Research solutions and completion of unloading operations with Nitrogen lifting method in the oil production wells with dual string at Pearl oil field, Block 01&02

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