Oil, Gas & Chemicals

Due Diligence & Technical Services

E3’s professionals have been providing technical and business advisory services to the oil, gas, and chemicals (OGC) industry for an average of 30 years.  Our team members have experience with upstream, midstream, and downstream OGC projects. Our advisory services are highly valued within all project phases including development, design, financing, engineering, construction, performance testing, and acquisition or divestiture. We have worked on a wide array of projects, including the following:

  • Natural Gas Gathering, Pipelines, Storage and Compression Facilities
  • Crude Oil and Product Pipelines
  • Natural Gas Liquids (NGL) Recovery, Fractionation, Storage and Transportation
  • Liquefied Natural Gas (LNG) Liquefaction, Storage and Transport
  • Hydrogen
  • Carbon Dioxide Capture, Enhanced Oil Recovery and Sequestration
  • Ammonia
  • Methanol
  • Chemicals
  • Biodegradable Polymers
  • Biodiesel and Renewable Fuels
  • Synthesis Gas Production including Gasification and Reforming
  • Oil Refining
  • Transmix Processing and Hydrotreating
  • Oilfield Saltwater Gathering and Disposal
  • Sour Gas Treating and Sulfur Recovery
  • Recovered Carbon Black
  • Gas to Liquids
Technology Lead, Al Rettenmaier

Representative Projects


Petra Nova Carbon Capture Project, Texas

E3 served as the Independent Engineer for the Petra Nova Carbon Capture Project. In that role, E3 provided a lender with a due diligence review of a carbon capture system CO2 compressor, 80-mile CO2 pipeline, and complete redevelopment of wells and surface facilities in the West Ranch Field to support new multiple reservoir CO2 injection and production patterns to implement CO2 enhanced oil recovery (EOR) operations. CO2 will be permanently sequestered as individual reservoirs are abandoned following commercial oil recovery operations.


Oxy Elk Hills NGL Recovery Facility, California

E3 provided pre-acquisition review of gas processing facility. E3 performed due diligence on the acquisition of a 300 MMSCFD gas processing facility, including amine treating, oxygen removal, membrane separation, NGL recovery (including ethane) and fractionation for Development Capital Resources (DCR). In addition, a 500 MW combined cycle cogeneration plant was part of the acquisition, which is discussed separately. E3’s scope of review for the gas processing facility included reviews of the process design, NGL recovery performance, current mode of operation, CO2 management, integration of steam with the cogeneration plant, O&M history, O&M costs, condition of the facility, and more.


American Midstream, Louisiana and Mississippi

E3 served as the Independent Engineer for the replacement of the existing 370 mile, 22” Midla pipeline in Louisiana and Mississippi with a new 52-mile, 12” high pressure pipeline. The project also included the transfer of assets to a new operating company pursuant to the FERC Settlement Agreement. The project scope included new pipelines, existing pipelines, compression, inerts reduction, nitrogen rejection, and dehydration. E3 also performed construction monitoring for the Midla pipeline project.


Williams Marcellus and Utica Midstream Assets, Pennsylvania

E3 provided due diligence for an investment of $1.45 Billion by CPPIB into the OVM and UEO oil & gas gathering, processing and fractionation assets in the Utica and Marcellus regions. The overall asset value was over $4 billion.


NGL Water Solutions, Texas

E3 performed due diligence on the Permian Basin assets of this NGL Energy Partners subsidiary, which is the leading saltwater disposal company in the United States. In this role, E3 evaluated the saltwater disposal systems, treatment, wells, pipelines, operations, financials and all other aspects of the business for a private equity investor.


Wolf Infrastructure, Alberta

E3 provided due diligence for the acquisition of the Access Pipeline, which consists of a dual pipeline, pumping, and measurement facilities used for transportation of diluent and bitumen blend between heavy oil extraction facilities in Northern Alberta and terminals in Edmonton, Alberta. Also included in the scope were the diluent-bitumen blending facilities in Northern Alberta.