首页> 中文期刊> 《陕西科技大学学报(自然科学版)》 >存在部分连通断层的条带状油藏试井解释新模型

存在部分连通断层的条带状油藏试井解释新模型

         

摘要

条带状油藏是断块油田中最常见的构造形态之一,国内外学者对非封闭断层的研究大都集中于均质油藏和复合油藏.因此,用现有的试井解释模型对具有存在非封闭断层的条带状油藏试井资料进行解释所得到的结果往往并不理想.通过引入界面表皮的概念,将部分连通断层视为一个无限薄的表皮边界,建立了条带状油藏中存在部分连通断层的试井解释新模型,并利用Fourier指数变换和Laplace变换等方法进行求解,绘制了井底压力响应特征曲线.分析表明:界面表皮越大,曲线上翘越多,当它足够大时,表现为封闭断层的特征;边界距离对典型曲线形态的影响显著;流度比、厚度比、导压系数比主要影响压力导数曲线上升和下降.%Banded reservoir is one of the most common structures in fault block reservoir, most of the researches on non-closed faults are concentrated in homogeneous reservoirs and composite reservoirs.When we used the existing well testing interpretation models to inter-pret the actual banded reservoir well test data with partially communicating fault boundary, the obtained results are not always ideal.A well testing model for wells located near a par-tially communicating fault in a two-zone,banded reservoir was established by introduced the"boundary skin"concept,the solution was obtained with the Fourier and Laplace transforma-tion.Type curves were plotted by the Stehfest numerical inversion method and this model was verified by the examples.The result showed that the bigger the boundary skin value,the more the curve upturned;the boundary distance has a significant effect on the typical curve shape;the mobility ratio,thickness ratio,pressure conductivity coefficient mainly affected the pressure derivative curve rise and fall..

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