摘要
为更真实地反映裂缝性油气藏在钻井、完井和开采过程中的污染情况及地层本身的非均质性 ,建立了不等厚横向非均质双重介质复合油气藏试井分析有效井径的数学模型。该模型综合考虑了双重介质的特性和流体性质及地层厚度的变化 ,考虑了表皮效应、井筒储存效应等影响 ,采用隐式有限差分法求解数学模型 ,制作了新的典型曲线 ,分析了井筒储存系数、窜流系数和弹性储容比等参数对压力导数曲线产生的影响。该模型数值计算方法简便 ,结果稳定。一般等厚的双重介质复合油藏模型和单个有界区域的双重介质复合油藏模型是该模型的特例 。
For more truely representing the damage conditions and heterogeneity of the formation itself in course of drilling,completion and production of fissured reservoir, a mathematical model to well testing analysis of effective amatheatical model to well tisting analysis of effective wellbore radius for a composite reservoir with non-uniformthickness and double media is created. This model generally takes into account the characteristics of doublemedia,fluid properties and variation of formation thickness as well as the effect of skin factor,wellbore storageeffect etc. The implicit finite difference approach is used to find out solution of the mathematical model,new typecurves are created, the effect of wellbore storage coefficient interporosity flow coefficient, storativity ratio andother parameters on the generation of derivative curves is also analyzed. The numerical calculation method of themodel is simple,the calculation result is stable. The composite reservoir model with uniform thickness and doublemedia and individual bounded double medium composite reservoir model are considered as special cases of themodel,therefore the scope of application of the model will be more extensive.
出处
《油气井测试》
1999年第1期1-5,9-75,共7页
Well Testing
关键词
双重介质
非均质油气藏
数学模型
典型曲线
dual media,heterogeneous reservoir, mathematical model, typical curve
