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At the facilities of the oil and gas industry, underground water intakes are used for drinking, household, fire-fighting water supply, as well as for providing reservoir pressure maintenance systems, especially in the conditions of the Far North, when the use of surface water sources is difficult. According to statistical data, over the 10 years of operation, the flow rate decreases several times as a result of physical, chemical and biological colmatage. To solve this problem, a technology of high-pressure wave intensification of well flow rates in depression conditions has been developed, which ensures the removal of the products of aquifer dissociation at the wellhead, sparing cleaning of the filter zone, the sump and the entire wellbore. From the point of view of ensuring energy efficiency, the technology of low-pressure wave intensification of well flows, for shallow wells, is proposed due to the realized developed cavitation outflow and its accompanying secondary effects. When performing the work, probabilistic and statistical methods of processing the initial field information and experimental methods for studying the effect of vibration with different amplitude-frequency characteristics on rocks were used. Numerical simulation of turbulent submerged jets was performed using the STAR-CCM+ software package (CFD modeling). The optimal design parameters of axisymmetric cavitation generators of various designs were determined. The results provide satisfactory convergence with the experimental data. The novelty and uniqueness of the developed technological solutions is confirmed by the patents of the Russian Federation for inventions. Practical testing was carried out on more than 500 wells for drinking, economic and fire-fighting purposes in the Krasnodar, Stavropol and Perm territories, Rostov, Astrakhan, Saratov regions, Khanty-Mansiysk Yamalo-Nenets autonomous districts, and other regions of the Russian Federation. The success rate of treatments exceeds 95%, the minimum increase in the flow rate after treatments is 30-50%, the maximum recorded is 7800%. The effect is long-term.
Russia's Gazprom Neft together with France's SNF and its Russian subsidiary, SNF Vostok, have signed a partnership agreement to develop a new market for Chemical Enhanced Oil Recovery (CEOR) technologies and products for the Russian oil industry. SNF, the world's largest producer of polyacrylamide (the water-soluble polymer used in CEOR), signed the agreement in January with Gazprom Neft Technology Partnerships, previously known as the Bazhenov Technology Center. Although CEOR is embraced globally to boost production in aging fields, Russia's industry has generally snubbed the technology, largely because of the high cost of importing foreign polymers and the lack of any cheaper, Russian-manufactured, alternatives. This resistance has affected SNF's efforts to expand its Russian presence despite the market's obvious potential. SNF broke ground in 2016 to build a plant to manufacture chemicals used in CEOR in Saratov, located 720 km southeast of Moscow.
Astarkin, S. V. (KogalymNIPIneft Branch of LUKOIL-Engineering LLC in Tyumen, RF, Tyumen) | Goncharenko, O. P. (National Research Saratov State University, RF, Saratov) | Pisarenko, Yu. A. (Lower Volga Scientific Research Institute of Geology and Geophysics, RF, Saratov) | Morozov, V. P. (Kazan (Volga Region) Federal University, RF, Kazan)
The pdf file of this paper is in Russian. The Bobrikovskian horizon within the junction zone of the Ryazan-Saratov trough and the Zhiguli-Pugachev swell is peculiar for extreme variations of its thicknesses and stratigraphic completeness of the section. This is accounted for by the Early Visean regressions and transgressions. Diverse facies conditions used to contribute to formation of non-anticlinal (stratigraphic and lithologic) oil and gas traps currently associated with the major prospects for hydrocarbon exploration. Therefore, investigations aimed at specifying the structure of the Bobrikovskian horizon and reconstructing the settings of its formation is highly topical. The major aim of the study consisted in typifying the sections from the Bobrikovskian producing horizon within the junction zone of the Ryazan-Saratov trough and the Zhiguli-Pugachev swell. Analyses of the well log data and thorough lithological examination of the core material fromboth, the earlier described and the newly drilled wells have resulted in recognizing three principal sect ion types in the Bobrikovskian horizon and in revealing their areal distribution regularities. Variations in distribution of the effective thicknesses, reservoir-rock porosity and permeability are accounted for by the rocks lithologic changeability both, along the well section and over the area, as well as by sedimentation settings in the paleobasin. Section typifying complies with the paleostructural plan of the area and is largely related to the paleogeomorphological features of the basin structure and of the sediment accumulation. Analysis of the peculiarities in the examined section types -facies sedimentation settings - has made it possible to recognize the section intervals most promising in terms of searching for HC deposits. Sections of the second type are regarded as prospective ones; those may be associated with both, deposits of anticlinal type and traps of non-anticlinal type. The latter ones may occur in the regional zones of layer pinch-outs in the trough walls.