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引发井筒效应的因素很多 ,在分析每种特殊井筒效应的起因时必须结合地层物性、相态变化、压井液比重和地层产出物等资料进行全面、细致地分析。本文具体分析了高比重压井液+复合测试管柱、油水两相 +多层、凝析气凝析引起的 3种特殊类型的井筒效应。通过分析 ,搞清了流动曲线和恢复曲线出现异常的原因 ,为测试资料的解释扫清了障碍
There are many factors that cause the wellbore effect. When analyzing the cause of each special wellbore effect, it is necessary to make a comprehensive and detailed analysis based on the information of formation properties, phase changes, killing fluid proportion and formation output. In this paper, three kinds of special wellbore effects caused by high specific gravity kill fluid + composite test column, oil-water two-phase + multi-layer and condensate gas condensate were analyzed in detail. Through the analysis, we find out the reason of the abnormality of the flow curve and the recovery curve, cleared the obstacles for the interpretation of the test data