The paper considers the issue of increasing the reliability of the borehole telemetry information. The issue is suggested to be solved by applying the code of nonpositional residue number system instead of a traditionally used positional number notation to code the information. The residue number system is shown to have the best error-correcting capacities and is able both to detect the errors and correct them.Key words: oil wells; telemetry information, coding, residue number system, error-correcting capacities, error detection, error correction.Brief outline:
1)Reception and processing of telemetry information from the oil wells equipped with bottom-hole pumps are connected with low reliability of the wireless transmitted signals;2) Actual information coding methods based on a traditional positional number notation can not completely correct the errors occurred during digital processing of the signals;3) The nonpositional residue number system has better potential both to detect and to correct the errors.
4)The application of the residue number system increases the reliability of the telemetry information transmission from the oil wells equipped with the bottom-hole pumps.The transmission of the telemetry borehole information to the surface is one of the most crucial questions in carrying out the hydrodynamic analysis of the oil wells equipped with the bottom-hole pumps.
An analysis was made of the development of sections of the D3ps formation of the Devonian terrigenous sequence of the Shkapovsky field, with a share of contact zones of more than 78%, which showed that the exploitation of deposits by vertical and deviated wells is unprofitable. Studies show that the development of reserves at the facility occurs along highly permeable interlayers located in the plantar. The construction of sectoral geological and hydrodynamic models showed a detailed distribution of residual oil reserves by area and section in areas with low production values.
When analyzing the parameters of the operation of wells with horizontal completion, it was found that the selection of mobile oil reserves localized in a volume limited by the plane of the initial oil-water contact and the surface formed by the rise of the oil-water contact when pulling the water cone to the wells with horizontal completion is comparable with the period of reaching a water cut of 95%. The volumetric method was used to calculate the moving oil reserves in the area of water cone formation. It is recommended to drill wells with horizontal completion as an effective method of additional production of residual oil reserves in fields with similar geological and physical conditions.
The article studies geological and technological parameters’ impact on degree and nature of production wells. The wells influence the water injection into wells in the carbonate reservoirs of the Tournaisian stage of the Birsk saddle. The study presents an algorithm with substantiating technological solutions to increase the efficiency of developing low-productive deposits via internal flooding. It also considers the development of facilities for hard-to-recover reserves with high production costs and low profitability. This is made in order to use the resource base of the Volga-Ural oil and gas provinces more efficiently.
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