Perm Journal of Petroleum and Mining Engineering (Sep 2018)
The design of geological exploration with side track drilling
Abstract
The paper discusses the method of well reconstruction using sidetracks drilling as a method for searching prospective formations in Perm region. At the moment, there are small-size reservoirs of less than 100 thousand tonnes of resources included in located and prepared formations. Drilling of the reservoirs is unprofitable. Drilling a sidetrack from wells located near promising reservoirs can be more economical way to solve the problem. Drilling of sidetracks has become one of the most investment-attractive technologies aimed at stabilizing and further increasing oil production from fields being developed. This method is used to intensify the system of field development, increase the rate of oil extraction from productive formations and actually replaces the compaction of the well grid. Appropriate technologies help to save a well as well as construction and development costs. In presence of candidate wells, including plugged and abandoned one, located near promising structures, it becomes important to search for them using sidetrack drilling as a method of geological exploration. The paper describes the technology of side tracks construction and presents the algorithm of works designed. Well stock of LUKOIL-PERM LLC and geological structure of promising objects were analyzed. The technical possibility of well reconstruction by sidetracking was considered. Criteria for candidate wells and “window” kickoff intervals to be selected are defined. Calculation of profiles of second well bores for recommended wells was made, various aspects related to their construction were worked out. As a result of the work it was proposed to include these activities in the geological exploration program of LUKOIL-PERM LLC. Results of the work have practical significance and can be used in production activities of oil and gas companies.
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