基于地球物理目标参数的三维观测系统优化设计

The optimization of 3-D observation system based on geophysical objective parameters.

1. 西南石油学院，四川成都610500;2. 中国石油化工股份有限公司胜利油田物探公司，山东东营257100

Southwest Petroleum Institute,Chengdu 610500,China

对于陆上三维地震采集的线束状观测系统优化设计,记录仪器的有效利用道数、观测系统总的覆盖次数、排列片的最大炮检距是最为重要的地球物理目标参数。针对这3个目标参数所论证的期望值的偏差最小化,提出了一套三维观测系统优化设计方法,即利用有约束的数学规划求解优化的目标函数,实现三维观测系统参数的最优化设计。应用该设计方法对胜利探区4个实际区块的观测系统参数进行了优化设计和对比分析,结果表明,在窄方位角采集、纵横向覆盖次数均匀分布等方面该方法的效果较好。

The most important geophysical parameters are effec- tive trace numbers of survey system,total fold coverage of geometry and maximum offset of patch to structure charac- ter of the swath geometry on 3-D seismic survey design. An optimizing design is put forward to 3-D geometry based on minimizing deviations from the user-specified geophysi- cal target values.The optimizing objective function is solved by mathematical programming techniques so that the parameters of 3-D geometry are optimized.The method is illustrated with four examples of 3-D survey design in the explore area of Shengli oilfield.Through contrast and anal- ysis of two sets of designed parameters,the result shows that optimizing method can obtain more satisfying effect in the hand of narrow azimuth seismic survey and equilibrium distribution of inline and crossline coverage.