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一、简况井间干扰测试又叫做“水文勘探”,它是通过研究两口井间的压力干扰来研究井间的地层参数的一种方法。具体地说,就是在被选定的井组中,一口定为“激动井”,在实验中改变它的工作制度,例如关井、开井等,造成井底附近地层压力的变化。这种变化在弹性地层逐渐向周围传播,而在邻近的“观察井”中,下入微差压力计,连续记录传播过来的干扰压力。通过对这种干扰压力的分析和计算,可以判断两口井间的地层情况。
I. INTRODUCTION The interwell interference test, also called “hydrological exploration,” is a method of studying formation parameters between wells by studying the pressure disturbance between two wells. Specifically, one of the selected well groups was identified as an “excited well,” and changed its working system during the experiment, for example, closing wells and opening wells, resulting in changes in formation pressure near the bottom of the well. This change gradually spreads around the elastic formation, and in the nearby “observation wells” into the differential pressure gauge, continuous recording of the interference of the interference pressure. Through the analysis and calculation of such interference pressure, we can judge the formation condition between the two wells.