摘要
为了研究高陡倾角构造精细成像,常规的地震勘探方法和成像技术均不能取得较好效果。而井间地震是在井中激发和接收地震波,避免了低降速带对地震波场的吸收作用,可以获得高信噪比地震资料;同时逆时偏移成像方法能够对高陡倾角等复杂构造进行准确成像。因此,本文结合井间地震和逆时偏移方法的优点,针对X煤田开采中面对的高陡倾角煤层构造利用井间地震逆时偏移方法进行成像研究。通过对高陡倾角构造在地面地震观测系统、VSP观测系统和井间地震观测系统下使用逆时偏移方法进行成像,结果表明井间地震逆时偏移方法在高陡倾角构造中具有良好的成像效果,可以有效指导高陡倾角构造煤层精细勘探。
In order to study the fine imaging of high steep dip structures,conventional seismic survey methods and imaging techniques cannot achieve good results.In contrast,cross-well seismic excites and receives seismic waves in the well,avoiding the absorption of the seismic wave field by the low drop velocity zone,and can obtain high signal-to-noise ratio seismic data.Meanwhile,the reverse time migration imaging method can accurately image complex structures such as high steep dip.Therefore,this paper combines the advantages of cross-well seismic and reverse time migration methods to investigate the imaging of high steep dip coal seam structures in the X coalfield.The high steep dip structures are imigrated by using inverse time migration method in surface seismic observation systenm,VSP observation system and cross-well seismic observation system.The results show that the cross-well seismic reverse time migration method has good imaging effects in high steep dip structures and can effectively guide the fine exploration of coal seams in high steep dip structures.
作者
姚凤鸣
霍亮
任广莹
陈伟
YAO Fengming;HUO Liang;REN Guangying;CHEN Wei(College of the Geoscience and Engineering,Xi'an Shiyou University,Xi'an Shaanxi 710065,China)
出处
《石油化工应用》
CAS
2024年第1期86-91,共6页
Petrochemical Industry Application
关键词
井间地震
VSP
高陡倾角构造
逆时偏移
cross-well seismic
VSP
high steep dip structures
reverse time migration
