Experience in well construction using the Batch drilling at the Vietsovpetro JV fields

The conveyor batch drilling method was first implemented in Vietsovpetro JV in 2020 using Tam Dao 03 jack-up drilling rig during well construction on the new offshore fixed platform conductor block - BK-20. The project featured drilling and installation of 508 mm diameter surface casing in seven wells as part of a single technological program. The purpose of implementing this method was to reduce overall costs during the construction of a group of wells, as well as to increase the efficiency of interaction between various departments and services. The drilling experience on the BK-20 confirmed the high efficiency of the conveyor drilling method. The successful implementation of the method at BK-20 predetermined its application at other offshore facilities of Vietsovpetro JV. However, despite the obvious advantages, the implementation of the conveyor drilling method also revealed some peculiarities. For example, the start of operation of individual wells in a group is delayed for some time compared to sequential drilling, which in turn can potentially affect production volumes in certain periods. This paper examines both the positive aspects of using the conveyor drilling method, as well as the identified limitations and technical features that affect its further implementation within the framework of the drilling programs of Vietsovpetro JV.