王集地区复杂断裂构造带高精度三维地震成像研究
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摘要
王集地区目的层埋藏浅,北东向与北西向两组断裂相互交切,小断块发育,地层横向速度变化大,小断层难以有效识别。针对上述特点,采用层析反演静校正和拉伸畸变切除技术提高了浅层信号的信噪比,采用叠前时间偏移技术提高复杂断裂带断层的成像精度。在速度模型建立过程中,充分考虑了构造特点及速度变化规律,利用水平与垂直速度切片约束,求取更为精确的速度场。在高精度三维地震成像研究中,对叠前偏移中的偏移孔径、偏移速度和偏移角度等关键参数的选取开展了深入细致的研究。根据倾角确定孔径,通过迭代确定最佳偏移速度,通过综合解释研究,在泌阳凹陷王集地区核三下段发现了一批新的断块圈闭,经钻探在新层系核三下段首次获得工业油流,扩大了该区勘探领域。
In WangJi area,the target intervals are shallowly buried,and the two groups of fractures in northeast and northwest direction are cross-cutting.In addition,small faulted blocks are developed and the velocity has large lateral variation,so the small faults are difficult to identify effectively.Aiming at the problems,we adopted tomography inversion statics and stretching distortion cut technology to increase the signal-to-noise ratio of shallow signals,and used pre-stack time migration technology to increase the imaging accuracy of complex faulted zone.During the velocity model building,we took full account of the structure characteristics and the law of velocity variation,under the constraint of horizontal and vertical velocity slices;more accurate velocity field was obtained.In the research of high-precision 3D seismic imaging,we focused on the selection of the key parameters of pre-stack migration,such as migration aperture,migration velocity and migration angle.We selected aperture by dip and choose best migration velocity by iteration. Through the integrated interpretation,a group of new traps in HeⅢlower segment,industrial oil flow were obtained in HeⅢof the new drilled formations for the first time,which broadened the exploration scale of the area.
In WangJi area,the target intervals are shallowly buried,and the two groups of fractures in northeast and northwest direction are cross-cutting.In addition,small faulted blocks are developed and the velocity has large lateral variation,so the small faults are difficult to identify effectively.Aiming at the problems,we adopted tomography inversion statics and stretching distortion cut technology to increase the signal-to-noise ratio of shallow signals,and used pre-stack time migration technology to increase the imaging accuracy of complex faulted zone.During the velocity model building,we took full account of the structure characteristics and the law of velocity variation,under the constraint of horizontal and vertical velocity slices;more accurate velocity field was obtained.In the research of high-precision 3D seismic imaging,we focused on the selection of the key parameters of pre-stack migration,such as migration aperture,migration velocity and migration angle.We selected aperture by dip and choose best migration velocity by iteration. Through the integrated interpretation,a group of new traps in HeⅢlower segment,industrial oil flow were obtained in HeⅢof the new drilled formations for the first time,which broadened the exploration scale of the area.
引文
[1]赵雨晴,张永华,罗家群.泌阳凹陷复杂断裂带三维地震资料精细解释方法和效果分析[J].石油物探, 2009,48(5):524-530
[2]邱荣华,李连生,张永华.泌阳凹陷北部斜坡带油气富集控制因素与勘探技术[J].石油天然气学报, 2006,28(2):39-41
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[5]邱荣华,孙耀华,张永华,等.泌阳凹陷新庄地区浅层三维地震勘探[J].石油与天然气地质,2005,26(2): 242-245
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[7]张永华,杨道庆,罗家群.泌阳凹陷陡坡带高精度三维地震攻关研究与效果[J].石油地球物理勘探, 2009,44(1):111-1]4
[8]Wu R S,Chen L.Directional illumination analysis using beamlet decomposition and propagation[J].Geophysics, 2006,71(4):147-159
[9]张永华,马义忠,田小敏.泌阳凹陷新庄地区浅层复杂断块群成像研究[J].石油物探,2008,47(4): 376-380
[10]张永华,罗家群,田小敏.高精度三维地震在泌阳凹陷北部复杂断块群勘探中的应用[J].石油物探, 2005,44(3):280-283
[11]Komatitsch D,Tromp J.Spectral-element simulations of global seismic wave propagation-II:three dimensional models,oceans,rotation and self-gravitation [J].Geophysical Journal International,2002,150 (1):303-318
[12]余功铭,张永华,梁运基.复杂断裂构造带三维地震勘探技术及效果[J].新疆石油地质,2007,28(1): 101-104
[13]方伍宝.三维叠前深度偏移的建模技术[J].石油物探,2002,41(2):132-135
[14]孙建国.Kirchhoff型真振幅偏移与反偏移[J].勘探地球物理进展,2002,25(6):1-5
[2]邱荣华,李连生,张永华.泌阳凹陷北部斜坡带油气富集控制因素与勘探技术[J].石油天然气学报, 2006,28(2):39-41
[3]熊翥.复杂地区地震数据处理思路[M].北京:石油工业出版社,2002:95-104
[4]张永华.三维地震资料综合解释方法探讨[J].石油物探,2004,43(1):49-53
[5]邱荣华,孙耀华,张永华,等.泌阳凹陷新庄地区浅层三维地震勘探[J].石油与天然气地质,2005,26(2): 242-245
[6]樊卫花,杨长春,孙传文.三维地震资料叠前时间偏移应用研究[J].地球物理学进展,2007,22(3): 836-842
[7]张永华,杨道庆,罗家群.泌阳凹陷陡坡带高精度三维地震攻关研究与效果[J].石油地球物理勘探, 2009,44(1):111-1]4
[8]Wu R S,Chen L.Directional illumination analysis using beamlet decomposition and propagation[J].Geophysics, 2006,71(4):147-159
[9]张永华,马义忠,田小敏.泌阳凹陷新庄地区浅层复杂断块群成像研究[J].石油物探,2008,47(4): 376-380
[10]张永华,罗家群,田小敏.高精度三维地震在泌阳凹陷北部复杂断块群勘探中的应用[J].石油物探, 2005,44(3):280-283
[11]Komatitsch D,Tromp J.Spectral-element simulations of global seismic wave propagation-II:three dimensional models,oceans,rotation and self-gravitation [J].Geophysical Journal International,2002,150 (1):303-318
[12]余功铭,张永华,梁运基.复杂断裂构造带三维地震勘探技术及效果[J].新疆石油地质,2007,28(1): 101-104
[13]方伍宝.三维叠前深度偏移的建模技术[J].石油物探,2002,41(2):132-135
[14]孙建国.Kirchhoff型真振幅偏移与反偏移[J].勘探地球物理进展,2002,25(6):1-5
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