GEOCOR-Ⅳ 1024道的2D数据采集

2-D DATA ACQUISITION BY GEOCOR-IV

本文详细讨论了GEOCOR-Ⅳ1024道2D采集监视记录上影响波区分配的三个因素:表层纵波速度V_p、观测系统X、△x和记录长度T之间的关系,推导出选取合理观测系统的计算公式:远偏移距:X=6/5·T·V_p道间距:文中介绍了千道仪器所特有的满迭加次数和超迭加次数的滚入、滚出覆盖观测系统。还简单介绍了它在江苏和新疆两地的试验结果。

In this paper, three factors affecting the wave separation on paper records of 2-D data acquisition with GEOCO R-IV were studied in detail. The three factors are: near surface compres sional wave velocity V_p; the layout X; and the relation between △x and T (recording length). Formulas for selecting the proper layout were derived:Large offsets: 5/6·T·V_pGroup interval:single-shot spread two-way-shot(symmetry-shot.) non-svmmetry-shotchannel numbers of the long side of the spread-1The roll-in/roll-out folded layouts of full-stack and super-stack were introduced in this paper. The systems are specified for the over 1000 channel system such as the GEOCOR-IV etc. Also, test results obtained from Jiangsu and Xinjiang Provinces were presented.