Rezultaty - reservoir simulation
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61
Well Testing of Fracture Corridors in Naturally Fractured Reservoirs for an Improved Recovery Strategy
Wydane 2025-07-01“…Naturally fractured reservoirs (NFRs) account for a significant portion of the world’s oil and gas reserves. …”Naturally fractured reservoirs (NFRs) account for a significant portion of the world’s oil and gas reserves. Among them, corridor-type NFRs, characterized by discrete fracture corridors, exhibit complex flow behavior that challenges conventional development strategies and reduces recovery efficiency...
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62
Improved Correlation of Oil Recovery Factor for Water Driven Reservoirs in the Niger Delta
Wydane 2025-07-01“…Over the years, many different approaches have been taken to estimating recovery factor of oil and gas reservoirs generally and these include simulations, volumetric method and correlations. …”Recovery factor is one of the most important variables for a reservoir engineer as it plays a major role in determining the economic viability of oil and gas projects and by implication what projects to mature. Over the years, many different approaches have been taken to estimating recovery factor...
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63
Experimental Study of Hydrogen Synthesis under Conditions of a Natural Gas Reservoir
Wydane 2024-06-01“…The process simulates injecting steam into a preheated porous medium mixed with hydrocarbon gas, specifically methane, at a reservoir pressure of 80 atm. …”This research discusses issues related to hydrogen production, a promising source of “green” energy. Various methods of hydrogen production are considered, along with a new technology for hydrogen synthesis in natural gas reservoirs that has never been implemented before. At the same time, existing...
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64
Comparative analysis of pure CO2 and CO2 enhanced polymer flooding: a numerical modelling approach
Wydane 2025-03-01Hasła przedmiotowe: “…CO2 enhanced polymer flooding, CO2 sequestration, Numerical reservoir modeling and simulation, Oil recovery factor, Chemical flooding…”In this research, the mechanism of pure CO2 flooding and that of CO2 enhanced polymer flooding were studied, and their efficiencies as they relate to recovery efficiency, displacement sweep e ciency, oil cumulative recovery, etc., were compared. CMG software was used for the modelling of the EOR tec...
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65
Study on the deformation monitoring of waterproof sealed walls in underground water reservoirs of coal mines
Wydane 2025-06-01“…In response to the issues of simple monitoring methods, low efficiency, and the inability to reflect the overall surface deformation of waterproof sealed walls, a monitoring scheme for the deformation of waterproof sealed walls in underground water reservoirs of coal mines is proposed. Based on the principle of binocular positioning, deformation calculation formulas for single-point protrusion and depression on the surface of the sealed wall were provided, along with the calculation logic for three-dimensional cloud map imaging of surface deformation. …”In response to the issues of simple monitoring methods, low efficiency, and the inability to reflect the overall surface deformation of waterproof sealed walls, a monitoring scheme for the deformation of waterproof sealed walls in underground water reservoirs of coal mines is proposed. Based on the...
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66
Experimental Technique for Modeling Multi-Field Coupled Transport in Multi-Fracture Geothermal Reservoirs
Wydane 2025-07-01“…In this paper, a multi-field coupling experimental simulation technique was designed for a multi-fracture geothermal reservoir. …”In the operation of enhanced geothermal systems (EGSs), complex physical and chemical coupling processes, which are crucial for the efficient exploitation of geothermal energy, are involved. In situ studies of multi-fracture hot dry rocks (HDRs) face significant challenges, leading to a shortage of...
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67
Research and Application of Low-Velocity Nonlinear Seepage Model for Unconventional Mixed Tight Reservoir
Wydane 2025-07-01“…Considering the time-varying physical parameters of different types of sand bodies, a nonlinear seepage coefficient is derived based on permeability and capillary force, and a low-velocity nonlinear seepage model for beach bar sand reservoirs is established. Based on core displacement experiments of different types of sand bodies, the low-velocity nonlinear seepage coefficient was fitted and numerical simulation of low-velocity nonlinear seepage in beach-bar sandstone reservoirs was carried out. …”Due to factors such as low porosity and permeability, thin sand body thickness, and strong interlayer heterogeneity, the fluid flow in the tight reservoir (beach-bar sandstone reservoir) exhibits obvious nonlinear seepage characteristics. Considering the time-varying physical parameters of different...
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68
Forecast of oil and gas reservoirs of the Sea of Okhotsk based on interpretation processing of seismic material
Wydane 2023-12-01“…The research methodology included selection of the location of points for simulating “vertical wells” in order to analyze the geodynamics of the medium; multiplex parametric transformations of wave fields taking into account diagnostic significant attributes and building a multiparametric cluster; selection of oil and gas deposits; formation of images of oil and gas deposits; local forecast of improved reservoir properties and saturation; refinement of the geometry of target surfaces with forecast data in actual points (vertical wells); forecast of the area of target surfaces; spatial mapping of the largest hydrocarbon deposits.Results. …”Background. This article analyses the results of geological and geophysical studies conducted in the Okhotsk Sea area with the purpose of developing methods for processing seismic information in combination with other data to solve the problems of forecasting hydrocarbon deposits.Aim. Solving proble...
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69
The influence of non-native invertebrate species in the food web structure of two Neotropical reservoirs
Wydane 2023-06-01“…We quarterly collected fish and benthonic macroinvertebrates samples in the Volta Grande and Funil reservoirs between October 2015 and August 2016. We used conventional methods of diet evaluation to assess the sampled fish and measured the availability of invertebrates (i.e. composition and density) present in the sediment samples from each reservoir. …”To investigate the influence of non-native aquatic invertebrate species on food web structure, we selected two reservoirs located in the Grande River (upper Paraná River basin, Brazil) with similar fish communities, different age and different taxa introductions history. We quarterly collected fish...
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70
Integrating Reservoir Dynamics Into Differentiable Process‐Based Hydrological Model for Enhanced Streamflow Estimation
Wydane 2025-07-01“…For instance, in the Rengali catchment, this additional input improved streamflow prediction from NSE 0.65 to 0.74 while also enhancing simulations of untrained variables: evapotranspiration (bias reduced from 0.46 to 0.39 mm), soil moisture (bias reduced from −21.42 to −7.34 mm), reservoir outflows (NSE from 0.42 to 0.49), and reservoir storage (correlation from 0.37 to 0.74). …”Abstract Reliable hydrological predictions are crucial for water allocation, reservoir operations, and flood control. While data‐driven models like Long Short‐Term Memory (LSTM) offer high accuracy, they lack physical interpretability and cannot estimate internal hydrological states or reservoir‐spe...
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71
Investigation of Hydraulic Fracture Propagation Characteristics in the Shale Reservoir With Natural Fractures and Bedding Plane
Wydane 2025-01-01“…The manuscript builds a small-scale shale reservoir model that containing randomly complex natural fractures and bedding by means of the continuous–discontinuous element method (CDEM); it provides detailed investigation of the effects including the shale reservoir burial depth along with the fracturing fluid viscosity, and flow rate on the generation and growth of fracture systems. …”Hydraulic fracturing is the principal technical method about the generation of sophisticated fracture system in shale gas development; there are still significant challenges in enunciating the origination and extension of hydraulic fracture and optimizing design methods about hydraulic fracturing. T...
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72
Optimizing Reservoir Operations to Mitigate Nutrient and Phytoplankton Exports From a Eutrophic Lake
Wydane 2025-07-01“…In this study, lake eutrophication processes, including phytoplankton production and nutrient cycling, were simulated and coupled with a reservoir operations model to optimize multi‐criteria lake operation goals. …”Abstract Harmful algal blooms have large impacts on aquatic ecosystem and human health. Nutrient enrichment, in combination with warm water temperatures, high sunlight availability, and low water turbulence, have been proven to be major factors driving algal blooms. In this study, lake eutrophicatio...
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73
Modelling the coupled heterogeneities of the lacustrine microbialite-bearing carbonate reservoir of the Yacoraite Formation (Salta, Argentina)
Wydane 2023-01-01“…The bi-variate plurigaussian geostatistical method is applied to simulate in parallel these two types of heterogeneity in a 3D reservoir-scale geological model. …”The Yacoraite Formation is a complex lacustrine microbialite-bearing carbonate formation whose heterogeneity is due to different sedimentary facies associations and several microbialite geobodies. The bi-variate plurigaussian geostatistical method is applied to simulate in parallel these two types o...
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74
Material Balance Equation for Fractured Vuggy Reservoirs with Aquifer Multiples: Case Study of Fuman Oilfield
Wydane 2025-07-01“…Furthermore, by comparing simulated formation pressures (excluding aquifer effects) with actual static pressures, the contribution of external aquifer support to reservoir energy can be quantitatively assessed. …”Accurate dynamic reserve estimation is essential for effective reservoir development, particularly in fractured vuggy carbonate reservoirs characterized by complex pore structures, multiple spatial scales, and pronounced heterogeneity. Traditional reserve evaluation methods often struggle to account...
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75
Application of Multi-Scale Geological Modeling Technology in Sweet Spot Prediction of Shale Oil Reservoirs
Wydane 2025-06-01“…Taking the Jurassic lacustrine shale oil reservoir in Langzhong area of Sichuan basin as an example, to enhance the favorable lithofacies drilling encounter rate of horizontal wells, this study improves modeling accuracy through iterative optimization of structural models based on geological data, 3D seismic data, and horizontal well drilling insights. …”Fine 3D modeling technology comprehensively considers the complex coupling relationships between geological and engineering factors, providing scientific support and guidance for efficient development of unconventional shale oil. Taking the Jurassic lacustrine shale oil reservoir in Langzhong area o...
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76
Framework for extracting multi-objective operation rules for cascade reservoirs based on causal features and physical mechanisms
Wydane 2025-08-01“…However, the “black-box” nature of these models and challenges associated with high-dimensional inputs impede simulation of reservoir operations. To overcome these issues, this study proposes a rule extraction framework. …”Study region: The cascade reservoirs in the middle and lower Yalong River, China Study Focus: Coordinated optimal operation of cascade reservoirs can improve hydropower benefits. Deep learning models can extract reservoir operation rules by mapping known conditions to outflow discharge decisions. Ho...
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77
On the Interpretation Technique of Three-Phase Saturation of Logging Data Acquired with Pulsed Neutron Spectral Tool
Wydane 2025-06-01Hasła przedmiotowe: “…calcareous sandstone reservoir…”Relatively low salinity of formation water and rich calcium in sandstone layers in the underground gas storage reservoirs in eastern China bring challenges to the interpretation of logging data by the pulsed neutron spectral tool (PNST). With the help of the PNST logging response numerical simulatio...
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78
A Physics‐Informed Deep Learning Framework for Estimating Thermal Stratification in a Large Deep Reservoir
Wydane 2025-07-01“…To overcome these limitations, this study proposes a hybrid multi‐parameter scientific knowledge‐guided neural network (MP‐KgNN) for solving 1‐D lake temperature governing equation trained using both simulations of the WRF‐Lake model and onsite LWT measurements based on a novel training framework called physics‐informed deep learning (PIDL) framework and simulates the thermodynamics in a large deep reservoir located in eastern China from 1960 to 2021. …”Abstract Lake water temperature (LWT) is an important indicator of physical processes within a lake, but traditional process‐based and data‐driven models are limited in their ability to estimate long‐term changes in LWT because of simplified physical laws, insufficient onsite measurements and high c...
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79
Research on the Energy Transfer Law of Polymer Gel Profile Control Flooding in Low-Permeability Oil Reservoirs
Wydane 2025-07-01“…To investigate the energy conduction behavior of polymer gel profile control and flooding in low-permeability reservoirs, a parallel dual-tube displacement experiment was conducted to simulate reservoirs with different permeability ratios. …”To investigate the energy conduction behavior of polymer gel profile control and flooding in low-permeability reservoirs, a parallel dual-tube displacement experiment was conducted to simulate reservoirs with different permeability ratios. Injection schemes included constant rates from 0.40 to 1.20...
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80
Which Offers Greater Techno-Economic Potential: Oil or Hydrogen Production from Light Oil Reservoirs?
Wydane 2025-06-01“…While field practices have demonstrated the feasibility of co-producing hydrogen and oil, the question of which offers greater economic potential, oil, or hydrogen, remains central to ongoing discussions, especially as researchers explore ways to produce hydrogen exclusively from petroleum reservoirs. This study presents the first integrated techno-economic model comparing oil and hydrogen production under varying injection strategies, using CMG STARS for reservoir simulations and GoldSim for economic modeling. …”The global emphasis on clean energy has increased interest in producing hydrogen from petroleum reservoirs through in situ combustion-based processes. While field practices have demonstrated the feasibility of co-producing hydrogen and oil, the question of which offers greater economic potential, oi...
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