变速成图技术在库车坳陷亚肯北地区的应用
|
摘要
库车坳陷亚肯北地区地表起伏大,深层特殊岩性地质体分布不均,制约了该区的圈闭落实。常规的圈闭研究均在固定基准面地震数据下开展,而复杂地区基于固定基准面的地震预测深度与实钻深度误差较大,为此,在研究区开展了基于浮动基准面的变速成图技术研究,其结果表明,相对于固定基准面而言,该方法大大地提高了地震预测精度,为复杂地区圈闭研究提供了有力的手段。
Yakenbei area in Kuqa depression is characterized by high-relief,non-homogenous distribution of deep geological body with special lithology and complicated geologic conditions in surface and subsurface.They are the main reasons for influencing velocity analysis and the trap-scale determination in this area.The conventional research of trap study by seismic data is based on the fixed datum,but the errors between forecast depth by seismic data and actual drilled depth are normally big.So,the velocity-varied mapping technique based on the floating datum in this area is proposed and carried out.The result indicates that the predicted precision by this method is much higher than that by using fixed datum,providing powerful tool for trap study of complex areas.
Yakenbei area in Kuqa depression is characterized by high-relief,non-homogenous distribution of deep geological body with special lithology and complicated geologic conditions in surface and subsurface.They are the main reasons for influencing velocity analysis and the trap-scale determination in this area.The conventional research of trap study by seismic data is based on the fixed datum,but the errors between forecast depth by seismic data and actual drilled depth are normally big.So,the velocity-varied mapping technique based on the floating datum in this area is proposed and carried out.The result indicates that the predicted precision by this method is much higher than that by using fixed datum,providing powerful tool for trap study of complex areas.
引文
[1]潘艳梅,刘玉柱,杨锴.起伏地表速度建模初步研究[J].新疆石油地质,2009,30(4):523-525.
[2]朱广生,杨金华.塔里木盆地巨型速度场的建立[J].新疆石油地质,2002,23(6):507-510.
[3]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.
[4]苏勤,吕彬,田彦灿,等.浮动面叠前深度偏移法在山前带复杂构造成像中的应用[J].新疆石油地质,2009,30(5):560-562.
[5]罗勇,赵峰.复杂地区三维叠前时间偏移技术的应用[J].新疆石油地质,2002,23(5):432-434.
[6]吴超,宁斌,王晓云.优化三维层位控制法速度建场及其应用[J].新疆石油地质,2003,24(5):458-460.
[2]朱广生,杨金华.塔里木盆地巨型速度场的建立[J].新疆石油地质,2002,23(6):507-510.
[3]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.
[4]苏勤,吕彬,田彦灿,等.浮动面叠前深度偏移法在山前带复杂构造成像中的应用[J].新疆石油地质,2009,30(5):560-562.
[5]罗勇,赵峰.复杂地区三维叠前时间偏移技术的应用[J].新疆石油地质,2002,23(5):432-434.
[6]吴超,宁斌,王晓云.优化三维层位控制法速度建场及其应用[J].新疆石油地质,2003,24(5):458-460.
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