公开(公告)号：US3789217A

公开(公告)日：1974-01-29

申请号：US3789217D

申请日：1970-02-10

Applicant: DRESSER IND

Inventor： YOUMANS A

IPC: E21B47/10 ,  G01F1/704 ,  G01V5/10 ,  G01T1/16

CPC classification number: E21B47/1015 ,  G01F1/7042 ,  G01V5/102

Abstract: This specification discloses a system for obtaining a water production profile of a producing oil well. A logging instrument is used having a deuterium tritium neutron source. A detector is mounted in the tool above the neutron source and an inflatable bag is positioned between the source and this detector. A positive displacement pump, servo-controlled from the surface, is provided to permit precisely determined amounts of liquid to be pumped into the bag from the borehole to thus vary the transit time of the borehole fluid from the source to the detector by a known amount. A second detector is positioned below the neutron source to detect whether any downward circulation in the borehole takes place. In an alternative embodiment, a pair of detectors are positioned on the same side of the source within the borehole instrument.

Abstract translation: 本说明书公开了一种用于获得生产油井的水生产特征的系统。 使用具有氘氚中子源的测井仪器。 检测器安装在中子源上方的工具中，并且可充气袋位于源和该检测器之间。 提供从表面伺服控制的容积式泵，以允许精确确定量的液体从钻孔泵送到袋中，从而将井眼流体从源到检测器的传播时间改变为已知量 。 第二个检测器位于中子源的下方，以检测钻孔中是否发生任何向下循环。