Scott is located about 187 kilometres northeast of Aberdeen in 142 metres of water. The Scott Field reservoir exhibits elements of both stratigraphical and structural trapping. The field structure, effectively a large southward tilted fault block, is compartmentalised into a series of four main pressure isolated fault blocks by mid to late Jurassic faulting. Current modelling is aimed at targeting bypassed oil to increase ultimate recovery.
CNOOC Petroleum Europe Limited, a wholly-owned subsidiary of CNOOC Limited, is the operating partner of Scott (41.89%), with Dana Petroleum E&P Limited (20.64%), Edison E&P UK Ltd. (10.47%), NEO Energy Production UK Limited (5.16%) and MOL Operations UK Limited (21.84%).
* Incremental revenue over pilot cost
The application of the OOR pilot process for the Scott field consisted of the following steps:
Step 1 - Field Screening of Reservoir Characteristics and Well Specific Data - Completed
Step 2 -Target Well Sampling & Laboratory Analysis - Completed
Step 3 - Single Well Pilot Test (In-Situ Microbial Response Analysis - ISMRA®) - Completed July 2020
The In-Situ Microbial Response Analysis (ISMRA®) or Pilot Test is designed specifically to replicate the laboratory results in the reservoir. Produced water samples were taken pre OOR nutrient injection and just after Well flow back. A significant production response is often observed; however, the most important aspect to this step is the microbial response observed in the laboratory from samples taken upon return to production.
Step 4 - Targeted Water Flood Implementation
Progression to step 4 – Targeted water flood implementation – will be confirmed once the microbiology and the production impact has been assessed
Step 5 - Full Field Implementation
"For us, it was a basic pumping operation. Very similar to a scale squeeze, although smaller volumes and therefore slightly more straightforward."
- Nigel Wallace, Altus Intervention