Research Institute of Petroleum Industry

Proposal of suitable chemicals to improve injection waters regarding performance, compatibility and matrix diffusion in Yadavaran Field



 Petroleum engineering &  Development Company (PEDEC)



Water injection is performed to maintain the reservoir pressure or to get rid of excess water production via disposal. Ideally, injection water should be free from particles and oil films and compatible with the formation water to prevent any scale formation within porous media and any subsequent formation damages and impaired injectivity. The activity focuses on the factors causing formation damage and impaired injectivity as well as optimizing the injection conditions in a way that injection water can easily penetrate the reservoir rock then maximizing the injection volume.



  • Understanding the scaling factors to select the best choice fro their prevention
  • Water analysis and laboratory investigations to characterize the reservoir fluids
  • Characterizing the type and extent of water suspended solids which can cause permeability damages
  • Characterizing the interfering ions, determination of scaling probability as well as  prevention methods for reducing the scaling extent in order to maximize the injection rates then maintaining the reservoir pressure increase
  • Environmentally friendly disposal of the produced water

Objectives and achievements

  • Determination of the concentration of the suspended solids of Sarvak, Fahliyan and Karoon Water, as well as, their particle size distribution
  • Laboratory investigation on corrosion potential of injection and formation waters to propose anti-corrosion chemicals to reduce corrosion
  • Microbial investigation, microbe cultivation and isolation within injection and formation waters to select a proper biocides
  • Determination of oil emulsion content of the injection water and its impact on permeability
  • Laboratory investigation of injection and formation water compatibility under surface and reservoir conditions to determine the optimum mixing ratio
  • Investigation of the effect of thermodynamic condition changes on scaling
  • Determination of the extent of formation and injection water compatibility
  • Determination of formation damage due to clay swelling and its subsequent permeability reduction
  • Laboratory investigation on the impact of suspended solids on the permeability reduction in core flooding


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