Improving the efficiency of the Pavlovskoye field development through the reconstruction of wells by drilling sidetracks (on the example of object T)
The study was aimed at a comparative analysis of the exploitation efficiency of the Tournaisian reservoir by sidetracks and sidetracks with a horizontal ending in the Pavlovskoye field. One of the most effective technologies that allows to achieve an increase in the level of oil production in old fields (late stage of operation) and increase the oil recovery factor from the reservoirs, to return to operation oil wells that could not be returned to the existing fund by other methods is sidetracking. By drilling sidetracks, previously unused sections of the reservoir are introduced into development, as well as unconventional oil reserves, the extraction of which was not previously possible. The advantage of drilling sidetracks is that there is no need to build new communications. This reduces the cost of equipment and materials, reduces the negative impact on the environment. In addition, restoring an inactive well stock is 1.5-2.5 times cheaper than drilling new wells. The article analyzed the construction and operation of 54 sidetracks drilled for the Tournaisian object, 6 of them with a horizontal ending. The following issues of with sidetracks and sidetracks with a horizontal ending were considered: comparison of technological aspects of well construction; comparison of the well operation indicators dynamics; comparison of the initial filtration parameters of productive formations and analysis of their changes during the operation of wells. The result of the work was the conclusions on a comparative analysis of the exploitation of the Tournaisian reservoir by sidetracks and sidetracks with a horizontal ending. The results of the work were of practical importance and could be used in the production activities of oil and gas companies.