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凝析气井经过压裂产生垂直裂缝,流体在地层与裂缝中往往形成双线性流.根据凝析气形成的双线性流渗流特点,通过凝析油气不稳定渗流的基本微分方程,经过线性化处理,考虑裂缝传导能力和表皮效应,应用拉普拉斯变换,建立了垂直裂缝气藏中凝析油气渗流的双线性流的新模型,求出了模型的解.并绘出了凝析气藏试井理论曲线,通过试井测试资料解释,可计算凝析气井的地层渗透率,气藏压力,裂缝传导能力和裂缝表皮系数等相应的地层参数,可为气藏开发提供动态参数和理论依据.
According to the characteristics of bilinear flow formed by condensate gas, by condensing the basic differential equations of unsteady seepage of oil and gas, through the linear Based on the Laplace transform, a new model of bilinear flow of condensate oil and gas seepage in vertical fractured gas reservoirs was established, and the solution of the model was obtained. Analysis of well test curve of gas reservoirs, through interpretation of well test data, can calculate corresponding formation parameters such as formation permeability, gas reservoir pressure, fracture conductivity and crack skin coefficient of condensate gas well, which can provide dynamic parameters for gas reservoir development And theoretical basis.