The main role of infill drilling is either adding incremental reserves to the already existing one by intersecting newly undrained (virgin) regions or accelerating the production from currently depleted areas. Accelerating reserves from increasing drainage in tight formations can be beneficial considering the time value of money and the cost of additional wells. However, the maximum benefit can be realized when infill wells produce mostly incremental recoveries (recoveries from virgin formations). Therefore, the prediction of incremental and accelerated recovery is crucial in field development planning as it helps in the optimization of infill wells with the assurance of long-term economic sustainability of the project. Several approaches are presented in literatures to determine incremental and acceleration recovery and areas for infill drilling. However, the majority of these methods require huge and expensive data; and very time-consuming simulation studies. In this study, two qualitative techniques are proposed for the estimation of incremental and accelerated recovery based upon readily available production data. In the first technique, acceleration and incremental recovery, and thus infill drilling, are predicted from the trend of the cumulative production (Gp) versus square root time function. This approach is more applicable for tight formations considering the long period of transient linear flow. The second technique is based on multi-well Blasingame type curves analysis. This technique appears to best be applied when the production of parent wells reaches the boundary dominated flow (BDF) region before the production start of the successive infill wells. These techniques are important in field development planning as the flow regimes in tight formations change gradually from transient flow (early times) to BDF (late times) as the production continues. Despite different approaches/methods, the field case studies demonstrate that the accurate framework for strategic well planning including prediction of optimum well location is very critical, especially for the realization of the commercial benefit (i.e., increasing and accelerating of reserve or assets) from infilled drilling campaign. Also, the proposed framework and findings of this study provide new insight into infilled drilling campaigns including the importance of better evaluation of infill drilling performance in tight formations, which eventually assist on informed decisions process regarding future development plans.

加密钻井的主要作用是通过与新的不排水（原始）区域相交来增加现有储量，或者加快目前枯竭区域的生产。考虑到资金的时间价值和额外井的成本，通过增加致密地层的排水来加速储量可能是有益的。然而，当加密井主要产生增量采收率（原始地层的采收率）时，可以实现最大收益。因此，增量和加速采收率的预测在油田开发规划中至关重要，因为它有助于优化加密井并确保项目的长期经济可持续性。文献中提出了几种方法来确定增量和加速采收率以及加密钻井区域。然而，这些方法中的大多数都需要庞大而昂贵的数据；和非常耗时的模拟研究。在这项研究中，提出了两种定性技术，用于根据现成的生产数据估算增量和加速采收率。在第一种技术中，根据累积产量 (Gp) 与平方根时间函数的趋势来预测加速和增量采收，从而预测加密钻井。这种方法更适用于考虑到长期瞬态线性流动的致密地层。第二种技术基于多井 Blasingame 类型曲线分析。当母井的生产在连续的加密井开始生产之前达到边界主导流 (BDF) 区域时，这种技术似乎最好地应用。这些技术在油田开发规划中很重要，因为随着生产的继续，致密地层中的流态逐渐从瞬态流（早期）变为 BDF（晚期）。尽管方法/方法不同，但现场案例研究表明，包括最佳井位预测在内的战略井规划的准确框架非常关键，特别是对于实现商业利益（即增加和加速储量或资产）从填充钻井运动。此外，本研究提出的框架和结果提供了对加密钻井活动的新见解，包括更好地评估致密地层加密钻井性能的重要性，最终有助于有关未来开发计划的明智决策过程。