Application of diminishing curve method in SEC standard evaluation of oil and gas reserves：A case study in Wangji Oil Field

In the evaluation of proved developed reserves of SEC,the diminishing curve method was commonly used to judge the remaining economic recoverable reserves during the middle and late periods of oil field exploration.A case study was carried out in the Wangji Oil Field and proved that proper curve type and diminishing rate should be chosen based on the present exploration principle and stage.In this way,evaluation results will be more objective and accurate.