The Development and Testing of Lost Circulation Position Detector
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摘要: 钻井液漏失危害严重，一旦发生井漏需要及时准确判定漏失位置，目前，井底漏失层位较易判断，但针对其他井深位置的漏失，漏失层位的判断非常困难。为解决这一问题，研制了一种判定漏层位置的测量仪器，可以通过测量温度、压力和流量3种参数，综合判定漏层位置。该测量仪采用短节的方式安装于近钻头位置，可随钻具下入井眼进行测量。该测量仪在胜利油田营96-斜1井进行了现场试验，结果表明，其对漏层位置的判定具有较高的精度，可节省测量时间，为堵漏方案的制定提供参考，但该测量仪在测量数据的实时性上还需要进一步提高。Abstract: Since the loss of circulation of drilling fluids may result in severe hazards,proper measures should be taken promptly when circulation is lost.Accurately determining precisely where the drilling fluids are being lost is of great importance for timely implementation of a relevant remedy.At present,it is much easier to identify the formations responsible for the lost circulation when it occurs at bottomhole than at other positions in the hole.Under such circumstances,an innovative detector to identify the precise location of circulations losses has been developed.By using three key parameters,temperatures,pressure and flow rate,the detector can effectively determine specific position of lost circulation.The detector can be installed near the bit by using subs,and can be delivered with drilling tools.Field testing of the innovative detector has been conducted in Well Y-96-X-1 of the Shengli Oilfield.Testing results showed that the innovative detector can be used to determine the position of lost circulation.In addition to saving time in measurement,the detector may provide valuable references for preparation of emergency programs in drilling fluid circulation lost.More studies are required to further enhance real-time performances of the detector.
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