摘要: Although the injection of drive water continues as of this writing and a complete evaluation is not possible, this report discusses the current working evaluations and performance predictions. Oil response to date has been disappo... 展开 Although the injection of drive water continues as of this writing and a complete evaluation is not possible, this report discusses the current working evaluations and performance predictions. Oil response to date has been disappointing and a total of 26,734 barrels of oil have been recovered to date with the South Pattern producing sixty percent more oil than the North Pattern. The forecast for total oil recovery is 29,800 barrels for the North Pattern. No forecast for total oil recovery in the South Pattern is available. It is expected, however, that the project will yield a total oil recovery efficiency which is less than half of the original predictions. Current operations are intended to optimize oil recovery utilizing the previously inactive pressure monitoring wells. Daily oil production, which is in excess of 35 barrels per day, is sufficient to generate revenue in excess of daily operating expenses. It is anticipated that the project operations will continue as long as oil production justifies the expense. The disappointing oil response has been attributed primarily to the inability of the designed preflushes to yield a salinity environment within the reservoir which was within the optimal salinity range for the surfactant (micellar) systems. The surfactants were, therefore, significantly less efficient at oil mobilization than expected. The extended lifetime of the project is due to a substantially lower injectivity than expected which prolonged fluid injection. Although this has been corrected to some degree, decreased productivity in the producing wells continues to keep project injection rates at lowered levels. The project must be classified as both a failure and a qualified success. Substantial volumes of oil were shown to be mobilized within the reservoir but only limited volumes of this mobilized oil are expected at the producing wells. 128 figures, 30 tables. (ERA citation 08:055449) 收起