Quantitative determination of pore and throat parameters in tight oil reservoir using constant rate mercury intrusion technique

A number of experiments on fluid flow at the micro/nano-scale have demonstrated that flow velocity obviously deviates from the classical Poiseuille's law due to the micro forces between the wall and the fluid. Based on an oil-water two-phase network simulation model, a three-dimensional pore-scale micro network model with solid-liquid interfacial effects was established. The influences of solid-liquid interface effects including van der Waals force and wettability on the residual oil distribution and relative permeability were investigated through microscopic simulation. The effects of pore radius, pore-throat size ratio, shaping factor, and coordination number on the residual oil distribution were analyzed at the same time. The results showed that the oil recovery would be overestimated by about 4% without van der Waals force in a water-wet reservoir. The impact of van der Waals force on water-wet reservoirs was significantly obvious in contrast with oil-wet reservoirs. In addition, the residual oil distribution was significantly influenced by pore radius in water-wet reservoir, comparatively influenced by pore-throat size ratio in oil-wet reservoir. The present study illustrates the successful application of three-dimensional micro network models considering solid-liquid interfacial effects, and provides new insights for oil recovery enhancement.

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“…Therefore, residual oil can be easily detained in the pores with a small throat. A similar result was observed by Gao et al [52]. …”

Section: Pore-throat Size Ratiosupporting

confidence: 91%

Solid-Liquid Interfacial Effects on Residual Oil Distribution Utilizing Three-Dimensional Micro Network Models

Zhu

Liu

et al. 2017

Energies

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“…In this method, mercury is injected into the sample and the pressure is increased during the process by simultaneously measuring the volume of mercury introduced. The pore diameter of the part is related to the pressure required to inject the mercury [26]. The pressure and volume of mercury introduced were correlated in order to obtain the percentage porosity and the pore size distribution of the sample.…”

Section: Porosity Contact Angle and Xrdmentioning

confidence: 99%

Polyurethane Foam Reinforced with Fibers Pineaplle Crown Biocomposites for Sorption of Vegetable Oil

2020

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The concern in reducing the environmental impacts caused by human interference is increasing. Thus, the objective of this study was to generate a sustainable solution for sorption of vegetable oil. It was developed and characterized biocomposites obtained from polyurethane derived from castor oil reinforced with fibers from the crown of pineapple for sorption of vegetable oil. The biocomposites were obtained by mass mixing the polyol with the prepolymer (1:1) and reinforced with 5 to 20 % (wt/wt) pineapple crown fiber in 18 and 35 mesh granulometry. The biocomposites and pure polyurethane were characterized by scanning electron microscopy (SEM), optical microscopy (OM), X-ray Diffraction (XRD), porosimetry, contact angle, and density. Sorption tests were carried out on the biocomposites and pure polyurethane (PU). The sorption capacity of the biocomposites was evaluated as a function of the fiber content inserted in the matrix. Results of the sorption tests showed that the biocomposites reinforced with fibers of 18 mesh (20 % wt) presented approximately twice the sorption capacity when compared to pure PU and others biocomposites results, due to high porosity combined with high surface area, which influenced directly in the oil sorption. Response surface methodology (RSM) tecnique confirmed the influence fibers granulometry and content on oil sorption.

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“…Thus, it is very important to quantitatively determine the dominant pore and throat parameters. The mercury intrusion method is a powerful technique for the evaluation of capillary pressure, porosity, pore size distribution and throat size in the oil and gas reservoir [32]. In this study, high-pressure mercury intrusion was adopted in four groups of tight sandstone cores to characterize the microscopic pore structure of a tight sandstone reservoir.…”

Section: Effect Of Reservoir Micropore Throatmentioning

confidence: 99%

Study of the Effect of Movable Water Saturation on Gas Production in Tight Sandstone Gas Reservoirs

Zhang

Shen

et al. 2020

Energies

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The movable water saturation of tight sandstone reservoirs is an important parameter in characterizing water production capacity, and there is a great need to understand the relationship between movable water saturation and water production characteristics. However, movable water behavior in this context remains unclear. In this study, four groups of tight sandstone cores from the Sulige gas field are measured to understand the movable water saturation characteristics. Then, the effects such as reservoir micropore throat, clay mineral and physical properties on movable water saturation are analyzed, and the movable water saturation and water production characteristics are discussed. The results show that higher movable water saturation will result in a greater amount of water in the gas drive. There is a critical pressure difference of the gas drive, and a large amount of movable water will flow out. Movable water saturation is independent of the porosity, permeability and initial water saturation, while it is closely related to the reservoir micropore throat and clay mineral content. Movable water is mainly distributed in the medium and large pores; the larger the proportion of such pores, the higher the degree of movable water saturation. A lower mineral content will lead to higher movable water saturation in tight sandstone gas reservoirs. These results provide clues for identifying gas–water bearing reservoirs and evaluating and predicting the water production characteristics in gas wells in tight sandstone gas reservoirs.

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Quantitative determination of pore and throat parameters in tight oil reservoir using constant rate mercury intrusion technique

Cited by 27 publications

References 19 publications

Solid-Liquid Interfacial Effects on Residual Oil Distribution Utilizing Three-Dimensional Micro Network Models

Solid-Liquid Interfacial Effects on Residual Oil Distribution Utilizing Three-Dimensional Micro Network Models

Polyurethane Foam Reinforced with Fibers Pineaplle Crown Biocomposites for Sorption of Vegetable Oil

Study of the Effect of Movable Water Saturation on Gas Production in Tight Sandstone Gas Reservoirs

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