CO 2 EOR Operational Considerations Case Study

Transcription

1 Taking on the World s Toughest Energy Challenges. TM CO 2 EOR Operational Considerations Case Study James D. Rose Business Development Manager, Asia Pacific 1

2 Introduction China has fields that should benefit from gas injection. Gas injection is a key element of US EOR success and provides significant operational experience in gas injection. Leveraging past experience, while employing leadingedge technology and innovation, will maximize recovery and reduce cost. 2

3 EXXONMOBIL EOR EXPERIENCE ExxonMobil has involvement with a significant portion of industry s gas injection projects, one-third of the additional oil production. Significant portion in US. Prudhoe Bay: HC Gas Injection Battrum and Fosterton : Insitu Combustion Loudon: Surfactant Flood Pembina: Polymer Flood 17 Canadian Fields: HC Gas Injection Judy Creek, Wizard Lake, Penbina Nisku, Rainbow River, Hibernia Snorre, Statfjord:, Grane HC Gas Injection Ruhlermoor, Georgsdorf: Steamflood Tengiz: Sour Gas Injection Cold Lake: Cyclic Steam Stimulation Iron River and Celtic: Single-Well SAGD 5 California Projects: Steamfloods and Insitu Combustion 19 West US Projects: CO2 Injection Means, Salt Creek, Aneth, Slaughter, Wasson, among others W. Yellow Creek: Polymer Flood Hawkins: Gas Injection Jay: N2 Injection South Pass 89: HC Gas Injection Abu Dhabi: Gas Injection (under evaluation) Malaysia: Gas Injection (under evaluation) Gas Injection (Miscible, Immiscible) Chemical Processes Thermal Processes Polymer Flooding 3

4 ExxonMobil Permian Basis Example: Means Field Miscible CO 2 pattern flood Miscible / WAG Means, USA Streamline Analysis EOR Displaceable Oil (Sorw - Sorm) PV Lithology Dolomite Perm 20 md ( ) Well spacing 10-acre/20-acre Thickness 300 ft Improved recovery over waterflood by 15% through infill drilling, waterflood improvements and CO2 miscible flooding 4

5 Integrated Reservoir Management a Key to Success Fundamental Studies at Rock-Pore Level EOR Geologic Modeling Laboratory Studies Surveillance and Flood Management Reservoir / Process Simulations Field Pilots Enhanced recovery at Means has grown significantly beyond initial expectations due to efficient CO2 utilization, extended field life, and improved sweep efficiency (focused reservoir management). 5

6 Other Operational Considerations Dehydration System Glycol dehydration of CO2 more difficult than natural gas Requires higher heat loads for regeneration Higher foaming tendencies can potentially lower dehydration capability Compressor Cylinder Lubrication System CO2 scavenges lubricants from cylinder walls Separate force fed system using high viscosity oil Corrosion Mitigation Upgrades Tanks have Vapor Recovery Units to maintain gas blanket pressures Wellhead & Tree: Injectors 316 stainless steel Injection Tubing - Duoline 20 Filament-wound Glass-Reinforced Epoxy liner Low cost alternative to CRA Rod pump rods - Spray metal with plastic coating Duoline 20 6

7 Controlled Freeze Zone TM Technology Labarge pilot testing Controlled Freeze Zone TM Technology Operational Advantage: Separation of high pressure gas without reducing pressure (recompression for injection not required) Figure 2, Controlled Freeze ZoneTM Technology for Developing Sour Gas Reserves, as presented in Abu Dhabi at May 2009 GasTech Conference. 7

8 Conclusions China can increase resources significantly if it can fully exploit oil recovery potential from gas injection When CO 2 injected, carbon capture also a result Maximum recovery, at reduced cost, possible by leveraging industry experience while employing leadingedge technology and innovation ExxonMobil has significant world-wide experience that can help China in efforts to achieve its gas injection potential whether miscible or immiscible. 8

9 Addendum 9

10 Biography - James D. Rose Currently Business Development Manager, Asia Pacific, ExxonMobil Upstream Ventures (East) Limited Diversity of global upstream experience with ExxonMobil since 1981 Exploration, Development and Production Engineering, Operations, Commercial, Business Development Asia-Pacific, Nigeria, North Sea, Venezuela, USA Experience related to topic: Participated in reservoir studies of inert gas and polymer injection. Successfully pilot tested CO2 injection (immiscible) Estimated additional recovery and developed business case for world-scale gas Injection project (miscible, 4 fields) Managed 2 BCFD gas injection program (miscible, 20 fields) Education: BS Engineering - Texas A&M University, 1981 MBA - Webster University London,