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本文提出一种代表天然裂缝油藏中井筒内流动的解,建立这个解的模型暇定裂缝和岩块之间的相互作用处于不稳态,井筒贮集和表皮在确定模型的边界条件中予以考虑。提出了一套新的分析天然裂缝油藏动态压力数据的典型曲线,其每簇曲线对应一个不同的 C_De~(2S)值,每一典型曲线代表一个经向流动解,过渡流动期特性近似的组成一个曲线簇。一簇内的每一条曲线对应一个不同的(?)′λ′e~(-2s)乘积,这里的(?)′和λ′分别依赖于裂缝/岩块储藏能力比/和渗透率比。当把数据同时与无量纲压力曲线和微分无量纲压力曲线匹配时消除了多值性,油藏参数包括渗透率、表皮、无量纲井筒贮集、ω′和λ′可以从这种匹配计算。用这些新的典型曲线代替已有的典型曲线对真实的天然裂缝油藏动态压力数据获得了更可信的匹配。讨论了使用这些曲线的主要优点,第一个优点是:当只测得了足够的过渡期数据,而要做霍纳分析又不能用时,可用此法分析,将用真实的压力恢复数据来说明这点;第二个优点,在回顾了许多真实井的测试情况后,发现渗透率比的实际上限值被扩展了,现在对λ′<10~(-3)的值可以计算了。详细解释了这些曲线的应用,这些曲线的可用性用成功地与动态压力数据相匹配来演示。
In this paper, we present a solution that represents the wellbore flow in a natural fractured reservoir. The model for this solution is that the interaction between the fractures and the rock mass is in an unstable state. Wellbore storage and the skin are given in the boundary conditions of the model consider. A new set of typical curves for analyzing dynamic pressure data of natural fractured reservoirs is proposed. Each curve corresponds to a different C_De ~ (2S) value. Each typical curve represents a meridional flow solution, and the transitional flow characteristics are approximate Form a curve cluster. Each curve in a cluster corresponds to a different product of (λ) e ~ (-2s), where? And λ ’depend on the fracture / rock storage capacity ratio and the permeability ratio, respectively. Multivariate is eliminated when the data is matched to both the dimensionless pressure curve and the differential dimensionless pressure curve. Reservoir parameters include permeability, epidermis, dimensionless wellbore storage, and ω ’and λ’ can be calculated from this match. Substituting these new canonical curves for existing canonical curves yields a more plausible match to the real natural fractured reservoir dynamic pressure data. The main advantages of using these curves are discussed. The first advantage is that when only enough transitional data has been measured and the Horner analysis can not be used, this method can be used to analyze this data with real stress recovery data The second advantage, after reviewing many of the real-world tests, is that the practical limit of permeability ratio is found to have been extended. Now the value of λ ’<10 ~ (-3) can be calculated. The application of these curves is explained in detail. The availability of these curves is demonstrated by successfully matching the dynamic pressure data.