论文部分内容阅读
通过对低渗透致密储层气井试井特殊问题的专题研究，形成了几点认识：①低渗透致密储层中气体渗流阻力主要是细小孔隙喉道处的水化膜造成的；②水化膜表面两侧压差大到一定程度时，气体才能冲破水化膜的阻力而流动；③气体流动过程中压力梯度小到一定程度时，水化膜又形成，流动停止。基于以上认识有针对性地建立了试井模型，用幂级数解法求出模型的解析解；就计算试井标准曲线问题作了算法研究，并总结了这种特殊渗流机理在试井曲线上的特征反映及变化规律
Through the special study on the well testing of gas well in low permeability and tight formation, several understandings have been formed: ① The gas seepage resistance in the low permeability and tight reservoir is mainly caused by the hydration film at the fine pore throat; ② The hydration film The pressure on both sides of the surface is large to a certain extent, the gas can break through the resistance of the hydration membrane and flow; ③ gas pressure in the process of flow is small to a certain extent, the hydration film is formed, the flow stops. Based on the above understanding, a well testing model was established and the analytic solution of the model was solved by the power series solution method. The algorithm of calculating the well testing standard curve was studied and the special seepage mechanism was summarized on the well testing curve The characteristics of reflection and changes in law