双产量流动测试资料的扩展应用

Extended application of two-rate flow testing data

陈元千 郭二鹏

中国石油勘探开发研究院，北京 100083

Research Institute of PetroleumExploration and Development, CNPC, Beijing 100083, China

双产量流动测试是一种不关井的试井方法，该方法是通过2个工作制度的生产测试完成，在第一个工作制度测得稳定产量的条件下，改变为第二个稳定产量的工作制度，测其相应的井底流压变化，即可完成双产量流动测试工作。由双产量流动测试的资料解释，可以确定有效渗透率、表皮系数、原始地层压力，确定附加压力损失、流动效率和井底有效半径。由于Russell提出的解释方法具有不关井测压的特点，因此引起了人们的普遍关注。考虑到Russell方法的重要性和原文推导中存在的不完善性，为便于正确地理解和应用，对其方法进行了系统的推导，并扩展了方法的应用范围，使原方法由确定有效渗透率、表皮系数和原始地层压力扩展到确定附加压力损失、流动效率和井底有效半径。实例应用表明，提出的解释方法是实用有效的。

Two-rate flow testing method is a kind of flow test method without shut蛳in well. It is applied through two production tests under
two flow rates. It can get the test result under the first production period until it is stabilized, and change it to the second production
period, record the bottom well bore pressure variance and the two rate flow test is accomplished. From its results, the effective
relative permeability, skin factor, original reservoir pressure, additional pressure drawdown, flow efficiency and effective wellbore
radius can be determined. Because this method doesn爷t need shut-in well, it’s more attracting many people’s concern. Considering
the importance of Russell method, this paper gives a completed derivation and expands its application range. The original Russell
method is mainly used to determine effective permeability, skin factor and original reservoir pressure. Now it is extended to define
the additional pressure drawdown, flow efficiency and effective well bore radius.