Technology for formation pressure and annulus casing pressure measuring in wells equipped with production packers

The paper presents the results of pilot testing of an innovative modular downhole measuring system ALGA-GIK-28 for wells equipped with sucker rod pumps and production packers. This system was developed to reduce high maintenance costs for conventional permanent monitoring systems which require a workover crew to pull the pumping equipment out of hole for replacement, resulting in significant operational expenses and production losses. The key innovation of the system lies in its modular design, comprising a permanent downhole crossover installed on the tubing string and a retrievable measuring module equipped with pressure and temperature sensors. The module can be quickly run in hole and pulled out using a standard wireline through the annulus without the need for well shut-down or a workover crew. The paper provides details on mechanics of the module setting, locking, and tight connection within the crossover. The results of tests at TATNEFT PJSC field confirmed functional reliability of the system in-situ. These tests demonstrated efficient operation of the valve system, tightness of connection, and reliability of below-packer and annulus casing pressures measurement under well dynamic behavior. It was found that this technology reduces the measuring system replacement time by 24 hours compared to conventional methods. The implementation of the presented system is a technological shift in the field of real-time monitoring of production process parameters, paving the way for the development of more flexible, cost-effective, and efficient monitoring systems. This contributes to optimizing well inventory management and reducing operational expenses.