1. Presentation by Oluwadamini Ajayi School : University of Minnesota – Twin Cities Course : Mechanical Engineering (BME) Year : 400 Level Company : Shell Nigeria Exploration and Production Company (SNEPCO) Position : Mechanical Engineering Intern Duration of Stay : 1.5 months (6 weeks)

2. Learning Objectives Expand my learning horizon and skill set Learn and develop Engineering specific skills that help further the oil an gas industry as a whole Gain background knowledge about Oil and Gas industry To obtain in depth understanding of Oil and gas extraction processes

3. General Overview of Oil and Gas extraction In the oil industry, there are a myriad of disciplines involved in the extraction and production of oil and gas. I have however been able to streamline all these many disciplines into 3 major groups namely: Subsea Process Engineering Mechanical Statics

4. Subsea Engineering Subsea Engineering is the foundational work for the extraction of oil and gas in offshore facilities. SNEPCO focuses on Deep Water Regions (+500m) In DW regions, an FPSO is used. Production, water and gas lift riser lines as well as umbilicals are connected to the FPSO for the different stages of extraction.

5. Subsea Engineering (Contd.) Using the Bonga SW subsea layout schematic (attached), we can see the different Production Drilling and Water Drilling Centers. In the PDCs, there are manifolds which gather the oil extracted from each of the producing wells and flow it to the FPSO. In the majority of the PDCs, there are manifolds with a pigging loop. The WDCs are used for water injection. The purpose of water injection is to increase the pressure in the reservoirs and lift up the oil for more efficient extraction. This happens when the pressure in the reservoir is low ( due to a probable in the production capacity of the drilled wells). There are also manifolds in the WDCs which perform similar functions to those in the PDCs The Umbilicals are the most important aspect as they are responsible for the transition of signals and controls through which the entire system functions Attached is a Bonga Southwest/Aparo Subsea Full field and Layout Schematic

8. Process Engineering Overview of Oil and Gas Processes Types of equipment, valves, their symbols and uses Understanding and Developing PDFs (see attached) Understanding and Developing P&IDs Process Controls

9. Well 1Well 2Well 3Well 4 Top Manifold Test Separator LP Separator A LP Separator B Oil/Oil Heat exchangers Bulk Oil heat exchanger Treater Degassing Separator Bulk Oil Treater Oil degassing tank Pump Cooler STORAGE Manifold Flowline VRU 1 st stage VRU 2 nd stage LP Gas filter separators A&B FGC A FGC B FGC C Glycol reboiler heat exchanger Glycol contactor Glycol/Gas exchanger Riser gas heat exchanger Still column condenser Glycol-glycol exchanger (Cold) Glycol condensate separator Glycol filter Activated Carbon Adsorber Glycol surge tank Glycol pumps Glycol reboiler Glycol-glycol exchanger (Hot) Sparge gas column Produced water tank Produced water pumps Produced water hydrocyclone Induced gas floatation separator PROCESS FLOW DIAGRAM SCHEMATIC (PFD)

10. Mechanical Static The Mechanical Static team deals with equipment that are mostly stationary These equipment range from pressure vessels to pumps and tankers The designing and specification of the static equipment used in the process are done by the mechanical static team Based on the information from the conceptual stage, they modify (as necessary) and help select the best possible equipment to be used for the job needed to be done

11. Note: Commuting, alcohol in social settings and smoking in office environments are out of scope Slide 11 Life-Saving Rules – what are they? Work with a valid work permit when required Conduct gas tests when required Verify isolation before work begins and use the specified life protecting equipment Obtain authorisation before entering a confined space Obtain authorisation before overriding or disabling safety critical equipment Protect yourself against a fall when working at height Do not walk under a suspended load Do not smoke outside designated smoking areas No alcohol or drugs while working or driving Wear your seat belt While driving, do not use your phone and do not exceed speed limits Follow prescribed Journey Management Plan 1 7 2 8 35 11 6 12910 4

12. Health, Safety and Environment (HSE) The HSE Policy: Shell sets targets for improvement and also measures, appraises and reports performance Shell also requires contractors to adhere to the HSE requirements Shell makes sure that joint ventures under its operational control also apply the policy Shell includes HSE performance in the appraisal of staff and rewards accordingly

13. Final Remarks It’s been a wonderful stay here My understanding of the oil and gas industry has been widely broadened and I was able to achieve all of my learning objectives during my stay here I look forward to working in the Oil and gas industry in the very near future