石臼坨凸起陡坡带高速异常区时深转换研究
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摘要
时深转换是利用地震资料进行构造和储层解释的重要环节。前人针对不同地质条件,采用不同方法开展了大量卓有成效的工作。然而凸起陡坡带近源扇体所造成的高速异常具有分布局限、异常显著、变化剧烈的特征,常规时深转换方法均存在一定适用性不足。针对研究区的特定地质条件,提出了石臼坨凸起陡坡带东营组地层高速异常区时深转换技术对策:在成因分析的基础上利用地震相技术刻画高速异常区边界,应用地震速度异常识别技术描述高速异常幅度;地震相、地震速度、井点误差相结合实现时深转换,最终获得更具有地质意义的时深转换结果。实际应用表明,该方法在常速区的时深转换与常规方法基本一致,而在异常区的时深转换更符合地质规律,从而取得了良好的应用效果,有力支持了该含油气构造的储量评价。
Time-depth conversion is an important link in the use of seismic data for structural and reservoir interpretation.Previous researchers carried out a lot of fruitful work by using different methods in different geological conditions.However,the high-velocity anomaly caused by the near-source fan on the steep slope of the uplift has the characteristics of limited distribution,significant anomaly and acute change.There are some problems in the applicability of the conventional time-depth conversion method. According to the specific geological conditions of the study area,this paper proposes the technical countermeasures of time-depth conversion of the high-velocity anomaly area in Dongying Formation strata of the steep slope zone of Shijiutuo uplift. Based on an analysis of the genesis,the seismic phase technology is used to describe the high-velocity anomaly zone boundary; the seismic velocity anomaly identification technique describes the high-velocity anomaly amplitude; combined with the seismic phase,the seismic velocity and the well depth error,this method achieves the time-depth conversion,and finally obtains a more geologically meaningful time-depth conversion result.The practical application shows that the method is consistent with the conventional one in the constant velocity region,and is more consistent with the geological regularity in the anomaly area.Therefore,this methods has achieved good effect in the time-depth conversion which can strongly support the reserve evaluation of the oil and gas structure.
Time-depth conversion is an important link in the use of seismic data for structural and reservoir interpretation.Previous researchers carried out a lot of fruitful work by using different methods in different geological conditions.However,the high-velocity anomaly caused by the near-source fan on the steep slope of the uplift has the characteristics of limited distribution,significant anomaly and acute change.There are some problems in the applicability of the conventional time-depth conversion method. According to the specific geological conditions of the study area,this paper proposes the technical countermeasures of time-depth conversion of the high-velocity anomaly area in Dongying Formation strata of the steep slope zone of Shijiutuo uplift. Based on an analysis of the genesis,the seismic phase technology is used to describe the high-velocity anomaly zone boundary; the seismic velocity anomaly identification technique describes the high-velocity anomaly amplitude; combined with the seismic phase,the seismic velocity and the well depth error,this method achieves the time-depth conversion,and finally obtains a more geologically meaningful time-depth conversion result.The practical application shows that the method is consistent with the conventional one in the constant velocity region,and is more consistent with the geological regularity in the anomaly area.Therefore,this methods has achieved good effect in the time-depth conversion which can strongly support the reserve evaluation of the oil and gas structure.
引文
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[13]王玉梅,李东波,马丽芳,等.速度异常分析与构造成图技术研究[J].石油物探,2003,42(1):102-106.
[14]鲁宝亮,王璞珺,张功成,等.南海北部陆缘盆地基底结构及其油气勘探意义[J].石油学报,2011,32(4):580-587.
[15]张春贺,乔德武,李世臻,等.复杂地区油气地球物理勘探技术集成[J].地球物理学报,2011,54(2):374-387.
[16]潘宏勋,方伍宝.地震速度分析方法综述[J].勘探地球物理进展,2006,29(5):305-311.
[17]彭刚,周东红,李英,等.渤海海域新近系层速度横向异常及其识别技术[J].中国海上油气,2012,24(s1):38-42.
[2]Russell B.A simple seismic imaging exercise[J].The Leading Edge,1998,19(7):885-889.
[3]陈林,邓勇,盖永浩,等.复杂断块构造时深转换方法探讨——以涠西南凹陷为例[J].地球物理学进展,2014,29(3):1121-1127.
[4]张英德,彭佳勇,郝立业,等.海外深水复杂地质条件下时深转换难点及技术对策[J].地球物理学进展,2012,27(4):1484-1492.
[5]陈海清,戴晓云,潘良云,等.时间剖面上的假构造及其解决方法[J].石油地球物理勘探,2009,44(5):509-602.
[6]王波,王雪梅.滨里海盆地盐下构造假象识别及真实形态恢复[J].中国石油勘探,2008,13(1):63-67.
[7]蔡刚,屈志毅.构造复杂地区地震资料速度和成图方法研究与应用[J].天然气地球科学,2005,16(2):246-249.
[8]张华军,肖富森,刘定锦,等.地质构造约束层速度模型在时深转换中的应用[J].石油物探,2003,42(4):521-525.
[9]战春光,王学军,张家震,等.应用变速成图技术解释富台油田砂砾岩体构造[J].石油勘探与开发,2003,30(5):75-76.
[10]张珺.加蓬盐下复杂构造区井控高精度变速成图的方法研究[J].物探与化探,2017,41(3):535-541.
[11]马海珍,雍学善,杨午阳,等.地震速度场建立与变速构造成图的一种方法[J].石油地球物理勘探,2002,37(1):53-59.
[12]李明娟,李守济,牛滨华.地震速度谱在精细深度图制作中的应用[J].石油物探,2004,43(3):272-274.
[13]王玉梅,李东波,马丽芳,等.速度异常分析与构造成图技术研究[J].石油物探,2003,42(1):102-106.
[14]鲁宝亮,王璞珺,张功成,等.南海北部陆缘盆地基底结构及其油气勘探意义[J].石油学报,2011,32(4):580-587.
[15]张春贺,乔德武,李世臻,等.复杂地区油气地球物理勘探技术集成[J].地球物理学报,2011,54(2):374-387.
[16]潘宏勋,方伍宝.地震速度分析方法综述[J].勘探地球物理进展,2006,29(5):305-311.
[17]彭刚,周东红,李英,等.渤海海域新近系层速度横向异常及其识别技术[J].中国海上油气,2012,24(s1):38-42.