Wednesday، 17 January 2024
 

Drilling Projects

According to the Master Development Plan (MDP) for the Azar Oil Field, 19 production wells and one water disposal well to a depth of 4700 meters in the Sarvak/Asmari formation have been drilled. The existing well (AZR-02) has been put into operation as a production well. The drilling of this well was carried out by a domestic company under an Engineering, Procurement, and Drilling Services (EPDS) contract. The Azar Oil Field is one of the most complex and challenging drilling operations in the region, requiring precise engineering and operational calculations. Challenges in designing the casing are influenced by differences in formation pressures, necessitating the use of heavy drilling fluids (83-148 Pcf) in alternating low and high-pressure zones, heavy casing formations (roughly equal to the capacity of the rig), long open-hole intervals, high H2S content, and unexploded mines left over from previous conflicts in the region (Iran-Iraq War), making them the most difficult challenges in the Azar Field. High-volume acidizing, also known as blended acidizing, is a technique where acid is injected into the pressurized formation to dissolve formation layers and increase reservoir-well connectivity. Sarvak Azar, aiming to enhance the effective productivity index of wells, has undertaken blended and selective acidizing with high volumes in the wells of the Azar Oil Field. In the blended acidizing operations of the Azar Oil Field, chemical diverters such as VDA (Viscoelastic Diverting Acid) are used to guide the acid to low-permeability zones. However, in selective acidizing operations, retrievable or inflatable plugs that can isolate specific sections of the formation are employed. The results of high-volume acid stimulation demonstrate increased well productivity index and overall field production in the Azar Oil Field.

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  • Drilling Projects
  • Drilling Projects
  • Drilling Projects
  • Drilling Projects
  • Drilling Projects
  • Drilling Projects
  • Drilling Projects
  • Drilling Projects