Lecture
Revival of mature onshore oil field in U.S.
- Evaluation work-flow of CO2 EOR
2018 Volume 83 Issue 6 Pages 450-454
Details
2018 Volume 83 Issue 6 Pages 450-454
During planning stage of CO2 EOR （enhanced oil recovery）, evaluation of remaining oil volume is one of the most important works because of its significant impact on field performance and project economics. However, the evaluation becomes very challenging when the concerned field is a legacy field where historical data are insufficient unless reliable data were later supplemented. We describe how to evaluate CO2 EOR project for a legacy field with insufficient historical data.
To estimate the remaining oil volume in the field, the following multi-scale data were integrated.
1. SCAL （special core analysis） review
2. SWCTT （single well chemical tracer test）
3. Material balance calculation
Based on the result of remaining oil saturation evaluation, a “type curve” that represents production and injection performance of a target area was established and by superposing the “type curve” as per the pattern development schedule, total field production profile was predicted.
