准噶尔盆地南缘玛纳斯背斜速度成图方法研究
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摘要
随着地质勘探的不断深入,对构造图的精度要求也越来越高,因此,对速度场建立和变速构造成图方法也提出了更高的要求。在复杂构造地区,特别是逆冲断裂带较为发育的山前高陡构造区,常规的速度分析和常速成图方法得到的构造图精度低,已不能满足实际生产的需要。本文对二维地震山前高陡构造速度场建立与变速构造成图方法进行了深入研究,提出采用上、下盘分别建立速度场,利用钻测井资料分析区域速度变化规律约束层速度,总结出了适合于复杂构造区的速度场建立与变速成图方法。通过在准噶尔盆地南缘的实际应用,有效地提高了复杂地区速度场和构造图的精度,具有良好的推广应用前景。
In the complex structure area,especially the high steep structural region where the thrust belt is well developed,the structural map which is based on the conventional velocity analyzing and conventional mapping is not so precious and can't meet the production requirements.The paper has made an intensive study on building velocityfield model in the submountain high steep structural region and structure mapping.Based on the former sucessful experience,it builds velocity fields in upper wall and foot wall respectively and restricts the internal velocity with the changeing law of drilling velocity.A velocity-field model building and mapping method for the complex structure areas is summed up.The practical applications in south margin of Junggar Basin show that this method can improve the precision of building velocity field and structure mapping in compex structure areas,and has a good application prospect.
In the complex structure area,especially the high steep structural region where the thrust belt is well developed,the structural map which is based on the conventional velocity analyzing and conventional mapping is not so precious and can't meet the production requirements.The paper has made an intensive study on building velocityfield model in the submountain high steep structural region and structure mapping.Based on the former sucessful experience,it builds velocity fields in upper wall and foot wall respectively and restricts the internal velocity with the changeing law of drilling velocity.A velocity-field model building and mapping method for the complex structure areas is summed up.The practical applications in south margin of Junggar Basin show that this method can improve the precision of building velocity field and structure mapping in compex structure areas,and has a good application prospect.
引文
[1]冯许魁,任尚斌.复杂高陡构造区变速成图技术[J].石油地球物理勘探,2002,37(专刊):172-175.
[2]漆立新,顾汉明.天山南缘亚肯北地区速度建场因素分析[J].石油地球物理勘探,2007,42(4):407-412.
[3]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.
[4]冯全雄,黄兆林,葛勇.模型研究指导层速度解释方法探索及应用[J].中国海上油气,2005,3(5):74-79.
[5]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,2003,6(17):673-679.
[6]王世瑞,李绪勇.速度场建场方法研究及在吐哈盆地的应用[J].石油地球物理勘探,1997,32(增刊1):86-94.
[7]李向科.加拿大阿萨巴斯卡焦油砂岩加热区带的地震速度模型[J].特种油气藏,2002,9(5):101-104.
[2]漆立新,顾汉明.天山南缘亚肯北地区速度建场因素分析[J].石油地球物理勘探,2007,42(4):407-412.
[3]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.
[4]冯全雄,黄兆林,葛勇.模型研究指导层速度解释方法探索及应用[J].中国海上油气,2005,3(5):74-79.
[5]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,2003,6(17):673-679.
[6]王世瑞,李绪勇.速度场建场方法研究及在吐哈盆地的应用[J].石油地球物理勘探,1997,32(增刊1):86-94.
[7]李向科.加拿大阿萨巴斯卡焦油砂岩加热区带的地震速度模型[J].特种油气藏,2002,9(5):101-104.
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