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Shale Reservoir Drainage Visualized for a Wolfcamp Well (Midland Basin, West Texas, USA)

机译:页岩水库排水可视化沃尔夫望水剧(Midland盆地,西德克萨斯州,美国)

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摘要

Closed-form solution-methods were applied to visualize the flow near hydraulic fractures at high resolution. The results reveal that most fluid moves into the tips of the fractures. Stranded oil may occur between the fractures in stagnant flow zones (dead zones), which remain outside the drainage reach of the hydraulic main fractures, over the economic life of the typical well (30–40 years). Highly conductive micro-cracks would further improve recovery factors. The visualization of flow near hypothetical micro-cracks normal to the main fractures in a Wolfcamp well shows such micro-cracks support the recovery of hydrocarbons from deeper in the matrix, but still leave matrix portions un-drained with the concurrent fracture spacing of 60 ft (~18 m). Our study also suggests that the traditional way of studying reservoir depletion by mainly looking at pressure plots should, for hydraulically fractured shale reservoirs, be complemented with high resolution plots of the drainage pattern based on time integration of the velocity field.
机译:施加闭合溶液 - 方法以在高分辨率下可视化液压骨折附近的流动。结果表明,大多数流体进入裂缝的尖端。在停滞流动区(死区)中的骨折之间可能发生链子,这在液压主要骨折的排水范围之外,在典型良好井(30-40岁)的经济寿命之外。高导电的微裂纹将进一步改善恢复因素。沃尔夫桩中正常的假假设微裂纹的流动的可视化显示出这样的微裂纹支持烃的回收,从基质中的更深,但仍然将矩阵部分留出60英尺的并发断裂间距。 (〜18米)。我们的研究还表明,通过主要看压力图来研究储层耗尽的传统方式,用于液压破碎的页岩储层,基于速度场的时间集成,与液压骨折的页岩储层进行互补的排水模式。

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