西非深海地区Kirchhoff 偏移技术的研究与应用

Study and application of Kirchhoff pre-stack time migration technology in
deepwater Block A of west Africa

朱武

Zhu Wu

中石化国际石油勘探开发公司，北京 100102

(International PetroleumExploration and Development Company, SINOPEC, Beijing 100102, China).

拥有极为丰富石油资源的西非深海A 区块，由于受下伏岩盐运动的影响，形成了该区非常复杂的断块构造，偏移成像难度较大。针对这一问题，进行了深入细致的研究，实践表明，应用Kirchhoff叠前时间偏移技术重新处理重点工区地震采集资料，不仅大幅提高了地震资料的成像精度，而且断层边界清晰，中深目的层成像效果良好，层位划分清晰。

Deepwater Block A is one of the most prospecting areas in the world. However, the seismic migration imaging for this area is
poor due to the structural complexity which is influenced by salt movement. In order to solve the problem, Kirchhoff pre-stack time
migration is applied to improve imaging and velocity analysis. This technique not only improves the imaging precision, but also
makes the fault boundary clear, the imaging of middle and deep target zone nice and the identification of horizon clear and reliable.