鄂尔多斯盆地西南部巨厚黄土塬区非纵地震资料处理技术

发布时间：2018-05-15 03:24

本文选题：巨厚黄土塬 + 非纵地震资料　；参考：《煤田地质与勘探》2017年01期

【摘要】：鄂尔多斯盆地西南部地表为巨厚黄土塬区,地表结构复杂,低降速带厚度变化快,沟中弯线受地形条件限制,测线成网困难,直测线采集资料信噪比和分辫率都较低,难以满足目前岩性勘探的需求。针对这种情况,在经过理论论证和生产试验后,研发了一套针对黄土塬地区的非纵地震勘探技术,这种技术兼顾吸收了黄土塬沟中弯线、黄土塬多线及三维地震勘探技术的优点,不仅避开了黄土塬近炮点强能量干扰,而且还展宽了叠加道集方位角。针对非纵地震资料特点,在保真保幅处理理念指导下,通过非纵资料处理技术攻关,提出了针对非纵资料的三维静校正技术、创新性应用三维噪声压制模块压制非纵测线相干噪声、改进了基于VSP测井合成记录的井控处理理念,形成了一套巨厚黄土塬区低信噪比非纵地震资料处理技术序列。
[Abstract]:In the southwest of Ordos Basin, the surface structure is complex, the thickness of the low velocity zone changes rapidly, the curve line in the gully is restricted by the terrain condition, the surveying line is difficult to form a network, the SNR and the braided ratio of the data collected by the straight line are low. It is difficult to meet the current demand for lithologic exploration. In view of this situation, after theoretical argumentation and production test, a set of non-longitudinal seismic exploration technology is developed for the loess plateau area, which absorbs the mid-bend line in the loess plateau gully. The advantages of multi-line and 3D seismic exploration technology in loess plateau not only avoid the strong energy interference near the firing point in loess plateau but also widen the azimuth angle of superimposed trace collection. According to the characteristics of non-longitudinal seismic data, under the guidance of the concept of fidelity and amplitude preservation, through the non-longitudinal data processing technology, a three-dimensional static correction technology for non-longitudinal data is put forward. Using 3D noise suppression module to suppress coherent noise of non-longitudinal logging line, the concept of well control processing based on VSP logging synthetic record is improved, and a set of non-longitudinal seismic data processing technology sequence with low signal-to-noise ratio (SNR) in extremely thick loess plateau is formed.
【作者单位】：中国石油东方地球物理公司研究院长庆分院;
【基金】：中油股份公司物探技术攻关项目(2013-03-02)~~
【分类号】：P631.44

【参考文献】