This work presents results on both pressure and productionrnresponses during transient and boundary-dominated flowrnperiods, in naturally fractured reservoirs with vuggy porosity.rnIt is considered that triple-porosity systems may not be treatedrnas dual-porosity reservoirs, mainly because fractures and vugsrnhave different geological origin and therefore their interactionrnwith matrix blocks do not have to be similar. New solutionsrnare presented for the case where there is no primary flowrnthrough vugs, an extension of the Warren and Root model,rnexisting an interaction between matrix, vugs, and fracturernsystems.rnThe new model assumes a single partially penetrating wellrnproducing from an undersaturated system considering severalrnboundary conditions. The inner boundary condition at thernwellbore can be considered either a fixed flux or constantrnpressure boundary. The upper, lower, and outer boundariesrncan be modeled at constant pressure or prescribed flux. Thesernboundaries can be closed, or the influx can be modeled via arnstep rate or a ramp rate function. The step rate function couldrnrepresent a waterflood effect and the ramp rate function arnnatural waterdrive or gas drive cap effect. The transientrnpressure response is also analyzed by considering an infiniternouter boundary. In transient well tests and decline curvernanalysis, the effects of triple-porosity for different upperrnand lower boundaries conditions are analyzed, besidesrnconsidering closed upper and lower boundaries as it has beenrndone in the literature. It is shown that for triple porosityrnsystems the derivative function may exhibit different behavior to that of double-porosity reservoirs. It is demonstrated thatrnthe presence of vugs and caves may have a definitiverninfluence on transient well test and decline curve behaviors.rnSynthetic and field examples are presented to illustrate thernmethodology proposed in this work.
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机译：这项工作提出了在具有多孔孔隙的天然裂缝性油藏的瞬变和边界支配流动期的压力和生产响应的研究结果。人们认为，三孔系统可能不是双孔油藏，这主要是因为裂缝和孔洞具有不同的地质成因。因此它们与矩阵块的交互作用不必相似。针对没有初级穿洞的情况，Warren and Root模型的扩展，存在矩阵，穿洞和裂缝系统之间的相互作用的情况，提出了新的解决方案。新模型假设考虑到几个边界条件，从欠饱和系统中产生单个渗透的部分井。井筒的内部边界条件可以视为固定通量边界或恒定压力边界。上边界，下边界和外边界可以在恒定压力或指定通量下建模。这些边界可以被封闭，或者可以通过误步率或斜率函数对流入量进行建模。阶跃率函数可以表示注水效果，而阶跃率函数可以表示自然水驱或气驱顶效应。还通过考虑无限大的计算机边界来分析瞬态压力响应。在瞬态油井测试和下降曲线分析中，除了考虑文献中已经提到的封闭的上下边界外，还分析了三孔对不同上下边界条件的影响。结果表明，对于三重孔隙度系统，微分函数可能表现出与双孔隙度储层不同的行为。结果表明，孔洞和溶洞的存在可能对瞬态试井和下降曲线行为有决定性的影响。合成和现场实例说明了本文提出的方法。
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