川西北深层地震勘探采集关键技术及应用效果

Key Technologies and Application Effects of Deep Seismic Exploration and Acquisition in Northwest Sichuan

摘要: 川西北地区位于川北古中坳陷低缓构造区，纵向上发育多套含油气层位，是深层–超深层海相勘探有利区。为提高川西北地区深层资料信噪比和分辨率，查清深层地腹地质构造位置和形态，促进勘探工作的顺利进行，通过应用深层地震勘探三维观测系统关键参数优选技术、激发参数优选技术和山地地震野外资料质量自动评价技术，大力推进了采集技术进步与施工作业能力升级，推动了四川盆地新区、新领域的天然气勘探历程。

Abstract: Northwest Sichuan is located in the low structural area of Paleo-middle depression of North Sichuan, and there are many sets of oil-bearing and gas-bearing horizons in the vertical direction, which is a favorable area for deep and ultra-deep Marine facies exploration. In order to improve the signal-to-noise ratio and resolution of the deep data in northwest Sichuan, clarify the position and morphology of the deep core tectonic structure, and promote the smooth progress of the exploration work, the design technology of wide azimuth, long arrangement, high-density 3D geometries, and the optimized excitation technology based on lithology recognition and Classification of altitude for explosive design, as well as the automatic evaluation technology for mountain seismic field data quality, have vigorously promoted the progress of acquisition technology and the upgrading of construction capabilities, and promoted the natural gas exploration process in new areas and new fields of the Sichuan Basin.