Research and application of new borehole prevention technology in Bohai A Oilfield
At the initial stage of exploration and development of Bohai A Oilfield,shallow large displacement wells are mainly used,and the upper extremely loose formation has a large deviation.It is necessary to trim the borehole wall and clean the borehole through frequent tripping operations to reduce the probability of downhole complications.However,it is easy to cause new borehole in the process of reaming and trimming the borehole wall.In view of this problem,the research is conducted from various aspects such as well loca-tion selection,trajectory design,drilling tool combination optimization,real-time simulation during drill-ing,and operational details.Finally,a new borehole prevention technology system was proposed that in-tegrates pre-drilling design optimization,fine operation during drilling,and tripping risk monitoring,which has achieved good results in the application of Bohai A Oilfield.
Bohai Oilfieldnew boreholepreventive measuresextended reach well
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