Application of core X-ray microtomography in oilfield geology

Ponomarev, Andrey; Zavatsky, Mikhail D.; Nurullina, Tatiana; Kadyrov, Marsel; Galinsky, Kirill; Tugushev, Oskar

doi:10.18599/grs.2021.4.4

Cited by 13 publications

(4 citation statements)

References 34 publications

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“…The anatomical orientation of wood structures significantly influences the wood impregnation process (Frias et al, 2021;Hass et al, 2012;Tondi et al, 2013;Ponomarev et al, 2021bPonomarev et al, , 2022. The obtained images of the distribution of the impregnating composition (Figure 4b and d) show that its movement occurs along the path of least resistance in the end direction along large anatomical structures, such as vessels and fibers.…”

Section: Study Of the Porosity And Distribution Of The Impregnating C...mentioning

confidence: 96%

Improving the Performance Properties of Impregnated Wood with its Subsequent Utilization into a Biochar Sorbent

Zhuzhukin,

Tomina,

Ponomarev

et al. 2023

Floresta Ambient.

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Wood is a common natural polymeric material with hydrophilicity and low biostability with a limited service life. The article considers the issue of using a multicomponent composition (used motor oil, rosin, paraffin) for impregnating birch wood and giving it increased water resistance, bio-and dimensional stability. The possibility of recycling the used impregnated wood to obtain a biochar adsorbent was shown. The impregnating composition was characterized by the FTIR method to assess the possibility of interaction between the functional groups of the impregnating composition and wood. Moisture and water absorption decreased by more than 4 and 6 times. Volumetric swelling decreased by 57% relative to untreated wood, the effectiveness against swelling after 30 days was 46%. The high efficiency of the impregnating composition against the wood biodegradation has been established. The method of micro-X-ray tomography determined a high degree of filling of the anatomical structures of wood.

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Section: Study Of the Porosity And Distribution Of The Impregnating C...mentioning

confidence: 96%

Improving the Performance Properties of Impregnated Wood with its Subsequent Utilization into a Biochar Sorbent

Zhuzhukin,

Tomina,

Ponomarev

et al. 2023

Floresta Ambient.

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“…Buoyancy pressure (6) At the reservoir temperature and pressure, the live oil density is assumed to be ρ 0 = 710 kg/m 3 , and the brine density, ρ w = 1070 kg/m 3 . The resulting ∆ρg = 3530 Pa/m = 0.156 psi/ft.…”

Section: The Heights Of Oil Columns Necessary To Drain the Ghawar Car...mentioning

confidence: 99%

“…For example, if oil did not displace a majority of brine in the small pores, a microporous carbonate formation may not be an IOR target. Applications of our approach to fractured carbonate and sandstone formations, shales, coal seams, and to determination of remaining oil saturation abound, see e.g., [1][2][3][4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Multimodal Carbonates: Distribution of Oil Saturation in the Microporous Regions of Arab Formations

2022

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Perhaps as much as 50% of the oil-in-place in carbonate formations around the world is locked away in the easy to bypass microporosity. If some of this oil is unlocked by the improved recovery processes focused on tight carbonate formations, the world may gain a major source of lower-rate power over several decades. Here, we overview the Arab D formation in the largest oil field on earth, the Ghawar. We investigate the occurrence of microporosity of different origins and sizes using scanning electron microscopy (SEM) and pore casting techniques. Then, we present a robust calculation of the probability of invasion and oil saturation distribution in the nested micropores using mercury injection capillary pressure data available in the literature. We show that large portions of the micropores in Arab D formation would have been bypassed during primary drainage unless the invading crude oil ganglia were sufficiently long. We also show that, under prevailing conditions of primary drainage of the strongly water-wet Arab formations in the Ghawar, the microporosity there was invaded and the porosity-weighted initial oil saturations of 60–85% are expected. Considering the asphaltenic nature of crude oil in the Ghawar, we expect the invaded portions of the pores to turn mixed-wet, thus becoming inaccessible to waterflooding until further measures are taken to modify the system’s surface chemistry and/or create substantial local pore pressure gradients.

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“…Because of the existence of obvious stratification and the difference in the thermal expansion of multiphase particles, many cracks inside the oil shale appeared during the heating process. In this experiment, the X-ray Micro Tomography (μCT225kVFCB, shown in Figure 2a) was used to scan the internal structure inside the oil shale at different pyrolysis temperatures, and a series of grayscale images reflecting the internal microfine features were obtained [33][34][35]. According to the relationship between the ray intensity and material density, a clear scanned image was obtained in which white means high density particles and black represents low density material (even void spaces).…”

Section: X-ray Micro Tomography For Fracture Distributionmentioning

confidence: 99%

Investigation on the Fracture-Pore Evolution and Percolation Characteristics of Oil Shale under Different Temperatures

et al. 2022

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It is well known that underground in situ pyrolysis technology for oil shale production is a promising field. In the in situ modification mining process, the permeability property of a shale matrix has a great effect on the transport capacity of pyrolytic products. For oil shale undergoing pyrolysis, the changes of internal structure (fracture and pore space) have a considerable influence on the permeability network which further affects the migration of hydrocarbon products. In this study, based on an oil shale retorting experiment performed under different temperatures (20 °C, 100 °C, 200 °C, 300 °C, 325 °C, 350 °C, 375 °C, 400 °C, 425 °C, 450 °C, 475 °C, 500 °C, 525 °C, 550 °C, 575 °C, 600 °C), an investigation on the distribution characteristics of the fractures was conducted using micro-CT technology. Meanwhile, mercury injection porosimetry was used to characterize the pore structure of the oil shale samples under different temperatures. Finally, a fracture-pore dual medium model was constructed to calculate the percolation probability to quantitatively describe the permeability variation of oil shale with temperature. The test results indicated that the higher the temperature, the larger were the pore spaces. The increase in pore volume due to pyrolysis temperatures mainly affected the pores ranging from 10 nm to 100 nm and occurred in the specific temperature range (400 °C to 425 °C). Additionally, CT images show that the fracture morphology varied with increasing temperature and the number and length of fractures at different temperatures were in great accordance with the fractal law statistically. On the other hand, simulation of the percolation probabilities discovered that in a single pore media model over the whole range of tested temperatures they were too low to exceed the threshold. In contrast, in the dual medium model, the theoretical threshold of 31.16% was exceeded when the temperature reached 350 °C. Moreover, the results demonstrated that fractures dominated the seepage channel and had more significant effects on the permeability of oil shale. What has been done in this study will provide some guidance for the in situ fluidization mining of oil shale.

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Application of core X-ray microtomography in oilfield geology

Cited by 13 publications

References 34 publications

Improving the Performance Properties of Impregnated Wood with its Subsequent Utilization into a Biochar Sorbent

Improving the Performance Properties of Impregnated Wood with its Subsequent Utilization into a Biochar Sorbent

Multimodal Carbonates: Distribution of Oil Saturation in the Microporous Regions of Arab Formations

Investigation on the Fracture-Pore Evolution and Percolation Characteristics of Oil Shale under Different Temperatures

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