地震反射同相轴畸变的正演分析方法——在阿姆河右岸区块的应用
|
摘要
针对土库曼斯坦阿姆河右岸区块目的层沉积相带变化和上覆盐膏层受挤压变形引起的地震反射同相轴畸变问题,为减少解释的多解性,通过分析研究区沉积地层特征,并结合钻井和测井资料,设计了坡折带相变区和中石膏受挤压变形两类地震地质模型。在波动方程理论的指导下对模型进行了正演模拟,分析了各类正演结果的地震响应特征,并与实际地震剖面进行了比较,为坡折带相变区的层位标定及对比追踪找到了确实可信的理论依据。分析认为:盐下部分同相轴错断是中石膏层变形所引起的断裂假象。该模型正演结果较好地解决了研究区解释中对比方案难以确定的问题,为开展下一步的解释工作奠定了基础。
In the Amu Darya Right Bank Block,Turkmenistan,the variation of sedimentary facies belt and the deformation of exploration target caused by the compression of the overlying salt layer are significant,resulting in event distortion.In order to eliminate the ambiguity of seismic interpretation,we built two seismogeologic models through analyzing the features of the sedimentary formations in the study area and the drilling and log data.One is for facies change in the slope break zone,and the other is for the deformation of the middle gypsum layer from compression.The forward modeling is performed under the guidance of wave equation theory.The seismic responses of various forward modeling results are analyzed and compared with real seismic sections.These studies provide a reliable theoretical basis for horizon calibration and tracing in the facies change belt of the slope break zone.It is believed that the faulting of some pre-salt events is an artifact caused by the deformation of the middle gypsum layer.The forward modeling results provide a solid basis for future seismic interpretation.
In the Amu Darya Right Bank Block,Turkmenistan,the variation of sedimentary facies belt and the deformation of exploration target caused by the compression of the overlying salt layer are significant,resulting in event distortion.In order to eliminate the ambiguity of seismic interpretation,we built two seismogeologic models through analyzing the features of the sedimentary formations in the study area and the drilling and log data.One is for facies change in the slope break zone,and the other is for the deformation of the middle gypsum layer from compression.The forward modeling is performed under the guidance of wave equation theory.The seismic responses of various forward modeling results are analyzed and compared with real seismic sections.These studies provide a reliable theoretical basis for horizon calibration and tracing in the facies change belt of the slope break zone.It is believed that the faulting of some pre-salt events is an artifact caused by the deformation of the middle gypsum layer.The forward modeling results provide a solid basis for future seismic interpretation.
引文
[1]雷雪,李忠,翟中华.川中地区中三叠统雷口坡组构造特征及解释方法探讨[J].石油物探,2005,44(2):137-141.
[2]刘丽华,刘定锦,李乐.川中龙女寺地区雷一1亚段构造解释方法[J].天然气工业,2009,29(2):45-48.
[3]漆家福.油区构造解析[M].东营:石油大学出版社,2001:6-7,10-11,160-184.
[4]侯艳平,孙向阳,任建业.东淮凹陷盐滑脱变形构造及其在油气勘探中的意义[J].石油与天然气地质,2004,25(1):58-61.
[5]季玉新,韩文功,沈财余.胜利油田典型地质模型的地震正演[J].石油地球物理勘探,2006,41(5):561-572.
[6]张家震,马士忠,王新峰,等.车镇凹陷北部陡坡带下古生界油气分布控制因素[J].西南石油学院学报,2005,27(4):5-8.
[7]宋建国,刘励云,周廷全.陡坡带复杂地质模型的建立[J].石油地球物理勘探,2008,43(4):473-478.
[2]刘丽华,刘定锦,李乐.川中龙女寺地区雷一1亚段构造解释方法[J].天然气工业,2009,29(2):45-48.
[3]漆家福.油区构造解析[M].东营:石油大学出版社,2001:6-7,10-11,160-184.
[4]侯艳平,孙向阳,任建业.东淮凹陷盐滑脱变形构造及其在油气勘探中的意义[J].石油与天然气地质,2004,25(1):58-61.
[5]季玉新,韩文功,沈财余.胜利油田典型地质模型的地震正演[J].石油地球物理勘探,2006,41(5):561-572.
[6]张家震,马士忠,王新峰,等.车镇凹陷北部陡坡带下古生界油气分布控制因素[J].西南石油学院学报,2005,27(4):5-8.
[7]宋建国,刘励云,周廷全.陡坡带复杂地质模型的建立[J].石油地球物理勘探,2008,43(4):473-478.
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心