Analysis of Thermal Recovery Horizontal Well Drilling Technology in Gudong Nine District

QIN Guanghui, GAO Xiangsen, YAN Zhenlai


The thickness of oil reservoir in Gudong nine district is normally 2 to 8 m. The upper parts of this reservoir are fluvial facies. Also, the sand body is a positive rhythm combination, which includes fine sandstones, coarse sandstones, argillaceous siltstones and mudstones from top to bottom. The mine type of oil wells in this area is the thermal recovery horizontal well, which is normally featured in shallow, weak formation (easily to collapse) and unmanageable wellbore trajectory. Considering drill bits, drill stem structure and drilling parameters, the horizontal well drilling technology combines the horizontal well completion technique and MEG drilling fluid system. It has been proved that this technology is especially good at increasing drilling speed and efficiency.
Key words: Horizontal well drilling technology; Weak formation; Wellbore trajectory; MEG drilling fluid; Well completion technique


Horizontal well drilling technology; Weak formation; Wellbore trajectory; MEG drilling fluid; Well completion technique

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