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C&C Reservoirs recently presented at the UK’s Oil and Gas Authority EOR Workshop in Aberdeen. The presentation described how C&C Reservoirs’ new EOR knowledge base and analytics tools are of value to governments and E&P companies seeking to maximise economic oil recovery from their assets.
In 2014 a UK Government Report (The Wood Review) outlined how the UK should Maximise Economic Oil Recovery (MERUK). Within the important role played by EOR was highlighted and this led to the creation of a UK Pilot EOR Workgroup. The purpose of this workgroup was to identify EOR application opportunities through a screening of all UK oil fields. The Pilot EOR work identified a significant potential for EOR application.
Subsequently in 2016 the UK’s Oil and Gas Authority developed an EOR Strategy and Delivery Programme to progress opportunities. The Aim of the OGA’s EOR Strategy and EOR Delivery Programme was to:
In addition, the UK’s OGA Asset Stewardship Expectations encourage the assessment of EOR. In consultation with the industry, the OGA has developed stewardship expectations across the oil and gas lifecycle, for operators and licensees. Companies must understand the recovery technical limit and current predicted recovery, and then evaluate and select future recovery options (new wells, improved oil recovery, enhanced oil recovery) to maximise economic recovery. They must also identify the associated technology and/or production strategies required to maximise economic recovery.
C&C Reservoirs can support governments and E&P companies to maximise economic oil recovery from their reservoirs through the new EOR studies.
The aim of the DAKS R&D project is to create an EOR knowledge base based on the proven application of EOR processes. The focus will be on all deployed EOR processes at field, reservoir, pilot or well level. Reports will focus on projects that have proven to be effective “Evidence of Success”. Each report will document the impact of the EOR processes on production performance to identify the best EOR processes for each reservoir type.
One of the key EOR technologies seen as important for the UKCS was Polymer EOR and through 2017 several major oil companies (BP, Chevron, Shell and Equinor) worked with the OGA to develop a document to support companies who are appraising Polymer EOR in the UK. UK data estimated recovery factor for the 10 UKCS offshore polymer projects ranged from 1% to 11%. Studies conducted in the USA display a larger range and upside in incremental recovery factors. This can be attributed to UKCS offshore operating environment, wider well spacing, increased polymer supply costs all play a role in impacting the potential polymer EOR prize.
C&C Reservoir studies have identified several global analogs for Offshore Polymer EOR projects. One example is the Chinese Suizhong 36-1 offshore polymer flood. Lessons learned from these Polymer Projects can increase confidence in UKCS Polymer EOR applications. A summary of the EOR report is given below together with a snapshot of the report information that can be obtained from C&C Reservoirs as an example of the report information being compiled.