Loading...

Evaluation the Effect of Emulsifier Type and Concentration on Emulsion Stability in Synthetic based Muds

Moradi Liavoli, Mohammad Ali | 2020

442 Viewed
  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 53676 (06)
  4. University: Sharif University of Technology
  5. Department: Chemical and Petroleum Engineering
  6. Advisor(s): Taghikhani, Vahid
  7. Abstract:
  8. Synthetic based fluid has been introduced since 1990 as an alternative to conventional oil-based fluid, which, like oil-based mud, is effective wherever the use of water-based mud is problematic. This type of fluid with similar performance to oil-based mud is environmentally acceptable and the safety of working with this fluid is higher for drilling rig personnel. cutting drilled with synthetic base fluid can be discharged into ocean and sea waters, and this can reduce the total cost of drilling compared to oil-based mud because there isn't need to transport the cutting to offshore and dispose of them and consequently drilling is reduced. In terms of safety, these fluids reduce the risk of fire due to having a higher flash point than diesel, and it is easier to detect gas kicks with these fluids.In this study, 8 synthetic fluids were evaluated as continuous phases of drilling mud, which were olefins and esters. To select the appropriate base fluid, the compatibility of these fluids with conventional emulsifiers was investigated by screen method. The results, together with the results of rheology and electrical stability tests, showed that the olefin base fluid was in better condition.Increasing the concentration of conventional emulsifier in synthetic based mud, from 4% to 6% increased the stability of olefin-based mud while also reducing HPHT filtration but had little effect on rheological properties.By changing the type of emulsifier to 10 types of synthetic emulsifiers, only the fluid with SBM EMUL IV emulsifier had better and higher electrical stability and less HPHT filtration than the sample of olefin-based fluids with other synthetic emulsifiers and its rheological properties were better than other samples.These two fluid samples (olefin base fluid with conventional emulsifier and SBM EMUL IV) were also evaluated at 300 °F, but no optimal results were observed
  9. Keywords:
  10. Emulsifier ; Synthetic Based Fluid ; Emulsion Stability ; Olefin Based Mud (OBM) ; Synthetic Based Mud (SBM)

 Digital Object List

 Bookmark