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Comprehensive Detectable Method of Mini-leakage in Casing and Its Application
Author(s): YANG Yongjie, NIU Buneng, FU Qiang, WANG Wei, WANG Lining, ZHOU Ke
Pages: 485-
490
Year: 2014
Issue:
4
Journal: Well Logging Technology
Keyword: logging application; casing; mini-leakage; flow curve; differential temperature curve; efficiency of the leakage detection;
Abstract: 综合利用自然伽马、磁定位、温度计、流量计、多臂井径及磁测井等测量仪器,在压裂车稳定注水打压及稳压条件下结合定点及持续测量方式测量油水井中流量及微差井温变化,综合寻找套管漏失点准确位置.当漏失量较大时,可通过定点打压测量流量以确定可疑漏失井段,再通过稳压连续测量确定确切漏失点位置,提高了测漏的时效;当漏失量较小时可在稳压条件下,连续向下测量微差井温,在微差井温异常点上下打压测量流量变化验证该异常;微差井温拐点可以精确确定漏失点位置,但并非所有温差变化均可以解释为套管漏失,漏失点的确定需要综合上下测量点流量变化及不同测速下流量曲线综合判断.将该综合测漏的新思路应用于现场测漏作业中已经取得初步成功.
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