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首页> 外文期刊>The Journal of Canadian Petroleum Technology >Effect of Naturally Fractured Aquifers on Oil Recovery From Stress-Sensitive Naturally Fractured Reservoirs
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Effect of Naturally Fractured Aquifers on Oil Recovery From Stress-Sensitive Naturally Fractured Reservoirs

机译：天然裂缝性含水层对应力敏感天然裂缝性油藏采油的影响

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摘要

The material balance (MB) equation for stress-sensitive un-dersaturated and saturated naturally fractured reservoirs (nfr's) has been written taking into account the presence of an unsteady-state naturally fractured aquifer (nfa). The nfa can be of limited or infinite size. The solution is presented in finite difference form to achieve a quick convergence of the iteration process. Historically, non-fractured aquifers have been attached to material balance calculations of naturally fractured reservoirs. This is not realistic from a geologic point of view as it implies that fractures are present in the oil portion of the reservoir, but disappear the moment the water oil contact is reached. It is shown that the use of an unfractured aquifer in a naturally fractured reservoir can lead to erroneous oil recovery estimates. The effect of water influx on the material balance equation is illustrated with an example.
机译：考虑到存在非稳态自然裂缝含水层（nfa），编写了应力敏感的不饱和和饱和自然裂缝储层（nfr）的材料平衡（MB）方程。 nfa的大小可以有限或无限。该解决方案以有限差分形式表示，以实现迭代过程的快速收敛。从历史上看，非裂缝性含水层已被附加到天然裂缝性储层的物质平衡计算中。从地质学的观点来看这是不现实的，因为这意味着在储层的油部分中存在裂缝，但是在与水油接触时消失。结果表明，在自然裂缝的储层中使用未破裂的含水层会导致错误的采油率估算。举例说明了水流入对物料平衡方程的影响。

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