公开(公告)号：US20160245948A1

公开(公告)日：2016-08-25

申请号：US15145991

申请日：2016-05-04

Applicant: Schlumberger Technology Corporation

Inventor： Sicco Beekman ,  Tong Zhou ,  David Alan Alan ,  Christian Stoller

IPC: G01V5/10 ,  G01V5/04

CPC classification number: G01V5/102 ,  E21B47/00 ,  E21B47/1015 ,  G01V5/045 ,  G01V5/10 ,  G01V5/101 ,  G01V5/104 ,  G01V5/125

Abstract: A method for evaluating wellbore conduit condition includes using measurements of at least one of (i) inelastic gamma rays made during emission a burst of neutrons into the conduit from within the conduit at at least one spaced apart location from a position of the emission and (ii) epithermal neutrons or capture gamma rays therefrom detected at at least two spaced apart locations from the position of the emission within a selected time after the emission. The at least one of the measurements of inelastic gamma rays and epithermal neutron or capture gamma ray counts are characterized to estimate an amount of loss of iron in the conduit.

Abstract translation: 一种用于评估井眼导管状况的方法包括使用以下至少一种的测量：（i）在从发射位置的至少一个间隔开的位置处从导管内将中子爆发期间发射的中子期间产生的非弹性γ射线和（ ii）从发射之后的选定时间内在发射位置的至少两个间隔开的位置处检测到超热中子或捕获其γ射线。 非弹性γ射线和超热中子或捕获伽马射线计数的测量中的至少一个的特征在于估计导管中铁的损失量。