Samples of diamond tools for drilling oil and gas wells possessing high wear resistance and performance have been developed. It is established that adding some transition metal compounds and optimization of the diamondcontaining composite materials production technology greatly improves the service properties and performance characteristics of the tools for drilling oil and gas wells. The results of industrial tests on solid rocks drilling using standard and newly developed diamond tools are reported. The application prospects of the developed tools for deep oil and gas wells are shown.

In order to improve the calculation precision of foam underbalanced drilling theory model, based on an investigation of fluid flow during a foam underbalanced drilling field application and using modern computational fluid dynamics (CFD), numerical simulation research on the flow lows of gas-liquid two phase annulus flow in foam drilling process is conducted. A flow field model for the 8 Ѕ " PDC bit at third open process in foam underbalanced drilling is established. Annulus pressure and gas-liquid flow laws of drilling fluid near the bit at different depth are analyzed in depth with field condition drilling parameters. The results of our simulation model and those of the field model are compared, the comparison reveals that the difference is less than 5.7%, which justifies the feasibility of our simulation model. The bottom hole pressure of different well sections is predicted and the results show that annulus flow rate decreases with increasing depth of the well section. For different gas injection rates and liquidbased foam injection rates, the bottom hole pressure of 8 Ѕ" PDC bit will increase if the liquid injection rate is increased or the gas injection rate is decreased. When the liquid injection rate is 250L/min, the gas injection rate should be greater than 40000 L/min, or the drilling efficiency will be impacted and, in the worse case, sticking accidents may happen.

Keywords: foam drilling, numerical simulation; power law, gas-liquid two phase flow, pressure prediction.

Belarusneft Company specialists detail a range of problems connected with coiled tubing drilling technology usage within certain formations. A great deal of attention is paid to the necessity of proper drainage zone and formation damage management in order to increase the effectiveness of oil field development. This article considers multilateral coiled tubing drilling experience in Belarus oilfields. Recommendations for further coiled tubing drilling usage and development are given.

An overview of the fields, reservoirs characteristics, production regimes, production performances, and current studies on enhanced oil recovery (EOR) for "Bach Ho" and "Rong" fields are given in this paper. In this article, reservoir structures, reservoir conditions, rock characteristics, fluid properties, oil displacement mechanism, current production regime and production performance, the availability of chemical-technique-technology, and the preliminary results of theoretical and experimental studies on some major EOR techniques are analyzed and evaluated in order to select the most promising EOR approaches for "Bach Ho" and "Rong" fields.

Keyword: enhance oil recovery, polymer flooding, polymer injection, surfactant injection, surfactant flooding

In this article the influence of creeping deformation of rocks on oil recovery of the oil deposit is studied by using a uniform grid of wells on a mode of the dissolved gas. For the hypothetical deposit developed using a square or triangular grid of wells with various density, it is established that oil recovery of a deposit with rock creep can be for 20-25% more than in deposits with a nonlinear - elastic environment.

Modeling of stratum during gas-condensate mixture filtration has been carried out on the basis of a binary model. For this reason the problem of determination of vertical stratum permeability change has generally been solved in a variational formulation. A design diagram has been developed and numerical experiments have been conducted.

In this article the numerical model of the solution of a problem of development is offered for a system of arbitrarily located wells in a gas field where rocks are deformed with creep. In the given example for a uniform grid of wells the influence of creep deformation of the rocks on the bottom hole pressure and porosity of the central hole is calculated for different values of the rock compressibility.

The arctic shelf possesses significant hydrocarbon (HC) reserves, though their development is impeded by severe environmental conditions. The need to overcome these difficulties is determined not only due to economic and political feasibility but also the technological feasibility of hydrocarbons exploration and production projects in the region. In the Arctic climatic conditions the application of proven hydrocarbon production technologies is rather complicated: the deposits are located far from the coast line, transport communications are practically absent, a long and very cold winter, the polar night, and the thickness of the ice cover reaches two meters or more. The use of underwater technology is the most challenging; it is based on the application of subsea well completion, with wellhead located on the seabed. Subsea fields may be completely independent, and used combined with fixed or floating technologic platforms. Sub-sea field development is the most advanced trend for the field development, whether in freezing or non-freezing seas, using the equipment for preparation and injection of fluids into a submarine version, including multiphase pumps, separators, compressor units and subsea drilling. Creating new subsea technology may drive the formation of resource-based economy to a new science-intensive development path.

Operational conditions of Russian oil-production wells are complicated with high gas-oil-ratio, temperature, water-oil-ratio, sand, well-bore curvature and small diameter. In this case for lowyield wells – less than 20 cubic meters per day – this is the most critical. Both electric submersible pumps and rod pumps in specified wells break down very often. But even in good low-yield wells, pump efficiency is very low – from 24% to 30%. Moreover gas presence at the pump intake reduces efficiency even more. So, design and use of alternative ways of wells testing and operation, that are able to provide higher productive time, is ongoing. Use of energy-saving equipment is necessary. Scientists from Russian Gubkin State University of Oil and Gas suggest that a complex jet pump unit for development and operation of low-yield wells can be used. Its installation consists of two basic elements: submersible equipment with christmas-tree elements and automated mobile ground surface unit for preparing and use of working liquids. Automation elements allow the monitoring of technological process in real time during the whole cycle of development and operation of wells.

Sand and other impurities coming from the reservoir during crude oil production cause serious disruptions in production. Downhole wire-wrapped filters SP "USS", which

• allow to preserve the formation structure,
• prevent falls,
• increase the formation permeability and
• reduce wear of downhole equipment

are an effective solution. In order to prevent clogging of the filter, gaps with trapezoidal cross-section are used. Wire-wrapped filters, with so-called gravel packing, have been widely used recently. These filters significantly reduce well preparation costs and increase the speed of installation of the liner with the filters. The technology of SP "USS" provides a solution of the fine sand problem, which enters the well, through forced stimulation to reduce the diameter of the sand granules up to 10 microns. Such sand is easily driven out. Special technology which does not change the chemical composition of the oil and has no side effects is applied for sand grinding.

One indicator of performance can be the amount of oil and gas companies oil and gas production per worker. Factors affecting productivity growth are changing logistical, organizational and socio-economic conditions both inside and outside the process of production, where reduced labor costs per unit of production, gives increased levels of productivity. Manifestation of these changes are very diverse and can appear not only as a specific event, but as underlying processes and phenomena. Productivity growth means real savings in labour, the implementation of which achieves the minimum cost of labour per unit of production or work (services). Provisions of labour may find both the means of production and living labour. Firstly one of them is to increase productivity through the use of new equipment and advanced technologies at all levels of the production chain and management, thus reducing the number of employees with growth in output. Secondly the replacement of unskilled labor with a significant influx of professionals from other sectors of the economy. This requires an increase in the share of specialists with higher and secondary special education in total employment and leads to ncreased demands for skills development. The most important task of the company is the constant search for and implementation of provisions of labour productivity growth, which refers to the existing, as yet unused real opportunities to increase productivity.

The paper presents the theoretical basis and practical aspects of production costs in the management system for oil and gas companies, as well as a mechanism of production cost control. The cost management system is based on the process and the process of reflection systems to fit into modern legislation regulating this activity. A decisive role in the enterprise cost management is the socio-economic activities of the people, which are closely linked to the production of oil and gas.

In article the structure of robust systems of identification of the vibratory condition and forecasting of forthcoming emergency conditions of compressor units is defined. On a basis of noise technologies of the analysis of vibration signals from the vibration control points the system software was developed. The results of operation of the system on Heydar Aliyev Baku Oil Refinery are given.