基于水驱特征曲线的注采比优化研究

摘要

At present,most onshore oilfields are in the middle and high water cut period.In order to control the water cut,increase the production of crude oil,and realize the efficient development of oilfield,the injection -production ratio of reservoir should be more accurate.The injection -production ratio and water drive characteristic curve are derived from the injection production relationship and water drive characteristic curve of sandstone oil field.The model uses simple parame-ters,needs less production dynamic data,and the prediction results are more accurate,which is suitable for the reservoir with less dynamic and static parameters.Through the example of a onshore oilfield development,the model has good predic-tion effect,high accuracy,and can be extended to other reservoirs,which can guide the prediction and adjustment of reser-voir injection -production ratio.%目前陆上大多数油田都已进入中高含水期，为了控制含水上升速度，提高原油产量，实现油田的高效开发，需要准确的确定油田注采比。应用注水开发砂岩油田的注采关系和水驱特征曲线推导出注采比预测模型。该模型使用参数简单，只需要较少的生产动态数据，且预测结果准确，适用于动静态参数较少的油田。通过对某陆地油田开发实例进行分析，研究结果表明，该模型预测效果好，精确度高，可以推广到其它油田，从而指导油田注采比的预测与调整。