变速成图技术在二连盆地赛汉塔拉凹陷低幅度构造解释中应用
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摘要
二连盆地赛汉塔拉凹陷地层横向速度变化大,在寻找低幅度构造,用常规速度量板进行地震时深转换,已无法满足高精度构造分析的需要。构造成图精度取决于反射时间的拾取精度和应用于时深转换的速度场精度。在二连盆地赛汉塔拉凹陷低幅度构造解释中,采用了波组闭合法在叠偏剖面上进行精细层位追踪,并采用变速构造成图方法即采用层位反偏移技术对零偏移距时间域T 0图进行空间偏移归位,进行逐层层速度反演与三维射线追踪时深转换构造成图。提高了低幅度构造成图精度,是寻找低幅度构造和高精度勾绘构造图的一种新方法。
In Saihantala Hollow Erlian Basin the strata lateral velocity change greatly.The method of conventional time-to-depth conversion can't attain the requirements of high-resolution structural analysis during low amplitude structure interpretation.The structure mapping precision depends on picking up reflection time correctly and getting accurate velocity field being used in time-to-depth conversion.During low amplitude structure interpretation in Saihantala Hollow Erlian Basin wave group closure method has been used to track horizons precisely in poststack migrated seismic sections and varying velocity mapping method has also been used which applied horizontal anti-shifting technique to make spatial shifting and homing of the nil shifting distance time domain T0 map and to make inversion of interval velocity to form the depth structural map.This improves structure-contour map precision.So it is a new method to find low amplitude structure and plot structure-contour map with high precision.
In Saihantala Hollow Erlian Basin the strata lateral velocity change greatly.The method of conventional time-to-depth conversion can't attain the requirements of high-resolution structural analysis during low amplitude structure interpretation.The structure mapping precision depends on picking up reflection time correctly and getting accurate velocity field being used in time-to-depth conversion.During low amplitude structure interpretation in Saihantala Hollow Erlian Basin wave group closure method has been used to track horizons precisely in poststack migrated seismic sections and varying velocity mapping method has also been used which applied horizontal anti-shifting technique to make spatial shifting and homing of the nil shifting distance time domain T0 map and to make inversion of interval velocity to form the depth structural map.This improves structure-contour map precision.So it is a new method to find low amplitude structure and plot structure-contour map with high precision.
引文
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[3]陈广军.低幅度构造地震解释探讨,石油物探,2003,42(3),395-398.
[4]王树华等.变速成图方法及应用研究,中国海洋大学学报,2003,34(1),139-146.
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[7]焦存礼等.变速成图系统技术关键及其在塔中西部的应用.物探与化探,2003,27(3),189-193.
[8]马海珍等.地震速度场建立与变速构造成图的一种方法,石油地球物理勘探,2002,37(1),53-56.
[9]王允清等.二维地震偏移剖面解释和数据归位成图方法,石油物探,2000,39(1),118-119.
[2]唐建人等.变速空校t0曲线射线空间归位成图方法,大庆石油地质与开发,1994,13(3):67-70.
[3]陈广军.低幅度构造地震解释探讨,石油物探,2003,42(3),395-398.
[4]王树华等.变速成图方法及应用研究,中国海洋大学学报,2003,34(1),139-146.
[5]华北油田地质志编.中国石油地质志—卷五华北油田.石油工业出版社,1991.533-556.
[6]张尚锋.内蒙二连盆地赛汉塔拉凹陷构造特征及油气远景,西南石油学院学报,1998,20(2),35-36.
[7]焦存礼等.变速成图系统技术关键及其在塔中西部的应用.物探与化探,2003,27(3),189-193.
[8]马海珍等.地震速度场建立与变速构造成图的一种方法,石油地球物理勘探,2002,37(1),53-56.
[9]王允清等.二维地震偏移剖面解释和数据归位成图方法,石油物探,2000,39(1),118-119.
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