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表皮系数是识别和诊断地层伤害程度中最重要的参数,它的大小直接反映地层伤害和产能损失情况。本文提出总表皮系数表达式,分析试井解释的表皮系数可靠性,然后根据实验确定污染后初始表皮。由于表皮系数是一个随着井底各个参数尤其是压力不断变化而变化的值,因此基于对模拟的和实测的压力进行连续对比,得到了迪那某井表皮系数随着施工泵注排量及施工压力变化趋势,为迪那气藏下一步酸化改造的可行性验证以及压裂改造现场实施提供了有效的指导参数。
The skin factor is the most important parameter to identify and diagnose the degree of formation damage, and its size directly reflects the formation damage and loss of productivity. In this paper, the expression of total skin factor is proposed, the reliability of skin factor explained by well test is analyzed, and then the initial skin after contamination is determined according to the experiment. Since the skin factor is a value that varies with the various parameters of the bottom hole, especially the pressure, it is based on a continuous comparison between the simulated and measured pressures that the skin factor of a certain well in Dinah with the pump displacement and The trend of construction pressure changes provides valid guidance for the feasibility verification of the next acidification retrofit of Dina gas reservoir and the implementation of the site of fracturing.