Study On High Efficiency Collecting Technology Of Controllable Seismic Source

Seismic survey is one kind of exploration methods, which could get layer interface, lithology and structure information through analyzing the spreading time, amplitude and waveform of reflection wave which is from artificial source and recording by special instrument. It has been more than100years since the first seismic exoploration project, but there are only two kinds of sources in seismic:the pulse source and long time sweep source. The long time sweep exploration is came to reality in1950s’. The usage of vibrator is more and more popular along with its devolepment. Especially in recent decade years, the vibseis technology has been devoleped a lot. Some kinds of high-production acquisition are invented and increase the production rate rapidly. On the other hand, the new high-production acquisition improves the quality of data. More important, it brings us a new idea in seismic exploration. Now, we are focus on finial section not raw record.In this article, the vibseis theory is described. Therefore, we know how the long time sweep source can replace the pulse soucre. It explains why it takes so long time to finish one record in vibseis. To improve the production rate, this paper make research on6kinds of high-prodcution sweep technology such as flip-flop sweep, slip sweep, HPVA sweep, V1sweep, DSSS and ISS. The main part of this article is the research of choosing sweep parameter. It introduces how to choosing the sweep type, start frequency, sample rate, start and end taper, sweep length, end frequency and the compensation of sweep amplitude in nulinear sweep. This article aslo describes how the harmonious noise interfere the data and how to attenuate haromious noise in acquisition and processing. It also brings some new idea on seismic geometry design which has big difference with nomal pulse source exploration. In high-production acquisition, we need increase the density of source point and fold to improve the quality of data. The quality requirement of raw single record is lower. Finally, in this article, it demonstrates how high-production sweep lower the cost and improve the data quality by one project exsample.The vibration spreads so many countries because of the advantage, high afficiency and low cost. It is useful for us to research of Vibration technology to hold the development of exploration. But we should know that we are behind the world wide vibseis technology and we should make more effort to come up with them.