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Quantification of Recovery Factors in Downspaced Wells: Application to the Eagle Ford Shale

机译：储层井中恢复因素的量化：鹰福特页岩的应用

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In this paper, we present the results of an elaborate simulation study from the Eagle Ford shale by integrating rate transient analysis (RTA), microseimic interpretation and rock typing to quantify the well recovery factors. First,we builda fine-scale geocellular model to represent the lithology of Eagle Ford Shale (EFS)in interest. A fully compositional fluid model wasthen integrated into the geocellular model. The stimulated rock volume (SRV) is based on microseimic data interpretation. The permeability of the system is calibrated from rate transient analysis (RTA) using the methodology suggested by (Suliman et al. 2013). Historical production data of a 500'conventional spacing 3-well PAD is then matched and the sensitivity to well spacing is then carried out using the history-matched model in two configurations. These are same layer completions and staggered well completions. Recovery factors are then quantified with the help of expected ultimate recovery (EUR) calculated from simulation forecasts and original gas in place (OGIP) calculated with the help of volumetric calculation. Our results show that the conventional 500'spacing is not optimal in the rich condensate area of the Eagle Ford shale. Additionally, there were little to no difference in the predicted EUR's in staggered or same layer completions. Microseismic data suggests that the fracture grows up to the top of EFS and is not limited to the lower EFS. We also perform sensitivity studies with respect to drawdown that show minimal or no condensate banking with choke management. Early-time condensate banking is however very sensitive to higher drawdown pressures.
机译：在本文中，我们通过集成速率瞬态分析（RTA），微观解释和岩石打字来量化鹰福特页岩的精心仿真研究结果，以量化良好的恢复因素。首先，我们构建精细的地理细胞模型，代表Eagle Ford页岩（EFS）的逻辑。完全成分流体模型是集成到地理蜂窝模型中的。刺激的岩石体积（SRV）基于微观数据解释。使用（Suliman等人2013）的方法，从速率瞬态分析（RTA）校准系统的渗透率。然后将500位间隔3孔垫的历史生产数据匹配，然后在两种配置中使用历史匹配的模型进行对井间距的敏感性。这些都是相同的层完事权和交错完井。借助于从仿真预测和在体积计算的帮助下计算的预期恢复（EUR）计算恢复因子，从仿真预测和原始气体计算（OGIP）计算的预期恢复（EUR）。我们的研究结果表明，常规500'spacing在鹰福特页岩的浓缩凝块面积中不适。此外，预测欧元的交错或相同图层完整几乎没有差异。微震数据表明，骨折增长到EF的顶部，不限于下部的EFS。我们还对卷取管理显示最小或没有冷凝水库的绘图进行敏感性研究。然而，早期冷凝水银行对更高的缩减压力非常敏感。

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