库车坳陷盐相关构造建模新进展
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摘要
盐相关构造建模是库车坳陷地震资料处理解释的重要一环。因研究的出发点不同,构造建模的方法和目的也不同,有按盐体形态建模、构造运动方式建模和油气藏模式建模。库车坳陷地震剖面上构造形态畸变大,根据地震成果部署探井,钻探失利井时有发生,其中80%钻探失利井与圈闭不落实有关。圈闭落实程度取决于速度场精度和构造建模。从库车油气勘探实践出发,为了校正盐构造在时间域里畸变现象,采用新的综合分类方法,将地层速度结构、构造形态和岩性有机结合起来,建立了库车坳陷10大盐相关构造新模式。新模式在提高圈闭精度和井位部署发挥了积极作用。
Salt-related structure modeling is an important link in seismic data processing and interpretation of Kuche Depression.Because of the different starting points of research,structure modeling varies a lot in methods and purposes,such as modeling of salt morphology,modeling of structural movement patterns,and modeling of oil and gas reservoir models.On seismic profiles distortion of structural feature of Kuche Depression is serious,so failure drilling wells often occur when arraying wells according to seismic results.80% failure drilling wells are related to the unascertainment of traps.The degree of ascertainment of traps depends on velocity accuracy and structure modeling.Starting from the exploration practice in Kuche Oilfield,to correct the distortion of salt-related structure in time domain,new comprehensive classification methods are used to combine the velocity structure,the structural configuration,and the lithology of the formation rationally.And 10 new models of salt-related structure are established,which plays a positive role in improving trap accuracy and arraying wells.
Salt-related structure modeling is an important link in seismic data processing and interpretation of Kuche Depression.Because of the different starting points of research,structure modeling varies a lot in methods and purposes,such as modeling of salt morphology,modeling of structural movement patterns,and modeling of oil and gas reservoir models.On seismic profiles distortion of structural feature of Kuche Depression is serious,so failure drilling wells often occur when arraying wells according to seismic results.80% failure drilling wells are related to the unascertainment of traps.The degree of ascertainment of traps depends on velocity accuracy and structure modeling.Starting from the exploration practice in Kuche Oilfield,to correct the distortion of salt-related structure in time domain,new comprehensive classification methods are used to combine the velocity structure,the structural configuration,and the lithology of the formation rationally.And 10 new models of salt-related structure are established,which plays a positive role in improving trap accuracy and arraying wells.
引文
[1]贾承造,何登发,雷震宇,等.前陆冲断带油气勘探[M].北京:石油工业出版社,2000.
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[4]梁顺军,梁顺彬.高陡背斜地震剖面高点偏离问题分析和及其校正[J].石油地球物理勘探,2001,36(1):105～114.
[2]梁顺军.平衡观点与地震观点的解释效果分析与评价[J].石油物探,2002,41(3):377～384.
[3]刘光炎,蒋录全.平衡剖面技术与地震资料解释[J].石油地球物理勘探,1995,30(6):833～844.
[4]梁顺军,梁顺彬.高陡背斜地震剖面高点偏离问题分析和及其校正[J].石油地球物理勘探,2001,36(1):105～114.
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