大庆油田西部地区地下水动态监测网优化设计

Optimal design of groundwater monitoring network in west Daqing oil field

大庆油田地下水动态监测网 (用水文地质定性方法建立 )历经 3 0多年的开采 ,需要进行定量优化设计。本次研究采用卡尔曼滤波技术与地下水流系统确定 -随机性数值模型相耦合的方法 ,首先对现有监测网进行质量评价 ,计算结果表明 :监测网在漏斗区 (地下水集中开采区 )应增加监测孔的数目 ,调整监测孔的位置。为此 ,我们拟订了 6套 12个备选方案 ,从中选取了由 88个监测孔组成的监测网 。

The groundwater regime observation network of Daqing,qualitatively estabilished by way of Hydro geologic approach,required a quantitative optimal design after having been operated for over thirty years.By means of combining kalman filter algorithm and deterministic stochastic numerical model of the groundwater flow system,the reserch estimates the quality of the existing groundwater regime observation network.The calculation vesults indicate that the numbers of observation wells should be increased in the cone region of groundwater level deproession and the positions of the observation wells should be adjusted.For this purpose,we design six different sets of plans(twelve individual ones)and select among them one plan in which the observation network is made up of eighty eight observation wells.This plan is optimal not only economically but also for fulfilling the observation objectives.