Research solutions and completion of unloading operations with Nitrogen lifting method in the oil production wells with dual string at Pearl oil field,

Abstract

Rehabilitation for multistage production wells is relatively complicated, especially for wells because the design is not really suitable in the well development stage after a long time of prodution. The production wells at the Pearl rig are currently having problems recovering the permeability of the reservoir. For the purpose of increasing the exploitation flow of the well and restoring the output for wells with long service life, the process of calling the product flow after the end of well drilling and well repair campaigns is extremely difficult. Plays a key role in the exploitation of oil and gas wells. However, some current calling methods are not suitable, costly and have low efficiency due to a number of reasons such as technical errors when completing wells, as well as the initial time when investors had different methods. The application method is not suitable, causing the exploitation well to bring low efficiency. Therefore, the research team investigated the production modes and then proposed production recovery scenarios for the wells using liquid nitrogen combined with the existing techniques at the rig that are suitable for the circumstances in Vietnam. Mining rigs have a tight workspace design. In addition, the solution helps to reduce the cost as well as the complexity of the working process at the marine works, bringing both economic and technical efficiency to the restoration of degraded wells. About the catch, without using other stream calling methods.