某油气田污染物的地下运移数值模拟

本文对美国某地一口油气开采井泄漏事故中的污染物在地下运移的过程进行了数值模拟。结果显示在考虑地下水与泄漏污染物的密度效应时,污染物渗透到地下后会污染当地的整个含水层,其滞留时间长达一年之久,对区域生态环境会产生负面影响;在忽略地下水与污染物的密度效应时,污染物主要滞留在地下浅部地区,主要对泄漏区附近的地表生态环境造成污染。因此,泄漏的污染物对当地或区域的生态环境具有长期的负面影响,油气资源的开采需在充分考虑水文地质条件的基础上进行污染防治和环境修复。

Subsurface transport of contaminants spilled from an oil-gas exploration well

In this paper, numerical simulations were conducted to investigate the subsurface transport of contaminates spilled out from an oil-gas exploration well in USA. The result shows that the contaminants leaked from surface pad would pollute entire aquifer and will be detained for more than one year when considering the density-effects of fluids. Such pollute can effect the regional ecological and environmental conditions. If excluded the density-effects from the fluids, numerical simulation shows that the fluids would contaminate the shallow part of subsurface area. One can conclude that the spilled fluids have potential perils for the shallow ecological environments. In conclusion, negative effects by extraction oil pollute to local or regional environments can be continued for a long time. The hydrological and geological conditions should be considered during pollution control and environmental restoration.