Optimum Drilling Bit Selection in Sarvak and Asmari Formations Using Multiple Criteria Decision-Making Approaches

Appropriate drill bit selection can lead to enhance remarkable drilling operation efficiency and cost-saving. There are several factors affecting the bit selection process. Among these parameters, some factors such as specific energy (SE), cost per foot (CPF), formation drillability (FD), and rate of penetration (ROP) are considered the most important ones. One of the best approaches to select the optimum drill bit is to apply Multiple Criteria Decision-Making (MCDM) techniques. In this research work, Fuzzy Technique for Order-Preference by similarity to Ideal Solution (FTOPSIS) is used to choose the optimum bit for drilling operations in Sarvak and Asmari formations due to higher accuracy and validity of findings achieved from the FTOPSIS. With this respect, three types of bits (i.e. 517, 527, and 537) were considered as available candidates and were then ranked through the FTOPSIS, resulting in the best option (bit). In Asmari formation, similarity factors for bit types of 517, 527, and 537 bits were obtained as 0.479, 0.438, and 0.382, respectively indicating bit type 517 can be chosen as a proper option compared to other ones. Similarly, in Sarvak formation, results showed 0.5405, 0.5019, and 0.5622 values for 517, 527, and 537 bit types respectively, demonstrating the bit-type 537 is the most appropriate alternative in such formation.