从实验室到现场预测各向异性应力下的出砂量

E. Papamichos, L. E. Walle, A. Berntsen, D. Szewczyk
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引用次数: 1

摘要

出砂和出砂率预测对于油气生产优化、提高采收率、降低成本和环境足迹非常重要。最近在真三轴试验系统中对Castlegate砂岩进行出砂试验的实验室结果表明,应力各向异性不仅在出砂过程中起重要作用,而且在出砂速率中也起着重要作用。结果证实了我们的假设,即应力各向异性意味着出砂早,出砂少。实验结果还揭示了流体饱和度(即油、盐水或不可还原水饱和度)对起砂率和出砂率的影响。它们可以校准SandPredictor(一种现场出砂预测模型),用于水侵前后的应力各向异性和产量。现场实例分析证明了这种影响,并表明了地应力各向异性和含水率对砂体质量和速率的重要性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Sand Mass Production in Anisotropic Stresses From Lab to Field Predictions
Sand onset and sand rate predictions are important in hydrocarbon production to optimize production, increase recovery, and reduce costs and the environmental footprint. Recent laboratory results on Castlegate sandstone from sand production tests in a True Triaxial test system have revealed that stress anisotropy plays an important role not only on sand onset but also in sand rate. The results confirmed our hypothesis that stress anisotropy means earlier sand produced but less sand. The laboratory results also revealed the effect of fluid saturation, i.e., oil, brine or irreducible water saturation on sand onset and sand rate. They allow the calibration of SandPredictor, a field sand prediction model, for stress anisotropy and production before and after water breakthrough. A field case analysis demonstrated the effects and showed the importance of in situ stress anisotropy and watercut on sand mass and rate.
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