CAJ | 학술논문

建立泡沫井筒流动模型与泡沫地层渗流模型，得到完整的泡沫混排解堵数学模型；利用数值方法对模型进行耦合求解，得到泡沫压力，质量，密度在井筒中的分布及井口井底压力的变化规律。在固定井口回压情况下，得到井底压差的变化规律。结果表明：随着井深的增加，泡沫压力增加，质量减小，密度增加；固定井口回压，井底压差则逐渐变小。
건립포말정통류동모형여포말지층삼류모형，득도완정적포말혼배해도수학모형；이용수치방법대모형진행우합구해，득도포말압력，질량，밀도재정통중적분포급정구정저압력적변화규률。재고정정구회압정황하，득도정저압차적변화규률。결과표명：수착정심적증가，포말압력증가，질량감소，밀도증가；고정정구회압，정저압차칙축점변소。
With a model of foam wellbore flow and a model of foam seepage flow, a mathematical model of foam plug removal is given. The model is solved with numerical method. Distributions of foam pressure, foam quality, foam density along wellbore and wellhead and bottom pressure are discussed. Furthermore, variation of bottom hole differential pressure is given as wellhead back pressure is fixed. It shows that as foam pressure and density increases,foam quality decreases with increase of well depth and bottom hole differential pressure declines.