可控震源高效采集技术在利比亚的应用

Application of high-efficient vigroseis acquisition technique in Libya.

本文根据利比亚的实际应用情况,从激发方式、接收方式及其他配套技术对可控震源的高效采集技术进行了简要阐述。在激发方式方面,本文主要介绍了交替扫描技术,并从理论上计算了两组交替扫描单次记带、两组交替扫描叠加记带、三组或多组交替扫描等的效率。在接收方式方面,本文引入炮道比概念,并认为需要打破三维束线概念,引入BLOCK的概念,定义一个合理的生产超级排列片,让记录排列片在其中移动。在对利比亚一个项目的实际数据分析的基础上,最终选择配备8200道,采用40条检波线纵向滚动采集施工,得到了预期效果。在相关配套技术方面,提出了非整道距灵活偏移的思路,开发了BIN信息反推炮点偏移技术,以及用于SPS处理、QC分析及控制的软件。

Based on the practical application scenario in Libya, the paper briefly introduced high-efficient vibroseis acquisition technique from aspects of shooting-receiving way and other necessary techniques. In an aspect of shooting way, the paper mainly introduced alternative sweeping technique, and computed the efficiency of two fleets of alternative sweeping and tapping individually theoretically, two fleets of alternative sweeping and tapping by stack, three or multiple fleets of alternative sweeping. In an aspect of receiving, the paper introduced the conception of shot-to-receiver ratio and considered that it should break the conception of 3D swash and introduce the conception of BLOCK, defining a reasonable productive supper-spread patch, allowing the record spread patch to move within. On the basis of data analysis in a practical project applied in Libya, we finally chose the acquisition operation of arrangement with 8200 channels and 40 receive line for in-line roll, achieving predictive effect. In an aspect of necessary techniques, we presented the ideas of non-integer group interval and flexible offset, developed shot-point offset technique back-deduced by BIN information and relevant software used for SPS processing, QC analysis and control.