定流压抽汲井产能预测方法

Forecasting methods of swabbing well productivity at constant flowing pressure

刘洪 王新海 王祖文 毕全福

长江大学，湖北 荆州 434023 新疆石油管理局，新疆 克拉玛依 834027

目前越来越多的油井靠抽汲方式进行生产，对抽汲井不同流压下产能进行预测成了迫切需要解决的问题。在建立定流压抽汲井数学模型基础上，分别就不同的最大抽汲流压计算了抽汲井日产量。对日产量数据拟合分析后得出了不同流压的月平均日产量和年平均日产量IPR曲线；对日产量数据回归分析得到了同一流压的幂函数模型，可以预测抽汲井未来日产量。从研究结果看，建立的预测模型反映抽汲井产能是随着地层能量衰竭逐渐降低。

Because more and more wells are producing by swabbing way at present, the production prediction of swabbing well becomes
an urgent problem at different flowing pressure. The daily production of swabbing well at different swabbing flowing pressure was
calculated based on the mathematics model of swabbing well at flowing bottomhole pressure.The IPR curves of average daily
production of per month and per year at different flowing pressure were obtained by fitting analysis of daily production data. The
power function model of same flowing pressure is obtained by regressing analysis of daily production data.The model can be used to
forecast the future daily production of swabbing well. The prediction model reflects that the productivity of swabbing well will be
gradually reduced with the depletion of formation energy in terms of the research result.