It is shown, that along with the classification of oil and gas reserves their stucturing is expedient. In addition the correction of the reserves estimation methodology and 3D computer modeling is required.

Paper present bottom-hole production monitoring results in case of commingled production by ESP pumps. Particularized down-hole equipment is used for production management from commingled formations. Ways of technological improvement of measurement and interpretation are presented. Case study shows long-term bottom-hole production monitoring in case of commingled production may be used not only for production control but also for estimation of reservoir pressures and productivity index and permeability of each formation. It is also possible for multiphase flow.

The purpose of the study is to justify selection of a certain EOR technology based on the results of its practical application. The results of the study are needed to plan economically effective operation of TATNEFT Company in the short term. The paper describes processes taking place in a reservoir when different chemical agents have been injected. Positive and negative factors affecting the efficiency of technologies are described; results of different technologies in the same initial conditions are evaluated. The authors analyze the performance of different EOR technologies in the same area and in the same well.

This work is devoted to hydrocarbon fields classification based on the complexity of theirs development. The method proposed takes into account geography and climate of the field, heterogeneity, rock properties, PVT properties, depositional environment and also – state interest in development of that type of fields. The classification directs to use of highly effective methods of field development and to ensure rofitability of new frontiers today and ahead.

The article describes a conceptual scheme of the integrated system for «oil dehydration – reservoir pressure maintenance – waste water disposal». A series of oilfields belonging to Samaraneftgaz were studied with regard to the structure of deep intake horizons, their reservoir and intake properties, regional seals, and compatibility of injected water, intake horizon water and reservoir rocks. The presented examples demonstrate the ranking of examined intake horizons based on their stratigraphical, geological, physical, hydrodynamic and chemical properties collection, which helps to select proper reservoir zones for the waste water disposal.

Bobrikov pool of Novo-Suksinskoye oil field has complex geological structure and unique characteristics: presence of all three formations C1br13, C1br12, C1br11 and at the same time insignificant compartmentalization due to junction and high oil-bearing thickness. These factors are favourable for construction of horizontal and multilateral horizontal wells. Efficiency analysis showed that drilling of multilateral horizontal wells on the field is effective if horizontal section of the wellbore passes through the most permeable part of the formation at the distance of at least 5-10 meters from oil-water contact.

The recommendations for the wells grid density optimization in the late stage of field development, taking into account the residual reserves and active wells, are given. The most effective measures for the residual reserves recovery are considered. Examples of their successful application are given.

The model of oil displacement by gel-forming systems is presented. Influence of reservoir properties on time of reservoir exploitation and oil recovery is analyzed on numerical examples.

On an example of oil of the Verhnechonsky oilfield deposit formation in a range of temperatures of a stream of oil 50-10 °С and temperatures of deposit formation surfaces -30 … +30 °С is studied. For formation prevention of asphalt-resinparaffin deposit it is tested industrially let out 10 additives of depressor and inhibitor type. It is shown that efficiency of inhibitor additives depends on oil temperature. The maximum inhibitor and depressor effect in the field of negative temperatures of oil is reached with addition of an additive by SIM-DP.

The new technology of water isolation by the elastic mass is suggested. And this mass has the high adhesion to layer rock, heat endurance and the selective characteristic which is got under interaction of wastes of the light oil products purification and calcium naphthenes with salt solution of the chloric calcium.

The article covers the statistical evaluation method of efficiency of geological and technical actions (well interventions) in producing well stock, based on their hydrodynamic interactions. The analysis of increasing the rate of fluid sampling from wells of Mykhpaiskaya area, Samotlor oilfield, has been completed. Based on small sample theory the hypotheses was tested with respect to the statistical significance of mean well flow rates difference prior to geological and technical actions and following them.

Questions of approximation of the fact sheet received at hydrodynamic researches of extracting wells, their further processing by a method of the determined moments of pressure are considered. It is shown that at carrying out of the given procedure it is expedient to use logarithmic dependences.

Considered are traditional acid compositions for the wells operation intensification. The studies of reagent Himeko-TK-2-K, developed by the experts of Himeko-GANG ZAO, are executed. The high effectiveness of this composition at the treatment of high-temperature low-permeable carbonate reservoirs and terrigenous reservoirs with high carbonate content is shown.

It is shown, that for the study of gas-lift wells it is sufficient to construct the relationship between flow rate and working substance flow rate or between the pressure and working substance flow rate. An approach to the transition from the first dependence to the second one at conservation of the method of study results processing is suggested.

The dynamics of oil recovery as a fraction of initial recoverable reserves is considered. The maximum rate of oil withdrawal from 98 oil fields of Russia and CIS countries are given. It is shown that with increasing the time of achieving the project level the maximum rate of recovery decreases, while the time of its achievement depends on the rate of wells putting into operation and it is controlled indicator. It is noted that the early achievement of the maximum rate of withdrawal reduces the main period of field development.

The dynamics of down time of well repair work teams, caused by the failures of pulling units, is given. The results of reliability studies of the basic components of pulling units AR32/40M are presented. The parameters and the laws of distributions of mean-time-between-failures of the inspected pulling units components are determined.

This article presents results of research and experience in application of surface-active RDN-U reagent in technological killing fluids for the purpose of reduction of negative influence of traditional killing fluids on a water and salt-water basis.

Influence of hydrochloric acid corrosion inhibitors on stability of acid-oil emulsion and speed of corrosion attack, including at the heightened temperature is investigated. It is established, that the nature of inhibitor, used for protection of the metal equipment against acid corrosion, significantly influences on stability of acid-oil emulsion formed at the contact of acid and oil. Inhibitor «Soling», specially developed for oil and gas industry, efficiently protects the metal
equipment from acid corrosion, including at high temperatures, reduces interfacial tension on the boundary acid – oil, and destroys acid-oil emulsion.