Marking of productive intervals in Bazhenov formation based on a limited set of well testing

2020 ◽  
pp. 51-64
Author(s):  
G. A. Smolyakov ◽  
V. F. Grishkevich ◽  
N. V. Gilmanova ◽  
D. A. Laminskii ◽  
A. V. Sivkova
Keyword(s):  
Geological Structure ◽  
Minimum Amount ◽  
Well Testing ◽  
Bazhenov Formation ◽  
The Core ◽  
Available Information ◽  
Sedimentation Processes

The article is devoted to features of the geological structure of Bazhenov formation. The rocks of Bazhenov formation were dissected according to the data of a limited complex of well testing. The presented method is based on qualitative signs of changes in the registered curves, which have a pronounced character of changing values comparable to changes in the spectrometric composition of rocks, paleontological characteristics, the facies situation of sedimentation and secondary post-sedimentation processes occurring in Bazhenov deposits. During the analysis and development of the algorithm, the basic marking horizons were identified, which took into account the main lithological and metamorphic features of the formation's deposits. The presented method of marking differs slightly from the usual lithotypisation of a well section. Its simplicity makes sense to use the minimum amount of available information with the possibility of selecting and testing the most productive intervals of the formation. Successfully conducted testing of algorithms works in two deposits of the different genesis of the sediments, the data obtained are compared are presented with the detailed lithological characteristics selected by the core and the tested wells.

scholarly journals Typification of the section of Bazhenov formation through the integration of geological, geochemical and geophysical data

2020 ◽  
pp. 56-66
Author(s):  
G. A. Smolyakov ◽  
V. F. Grishkevich ◽  
N. Yu. Moskalenko ◽  
N. V. Gilmanova
Keyword(s):  
Geological Structure ◽  
Geophysical Data ◽  
Spectral Studies ◽  
Well Testing ◽  
Well Performance ◽  
Specific Data ◽  
Bazhenov Formation

The article is devoted to features of the geological structure of Bazhenov formation. Gross spectral studies helped to study in detail the rocks composing the Bazhenov formation. In addition, specific data and publications characterizing paleontological and facies conditions of depositional basin sedimentation were considered. The results of the studies show only the organogenic nature of the origin of the lithological differences of Bazhenov deposits, confirm the need to change the algorithms for the interpretation of geophysical studies of wells. In the article, we reveal the regularities of changes in the recorded well values with the composition of rocks and their attachment to certain stratigraphic floors and the corresponding facies conditions. Also, we describe the concept of lithological dismemberment of Bazhenov formation by well testing and well performance.

COMPOSITION AND RESERVOIR PROPERTIES OF DEPOSITS OF THE BAZHENOV FORMATION IN THE CENTRAL PART OF TUNDRIN DEPRESSION

2018 ◽  
pp. 107-111
Author(s):  
O. M. Makarova ◽  
N. I. Korobova ◽  
A. G. Kalmykov ◽  
G. A. Kalmykov
Keyword(s):  
Reservoir Properties ◽  
Bazhenov Formation ◽  
The Core ◽  
Petrophysical Data ◽  
Pore Types

According to lithological and petrophysical data the core of the Bazhenov Formation, discovered in the central part of the Tundrin Basin, the structure of the section was characterized , productive oil intervals were identified, in which the collectors of pore and fissure-pore types are developed.

Historical text archives and prosopography: the COEL database system

1998 ◽  
Vol 10 (1-3) ◽  
pp. 57-72 ◽  
Author(s):  
K. S. B. Keats-Rohan
Keyword(s):  
Research Tool ◽  
Direct Access ◽  
Specific Situation ◽  
Core Data ◽  
Secondary Sources ◽  
The Core ◽  
Level 3 ◽  
Full Discussion ◽  
Available Information ◽  
Level 2

The COEL database and database software, a combined reference and research tool created by historians for historians, is presented here through Screenshots illustrating the underlying theoretical model and the specific situation to which that has been applied. The key emphases are upon data integrity, and the historian's role in interpreting and manipulating what is often contentious data. From a corpus of sources (Level 1) certain core data are extracted for separate treatment at an interpretive level (Level 3), based upon a master list of the core data (Level 2). The core data are interdependent: each record in Level 2 is of interest in itself; and it either could or should be associated with an(other) record(s) as a specific entity. Sometimes the sources are ambiguous and the association is contentious, necessitating a probabilty-coding approach. The entities created by the association process can then be treated at a commentary level, introducing material external to the database, whether primary or secondary sources. A full discussion of the difficulties is provided within a synthesis of available information on the core data. Direct access to the source texts is only ever a mouse click away. Fully query able, COEL is formidable look-up and research tool for users of all levels, who remain free to exercise an alternative judgement on the associations of the core data. In principle, there is no limit on the type of text or core data that could be handled in such a system.

Distribution of organic matter in Bazhenov high-carbon formation

2019 ◽  
pp. 46-56
Author(s):  
M. S. Topchii ◽  
N. V. Pronina ◽  
A. G. Kalmykov ◽  
G. A. Kalmykov ◽  
M. M. Fomina ◽  
...  
Keyword(s):  
Organic Matter ◽  
Geological Structure ◽  
Heterogeneous Structure ◽  
Carbon Formation ◽  
High Carbon ◽  
Mixed Composition ◽  
Shale Formations ◽  
Bazhenov Formation ◽  
Geological Features ◽  
Micro Level

One of the most famous and promising shale formations in Russia is the Bazhenov formation. The ambiguity of ideas about its geological features, caused by the complex, heterogeneous structure of the strata, attracts the attention of many researchers. In this work, the Bazhenov formation is singled out in conjunction with its stratigraphic counterparts in the Bazhenov high-carbon formation (BVCHF). In this were considered the main characteristics of its allotment and distribution over the area, as well as the geological structure. Being an unconventional reservoir of hydrocarbons, BVCHF has properties of a petroleum-bearing rock, one of the main characteristics of which is organic matter, its type and maturity. The paper presents the results of the study of organic matter by various methods at the micro level, as well as their integration with larger-scale studies. The need for detailed consideration of the organic matter of the BVCHF is justified by the fact that it has a mixed composition and, as a consequence, a different degree of transformation and spatial distribution.

Comprehensive study of the geological structure Verkhneyakovlev deposits of the Tagul field in the process of justifications for operational drilling

2021 ◽  
pp. 85-97
Author(s):  
A. S. Titenkov ◽  
Yu. N. Utyashev ◽  
A. A. Evdoshchuk ◽  
V. A. Belkina ◽  
D. V. Grandov
Keyword(s):  
Complex Structure ◽  
Geological Structure ◽  
Reservoir Rock ◽  
Rock Properties ◽  
Capital Costs ◽  
Complex Geological Structure ◽  
Well Correlation ◽  
Effective Development ◽  
The Cost ◽  
Available Information

Currently, most of the fields being put into development are characterized by a complex geological structure, both in terms of section and in terms of plan. The solution of all geological tasks, including such important ones as the preparation of exploration projects, operation and effective development management, is impossible without creating models that reflect the main features of the variability of target parameters. The construction of adequate models of objects with a complex structure requires the involvement of all available information. The accuracy of the geological model is mostly determined by the accuracy of the well correlation. Paleosols are a new marker for the complex-built layers of the VAk-2 and VAk-3(1) of the Tagul field, which contributes to the validity of the correlation of the section of these layers. The reliability of the model was also improved by the use of the results of facies analysis. This analysis showed that the sedimentation of the studied objects includes channel and floodplain facies. Reservoir rock properties of these facies differ significantly. The updated model is characterized by a reduction in the oil-bearing area and the amount of reserves. The implementation of the model will optimize the project fund of wells and reduce the cost of well intervention. Economically, this means reducing capital costs and increasing the profitability of the project.

scholarly journals Section types and oil prospects of the Bazhenov Formation in the Nadym-Ob interfluve

Georesursy ◽  
2020 ◽  
Vol 22 (3) ◽  
pp. 2-11
Author(s):  
Mikhail A. Fomin ◽  
Rashid M. Saitov
Keyword(s):  
Cost Effective ◽  
Geological Structure ◽  
Void Space ◽  
Bazhenov Formation ◽  
Oil Reserves ◽  
Deep Wells ◽  
Wide Range ◽  
Oil Source ◽  
Lithological Composition ◽  
Nenets Autonomous

The article presents the results of studying the geological structure of the Bazhenov Formation in the Nadym-Ob interfluve of Western Siberia with the aim of predicting the oil content of this black shale stratum. As a result of interpretation of a wide range of well logging represented by electric, radioactive and acoustic logging, with subsequent matching of these results with paleontological definitions of micro- and macrofauna, the distribution of the Salym, Nizhnevartovsky and Tarkosalinsky types of sections of the Bazhenov Formation was clarified, transitional areas between them were identified. It has been established that the Tarkosalinsky type is more widespread in the western direction than was shown earlier and is also distinguished in the Vengayakhinskaya, Yaraynerskaya and other areas. The Nizhnevartovsky type, on the contrary, has a narrower distribution and stands out directly within the same name arc and to the south by the Variegasky-Tagrinsky megahigh. On the basis of geological, geochemical, geophysical criteria and the results of an inflow test in deep wells, a map of the oil potential prospects of the “classical” sections of the Bazhenov Formation has been compiled. Regional prerequisites (high catagenesis of organic matter, significant modern concentrations of organic carbon, etc.) for the discovery of industrial accumulations of oil in the Bazhenov Formation in the southern regions of the Yamalo-Nenets Autonomous Area are identified. The results of the test for the inflow of the Bazhenov Formation in this area in the 70–90s XX century were analyzed; repeated, interval testing of these deposits using modern methods of stimulation of the inflow is recommended. The necessity of laboratory lithological, petrophysical, geochemical study of the core of the Bazhenov Formation in the southern part of the Yamalo-Nenets Autonomous Area is substantiated with the aim of determining its lithological composition, identifying oil source and oil productive intervals, studying the reservoir structure and the nature of saturation of its void space, developing recommendations for calculating oil reserves and creating technology for its cost-effective production.

scholarly journals Checklist of gypsophilous vascular flora in Italy

PhytoKeys ◽  
2018 ◽  
Vol 103 ◽  
pp. 61-82 ◽  
Author(s):  
Carmelo Maria Musarella ◽  
Antonio Jesús Mendoza-Fernández ◽  
Juan Francisco Mota ◽  
Alessandro Alessandrini ◽  
Gianluigi Bacchetta ◽  
...  
Keyword(s):  
Plant Species ◽  
Plant Communities ◽  
Delphi Technique ◽  
Group Communication ◽  
Life Forms ◽  
Communication Process ◽  
Clear Preference ◽  
The Core ◽  
Narrow Endemics ◽  
Available Information

Our understanding of the richness and uniqueness of the flora growing on gypsum substrates in Italy has grown significantly since the 19th century and, even today, new plant species are still being discovered. However, the plants and plant communities, growing on gypsum substrates in Italy, are still a relatively unknown subject. The main aim of this paper was to elaborate a checklist of the Italian gypsophilous flora, to increase knowledge about this peculiar flora and for which conservation efforts need to be addressed. Through a structured group communication process of experts (application of the Delphi technique), a remarkable number of experienced Italian botanists have joined together to select focal plant species linked to gypsum substrates. From the results obtained, 31 plant species behave as absolute or preferent taxa (gypsophytes and gypsoclines) and form the ‘core’ Italian gypsophilous flora. The most abundant life forms were chamaephytes and hemicryptophytes, belonging to Poaceae and Brassicaceae; as for chorotypes, the most represented are Mediterranean and narrow endemics. By improving on previously available information about the flora with a clear preference for gypsum in Italy, this undertaking represents an important contribution to the knowledge of a habitat which is today considered a priority for conservation.

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