Research of Overflow Real-time Evaluation Method Based on Intelligent
Drill String During Manage Pressure Drilling

doi:10. 3863/j. issn. 1674 – 5086. 2013. 03. 011

Abstract

Abstract:

Based on the analysis of the problem of traditional overflow evaluation method，we study a kind of real-time overflow
evaluation method using intelligent drill string. With this method we can determine the size and location of the overflow by
monitoring the influx rate into the wellbore，as the distributed sensors along the drill string enable us to divide the annulus
into many control volumes. We build the real-time calibration models of pressure measurement at distributed sensors along the
intelligent drill string. Field test shows that overflow occurs where the well pressure is close to the pore pressure. The method
can accurately predict the influx rate into the wellbore and the location of overflow within 100 seconds after the initial overflow
and therefore is of great instantaneity and reliability.

Key words: overflow, manage pressure drilling, intelligent drill string, real-time, hydraulic model

Xiong Jiyou1, Rong Jiguang1, Tian Zhixin2, Wang Meng3, Yu Xianchao4. Research of Overflow Real-time Evaluation Method Based on Intelligent
Drill String During Manage Pressure Drilling[J]. 西南石油大学学报(自然科学版), DOI: 10. 3863/j. issn. 1674 – 5086. 2013. 03. 011.

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