Back to issue SOLUTION OF CATASTROPHIC ABSORPTIONS PROBLEMS IN THE PRODUCTIVE HORIZON - MUD DRILLING WITH HOLLOW GLASS MICROSPHERES AT THE SREDNEBOTUOBINSKOYE FIELD
UDC: 622.245.422(076.5)
DOI: 10.33285/0130-3872-2021-9(345)-22-30
Authors:
1 Taas-Yuryakh Neftegazodobycha, Irkutsk, Russian Federation
2 IF LLC "RN-Burenie", Irkutsk, Russian Federation
3 Irkutsk National Research Technical University, Irkutsk, Russian Federation
4 Institute of the Earth's Crust SB RAS, Irkutsk, Russian Federation
Keywords: loss of circulation, productive horizon, hollow glass microspheres, abnormally low reservoir pressure, drilling
Annotation:
Hydrocarbon deposits at the Srednebotuobinskoye field can be classified as hard-to-recover reserves, the development of which is associated with significant risks of geological complications like losses in the completion cycle. The analysis of well construction in the field under study proves the fact that losses elimination while drilling the Botuobinsky (Bt) productive horizon is the most common cause of non-productive time (NPT), taking up to 25 % of the total NPT of wells construction. Primary penetration is complicated by drilling in conditions of abnormally low reservoir pressures (ALRP). Traditional solutions of the problem of the circulation loss in productive horizons with ALRP can cause an increase in the cost of well construction and contamination of the bottomhole zone of the productive horizon. Standard methods of loss circulation elimination at the Srednebotuobinskoye field are ineffective and very costly. In these conditions, non-standard solutions of the problem are required, which, first of all, should be rational and cost-effective in the conditions of the Eastern Siberia. Hollow Glass Microspheres technology is a novelty in drilling and loss circulation technology, and, unfortunately, there is very little experience of its application in domestic and foreign industry.
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