Our People

 John Walsh2

Dr. John Walsh

John worked for Shell for 21 years in various regions of world. He has extensive on-site troubleshooting experience, in locations shown below. He was the Shell Global Water Treating Subject Matter Expert.

He has experience with all aspects of water treating in E&P including produced water, water flood, sulfate reducing membranes, RO, polymer flood, steam flood, acid flow back, hydraulic fracturing flow back, and coal seam methane associated water. He regularly teaches the SPE course on water treating.

Specializes in:

  • troubleshooting and debottlenecking
  • system design based on modelling
  • system design based on analogues
  • cost estimating and reduction


John has worked in these regions of the world

Countries worked At