垂直裂缝气藏中凝析油气试井模型及应用

A Well Testing Model for Flow Condensate Oil Gas in Vertically Split and Its Application

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.

In the process of the condensate gas, exploitation,vertical cracks were producedafter fracturing, fluid in the layer and fracture was often formed bilinear flow. One side,according to he seepage flow characteristics of condensate gas in vertical fracture is formedbilinear flow, in this paper through condensate oilgas unsteady seepage equation, after theywere linearized, conductivity fracture and skin effect were considering and the Laplace trans-form was applied, a new model of condensate oil and gas seepage about bilinear flow in verticalh-acture gas reservoir was established and the solution of the model was worked out. On theother hand, the well testing theory chart of condensate gas reservoir was drew out, and onthe basis of the well testing data, the corresponding formation parameters can be calculated,for instance, inplace permeability about condensate gas well, the pressure of the gas reservoir,conductivity fracture and the skin factor of crack, and then the dynamic parameter and thecorresponding theoretical basis for gas reservoir development was provided.