The effect of the pressure variation due to water flooding and oil extraction on the water table of confined aquifer 油田注水和采油的压力变化对承压水位的影响
Based on an analysis of characteristics of 4th aquifer and its rapid drawdown in Xuzhou to Huaibei area, lowering water table of 4th aquifer have caused compaction in lower Cenozoic overburden, and lead to ground surface subsidence in this region. 本文依据对徐州、淮北地区第四含水层的特征和四含水位急剧下降情况的分析,指出四含水位下降造成该区新生代下部覆盖层的压实,因而导致地面沉降。
Based on the observation and analysis, it is considered that the fracturing causes are land subsidence resulted from the dropdown of water table in Quaternary aquifer. 通过观察分析,认为变形破裂乃第四系水位下降引起的地面沉降所致,并据此提出了防治对策。
The calculation result effectively indicate the change rule with the time and space of water table of the aquifer, soft dank aquifer, parameter in process of wells work in the pit. 计算成果较好地刻画了基坑井群的实施过程中含水层、弱透水层水头、参数的时空变化规律。
The water table of the unconfined aquifer is greater than the hydraulic head of the confined aquifer for all the cases considered, leading to downward groundwater flow through the aquitard. 潜水含水层的水位总是大于承压含水层的水头,使得通过弱透水层的地下水流方向向下。