«Onshore and offshore oil and gas well construction»

On the use of a multi-zone cable humidity sensor for monitoring the condition of a well cement stone

UDC: 62-913
DOI: -

Authors:

¹ National University of Oil and Gas "Gubkin University", Moscow, Russia
² INZHIMATIK, Moscow, Russia

Keywords: well cementing, casing strings, cement mixture, humidity, electrical capacity, scale factor, sensor, detector

Annotation:

The research conducted by the authors of the article is aimed at creating a system of continuous monitoring the condition of a casing cement stone by using cable humidity sensors placed in the most problematic intervals of the well during cementing operations. The authors of the article demonstrate the possibility of using a multi-zone cable humidity sensor. The main advantage of a multi-zone cable sensor is the possibility of distributed monitoring of cement stone in extended sections of the well by depth. The effect of the multi-zone cable sensor shell humidity on its electrical capacity under air drying and during the drying of the cement mixture under different conditions was assessed. The dependence of the sensor working surface length on its electrical capacity was studied. Based on the studies performed, the possibility of using a multi-zone humidity sensor to monitor the condition of cement stone in oil and gas wells under water influx conditions was shown.

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