横波估算方法探讨
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摘要
叠前地震反演是寻找隐蔽油气藏的有力手段,而横波估算是开展叠前地震反演的必要条件,又是难点之一。目前大部分井缺少横波测井数据,或数据质量差而无法应用。在对比目前常用的3种横波估算方法的基础上,在Y38井应用实例中,采用经验公式和理论计算相结合的方法估算横波速度,旨在探寻有效的方法,获得可使用的横波测井数据。实际应用的结果符合理论上的一般认识,基本可靠。
Prestack seismic inversion is a powerful means to look for concealed oil gas reservoir,and shear wave estimation is a necessary condition and one of the difficulties for the prestack seismic inversion.At present,most of the wells are lack of shear wave logging data,or have poor quality of logging data which can not be used.According to the comparative analysis of three kinds of the commonly used shear wave estimation method,the S-wave velocity in Yong 38 well was estimated through a combination of empirical formula and theoretical calculation in order to explore an effective method and obtain usable shear wave logging data.The results of practical application are consistent with the theory knowledge,and basicly reliable.
Prestack seismic inversion is a powerful means to look for concealed oil gas reservoir,and shear wave estimation is a necessary condition and one of the difficulties for the prestack seismic inversion.At present,most of the wells are lack of shear wave logging data,or have poor quality of logging data which can not be used.According to the comparative analysis of three kinds of the commonly used shear wave estimation method,the S-wave velocity in Yong 38 well was estimated through a combination of empirical formula and theoretical calculation in order to explore an effective method and obtain usable shear wave logging data.The results of practical application are consistent with the theory knowledge,and basicly reliable.
引文
[1]葛瑞·马沃可、塔潘·木克基、杰克·德沃金,等.岩石物理手册[M].合肥:中国科学技术大学出版社,2008:198-211.
[2]马高中、解吉高.岩石的纵、横波速度与密度的规律研究.地球物理学进展[J],2005,20(4):905-910.
[3]孙玉凯、郑雷清.基于常规测井资料的横波时差估算方法及应用.新疆石油地质[J],2009,30(4):521-522.
[4]谢月芳、张纪.岩石物理模型在横波速度估算中的应用.石油物探[J],2012,51(1):65-69.
[2]马高中、解吉高.岩石的纵、横波速度与密度的规律研究.地球物理学进展[J],2005,20(4):905-910.
[3]孙玉凯、郑雷清.基于常规测井资料的横波时差估算方法及应用.新疆石油地质[J],2009,30(4):521-522.
[4]谢月芳、张纪.岩石物理模型在横波速度估算中的应用.石油物探[J],2012,51(1):65-69.