鄂尔多斯盆地黄土塬区陇东-镇北地区非纵地震采集方法研究

发布时间：2018-10-15 19:22

【摘要】：如今鄂尔多斯盆地中生界石油勘探重点已转移至盆地南部的黄土塬区,该区的地震地表条件比较复杂,干扰波相当发育,高频吸收衰减非常严重,导致地震资料的信噪比和分辨率均较低,沿用常规地震采集方法难以发挥作用。本文在对目前黄土塬区现有采集方法现状研究后,通过理论论证和生产试验后逐步发展了一套黄土塬区的非纵地震采集技术。它的叠加道集方位角宽,且能避开近道干扰,避开黄土次生干扰,压噪效果好,有效的提高了勘探的精度。本文研究的主要内容包括：①非纵观测系统可行性论证；②非纵道距、偏移距、非纵距等参数精细设计；③非纵黄土塬区的静校正技术；④合理的叠前噪音压制技术；⑤组合的反褶积技术。通过本课题研究形成了一套适用于黄土塬区的采集方法和处理流程,为获取高信噪比、高分辨率地震资料奠定了技术基础。通过本文研究,在相同投资下,应用非纵技术的勘探面积是常规二维勘探方式的3倍以上,在一定的处理手段下,又可获得三维数据体,对于油田发展和资料处理都意义非凡。
[Abstract]:The Mesozoic petroleum exploration in the Ordos Basin has now shifted to the loess plateau in the southern part of the basin. The seismic surface conditions in this area are quite complex, the interference waves are quite developed, and the high frequency absorption attenuation is very serious. As a result, the signal-to-noise ratio (SNR) and resolution of seismic data are low, so it is difficult to use conventional seismic acquisition method. After studying the present situation of the current acquisition methods in the Loess Plateau, a set of non-longitudinal seismic acquisition techniques has been developed through theoretical demonstration and production test in this paper. The superposition gathers have wide azimuth angle and can avoid the near track interference and the loess secondary interference. The noise reduction effect is good and the precision of exploration is improved effectively. The main contents of this paper are as follows: (1) feasibility demonstration of non-general survey system; (2) fine design of parameters such as non-longitudinal channel distance, offset distance and non-longitudinal distance; (3) static correction technology in non-longitudinal loess plateau; (4) reasonable pre-stack noise suppression technology; 5. Combinatorial deconvolution technique. Through this research, a set of acquisition methods and processing flow are formed, which can be used to obtain high signal-to-noise ratio (SNR) and high resolution seismic data. Through the research in this paper, under the same investment, the exploration area of applying non-longitudinal technique is more than three times of that of the conventional two-dimensional exploration mode. Under certain processing means, the three-dimensional data volume can be obtained, which is of great significance for oilfield development and data processing.
【学位授予单位】：西安石油大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P631.4

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