存在有限导流断层的条带状油藏试井新模型

目前对断层封闭性的试井研究主要集中于封闭断层，用现有的试井解释模型对具有非封闭断层尤其是有限导流断层边界的油气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，建立了条带状油藏中存在有限导流断层的试井解释新模型，模型不仅考虑了流体通过断层面，还考虑了断层内部流体的流动，并利用Fourier余弦变换和Laplace变换等数学物理方法求得了井底压力表达式。绘制了模型的井底压力响应特征曲线，曲线共有7个流动阶段。分析表明，无因次导流能力F_CD值越大，曲线下凹程度越大；界面表皮S值越大，曲线上翘程度越大，当S值足够大时，表现为封闭断层的特征；无因次导压系数η_fD主要影响压力导数曲线下降的多少；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。

Well-testing Interpretation Model for Strip Reservoirs with Finite Diversion Faults

At present, well fault seal analysis tests are mainly focused on closed faults. When using the existing well test interpretation model to explain oil and gas well-test data with non-closed faults, especially with a finite diversion fault boundary, the results are not ideal. By introducing the concept of interfacial skin, a new model of well-test interpretation with a finite diversion fault in stripe reservoirs was established. The model considers not only the fluid passing through the fault plane, but also the flow of fluid in the fault. The Fourier cosine transform, Laplace transform, and other mathematical physics methods were used to obtain the bottom hole pressure equation. The bottom hole stress response curves of the model were plotted, and there were seven flow stages. The results show that the larger the F_CD value, the more concave the curve. The larger the S value, the more convex the curve; when the S value is sufficiently large, characteristics of a closed fault are demonstrated. η_fD mainly affects the amount of decrease in the pressure derivative curve. The fluidity ratio, thickness ratio, and pressure derivative coefficient ratio mainly affect the increase and decrease in the pressure derivative curve.