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复杂海陆过渡带地震采集难点与对策

周 滨1 龚旭东2 张建峰1   

  1. 1 中海石油(中国)有限公司天津分公司;2 中海油能源发展股份有限公司工程技术分公司
  • 出版日期:2014-10-15 发布日期:2014-10-15
  • 作者简介:周滨(1975-),男,河南新乡人,1994 年毕业于江汉石油学院,高级工程师,主要从事地震资料采集和处理工作。地址: 天津市滨海新区渤海石油路688 号海洋石油大厦A 座1101,邮政编码:300452。E-mail:zhoubin@cnooc.com.cn

Bottlenecks and Solutions of Seismic Data Acquisition in Complex Marine-Continental Transitional Zone

Zhou Bin1, Gong Xudong2, Zhang Jianfeng1   

  1. 1 CNOOC (China) Tianjin Company; 2 CNOOC EnerTech-Drilling & Production Co.
  • Online:2014-10-15 Published:2014-10-15

摘要: 海陆过渡带地震资料采集面临的不仅仅是水深的变化,还要面临海底海流、海浪、外界施工环境等复 杂因素的影响。渤海A 区块过渡带海底电缆地震采集作业采用8L4S176T 观测系统,针对野外采集作业中施工效率低、 陆检资料品质差、检波点点位精度难控制和浪区施工环境恶劣等难点,提出了沿检波线放炮、合理规划以减少大搬排 列次数、放缆定位一体化、提前多铺设两根电缆、分时放炮、增加电缆配重、“三低一高”法作业等相应措施,成功 完成了该区块复杂过渡带的地震资料采集,取得了高品质的地震资料。

Abstract: Seismic data acquisition of marine-continental transitional zone faces both changes in water depth and the impact of some complex factors, such as sea bottom current, sea wave and outside working environment. 8L4S176T geometry is adopted for OBC seismic acquisition operation in the transitional zone of Block A on Bohai Sea. In the light of low efficiency, poor quality of geophone data, difficult to control precision of detector position and the harsh operational environment of the wave zone, a series of measures are proposed, such as shooting along the detector line, reducing the number of moving all detector-lines one time, laying and positioning the detector at the same time, laying two more cables in advance, shooting at an appropriate time, increasing the cable weight and some other appropriate methods. As a result, seismic data acquisition for the complex transitional zone in this block is successfully completed, with high-quality seismic data made available.