【摘要】 中国东部成熟油田区现有三维地震资料难以满足局部复杂目标精细勘探需求。为了提高针对富油凹陷局部复杂勘探目标的地震资料品质,充分发挥物探技术在油气勘探开发中的作用,本文提出2.5次三维地震勘探技术,综合考虑了在该类地区实施全方位高密度地震勘探所需设备及施工效率和费用等难题。该技术是在以往三维勘探的基础上,针对难以落实的潜在有利目标区,采取"拼接方位角、增大横纵比、加密采样点、互补炮检距"等四条技术措施进行目标采集和多期次地震数据融合处理,达到全方位高密度均匀采样的目的。在冀中探区推广应用该套技术,取得了令人满意的效果。更多还原

【Abstract】 Although oil fields in East China are usually considered as mature oil zones with quite dense ex-ploration,existing 3Dseismic data can hardly meet the requirements for complex target exploration.In order to improve the data quality for complex target exploration in oil-rich depressions,we propose in this paper a 2.5times3Dseismic survey approach.Based on previous 3Ddata,a 3Dsurvey with target-oriented geometry design is put forward.Here target-oriented meanswide azimuth jointed,aspect ratio enlarged,sampling points infill,and source-receiver reciprocity"to realize full azimuth,high density,and even sampling acquisition,and multiphase seismic data integration processing.This approach solves equipment lack,difficult operation,and high cost with full azimuth and high density seismic acquisition in East China.At present,the proposed approach has been widely applied in Central Hebei,and has provided oil companies with high quality seismic data for their exploration and productions.更多还原