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- crosshole seismic survey 井间地震
- This earthquake measured 7 according to the seismic survey. 经测定，这次地震的烈度为七级。
- Abstract The evolutionary programming inversion(EPI)of crosshole seismic travel time tomography is a nonlinear and global optimization method. 提要 井间地震走时层析成像的遗传进化反演法是一种全局最优化的非线性反演方法。
- The technique of crosshole seismic tomography, with its high resolution, can be used to detect the underground fine structures and goals. 地震层析成像技术,以其分辩率高的特点,而主要用于地下精细构造和目标的探测。
- Wang Shoudong, Wu Lu,Crosshole Seismic Data Image Using Wave Equation Inversion, Presented at 66th SEG Annual Meeting, 1996. 王守东，刘家琦，层状介质二维波动方程叠前反演方法，中国地球物理学会年刊，长沙，1993。
- The evolutionary programming inversion(EPI)of crosshole seismic travel time tomography is a nonlinear and global optimization method. 井间地震走时层析成像的遗传进化反演法是一种全局最优化的非线性反演方法。
- When crosshole seismic data in depth domain were interpreted geologically, synthetic seismogram used to identify seismic horizons must be in depth domain. 摘要在对深度域的井间地震资料进行地质解释时，用于层位标定的合成记录必须是深度域的。
- Crosshole seismic tomography in complex media is a very complicated nonlinear inverse problem.It is difficult to obtain a satisfactory and clear image by using linearized tomographic method. 摘要复杂介质井间地震层析成像是一个很复杂的非线性反演问题，常规的线性反演方法无法得到好的解。
- Firstly, the locations of shot holes have to be chosen properly in the seismic survey area. 首先，在进行地震法测量的地区正确地选定爆破井的位置。
- Velocity is the most important parameter in seismic survey, and VSP is a direct and valid way in acquiring it. 地震波速度是地震勘探中最重要的一个参数,而VSP测量是一种比较直接且行之有效的获取地震波速度的方法。
- In the paper, we have introduced the acquisition and processing method of threecomponent seismic survey. 着重介绍了三分量地震勘探的采集原理和处理方法。
- Main task of threecomponent seismic survey is to test gas distribution in Songliao Baisin, and predict lithologic reservoir. 松辽盆地北部三分量地震勘探的主要任务是检测天然气的分布范围，预测岩性油气藏。
- Seismic surveying is largely concerned with the primary P waves. 地震勘探主要研究一次纵波。
- The results fromcomparison show that these anomalies spread over a DZ nose delineated by seismic survey,which has been confirmed to be a gas-bearing structure by drilling. 对比结果表明：这些异常分布在地震勘探圈定出的DZ鼻状隆起上，后者被钻探结果证实为含天然气的构造，有力地说明放射性方法探测天然气藏的有效性。
- For the complicated surface environment of neritic zone, seismic survey in this area exists its unique problems because of two entirely different operation methods. 摘要滩浅海地区地表条件复杂，陆地和海上施工方法不同，采集的资料存在着较大的差异，影响了最终成果。
- It implies that the reflection seismic survey is a available strategy investigating the structure in the Sulu ultra-high pressure metamorphosed terrace. 它意味着在非沉积层的结晶岩区,反射地震勘测手段是研究地下复杂结构的有效方法。
- The great difficulties in threecomponent seismic survey are depressing random noise in acquisition, removing the artificial vertical faults in shear wave section. 三分量地震勘探的最大难点是采集上压制随机干扰，处理上去除转换波剖面上同相轴的人为的直立错断（由于通常处理软件不佳引起）。
- Shallow\|layer seismic survey using controlled vibrator is greatly disturbed by environment noise, so high resolution is needed in seismic data pretreatment. 可控震源浅层地震勘探受环境噪声干扰很大,对其接收信号进行预处理时要求分辨率很高。
- Magnetic and gravity surveys were often run as a preliminary to seismic survey in earlier time. 磁力和应力勘探常常作为地震勘探的前奏在早些时候进行。
- The cross-well seismic survey has no disturbance from low velocity belt,with high S/N and high sampling rate.A single sandbody,rhythmic layer and interbed can be differentiated with it. 井间地震无低速带干扰,具有高信噪比、高采样率等特点,能够识别单砂体、韵律层和层内夹层,在沉积微相划分、微构造研究、低序级断层识别、储层精细描述等方面具有明显的优势。
