Experience in the application of technologies for the inter-column pressures elimination in producing wells of the North Caspian fields

The development of offshore fields in the Northern Caspian Sea is a rare and unique project for the Russian Federation. The Yu. Korchagin field is the first offshore hydrocarbon development project in the Russian Federation. During the development, operation, production, and transportation of carbon-hydrogen raw materials from the field, some problems were identified, such as premature water breakthrough, gas breakthrough, the presence of a gas cap, an inappropriate type of completion, failure to meet targets and requirements, which may lead to the failure to achieve the desired oil recovery coefficient. For PJSC Lukoil, it is necessary to conduct a more thorough analysis, identify the reasons for solving problems, and make decisions on liquidation. One of the main problems of well construction in the fields of the Northern Caspian Sea is to ensure the quality of casing cementing, especially in areas of abnormally high reservoir pressure. The increase in drilling depths and the complication of geological conditions make it difficult to solve this problem. A special place in this issue is occupied by the problem of the appearance of inter-column pressures. The primary technological task and problem of LUKOIL-Nizhnevolzhskneft, LLC is the search for new technologies and chemical compounds for the successful liquidation of inter-column pressures in wells and the implementation of such operations in the shortest possible time. The contractor has implemented two effective methods to solve this problem. The article discusses methods for reducing inter-column pressure and the effectiveness of their application at the North Caspian field, as well as planned and ongoing measures to minimize the risk of intercolonial flows during well construction