The first phase of any hydraulic fracturing (HF) operation is to select carefully the best layers and wells based on a specific set of criteria. Selecting HF candidates plays a pivotal role in achieving the desired objective such that any attempt to execute this treatment fails without performing comprehensive studies in this regard. In this paper, data from 3 wells in a fractured carbonate reservoir in one of the biggest oilfields of Iran are studied for selecting the best HF candidate. Of these wells, which are comprised of 45 evaluated layers, the best candidate wells/layers are selected from a geomechanical point of view. Initially, a new fracability index appropriate for carbonate reservoirs, namely total fracability index (TFI), is defined. This index integrates mechanical properties and horizontal stresses into an equation. In the next step, four main criteria, namely layer thickness, TFI, natural fractures state (including orientation and density), and fracture confinement, are employed to choose the candidate layers in the wells. Lastly, having used these criteria and analytic hierarchy process, candidate intervals are selected and a hydraulic fracturing simulation model (P3D) is used for evaluation.

任何水力压裂（HF）操作的第一阶段都是根据一组特定的标准仔细选择最佳的层和井。选择HF候选者在实现预期目标中起着关键作用，因此，如果不对此进行全面研究，则执行该治疗的任何尝试都将失败。本文研究了伊朗最大油田之一的裂缝性碳酸盐岩储层中3口井的数据，以选择最佳的HF候选物。在这些由45个评估层组成的井中，从地质力学的角度选择了最佳候选井/层。最初，定义了适用于碳酸盐岩储层的新的脆性指数，即总脆性指数（TFI）。该指数将机械性能和水平应力整合为一个方程式。在下一步中 四个主要标准，即层厚，TFI，天然裂缝状态（包括方向和密度）和裂缝限制条件，被用来选择井中的候选层。最后，在使用了这些标准和层次分析法之后，选择了候选区间，并使用了水力压裂模拟模型（P3D）进行了评估。