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试井解释的近井地带表皮系数,是评价油气井产能和完井效果的重要参数。然而利用产能测试压力曲线确定的表皮系数,是一个总表皮系数,不能反映地层的真实情况。总表皮往往包含打开程度表皮系数、射孔密度表皮系数、泥浆污染表皮系数和高速湍流表皮系数,总表皮包含的前三项表皮是人为造成的,定义为机械表皮,最后一个表皮是地层流体流动产生的,与产量相关定义为产量表皮。基于文献,对总表皮进行分解,有助于了解地层真实污染程度,采取合理解堵、增产措施,提高产量,增加经济效益。
The near-well zone skin factor explained by well testing is an important parameter for evaluating well productivity and completion effect. However, the skin coefficient determined by the pressure curve of the productivity test is a total skin factor that does not reflect the real situation of the formation. The total epidermis usually contains open degree epidermal coefficient, perforation density epidermal coefficient, mud-contaminated epidermal coefficient and high-speed turbulent epidermal coefficient. The first three epidermis contained in the total epidermis is artificially created and is defined as a mechanical epidermis, the last epidermis is the formation fluid flow Produced, and yield-related as the production of the epidermis. Based on the literature, the decomposition of the total epidermis helps to understand the true level of formation contamination, take reasonable measures to plug, increase production, increase production and increase economic efficiency.