scholarly journals METASOMATIC CHANGES IN ROCKS OF SEDIMENTARY COMPLEXES IN THE CARPATHIAN OIL AND GAS PROVINCE AS AN INDICATOR OF CARBOHYDRATE MIGRATION

2021 ◽  
Vol 2 (11(75)) ◽  
pp. 15-24
Author(s):  
O. Cheremisska ◽  
G. Petruniak ◽  
Yu. Cheremissky ◽  
M. Petruniak
Keyword(s):  
Laboratory Investigation ◽  
Oil And Gas ◽  
Sedimentary Rocks ◽  
Consistent Pattern ◽  
Metasomatic Process ◽  
Geochemical Model ◽  
Rock Formation ◽  
Oil Deposits ◽  
Mineral Aggregates

A field and laboratory investigation of sedimentary rocks in Carpathian oil and gas province was curried out. The theoretical and practical aspects of the peculiarities of the development of metasomatic process during the migration of fluids at the postsedimentation stage of rock formation were investigated. Based on detailed field researches, a consistent pattern of mineral aggregates’ and their crystalloid individuals developing was defined. The arguments for developing a new geochemical model of oil deposits indication in Carpathian oil and gas province were provided.

Application of geochemical model for monitoring the superviscous oil deposits development by the thermal steam methods

2017 ◽  
pp. 104-107 ◽  
Author(s):  
A.E. Chemodanov ◽  
◽  
V.A. Sudakov ◽  
S.A. Usmanov ◽  
R.K Khairtdinov ◽  
...  
Keyword(s):  
Geochemical Model ◽  
Oil Deposits

Deep fluids and their role in hydrocarbon migration and oil deposit formation exemplified by supercritical СO2

2021 ◽  
pp. 1-11
Author(s):  
Sara LIFSHITS
Keyword(s):  
Supercritical Fluid ◽  
Oil And Gas ◽  
Gas Permeability ◽  
Sedimentary Rocks ◽  
Source Rocks ◽  
Reservoir Properties ◽  
Hydrocarbon Migration ◽  
Geological Processes ◽  
Before And After ◽  
Oil Source

ABSTRACT Hydrocarbon migration mechanism into a reservoir is one of the most controversial in oil and gas geology. The research aimed to study the effect of supercritical carbon dioxide (СО2) on the permeability of sedimentary rocks (carbonates, argillite, oil shale), which was assessed by the yield of chloroform extracts and gas permeability (carbonate, argillite) before and after the treatment of rocks with supercritical СО2. An increase in the permeability of dense potentially oil-source rocks has been noted, which is explained by the dissolution of carbonates to bicarbonates due to the high chemical activity of supercritical СО2 and water dissolved in it. Similarly, in geological processes, the introduction of deep supercritical fluid into sedimentary rocks can increase the permeability and, possibly, the porosity of rocks, which will facilitate the primary migration of hydrocarbons and improve the reservoir properties of the rocks. The considered mechanism of hydrocarbon migration in the flow of deep supercritical fluid makes it possible to revise the time and duration of the formation of gas–oil deposits decreasingly, as well as to explain features in the formation of various sources of hydrocarbons and observed inflow of oil into operating and exhausted wells.

scholarly journals Features of the geological structure, tectonic development and oil and gas potential of the Chezhen depression (Bohai bay basin)

2021 ◽  
Vol 63 (5) ◽  
pp. 8-16
Author(s):  
Sh. Qiu ◽  
N. A. Kasyanova
Keyword(s):  
Large Scale ◽  
Oil And Gas ◽  
Geological Structure ◽  
Fault System ◽  
Bohai Bay ◽  
Industrial Oil ◽  
Tectonic Development ◽  
Geophysical Information ◽  
Oil Deposits ◽  
Gas Potential

Background. In terms of oil and gas, the territory of the Chezhen depression has been studied insufficiently compared to the neighbouring same-range depressions. These depressions complicate the first-order Jiyang depression, geographically coinciding with the largest Shengli hydrocarbon field. In recent years, much geological and geophysical information about the oil geologyof the Chezhen depression has been accumulated, which allows its prospecting oil and gas potential to be assessed.Aim. To reveal regular features of the geological structure and location of oil deposits in the Chezhen depression in order to support the prospecting and exploration work within the Chezhen block of the Shengli field.Materials and methods. A comprehensive analysis of literature data and collected materials was conducted. A historical and geodynamic study of the evolution of the studied area according to literature data was carried out, along with an analysis of the most recent geological and geophysical information and exploration data based on the materials of the “Shengli AKOO Sinopek” oil company. The analysis was based on the data from 52 drilling wells and the results of seismic surveys performed in the central part of the Chezhen depression.Results. Specific features of the block geological structure of the area under study were established, which formed under the repeated influence of large-scale horizontal tectonic movements occurring at different periods of geological history. The role of the most recent fault system in the modern spatial distribution of oil deposits was determined.Conclusions. Our studies demonstrate a great prospecting potential of the Chezhen depression territory, where the discovery of new industrial oil deposits can be expected.

Oil-Bearing Capacity of the Great Depths of the East of the Caspian Depression and the Conditions for the Formation of Oil and Gas Accumulations

2019 ◽  
Vol 16 (11) ◽  
pp. 4491-4501
Author(s):  
O. S. Obryadchikov ◽  
K. M. Taskinbaev
Keyword(s):  
Oil And Gas ◽  
Deep Structure ◽  
Lower Permian ◽  
Vertical Flow ◽  
Carbonate Sediments ◽  
Geological Exploration ◽  
Eastern Area ◽  
Caspian Depression ◽  
Oil Deposits ◽  
Carbonate Complexes

The features of the deep structure of the eastern part of the Caspian depression, the patterns of placement of large carbonate complexes, which are associated with the main accumulations of oil and gas, are considered. The discovery of industrial accumulation of oil in the Lower Permian terrigenous sediments on the Akzhar Eastern area showed the possibility of carbonaceous carbonate deposits of carbon to be the object of prospecting and exploration. Oil deposits in the supersalt complex of sediments on the structures of Karatube South and Saigak are assumed to be formed due to the vertical flow from subsalt clay-carbonate sediments, which also allows us to count on the expansion of prospecting works and to focus on the east of the Caspian depression a new direction geological exploration (DGE).

scholarly journals TO THE QUESTION ABOUT DEEP OIL OF THE SOUTH TORGAY BASIN

Neft i gaz ◽  
2020 ◽  
Vol 5 (119) ◽  
pp. 70-83
Author(s):  
О.S. TURKOV ◽  
Keyword(s):  
21St Century ◽  
Oil And Gas ◽  
The South ◽  
High Quality ◽  
Oil And Gas Fields ◽  
Oil Deposits ◽  
Gas Fields

South Torgai basin is located in the south of and is the youngest oil and gas region discovered in Kazakhstan at the end of the last century. Shallow depths of reservoirs containing high-quality sulfurless oil are the main incentive for a return in the search for new deposits in the basin They are carried out according to the method developed on the basis of the hypothesis of the sedimentary genesis of oil. New data on the structure of the basin and its productivity obtained already at the beginning of the 21st century indicate that deep oil deposits are also found in the basin, which significantly increases the prospects for the discovery of new deposits and oil and gas fields in the region

scholarly journals REFINEMENT OF THE INTERVAL WITH ABRUPT CATAGENETICAL ALTERATIONS OF THE SEDIMENTARY ROCKS IN SOME OIL AND GAS FIELDS IN DDB

2018 ◽  
pp. 29-35
Author(s):  
O. Karpenko ◽  
O. Tunik
Keyword(s):  
Oil And Gas ◽  
Sedimentary Rocks ◽  
Microscopy Study ◽  
Great Depth ◽  
Donets Basin ◽  
Integrated Analysis ◽  
Oil And Gas Fields ◽  
Geological Information ◽  
New Research ◽  
Physical And Chemical

The article elaborates on the topic about abrupt catagenetical alterations in sedimentary rocks and postulates the topicality and problematics of the study during exploration of new and already existing oil and gas deposits. The goal of the research is the identification of compacted zone which was formed under secondary physical and chemical processes within 110–120 temperature interval (including possible paleotemperature effect). To get the most qualitative/comprehensive results, integrated analysis of lithology, petrophysical characteristics of cored intervals in the slide sections and geological information has been done by the authors. Essential part of the article is devoted to the methodology, study description and interpretation of outcome results. Four gas condensate fields were chosen based on their similarity. They have similar tectonic, structural, generation and accumulation conditions and all of them are located in the axial and pre-axial zone of the central part of Dnieper-Donets basin. After well log data processing and precise microscopy study of slide sections, the authors concluded that 110–120 temperature surfaces, which frame compacted and altered zone (identified by the Ukrainian Research Institute of Gas), have to be shifted according to new research findings. Practical value of this work is to identify compacted and decompacted zones at a great depth, which can be an indirect indicator of traps existence for hydrocarbons and possible manifestations of abnormal pressures.

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