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Technical difficulties and countermeasures of AZNN-004 horizontal well drilling in the Azadegan oilfield of Iran

Yang Xiao-feng

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Abstract

The Azadegan oilfield in northern Iran has complex geological conditions,limited data of offset wells,and drilling difficulties such as likely azimuth drift in upper hole section,difficult to control wellbore trajectory and uncertain geologic target.The drilling practice of Well AZNN-004 in this oilfield has been employed to optimize BHA and wellbore trajectory.With the help of geosteering technology and friction hydraulic analysis technology,the above drilling difficulties have been overcome,thereby greatly improved drilling success ratio,reduced cost and guided horizontal well drilling operations in this oilfield.

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What this paper is about

The Azadegan oilfield in northern Iran has complex geological conditions,limited data of offset wells,and drilling difficulties such as likely azimuth drift in upper hole section,difficult to control wellbore trajectory and uncertain geologic target.The drilling practice of Well AZNN-004 in this oilfield has been employed to optimize BHA and wellbore trajectory.With the help of geosteering technology and friction hydraulic analysis technology,the above drilling difficulties have been overcome,thereby greatly improved drilling success ratio,reduced cost and guided horizontal well drilling operations in this oilfield.

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Available abstract

The Azadegan oilfield in northern Iran has complex geological conditions,limited data of offset wells,and drilling difficulties such as likely azimuth drift in upper hole section,difficult to control wellbore trajectory and uncertain geologic target.The drilling practice of Well AZNN-004 in this oilfield has been employed to optimize BHA and wellbore trajectory.With the help of geosteering technology and friction hydraulic analysis technology,the above drilling difficulties have been overcome,thereby greatly improved drilling success ratio,reduced cost and guided horizontal well drilling operations in this oilfield.

Key concepts: Petroleum engineering, Drilling, Wellbore, Geology, Directional drilling, Measurement while drilling, Offset (computer science), Drilling engineering

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