摘要
电缆式重复地层测试(RFT)通过测试流压、流动时间和恢复压力来获得地层参数。封隔器密封不好、探管或流管的堵塞会导致测试压力异常。文中讨论了低渗地层和压力亏空地层RFT测试的压力响应。对低渗地层应适当延长恢复时间以取准地层压力,而压力亏空地层则建议选择压降更大的第二预测试流动段来计算地层渗透率。
Wireline repeat formation tester (RFT) is used to obtain the formation parameters by testing flow pressure, flow time and the recovery pressure.When the packer seal fails, blockage in probe tube or flow pipe can lead to abnormal test pressure.This paper discusses the RFT pressure response in low permeability formation and depleted pressure formation.In low permeability formation, recovery time should be appropriately extended to take the accurate formation pressure while in depleted formation, it is suggested that the second pretest flow section with greater pressure drop is chosen to calculate formation permeability.
出处
《国外测井技术》
2014年第4期43-45,4,共3页
World Well Logging Technology
关键词
测试压力
低渗
流动时间
压力亏空
test pressure
low permeability
flowing time
pressure depletion
