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油气藏上方的激发极化效应以及油气层本身的高阻电磁效应,都能导致瞬变电场的存在。这是应用瞬变电场直接寻找油气藏的基础。理论研究表明,在油气藏的上方,供电极距不太大和大时间的瞬变电场是有明显异常反映的。
The induced polarization effect above the reservoir and the high resistance electromagnetic effect of the hydrocarbon layer itself can cause the transient electric field to exist. This is the application of transient electric field directly to find the basis of the reservoir. Theoretical studies show that there is a clear abnormal reflection of the transient electric field at the top of the reservoir due to the small electrode gap and large time.