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Date submitted2021-05-28
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Date accepted2021-11-30
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Date published2021-12-27
Features of grouping low-producing oil deposits in carbonate reservoirs for the rational use of resources within the Ural-Volga region
A methodology has been developed and a procedure for selecting homogeneous groups has been implemented using a set of parameters characterizing the properties of formation fluids, layering conditions, geological and physical properties of formations at different levels of the hierarchy. An algorithm for identifying deposits for monitoring and justifying measures to improve the efficiency of development management is proposed. A justification for the selection of associative groups of long-term developed objects using the parameters of geological heterogeneity according to different tectonic-stratigraphic elements is presented. To reduce the degree of uncertainty in the evaluation of objects by the degree and nature of geological heterogeneity, the parameters reflecting the degree of uncertainty of the system using complex characteristics are proposed. For different deposit associations, a different influence of the features of the object structure on the degree of their division has been established. In the process of deposit drilling, as additional information about development objects is obtained, it is necessary to specify the nature of the distinguished groups of objects first of all based on the use of characteristics of geological heterogeneity. Comparison of various grouping options shows the need to take into account the geological heterogeneity of objects during their drilling. The identification of groups of objects using a limited number of parameters is approximate, but at the stage of drafting the first design documents, it is possible to solve certain tasks aimed at determining the strategy for the development of deposits
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Date submitted2021-01-18
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Date accepted2021-05-21
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Date published2021-09-20
Improving the efficiency of the technology and organization of the longwall face move during the intensive flat-lying coal seams mining at the Kuzbass mines
The reasons for the lag of the indicators of the leading Russian coal mines engaged in the longwall mining of the flat-lying coal seams from similar foreign mines are considered. The analysis of the efficiency of the longwall face move operations at the JSC SUEK-Kuzbass mines was carried out. A significant excess of the planned deadlines for the longwall face move during the thick flat-lying seams mining, the reasons for the low efficiency of disassembling operations and the main directions for improving the technology of disassembling operations are revealed. The directions of ensuring the operational condition of the recovery room formed by the longwall face are considered. The recommended scheme of converged coal seams mining and a three-dimensional model of a rock mass to justify its parameters are presented. Numerical studies using the finite element method are performed. The results of modeling the stress-strain state of a rock mass in the vicinity of a recovery room formed under conditions of increased stresses from the boundary part of a previously mined overlying seam are shown. The main factors determining the possibility of ensuring the operational condition of the recovery rooms are established. It is shown that it is necessary to take into account the influence of the increased stresses zone when choosing timbering standards and organizing disassembling operations at a interbed thickness of 60 m or less. A sufficient distance from the gob of above- or undermined seams was determined to ensure the operational condition of the recovery room of 50 m, for the set-up room – 30 m. Recommendations are given for improving technology and organization of the longwall face move operations at the mines applied longwall mining of flat-lying coal seams with the formation of a recovery room by the longwall face.
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Date submitted2019-06-30
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Date accepted2019-09-10
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Date published2019-12-24
Industrial safety principles in coal mining
- Authors:
- E. N. Chemezov
The article provides a description of injuries in coal mining enterprises in Russia. The high injury rate causes the need of developing new effective ways and means of improving safety at mining enterprises. Recently in Russia there has been a tendency for a slight decrease in fatal injuries, which indicates some progress in prevention of industrial accidents. At the same time, the problem of improving the working conditions of coal miners, reducing the level of injuries and occupational diseases in this industry remains a very urgent task. Ensuring safe operation and industrial health and safety is not only reasonable economic policy but one of the constitutional human rights. At Russian coal mining enterprises, they take measures to reduce injuries, the supervisory authorities and employees of the enterprises carry out certain work to comply with safety requirements. However, significant success has not yet been achieved. Despite the fatal injuries and accidents, the issue of industrial mining safety is not becoming a top priority. Occupational safety measures are often financed on a «left-over» principle, and therefore remain not implemented. Many managers do not pay enough attention to safety issues and have little control over the planned activities in this area. The article analyzes the causes of injuries and proposes the key directions for creating normal working conditions in coal mining enterprises.
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Date submitted2016-09-06
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Date accepted2016-11-13
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Date published2017-02-22
Justified selection of a seam degassing technology to ensure safety of intensive coal mining
- Authors:
- S. V. Slastunov
- E. P. Yutyaev
The paper contains main aspects of methodological approach to objective analytic assessment of maximum permissible output of the mine faces from the viewpoint of gas factor. Analytic forecast is centered around the assessment of methane inflow into the face area from all possible sources, based on fundamental physical laws, modern tools of mathematical modeling and in-situ tests of main properties and state parameters of the gas-bearing coal formation. Objective and reliable estimation of permissible outputs is a starting point for justified selection of a seam degassing technology, that has to be based on time factor and predicted value of gas recovery from a coal seam to a degassing well. Recommendations have been formulated on the selection of degassing technology for the coal seam «Boldyrevsky» of the Kirov mine, based on the use of cutting-edge technological schemes (hydraulic fracture, carried out from development workings, etc.), successfully implemented on the mentioned site.
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Date submitted2015-08-17
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Date accepted2015-10-12
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Date published2016-04-22
Isolation of promising areas to drill for unconventional hydrocarbons petrikovskih sediments Davydovskogo deposit Pripyat Trough
- Authors:
- E.I. Shevelev
Pripyat Trough is the only oil basin in the territory of the Republic of Belarus. Mining is carried out within the basin for 50 years. During this time, the proportion of active stocks decreased significantly, while the share of hard-to-inventories increased. Therefore, due to the depletion of traditional reserves, urgent problem arises in the study and production of unconventional hydrocarbon traps. To this type of traps are Petrikov deposits Davydov field. These deposits have low permeability and capacitive properties, but at the same time in a number of wells in the test sediment in Colon yielded commercial oil inflows. Some of the well in a certain period of development led oil from Petrikov deposits. In similar deposits Rechitsa field yielded commercial oil inflows in drilling horizontal wells with hydraulic fracturing. Until recently, the reservoir Petrikov deposits was listed among the off-balance sheet reserves after drilling – reserves transferred to the balance of C1. Therefore, the input to the development of stranded there is a need to identify the most promising area for drilling horizontal wells, followed by hydraulic fracturing. To perform this work was carried out pointwise interpretation of GIS for all wells Davydov field, the results of which built the geological and petrophysical model of the deposit. Also, the analysis of core samples, the results of drilling. Produced dismemberment Petrikov deposits on two subhorizon on the results of the interpretation of GIS and well logs. The outcome of the work performed is a recommended site for drilling.
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Date submitted2014-11-01
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Date accepted2015-01-18
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Date published2015-10-26
On the design features of underground multiple gassy coal seam mining
- Authors:
- O. I. Kazanin
The analysis of the industry regulatory requirements and the world design experience of underground multiple coal seam mining is provided. The main problems of intensive longwall mining of multiple flat gassy coal seams as well as methods for determination of high rock pressure zone parameters and seams interaction are considered. The examples of a number of mines in the Kuzbass and Pechora coal basins show that the design of multiple seam mining and the choice of longwall panel parameters were often made without taking into consideration influence of surrounded seams that leads to essential complication of conditions for mining operations and decreases the technical and economic indicators of mining. The existing industry regulations do not allow considering complex influence of factors in multiple coal seams mining fully. On the basis of field, laboratory, and numeric research results it is noted that recommendations for pillar positioning in contiguous seams ensuring efficiency and safety of multiple seam longwall mining can significantly differ in case of liability of coal seams to spontaneous combustion, high natural gas content, influence of multiple seam mining onto daily surface, and difficult conditions of entries maintenance. The importance of having information on the stress-strain condition of the rock mass at a design stage and its changes in the process of multiple seam mining is shown. The need for industry regulations updating for the purpose of a more detailed definition of a form, size and a location of high rock pressure zones as well as stress parameters in these zones is noted. A set of recommendations for effective and safe multiple seam mining is developed.
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Date submitted2009-10-21
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Date accepted2009-12-16
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Date published2010-09-22
Geomechanical foundations of the safe extraction in joint mining of rich, coppery and ore patches in deep ore mines at Тalnakh
- Authors:
- V. A. Zvezdkin
- A. A. Andreev
The paper deals with the specific formation of stress fields in ore-bearing intrusions at the Oktiabrsky and Talnakh ore deposits with due account of depth of occurrence and formation of tectonic disturbances. The authors have investigated the influence of mining works on stress state of ore-bearing portion of the intrusion. The relationships were obtained in terms of the formation of stress fields in the intrusion during its undermining, overmining and joint mining of several ore deposits. Some recommendations are given for mining of series of ore formations at the Oktiabrsky and Talnakh deposits.
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Date submitted1958-03-05
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Date accepted1958-05-01
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Date published1958-05-09
ПЕТРОГРАФИЧЕСКАЯ ХАРАКТЕРИСТИКА ТРЕТИЧНЫХ БУРЫХ УГЛЕЙ БАБАЕВСКОГО И ДРУГИХ МЕСТОРОЖДЕНИЙ ЮГО-ЗАПАДНОГО ПРИУРАЛЬЯ
- Authors:
- Unknown
Малометаморфизованные бурые угли третичного возраста, широко распространенные в пределах правобережной Украины, юго-западного Приуралья и северного Казахстана с петрографической стороны исследованы недостаточно. До сих пор нет хорошо разработанной методики изучения малометаморфизованных рыхлых бурых углей, резко отличающихся от более плотных бурых и каменных углей, а также от торфов. В настоящей статье излагаются результаты комплексного (ботанического, петрографического и химического) изучения вещественного состава малометаморфизованных бурых углей, слагающих мощную залежь, Бабаевского месторождения и приводится сравнение их с углями других третичных месторождений юго-западного Приуралья. Вопросы происхождения малометаморфизованных бурых углей рассматриваются автором в специальной статье, подробная характеристика типов углей и строения угольных залежей отдельных месторождений Южно-уральского буроугольного бассейна излагается в подготавливаемом в настоящее время атласе.
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Date submitted1958-03-20
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Date accepted1958-05-14
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Date published1958-05-09
О ВЕРХНЕМ ПАЛЕОЗОЕ ЮЖНОЙ КАЛБЫ (ВОСТОЧНЫЙ КАЗАХСТАН)
- Authors:
- Unknown
В 1933 г. нами в пределах Калбинского хребта выделены, а в 1934—1935 гг. изучены более детально верхнепалеозойские отложения. В дальнейшем, вопросом о верхнем палеозое Калбы занимался ряд исследователей, общим недостатком работ которых было слабое знание особенностей верхнепалеозойских отложений на всей площади их распространения в Калбе. В результате в представлениях о последовательности верхнепалеозойских свит, соотношении этих свит и их палеонтологической и литологической характеристике возникла некоторая путаница.
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Date submitted1951-08-26
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Date accepted1951-10-03
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Date published1952-04-24
Physical and mechanical properties of clays of the coal-bearing suite of the Lower Carboniferous of the Moscow Basin
- Authors:
- V. D. Lomtadze
In the Moscow Basin, clay deposits occupy a significant part of the section of the sandy-clayey coal-bearing suite of the Lower Carboniferous. This suite is almost continuously distributed throughout the basin (Fig. 1). Throughout its length, it is characterized by the inconsistency of the section in the vertical and horizontal directions. Along the southern wing of the basin, the coal beds are thicker, while to the north, along the western wing, the coal content of the suite gradually decreases, and already in the section of the Tikhvin region only black carbonaceous clays and occasionally thin coal interlayers are observed. At the same time, the saturation of the section with refractory clays is significantly reduced here, the place of which is occupied by bauxite deposits and red sandy clays. The variability of the section of the coal-bearing suite is explained by the coastal-marine and coastal-continental conditions of its accumulation. The change in the structure of the coal-bearing suite along the strike is the result of the facies replacement of coal by carbonaceous clays, and then carbonaceous clays by red sandy clays. A. E. Ulmer believes that the southern part of the western wing and the southern wing of the Moscow Basin are included in the facies zone of accumulation of continental and coastal-marine sediments, and the northern part of the western wing is included in the facies zone characterized by the predominance of continental erosion over accumulation.