scholarly journals Digital core modeling technology for determining the reservoir-capacitive properties of terrigenous reservoirs

2021 ◽  
Vol 1201 (1) ◽  
pp. 012065
Author(s):  
M G Gubaidullin ◽  
I P Belozerov
Keyword(s):  
Core Model ◽  
Core Material ◽  
Reservoir Rocks ◽  
Modeling Technology ◽  
Terrigenous Rocks ◽  
Physical Experiments ◽  
Capacitive Properties ◽  
Digital Core ◽  
Hydrocarbon Fields

Abstract For today digital core modelling technology is demanded and developing instrument in conducting the main reservoir-capacitive properties of terrigenous rocks. This technology is becoming more widespread in connection with the development of computer and nanotechnologies. The main attempts to apply the digital core model in practice have been undertaken in the last decade, although the first examples of its use for the analysis of reservoir rocks date back to the 80s of the last century. Improvement of digital core modeling technology will allow to cope with the problem of lack or absence of core material, as well as to solve the problems of studying loose, weakly cemented and other rocks, "problematic" of conducting physical experiments. In addition, it seems relevant to create a digital core block that fits into the general digitalization platform of technologies related to reservoir-capacitive properties in the development of hydrocarbon fields. With the use of a digital core model, it also becomes possible to effectively refine and supplement the calculated parameters in laboratory core studies, reducing the likelihood of errors in the obtained results.

scholarly journals Analysis of the core microstructure of terrigenic reservoirs based on lithological-petrographic studies to support the creation of digital core model

2020 ◽  
Vol 20 (1) ◽  
pp. 37-42
Author(s):  
IP Belozerov ◽  
MG Gubaidullin ◽  
AV Yuriev
Keyword(s):  
Pore Space ◽  
Core Model ◽  
Core Material ◽  
Berea Sandstone ◽  
Reservoir Properties ◽  
Thin Sections ◽  
Digital Core ◽  
Northern Russia ◽  
Lithological Composition ◽  
Correct Understanding

The question of digital core modelling appears highly relevant due to the fact that there is not always a sufficient amount of core material available from studied wells: in some cases, it is not possible to select core material (in case of loose, weakly cemented rocks); in others, such material may be completely absent. In order to create a computer model of a digital core, it is necessary to have a correct understanding of the pore space microstructure and rock lithological composition and structure, among the most important features determining the quality of sedimentary reservoir rocks. Such information can be obtained by carrying out lithological-petrographic studies of thin sections of reference (standard) core samples. The aim of the present work is to study petrographic thin sections for their further use in creating a digital core model. The article discusses the methodology and results of laboratory lithological and petrographic studies of thin sections using the available core information. The paper presents the results of laboratory studies of thin sections of terrigenous sandstones obtained from the Berea Sandstone formation (USA). The choice of the Berea Sandstone is due to its wide recognition by specialists, as well as its homogeneity, both in terms of the grain size of constituent rocks and their filtration and reservoir properties. The work also presents the results of data analysis on lithological and petrographic studies of core material from the terrigenous deposits obtained in the Timan-Pechora province in northern Russia. The research results can be used for mathematical modelling of the pore space microstructure in a digital core model.

Evaluation of filtration-capacitive properties of complex reservoir rocks using the results of core microtomography

2019 ◽  
pp. 86-88
Author(s):  
S.R. Bembel ◽  
◽  
V.M. Aleksandrov ◽  
A.A. Ponomarev ◽  
P.V. Markov ◽  
...  
Keyword(s):  
Reservoir Rocks ◽  
Capacitive Properties

scholarly journals Numerical modelling of fluid transportation based on digital core model

2019 ◽  
Vol 1324 ◽  
pp. 012078
Author(s):  
Jianjun Liu ◽  
Rui Wang ◽  
Bohu Zhang ◽  
Lin Zu ◽  
Xiang He
Keyword(s):  
Numerical Modelling ◽  
Core Model ◽  
Digital Core

scholarly journals An Improved Method for Reconstructing the Digital Core Model of Heterogeneous Porous Media

2017 ◽  
Vol 121 (2) ◽  
pp. 389-406 ◽  
Author(s):  
Lili Ji ◽  
Mian Lin ◽  
Wenbin Jiang ◽  
Chenjie Wu
Keyword(s):  
Porous Media ◽  
Heterogeneous Porous Media ◽  
Core Model ◽  
Improved Method ◽  
Digital Core

scholarly journals Experimental determination of porosity and permeability properties of terrigenous reservoirs for creation and validation of a digital core model

2018 ◽  
Vol 18 (4) ◽  
pp. 141-147 ◽  
Author(s):  
Ivan Belozerov
Keyword(s):  
Pore Space ◽  
Experimental Studies ◽  
Core Model ◽  
High Porosity ◽  
Thin Sections ◽  
Additional Tool ◽  
Digital Core ◽  
Reservoir Conditions ◽  
Porosity And Permeability ◽  
Original Oil In Place

Digital core modelling is a vital task assessing original-oil-in-place. This technology can be seen as an additional tool for physical experiments capable of providing fast and efficient modelling of porous media. The objective of the paper is to determine experimentally the porosity and permeability properties of rocks and justify the possibility of using them for digital core modelling. The paper also validates feasibility of using the results of lithologic and petrographic surveys of thin sections in digital core modelling. The experimental studies of reservoir conditions allowed us to obtain curves of the dependence between the kerosene permeability of the terrigenous reservoir of the Buff Berea field and the temperature and to determine its main porosity and permeability properties. The paper also validates feasibility of applying the results of lithologic and petrographic surveys of thin sections of the reservoir to form the structure of the pore space of a digital core model by machine learning. The choice of this reservoir stems from the fact that the terrigenous sandstones of Berea Sandstone (USA) are characterised by minimal anisotropy of porosity and permeability properties, relatively high porosity and permeability, as well as uniformly sized grains of the composing rocks and good sorting. Oil industry experts therefore consider samples of these rocks to be most suitable for conducting applied research and testing various technologies. The results obtained were used to select the parameters required for modelling filtration flows in a digital model of the core.

scholarly journals Prediction of filtration and capacitive properties and oil saturation characteristics of complex structure carbonate reservoirs (on the example of the Northwestern part of DDB)

2020 ◽  
pp. 78-87
Author(s):  
O. V. Oliinyk ◽  
S. A. Vyzhva ◽  
V. V. Antoniuk ◽  
I. M. Bezrodna
Keyword(s):  
Gamma Ray ◽  
Complex Structure ◽  
Well Logging ◽  
Carbonate Reservoir ◽  
Donets Basin ◽  
Northwestern Part ◽  
Oil Saturation ◽  
Reservoir Rocks ◽  
Capacitive Properties ◽  
Carbonate Deposits

The world achievements of the study of carbonate reservoir rocks with secondary voids have been analyzed. An integrated approach to the study of this type of reservoir has been demonstrated on the example of reservoir rocks of the Visean strata of the South-Berestivske field in the North-Western part of the Dnipro-Donets Basin. The purpose of this article is to predict the reservoir filtration-capacitive properties, as well as oil saturation characte-ristics of complex carbonate reservoir rocks using well logging data. To solve this problem, an integrat-ed approach is used. It includes the methods of porosities balance and functional transformations (normalization) of the electrical and radioactive well logging curves (lateral logging - neutron gamma ray logging, impulse neu-tron-neutron logging - neutron gamma ray logging). As a result, the authors have identified intervals in the Visean carbonate deposits with cavernous voids and cracks. Each individual geophysical method is influenced by the structure of the void space. Due to this, when calculating the porosity coefficient for different probes, the au-thors identify intervals represented by carbonate deposits, mainly of the porous-cavernous type. However, there is an interval of 4287.6-4289.6 m of porous-cavernous-fractured type. It is established that in the selected layers the coefficients of different types of porosity are: secondary - 2.5-6%, cavernous - 1.7-5% and fracture -0.2%. The thickness of pro-ductive sediments varies within 0.8 - 2.4 m (the average value is 2 m). The authors also substantiated the choice of parameters when calculating the saturation coefficient in complex structural reservoirs. Moreover, it is noted that the reservoir properties are provided by the presence of secondary voids, namely the cavities through which the fluid is filtered, and the rock matrix is compacted, poor-porous and low-permeable.

Silurian carbonate reservoir rocks of the joint zone of the Khoreyver depression and the Chernyshev ridge

2021 ◽  
Vol 3 ◽  
pp. 41-48
Author(s):  
I.I. Danshchikova ◽  
◽  
T.V. Maidl ◽  
A.V. Zhuravlev ◽  
V.S. Nikiforova ◽  
...  
Keyword(s):  
Carbonate Reservoir ◽  
Void Space ◽  
Reservoir Rocks ◽  
Lower Silurian ◽  
Coastal Marine ◽  
First Case ◽  
Capacitive Properties ◽  
Chernyshev Ridge ◽  
Filtration Properties ◽  
Hydrocarbon Deposits

The paper presents a comprehensive study of low-capacity Silurian carbonate reservoir rocks in the northeastern regions of the Timan-Pechora province. Silurian deposits in the sections of the Khosedayu swell, the Talbey block, and the Makarikha-Salyukin anticlinal zone are mainly secondary dolomites and, to a lesser extent, limestones, as well as with low-power interlayers of agrillites, clay dolomites, dolomite-anhydrite rocks. The deposits were formed in coastal-marine and shallow-marine conditions. As a result of the conducted studies, it was noted that dolomites with a shadow biohermal structure have the best filtration properties in the Lower Silurian, and bioclastic limestones – in the Upper Silurian. The reservoir rocks of the Talbey block of the Chernyshev ridge have the best filtration-capacitive properties. The main volume of the void space in the first case is associated with cavities and cracks, in the second one – with matrix porosity. However, the signs of modern karst in the salts of Malo-Tavrotinsky strata observed from the core indicate a possible reformation of the deposits, which requires more careful attention when predicting deposits. The results obtained can contribute to the design of a rational system for the development of hydrocarbon deposits.

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