The most common complications during the construction and operation of wells, such as gas and water showings and interstratal crossflows, in most cases result from seal failure of the annular space caused by cracking and destruction of the cement ring. The main way to improve the stability and tightness of well support is a rational cementing technology using high-quality plugging materials. Recently, due to the toughening of environmental requirements for a number of chemical reagents used for the treatment of plugging solutions, the most expedient in terms of increasing the fracture strength of a stone has become a method for developing plugging materials from several components with different physicochemical and physicomechanical properties. These are dispersed-reinforced materials, which are a mixture of backfill cement and mineral or artificial fibers, as well as organic fibrous additives from cellulose, jute, cotton, etc. The article discusses the results of studies of expanding reinforced plugging solutions in order to study their main technological and strength characteristics.

No abstract

The article considers the relevance of increasing the efficiency of development of offshore shelf deposits in the North Caspian, using the example of the oil and gas condensate field named after Y. Korchagin. The development of offshore fields is associated with the use of the latest expensive technologies aimed at highly efficient development of facilities with hard-to-recover hydrocarbon reserves. The involvement of field operators in the development of expensive imported technologies leads to a significant increase in the cost of oil produced. In this regard, there is a need for testing and introducing similar domestic technologies into the offshore field development process to optimize the hydrocarbon production process.

The article describes the commercial experience of using various compositions of process fluids during repair and insulation works and substantiates the practical value of solutions on a biopolymer basis. The results of laboratory studies are presented and the compositions of process fluids on a biopolymer basis for well repair are proposed. The preservation of the natural permeability of the reservoir in the near-wellbore zone is one of the main requirements for quality well repair. However, as the field practice shows, the overhaul is almost universally carried out with the use of process fluids, the parameters of which are chosen without taking into account the specific geological conditions, the lithologic and physical properties of the reservoir and the physicochemical characteristics of its fluids.

No abstract