东濮凹陷地震速度场建立方法与应用研究
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摘要
由于东濮凹陷勘探目标更加隐蔽和复杂,对地震勘探精度的要求越来越高,提出叠加/偏移速度联合反演求取层速度的新方法,提高了层速度计算精度。通过研究速度场建立方法,形成了利用地震速度、测井、钻井和构造层位等多种信息联合建立速度场技术,获得了反映速度宏观分布规律并与井符合良好的速度场。结合地震速度的概念和具体应用,明确了各种速度类型之间关系及其适用性,为地震勘探各阶段提供了较全面的速度场方案。完成东濮凹陷全区的地震速度数据坐标定位和统一格式转换,建成了全区速度库,为地震成像、变速成图、区域地层压力预测等提供了技术支持,并获得了良好效果。
Seismic exploration accuracy meets higher and higher requirements since the exploration targets in Dongpu Sag tend to be more subtle and complicated.For this,this paper puts forward a new method for acquiring horizon velocity based on joint inversion of stack velocity and migration velocity,improving the accuracy of velocity calculation.Through study on methods for establishing velocity field,the technology of establishing velocity field on the basis of combining such information as seismic velocity,logging,drilling and structural horizon is developed,and the velocity field reflecting the macroscopic law of velocity distribution is obtained,which is in good agreement with the well.Integrating the concept and application of seismic velocity,this paper defines the correlation of various types of velocity and its applicability,providing a complete velocity field solution for different phases of seismic exploration.Based on coordinate positioning and unified format transformation of seismic velocity data,the velocity base of all over Dongpu Sag is established,supporting seismic imaging,variable velocity mapping,and prediction of regional formation pressure technically,and yielding good results.
Seismic exploration accuracy meets higher and higher requirements since the exploration targets in Dongpu Sag tend to be more subtle and complicated.For this,this paper puts forward a new method for acquiring horizon velocity based on joint inversion of stack velocity and migration velocity,improving the accuracy of velocity calculation.Through study on methods for establishing velocity field,the technology of establishing velocity field on the basis of combining such information as seismic velocity,logging,drilling and structural horizon is developed,and the velocity field reflecting the macroscopic law of velocity distribution is obtained,which is in good agreement with the well.Integrating the concept and application of seismic velocity,this paper defines the correlation of various types of velocity and its applicability,providing a complete velocity field solution for different phases of seismic exploration.Based on coordinate positioning and unified format transformation of seismic velocity data,the velocity base of all over Dongpu Sag is established,supporting seismic imaging,variable velocity mapping,and prediction of regional formation pressure technically,and yielding good results.
引文
[1]R.E.谢里夫,L.P.吉尔达特.勘探地震学[M].北京:石油工业出版社,1999:1-736.
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[5]温声明,杨德兴,王贵重,等.层速度替换建场法在高陡构造区的应用[J].石油地球物理勘探,2006,41(3):308-312.
[6]邵雨,李学义,孔智勇,等.模型速度建场方法的应用研究[J].石油地球物理勘探,2003,38(6):675-679.
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[8]金博,刘震,邬长武,等.地震速度岩性解释系统的应用——以准噶尔盆地东部阜东斜坡带为例[J].新疆石油地质,2004,25(1):47-49.
[9]叶勇,郑雄.偏移速度分析技术新进展[J].勘探地球物理进展,2003,26(2):136-142.
[10]张中杰.地震各向异性研究进展[J].地球物理学进展,2002,17(2):281-293.
[11]王兴岭,冯斌,李心宁.井约束地震压力预测在滚动勘探开发中的应用[J].石油地球物理勘探,2002,37(4):391-394.
[12]Rob Holt.Constraining anisotropy-Lessons from2D modeling.CSPG-CSEG-CWLS Convention,2006:295-299.
[13]韩保清,蔡其新,张树海,等.东濮凹陷富油气区带高精度三维地震实践与认识[J].中国石油勘探,2009,14(6):25-36.
[14]马建波,李绍康,银燕惠,等.东濮凹陷高密度各向异性自动速度分析[J].中国石油勘探,2009,14(6):69-71.
[2]Sava P,Biondi B.Diffraction-focusing migration velocity analysis.Expanded Abstracts of74th Annual International SEG Meeting,2004:2389-2395.
[3]朱广生,杨金华,段天友,等.塔里木盆地巨型速度场的建立[J].新疆石油地质,2002,23(6):507-510.
[4]王棣,王华忠,马在田,等.叠前时间偏移方法综述[J].勘探地球物理进展,2004,27(5):313-320.
[5]温声明,杨德兴,王贵重,等.层速度替换建场法在高陡构造区的应用[J].石油地球物理勘探,2006,41(3):308-312.
[6]邵雨,李学义,孔智勇,等.模型速度建场方法的应用研究[J].石油地球物理勘探,2003,38(6):675-679.
[7]潘宏勋,方伍保.地震速度分析方法综述[J].勘探地球物理进展,2006,29(5):305-311.
[8]金博,刘震,邬长武,等.地震速度岩性解释系统的应用——以准噶尔盆地东部阜东斜坡带为例[J].新疆石油地质,2004,25(1):47-49.
[9]叶勇,郑雄.偏移速度分析技术新进展[J].勘探地球物理进展,2003,26(2):136-142.
[10]张中杰.地震各向异性研究进展[J].地球物理学进展,2002,17(2):281-293.
[11]王兴岭,冯斌,李心宁.井约束地震压力预测在滚动勘探开发中的应用[J].石油地球物理勘探,2002,37(4):391-394.
[12]Rob Holt.Constraining anisotropy-Lessons from2D modeling.CSPG-CSEG-CWLS Convention,2006:295-299.
[13]韩保清,蔡其新,张树海,等.东濮凹陷富油气区带高精度三维地震实践与认识[J].中国石油勘探,2009,14(6):25-36.
[14]马建波,李绍康,银燕惠,等.东濮凹陷高密度各向异性自动速度分析[J].中国石油勘探,2009,14(6):69-71.
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