摘要
当合成记录或VSP资料与地震资料部分同相匹配不好时,并不一定是资料出了问题,而应当从极性上去考虑;正确地判定极性,才能提高地震解释成果的可靠性。对低速带的静校正中,在地形复杂而低速带厚度又相当大时,用垂向深度计算静校正量将可能出现不允许接受的误差;这时应该考虑用倾斜面的法线深度计算静校正量。在低信噪比和低倾角条件下(或地下构造复杂的褶皱区),应该充分利用速度资料,注意速度的反转现象;在与地震剖面对应的速度谱上,速度反转点往往就是断层的断点,系统地处理这些断点,就可能得到真正的断层位置。
Polarity of seismic wave is well concerned by geophysicists f or its effect on accuracy of geologic calibration of horizons on a seismic profile .When composite traces or VSP information is inconsistent with events of some seismic data,this is not something the matter for the seismic data but the po larity.With correct estimation of the polarity,the reliability of seismic inte rpretation results can be improved.For the static correction of low-velocity l ayer,and with complicated topography and fairly big thickness of low-velocity layer,using vertical depth to estimate the amount of static correction will ap pear a certain of errors that are not allowed,and the normal depth of dip plane should be con-sidered for it.In low signal-to-noise ratio and low dip angle (or complex folded zone),velocity information like retrograde phenomenon shou ld be paid more attention to.For retrograde point of seismic velocity tends to be breaking point of fault in velocity spectrum of corresponding seismic profi le,hence,systematic processing of these breaking points could obtain real faul t localization.
出处
《新疆石油地质》
CAS
CSCD
2003年第4期306-307,315,共3页
Xinjiang Petroleum Geology
关键词
地震资料
地震剖面
断层
地震波
seismic profile
polarity
static correction
seismic velocity
fault
