叠前深度偏移技术在塔河地区盐下成像中的应用
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摘要
塔河油田南石炭系巴楚组盐体分布面积约1500km~2,S106井在盐下奥陶系获工业油气流,表明盐下具有巨大的油气勘探潜力。针对塔河油田南盐下勘探目标的特点,通过综合研究,结合叠前时间偏移、叠前深度偏移、层析成像等速度建模工具,建立了目标区准确的浅深层速度模型,实施了目标盐体区三维地震叠前深度偏移成像处理,提高了盐下目的层的成像精度,突出了与塔河油田下奥陶统碳酸盐岩溶洞发育有关的地震信息,提高了地震属性的保真度,对提高塔河油田盐下储层预测精度具有积极的意义。
The Carboniferous salt body of Bachu Formation in southern Tahe oilfield covers an area of about 1500
km~2. Commercial hydrocarbon flow is encountered in the subsalt Ordovician formations in well S106, revealing
that the subsalt formations are potential targets for oil and gas exploration. By taking the characteristics of the
subsalt targets into account, the author established the sha1low and deep velocity model of the survey area with
velocity analysis tools such as prestack migration, prestack depth migration, and tomography, and performed
prestack depth migration on the targets. Precise velocity model and prestack depth migration ensure the definition
of seismic images of the targets.
The Carboniferous salt body of Bachu Formation in southern Tahe oilfield covers an area of about 1500
km~2. Commercial hydrocarbon flow is encountered in the subsalt Ordovician formations in well S106, revealing
that the subsalt formations are potential targets for oil and gas exploration. By taking the characteristics of the
subsalt targets into account, the author established the sha1low and deep velocity model of the survey area with
velocity analysis tools such as prestack migration, prestack depth migration, and tomography, and performed
prestack depth migration on the targets. Precise velocity model and prestack depth migration ensure the definition
of seismic images of the targets.
引文
1 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
2 姜忠良,范运臣,王睿祥等.叠前深度偏移技术在东濮凹陷的应用[J].勘探地球物理进展,2003,26(3) :208～210
3 赵中全.高效地建立叠前深度偏移的速度模型[J].国外油气勘探,1997,9(2) :206～209
4 马在田.论反射地震偏移成像[J].勘探地球物理进展,2002,25(3) :1～5
5 张旭光.利用地震信息检测碳酸盐岩溶洞[J].石油物探,2002,41(3) :359～362
6 马建波.3-D叠前地震偏移对地震相干性和振幅变化的影响[J].国外油气勘探,2000,12(5) :577～585
2 姜忠良,范运臣,王睿祥等.叠前深度偏移技术在东濮凹陷的应用[J].勘探地球物理进展,2003,26(3) :208～210
3 赵中全.高效地建立叠前深度偏移的速度模型[J].国外油气勘探,1997,9(2) :206～209
4 马在田.论反射地震偏移成像[J].勘探地球物理进展,2002,25(3) :1～5
5 张旭光.利用地震信息检测碳酸盐岩溶洞[J].石油物探,2002,41(3) :359～362
6 马建波.3-D叠前地震偏移对地震相干性和振幅变化的影响[J].国外油气勘探,2000,12(5) :577～585
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