从大天池构造主体的钻探实例谈地震资料处理解释

DISCUSSING SEISMIC DATA PROCESSING AND INTERPRETATION ON THE BASIS OF DRILLING RESULTS OF THE MAIN PART OF DATIANCHI STRUCTURE

四川盆地川东高陡复杂构造的油气勘探经历了数十年的探索与实践,取得了长足的进步,发现了不少气田,其中地震资料起到至关重要的作用。但是,高陡复杂构造的地震勘探技术至今仍然面临严峻的考验,其原因一方面在于面对的地质问题越来越复杂,另一方面人们对高陡构造引起地震资料的畸变以及各种解释陷阱仍然认识不足,特别是解释技术人员由于经验较少,往往用解释一般构造的思维去对待高陡复杂构造,其结果自然会产生错误的结果,从而造成决策失误。文章从大天池构造带主体的钻探实例入手,分析地震资料存在的一些问题,借以引起人们的关注。

Through probing and practising for several tens of years, the oil and gas exploration of East Sichuan high-steep complicated structures in Sichuan Basin has made considerable progress and many gas fields have been found out, in which the seismic data have played an important role. However, the seismic exploration technology of the high-steep complicated structures has still faced a severe test up to now. The reasons include that the geologicial problems faced become more and more complicated on the one hand, and the knowledge of the seismic wave distortion and various seismic interpretation pitfalls caused by the high-steep structures is still not enough on the other hand. Especially for lack of experiences, the ideas of interpreting conventional structures were applied to the high-steep complicated structures by the technical personnel, thus leading to wrong conclusion and mistaken policy decision. In the paper, some problems existing in seismic data are analyzed on the basis of drilling results of the main part of Datianchi structure so as to bring about people's attention.