O. Burachok - Academia.edu (original) (raw)

Papers by O. Burachok

Research paper thumbnail of Hydrogen From Depleted/Depleting Hydrocarbon Reservoirs: is it Feasible?

The Fourth EAGE Global Energy Transition Conference and Exhibition

Research paper thumbnail of Challenges of Steady-State CO2 Injection Network Optimization Studies

The Fourth EAGE Global Energy Transition Conference and Exhibition

Research paper thumbnail of Geomechanical Analysis of Caprock Integrity and Fault Stability for Greensand CO2 Storage Project Feasibility

Day 2 Wed, September 06, 2023

A comprehensive geomechanical assessment is carried out to investigate the upper pressure limit o... more A comprehensive geomechanical assessment is carried out to investigate the upper pressure limit of CO2 injection for the depleted oil Frigg Sand reservoir in Nini field, offshore Denmark. The mechanical stability of the Frigg Sand reservoir, shale caprock and key intersecting faults were investigated under the forecasted CO2 injection plan using a field-scale coupled finite element model built for the target storage reservoir. The field-scale geomechanical model is built by preparing a 3D grid which covers the entire Greensand field structure including the basement and overburden up to the seabed. The geomechanical properties and parameters are constrained using the well-centric data and propagated in 3D grid using geostatistical approach combined with surface seismic data. A finite element model is prepared and coupled with the reservoir flow dynamic model for the interested zone of the studied area. The results of the finite element model are used to investigate the integrity of t...

Research paper thumbnail of Application of Digital Rocks Technology to Carbon Storage: Greensand Project Case Study

84th EAGE Annual Conference & Exhibition

Research paper thumbnail of CO2 Plume Geothermal (CPG) in Depleted Gas Reservoirs: Sensitivity Analysis on Key Parameters

84th EAGE Annual Conference & Exhibition

Research paper thumbnail of Engineering design of CO2 storage in saline aquifers and in depleted hydrocarbon reservoirs: similarities and differences

First Break

Abstract The types of geological structures suitable for CO2 storage are saline aquifers (SA) and... more Abstract The types of geological structures suitable for CO2 storage are saline aquifers (SA) and depleted hydrocarbon reservoirs (DHR). It is well-known that a direct comparison is often somewhat misleading; the preferences depend on many factors, including availability, logistical and economic concerns. However, advantages and disadvantages in terms of various engineering aspects are often compared. We summarize the state-of-the-art of knowledge on the use of SAs and DHRs. Physical processes involved, analytical and numerical approaches for capacity and injectivity estimations, containment, wellbore and near-wellbore challenges and logistical options are discussed for both options. Comparisons are made considering engineering design for the onshore and offshore cases together with the preliminary economics.

Research paper thumbnail of Numerical Assessment of Halite Precipitation Impact on Cyclic CO2 Injection into Saline Aquifers

Research paper thumbnail of Greensand Focused Seismic Monitoring for Offshore CO2 Pilot Injection

Research paper thumbnail of Integrated approach for geothermal reservoir studies : geology, fluid flow and geomechanics

Geothermal reservoirs are characterized by complex geological structures associated with faulted ... more Geothermal reservoirs are characterized by complex geological structures associated with faulted and fractured formations. Highly conductive fractures are the main flow channels and therefore, are the primary targets in well placement design. During the reservoir development, reinjection of cold water at high rates will not only change the stress field but could lead to undesired events like, fault reactivation and potential seismic activity. Coupling fluid flow and geomechanical simulators allows the assessment of potential impact of reservoir operation on the subsurface system, notably the change of flow direction and the closure and opening of fracture networks, affecting the performance of the system as a heat exchanger, and the occurrence of microseismic events due to the reactivation of faults, impacting public acceptance.

Research paper thumbnail of Functional Comparison of Wellbore-Reservoir Coupling Solutions for Co2 Storage Simulations

83rd EAGE Annual Conference & Exhibition

Research paper thumbnail of Gas-Condensate Fluid PVT Model Quality Check Based on the Concept of a Single-Cell Simulation Model

Bulletin of the National Technical University "KhPI". Series: Chemistry, Chemical Technology and Ecology, 2020

The problems of gas-condensate PVT-models (Pressure Volume Temperature, PVT) creation under limit... more The problems of gas-condensate PVT-models (Pressure Volume Temperature, PVT) creation under limited input information were analyzed. Traditional fluid phase behavior characterization approach relies on creation of the equation of state (EOS) based on initial composition of reservoir fluid and its future regression for critical parameters (pressure and temperature), binary interaction coefficients, acentric factors of residual “plus” fraction or pseudo-components. The adjustment is done until the moment when EOS is reproducing the results of laboratory experiments. Classic PVT experiments performed on gas-condensates and volatile oils are constant composition expansion (CCE), constant volume depletion (CVD) and separator tests. However, in the case of most Ukrainian fields, discovered and explored in the last century, not only the reliable detailed initial fluid composition is not available, but phase behavior was studied with non-equilibrium method of so-called differential condensa...

Research paper thumbnail of Gas-Condensate Fluid PVT Model Quality Check Based on the Concept of a Single-Cell Simulation Model

Bulletin of the National Technical University "KhPI". Series: Chemistry, Chemical Technology and Ecology, 2020

The problems of gas-condensate PVT-models (Pressure Volume Temperature, PVT) creation under limit... more The problems of gas-condensate PVT-models (Pressure Volume Temperature, PVT) creation under limited input information were analyzed. Traditional fluid phase behavior characterization approach relies on creation of the equation of state (EOS) based on initial composition of reservoir fluid and its future regression for critical parameters (pressure and temperature), binary interaction coefficients, acentric factors of residual “plus” fraction or pseudo-components. The adjustment is done until the moment when EOS is reproducing the results of laboratory experiments. Classic PVT experiments performed on gas-condensates and volatile oils are constant composition expansion (CCE), constant volume depletion (CVD) and separator tests. However, in the case of most Ukrainian fields, discovered and explored in the last century, not only the reliable detailed initial fluid composition is not available, but phase behavior was studied with non-equilibrium method of so-called differential condensa...

Research paper thumbnail of Increasing the degree of hydrocarbon recovery factor from the water-flooded Hadiach oil and gas condensate field by injection of carbon dioxide

Prospecting and Development of Oil and Gas Fields

To investigate the effectiveness of technologies for the secondary production of hydrocarbons by ... more To investigate the effectiveness of technologies for the secondary production of hydrocarbons by injecting non-hydrocarbon gases into productive reservoirs, a study has been carried out using the Schlumberger’s prime hydrodynamic simulation tools –Eclipse and Petrel. On the basis of a live geological and technological model of the Hadiach oil and gas condensate field, an investigation has been made of the process of injecting carbon dioxide into the reservoir of the V-16 horizon in order to slow down the flow of formation water into gas-saturated intervals and displace residual natural gas reserves. Based on the results of modeling the development of the V-16 horizon of the Hadiach oil and gas condensate field, a high technological efficiency of carbon dioxide injection at the gas-water contact boundary has been established. When injecting carbon dioxide, the formation pressure in the reservoir is maintained at a higher level compared to depletion development, which leads to an incr...

Research paper thumbnail of Integrated Modeling of a Geothermal Fractured Reservoir - Understanding Risk and Performance

Research paper thumbnail of Special features of tight gas reserves determination

Special features of tight gas reserves determination, based on material balance method, were char... more Special features of tight gas reserves determination, based on material balance method, were characterized, since reliability of initial hydrocarbons in place determination plays important role in future field development planning, particularly on recovery rate, wells to be drilled, capital expenditures, surface facilities etc. Using the synthetic 3D model of gas reservoir, different development scenarios were evaluated according to the different spatial distribution patterns of petrophysical properties within the reservoir. Analyzing the obtained results, the authors fully confirmed an assumption made, that significant heterogeneity of reservoir properties makes a great impact on the shape of pseudo reservoir pressure curve vs cumulative gas produced and introduces significant errors into determination of initial gas in place. At the late stages of the development, the slope of P/z straight line changes, and this allows determination of much greater reserves’ volumes. Usage of pseu...

Research paper thumbnail of Evaluation of black-oil PVT-model applicability for simulation of gas-condensate reservoirs

Мінеральні ресурси України

Creation of geological and simulation models is the necessary condition for decision making towar... more Creation of geological and simulation models is the necessary condition for decision making towards current development status, planning of well interventions, field development planning and forecasting. In case of isothermal process, for proper phase behavior and phase transitions two key approaches are used: a) simplified model of non-volatile oil, so called “black oil” model, in which each phase – oil, water and gas, are represented by respective component, and solution to fiow equations is based on finding the saturations and pressures in each numerical cell, and change of reservoir fiuid properties is defined in table form as a function of pressure; b) compositional model, in which based on equation of state, phase equilibrium is calculated for hydrocarbon and non-hydrocarbon components, and during fiow calculations, apart from saturations and pressures, oil and gas mixture is brought to phase equilibrium, and material balance is calculated for each component in gas and liquid ...

Research paper thumbnail of Evaluation of Potential Applicability of Depleted Gas-Condensate Fields for CO2 Sequestration and EOR: Synthetic Case Study

1st Geoscience & Engineering in Energy Transition Conference

Research paper thumbnail of Cloud-Based Solutions for Collaborative Modeling of Geothermal Projects

82nd EAGE Annual Conference & Exhibition

Research paper thumbnail of Research of the water-pressure system small show influence on the material balance reliability

Prospecting and Development of Oil and Gas Fields

Охарактеризовано вплив водонапірної системи на характер залежності приведеного середнього пластов... more Охарактеризовано вплив водонапірної системи на характер залежності приведеного середнього пластового тиску від накопиченого видобутку газу з родовища. Зроблено припущення, що незначний вплив законтурної водоносної частини покладу не впливає на характер залежності приведеного середнього пластового тиску від накопиченого видобутку газу, і характер цієї залежності повною мірою характеризує газовий режим розробки покладу. Використання матеріального балансу в такому випадку призводить до завищення початкових запасів газу, оскільки в процесі впровадження певного об'єму води в продуктивну газонасичену частину покладу частково компенсує зниження пластового тиску внаслідок відбору газу. Таким чином, не знаючи достовірних початкових запасів газу, неможливо раціонально проектувати систему розробки та надавати рекомендації щодо вдосконалення системи розробки родовища, що потребує значних капіталов-кладень. Для підтвердження цього припущення створено синтетичну тривимірну модель газового по...

Research paper thumbnail of Investigation of the influence of the carbon dioxide (CO2) injection rate on the activity of the water pressure system during gas condensate fields development

E3S Web of Conferences

The development of gas condensate fields under the conditions of elastic water drive is character... more The development of gas condensate fields under the conditions of elastic water drive is characterized by uneven movement of the gas-water. Factors of hydrocarbon recovery from producing reservoirs which are characterized by the active water pressure drive on the average make up 50-60%. To increase the efficiency of fields development, which are characterized by an elastic water drive, a study of the effect of different volumes of carbon dioxide injection at the gas-water contact on the activity of the water pressure system and the process of flooding producing wells was carried out. Using a three-dimensional model, the injection of carbon dioxide into wells located at the boundary of gas-water contact with flow rates from 20 to 500 thousand m3/day was investigated. Analyzing the simulation data, it was found that increasing the volume of carbon dioxide injection provides an increase in accumulated gas production and a significant reduction in water production. The main effect of the...

Research paper thumbnail of Hydrogen From Depleted/Depleting Hydrocarbon Reservoirs: is it Feasible?

The Fourth EAGE Global Energy Transition Conference and Exhibition

Research paper thumbnail of Challenges of Steady-State CO2 Injection Network Optimization Studies

The Fourth EAGE Global Energy Transition Conference and Exhibition

Research paper thumbnail of Geomechanical Analysis of Caprock Integrity and Fault Stability for Greensand CO2 Storage Project Feasibility

Day 2 Wed, September 06, 2023

A comprehensive geomechanical assessment is carried out to investigate the upper pressure limit o... more A comprehensive geomechanical assessment is carried out to investigate the upper pressure limit of CO2 injection for the depleted oil Frigg Sand reservoir in Nini field, offshore Denmark. The mechanical stability of the Frigg Sand reservoir, shale caprock and key intersecting faults were investigated under the forecasted CO2 injection plan using a field-scale coupled finite element model built for the target storage reservoir. The field-scale geomechanical model is built by preparing a 3D grid which covers the entire Greensand field structure including the basement and overburden up to the seabed. The geomechanical properties and parameters are constrained using the well-centric data and propagated in 3D grid using geostatistical approach combined with surface seismic data. A finite element model is prepared and coupled with the reservoir flow dynamic model for the interested zone of the studied area. The results of the finite element model are used to investigate the integrity of t...

Research paper thumbnail of Application of Digital Rocks Technology to Carbon Storage: Greensand Project Case Study

84th EAGE Annual Conference & Exhibition

Research paper thumbnail of CO2 Plume Geothermal (CPG) in Depleted Gas Reservoirs: Sensitivity Analysis on Key Parameters

84th EAGE Annual Conference & Exhibition

Research paper thumbnail of Engineering design of CO2 storage in saline aquifers and in depleted hydrocarbon reservoirs: similarities and differences

First Break

Abstract The types of geological structures suitable for CO2 storage are saline aquifers (SA) and... more Abstract The types of geological structures suitable for CO2 storage are saline aquifers (SA) and depleted hydrocarbon reservoirs (DHR). It is well-known that a direct comparison is often somewhat misleading; the preferences depend on many factors, including availability, logistical and economic concerns. However, advantages and disadvantages in terms of various engineering aspects are often compared. We summarize the state-of-the-art of knowledge on the use of SAs and DHRs. Physical processes involved, analytical and numerical approaches for capacity and injectivity estimations, containment, wellbore and near-wellbore challenges and logistical options are discussed for both options. Comparisons are made considering engineering design for the onshore and offshore cases together with the preliminary economics.

Research paper thumbnail of Numerical Assessment of Halite Precipitation Impact on Cyclic CO2 Injection into Saline Aquifers

Research paper thumbnail of Greensand Focused Seismic Monitoring for Offshore CO2 Pilot Injection

Research paper thumbnail of Integrated approach for geothermal reservoir studies : geology, fluid flow and geomechanics

Geothermal reservoirs are characterized by complex geological structures associated with faulted ... more Geothermal reservoirs are characterized by complex geological structures associated with faulted and fractured formations. Highly conductive fractures are the main flow channels and therefore, are the primary targets in well placement design. During the reservoir development, reinjection of cold water at high rates will not only change the stress field but could lead to undesired events like, fault reactivation and potential seismic activity. Coupling fluid flow and geomechanical simulators allows the assessment of potential impact of reservoir operation on the subsurface system, notably the change of flow direction and the closure and opening of fracture networks, affecting the performance of the system as a heat exchanger, and the occurrence of microseismic events due to the reactivation of faults, impacting public acceptance.

Research paper thumbnail of Functional Comparison of Wellbore-Reservoir Coupling Solutions for Co2 Storage Simulations

83rd EAGE Annual Conference & Exhibition

Research paper thumbnail of Gas-Condensate Fluid PVT Model Quality Check Based on the Concept of a Single-Cell Simulation Model

Bulletin of the National Technical University "KhPI". Series: Chemistry, Chemical Technology and Ecology, 2020

The problems of gas-condensate PVT-models (Pressure Volume Temperature, PVT) creation under limit... more The problems of gas-condensate PVT-models (Pressure Volume Temperature, PVT) creation under limited input information were analyzed. Traditional fluid phase behavior characterization approach relies on creation of the equation of state (EOS) based on initial composition of reservoir fluid and its future regression for critical parameters (pressure and temperature), binary interaction coefficients, acentric factors of residual “plus” fraction or pseudo-components. The adjustment is done until the moment when EOS is reproducing the results of laboratory experiments. Classic PVT experiments performed on gas-condensates and volatile oils are constant composition expansion (CCE), constant volume depletion (CVD) and separator tests. However, in the case of most Ukrainian fields, discovered and explored in the last century, not only the reliable detailed initial fluid composition is not available, but phase behavior was studied with non-equilibrium method of so-called differential condensa...

Research paper thumbnail of Gas-Condensate Fluid PVT Model Quality Check Based on the Concept of a Single-Cell Simulation Model

Bulletin of the National Technical University "KhPI". Series: Chemistry, Chemical Technology and Ecology, 2020

The problems of gas-condensate PVT-models (Pressure Volume Temperature, PVT) creation under limit... more The problems of gas-condensate PVT-models (Pressure Volume Temperature, PVT) creation under limited input information were analyzed. Traditional fluid phase behavior characterization approach relies on creation of the equation of state (EOS) based on initial composition of reservoir fluid and its future regression for critical parameters (pressure and temperature), binary interaction coefficients, acentric factors of residual “plus” fraction or pseudo-components. The adjustment is done until the moment when EOS is reproducing the results of laboratory experiments. Classic PVT experiments performed on gas-condensates and volatile oils are constant composition expansion (CCE), constant volume depletion (CVD) and separator tests. However, in the case of most Ukrainian fields, discovered and explored in the last century, not only the reliable detailed initial fluid composition is not available, but phase behavior was studied with non-equilibrium method of so-called differential condensa...

Research paper thumbnail of Increasing the degree of hydrocarbon recovery factor from the water-flooded Hadiach oil and gas condensate field by injection of carbon dioxide

Prospecting and Development of Oil and Gas Fields

To investigate the effectiveness of technologies for the secondary production of hydrocarbons by ... more To investigate the effectiveness of technologies for the secondary production of hydrocarbons by injecting non-hydrocarbon gases into productive reservoirs, a study has been carried out using the Schlumberger’s prime hydrodynamic simulation tools –Eclipse and Petrel. On the basis of a live geological and technological model of the Hadiach oil and gas condensate field, an investigation has been made of the process of injecting carbon dioxide into the reservoir of the V-16 horizon in order to slow down the flow of formation water into gas-saturated intervals and displace residual natural gas reserves. Based on the results of modeling the development of the V-16 horizon of the Hadiach oil and gas condensate field, a high technological efficiency of carbon dioxide injection at the gas-water contact boundary has been established. When injecting carbon dioxide, the formation pressure in the reservoir is maintained at a higher level compared to depletion development, which leads to an incr...

Research paper thumbnail of Integrated Modeling of a Geothermal Fractured Reservoir - Understanding Risk and Performance

Research paper thumbnail of Special features of tight gas reserves determination

Special features of tight gas reserves determination, based on material balance method, were char... more Special features of tight gas reserves determination, based on material balance method, were characterized, since reliability of initial hydrocarbons in place determination plays important role in future field development planning, particularly on recovery rate, wells to be drilled, capital expenditures, surface facilities etc. Using the synthetic 3D model of gas reservoir, different development scenarios were evaluated according to the different spatial distribution patterns of petrophysical properties within the reservoir. Analyzing the obtained results, the authors fully confirmed an assumption made, that significant heterogeneity of reservoir properties makes a great impact on the shape of pseudo reservoir pressure curve vs cumulative gas produced and introduces significant errors into determination of initial gas in place. At the late stages of the development, the slope of P/z straight line changes, and this allows determination of much greater reserves’ volumes. Usage of pseu...

Research paper thumbnail of Evaluation of black-oil PVT-model applicability for simulation of gas-condensate reservoirs

Мінеральні ресурси України

Creation of geological and simulation models is the necessary condition for decision making towar... more Creation of geological and simulation models is the necessary condition for decision making towards current development status, planning of well interventions, field development planning and forecasting. In case of isothermal process, for proper phase behavior and phase transitions two key approaches are used: a) simplified model of non-volatile oil, so called “black oil” model, in which each phase – oil, water and gas, are represented by respective component, and solution to fiow equations is based on finding the saturations and pressures in each numerical cell, and change of reservoir fiuid properties is defined in table form as a function of pressure; b) compositional model, in which based on equation of state, phase equilibrium is calculated for hydrocarbon and non-hydrocarbon components, and during fiow calculations, apart from saturations and pressures, oil and gas mixture is brought to phase equilibrium, and material balance is calculated for each component in gas and liquid ...

Research paper thumbnail of Evaluation of Potential Applicability of Depleted Gas-Condensate Fields for CO2 Sequestration and EOR: Synthetic Case Study

1st Geoscience & Engineering in Energy Transition Conference

Research paper thumbnail of Cloud-Based Solutions for Collaborative Modeling of Geothermal Projects

82nd EAGE Annual Conference & Exhibition

Research paper thumbnail of Research of the water-pressure system small show influence on the material balance reliability

Prospecting and Development of Oil and Gas Fields

Охарактеризовано вплив водонапірної системи на характер залежності приведеного середнього пластов... more Охарактеризовано вплив водонапірної системи на характер залежності приведеного середнього пластового тиску від накопиченого видобутку газу з родовища. Зроблено припущення, що незначний вплив законтурної водоносної частини покладу не впливає на характер залежності приведеного середнього пластового тиску від накопиченого видобутку газу, і характер цієї залежності повною мірою характеризує газовий режим розробки покладу. Використання матеріального балансу в такому випадку призводить до завищення початкових запасів газу, оскільки в процесі впровадження певного об'єму води в продуктивну газонасичену частину покладу частково компенсує зниження пластового тиску внаслідок відбору газу. Таким чином, не знаючи достовірних початкових запасів газу, неможливо раціонально проектувати систему розробки та надавати рекомендації щодо вдосконалення системи розробки родовища, що потребує значних капіталов-кладень. Для підтвердження цього припущення створено синтетичну тривимірну модель газового по...

Research paper thumbnail of Investigation of the influence of the carbon dioxide (CO2) injection rate on the activity of the water pressure system during gas condensate fields development

E3S Web of Conferences

The development of gas condensate fields under the conditions of elastic water drive is character... more The development of gas condensate fields under the conditions of elastic water drive is characterized by uneven movement of the gas-water. Factors of hydrocarbon recovery from producing reservoirs which are characterized by the active water pressure drive on the average make up 50-60%. To increase the efficiency of fields development, which are characterized by an elastic water drive, a study of the effect of different volumes of carbon dioxide injection at the gas-water contact on the activity of the water pressure system and the process of flooding producing wells was carried out. Using a three-dimensional model, the injection of carbon dioxide into wells located at the boundary of gas-water contact with flow rates from 20 to 500 thousand m3/day was investigated. Analyzing the simulation data, it was found that increasing the volume of carbon dioxide injection provides an increase in accumulated gas production and a significant reduction in water production. The main effect of the...