彬,陈清礼,王余泉,等.饶阳凹陷虎8北潜山重力三维松约束反演[J].石油地球物理勘探,2016,51(6):1219-1226.Gu W B,Chen Q L,Wang Y Q,et al. Part-constrained 3D gravity inversion for the Hubabei buried hill in Raoyang sag[J]. OGP,2016,51(6):1219-1226.
[18]杨辉,戴世坤,牟永光.三维重力地震剥层联合反演[J].石油地球物理勘探,2004,39(4):468-471.Yang H,Dai S K,Mou Y G. Joint layer-stripped inversion of 3D gravity and seismic data[J].OGP,2004,39(4):468-471.
[19]毛小平,曲赞,吴冲龙.山形重力异常的成因机制及消除方法[J].石油地球物理勘探,1999,34(1):65-70.Mao X P,Qu Z,Wu C L. The genetic mechanism and elimination method of gravity anamaly of mountain shape[J]. OGP,1999,34(1):65-70.
[20]吕铁良,张奎华,林畅松,等.准噶尔盆地木垒凹陷油气来源及成藏特征[J].东北石油大学学报,2016,40(5):1-9.Lyu T L,Zhang K H,Lin C S,et al.Hydrocarbon source and reservoir-forming analysis in Mulei sag,Junggar basin[J]. Journal of Northeast Petroleum University,2016,40(5):1-9.
[21]林隆栋,单江,罗建玲.准噶尔盆地东部油气勘探新启示[J].新疆石油地质,2012,33(6):640-642.Lin L D,Shan J,Luo J L.New insights from petroleum exploration in eastern Junggar basin[J].Xinjiang Petroleum Geology,2012,33(6):640-642.
[2]冯娟,孟小红,陈召曦,等.重力密度界面反演方法研究进展[J].地球物理学进展,2014,29(1):223-228.Feng J,Meng X H,Chen Z X,et al. Review of the gravity density interface invertion[J]. Progress in Geophysics,2014. 29(1):223-228.
[3] Parker R L.The rapid calculation of potential anomalies[J].Geophysical Journal of the Royal Astronomical Society,1972,31:447-455.
[4] Oldenburg D W.The inversion and interpretation of gravity anomalies[J].Geophysics,1974,39:526-536.
[5]关小平.利用Parker公式反演界面的一种有效方法[J].物探化探计算技术,1991,13(3):236-242.Guan X P.An effective and simple approach of subsurface inversion using Parker's equation[J].Computing Techniques for Geophysical and Geochemical Exploration,1991,13(3):236-242.
[6]王万银,潘作枢.双界面模型重力场快速正反演问题[J].石油物探,1993,32(2):81-87.Wang W Y,Pan Z S.Fast solution of forward and inverse problems for gravtivy field in a dual interface model[J]. Geophysical Prospecting for Petroleum,1993,32(2):81-87.
[7]王金波,许梦洁,彭瑞仁.小波分频在重力异常界面反演计算过程中的应用[J].高等学校计算数学学报,2001,23(1):68-72.Wang J B,Xu M J,Peng R R.Application of wavelet frequency in the interface invertion of gravity field[J].Journal of Computational Mathematics of Colleges and Universities,2001,23(1):68-72.
[8]张会战,方剑,张子占.小波分析在重力界面反演中的应用[J].武汉大学学报,2006,31(3):233-236.Zhang H Z,Fang J,Zhang Z Z. Application of wavelet analysis in the interface invertion of gravity field[J].Journal of Wuhan University,2006,31(3):233-236.
[9]张凤旭,张风琴,孟令顺,等.基于余弦变换的密度界面重力异常正反演研究[J].石油地球物理勘探,2005,40(5):598-602.Zhang F X,Zhang F Q,Meng L S,et al.The forward and inversion research based on cosine transform in the interface invertion of gravity field[J].OGP,2005,40(5):598-602.
[10]肖鹏飞,陈生昌,孟令顺,等.高精度重力资料的密度界面反演[J].物探与化探,2007,31(1):29-33.Xiao P F,Chen S C,Meng L S,et al.The density interface inversion of high-precision gravity data[J]. Geophysical and Geochemical Exploration,2007,31(1):29-33.
[11]胡立天,郝天珧.带控制点的三维密度界面反演方法[J].地球物理学进展,2014,29(6):2498-2503.Hu L T,Hao T Y.The inversion of three-dimensional density interface with control points[J].Progress in Geophysics,2014,29(6):2498-2503.
[12]柴玉璞,贾继军.Parker公式的一系列推广应用及其在石油重力勘探中的应用前景[J].石油地球物理勘探,1990,25(3):321-332.Chai Y P,Jia J J. Parker's formulas in different forms and their applications in petroleum gravity exploration[J].OGP,1990,25(3):321-332.
[13]柯小平,王勇,许厚泽.基于变密度模型的位场界面反演[J].地球物理学进展,2006,21(3):825-829.Ke X P,Wang Y,Xu H Z. Interface depths inversion of potential field data with variable density model[J].Progress in Geophysics,2006,21(3):825-829.
[14]冯娟,孟小红,陈召曦,等.三维密度界面的正反演研究和应用[J].地球物理学报,2014,57(1):287-294.Feng J,Meng X H,Chen Z X,et al.The investigation and application of three-dimensional density interface[J]. Chinese J. Geophys.,2014,57(1):287-294.
[15]张恩会,石磊,李永华,等.基于抛物线密度模型的频率域三维界面反演及其在川滇地区的应用[J].地球物理学报,2015,58(2):556-565.Zhang E H,Shi L,Li Y H,et al. 3D interface inversion of gravity data in the frequency domain using a parabolic density-depth function and the application in Sichuan-Yunnan region[J]. Chinese J.Geophys.,2015,58(2):556-565.
[16]李成立,崔瑞华,刘益中.盆地基底岩性的综合地球物理预测方法———以松辽盆地滨北地区基底岩性预测为例[J].地球物理学报,2011,54(2):491-498.Li C L,Cui R H,Liu Y Z. Comprehensive geophysical prediction method of basement lithology—Example of Binbei area,Songliao Basin[J].Chinese J. Geophys.,2011,54(2):491-498.
[17]谷文彬,陈清礼,王余泉,等.饶阳凹陷虎8北潜山重力三维松约束反演[J].石油地球物理勘探,2016,51(6):1219-1226.Gu W B,Chen Q L,Wang Y Q,et al. Part-constrained 3D gravity inversion for the Hubabei buried hill in Raoyang sag[J]. OGP,2016,51(6):1219-1226.
[18]杨辉,戴世坤,牟永光.三维重力地震剥层联合反演[J].石油地球物理勘探,2004,39(4):468-471.Yang H,Dai S K,Mou Y G. Joint layer-stripped inversion of 3D gravity and seismic data[J].OGP,2004,39(4):468-471.
[19]毛小平,曲赞,吴冲龙.山形重力异常的成因机制及消除方法[J].石油地球物理勘探,1999,34(1):65-70.Mao X P,Qu Z,Wu C L. The genetic mechanism and elimination method of gravity anamaly of mountain shape[J]. OGP,1999,34(1):65-70.
[20]吕铁良,张奎华,林畅松,等.准噶尔盆地木垒凹陷油气来源及成藏特征[J].东北石油大学学报,2016,40(5):1-9.Lyu T L,Zhang K H,Lin C S,et al.Hydrocarbon source and reservoir-forming analysis in Mulei sag,Junggar basin[J]. Journal of Northeast Petroleum University,2016,40(5):1-9.
[21]林隆栋,单江,罗建玲.准噶尔盆地东部油气勘探新启示[J].新疆石油地质,2012,33(6):640-642.Lin L D,Shan J,Luo J L.New insights from petroleum exploration in eastern Junggar basin[J].Xinjiang Petroleum Geology,2012,33(6):640-642.
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