Application of high-efficient vigroseis acquisition technique in Libya
Wang Chang-hui1,3, Zhou Heng2, Zhang Mu-gang1, Zhou Da-tong2, Luo Fei1, Wang Jing-fu2
1. BGP International, Zhuozhou City, Hebei Province, 072751, China;
2. Department of Acquisition Technique Support,BGP,Zhuozhou City, Hebei Province, 072751, China
Abstract：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.
