The technology and application of thequantitative characterization of different occurrencesof shaleoil

Jiang, Qigui; Li, Maowen; Qian, Menhui; Li, Zhiming; Li, Zheng; Huang, Zhenkai; Caimin, Zhang

doi:10.1111/1755-6724.12306_16

Cited by 2 publications

(9 citation statements)

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“…However, S 2-2 is regarded as hydrocarbons from kerogen pyrolysis. 43,44 Thus, oil molecules with different mobilities can be accurately identified by programmed pyrolysis experiments.…”

Section: Theoretical Basis Of the Pore Division Methodsmentioning

confidence: 99%

“…11,41 However, the phenomenon that S 1 also contains some adsorbed oil and S 2 contains part of free oil has been revealed. 42,44 In such cases, the occurrence state of shale oil is redefined by multiple isothermal stages of pyrolysis. 40,44,45 Four key peaks, including S 1-1 , S 1-2 , S 2-1 , and S 2-2 , are obtained during pyrolysis experiments.…”

Section: Theoretical Basis Of the Pore Division Methodsmentioning

confidence: 99%

“…42,44 In such cases, the occurrence state of shale oil is redefined by multiple isothermal stages of pyrolysis. 40,44,45 Four key peaks, including S 1-1 , S 1-2 , S 2-1 , and S 2-2 , are obtained during pyrolysis experiments. S 1-1 mainly corresponds to light oil components, S 1-2 is primarily composed of medium oil fractions, and S 2-1 is characterized as heavy hydrocarbons and colloid asphaltene (Figure 2).…”

Section: Theoretical Basis Of the Pore Division Methodsmentioning

confidence: 99%

“…The multiple isothermal stages of pyrolysis were performed on a powder sample with a size of ∼100 mesh using a Rock-Eval 6 Instrument. The heating sequence and temperature completely refer to the work of Jiang et al: 44 specifically, with a heating rate of 25 °C/ min to 200 °C and holding for 1 min to obtain S 1-1 , followed by a temperature of 25 °C/min to 350 °C and holding for 1 min to get S 1-2 . The temperature continued to rise to 450 °C with a rate of 25 °C/min and remained for 1 min to acquire S 2-1 .…”

Section: Samples and Methodsmentioning

confidence: 99%

“…This phenomenon is mainly caused by the great loss of light hydrocarbons with high mobility during coring, sampling, storage, and sample preparation. 37 The S 1-2 , an indicator of medium hydrocarbons, 43,44 shows the highest value, ranging from 0.1 to 10.61 mg/g (mean: 3.27 mg/g). Especially, the superior S 1-2 implies that although the medium component is free oil (Figure 2), it is not prone to leakage at normal temperature and pressure.…”

Section: Occurrence Characteristics Of Shalementioning

confidence: 99%

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Novel Method for the Classification of Shale Oil Reservoirs Associated with Mobility: Inspiration from Gas Adsorption and Multiple Isothermal Stage Pyrolysis

Gou

Chen

et al. 2023

Energy Fuels

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The characterization and description of pores in shale oil reservoirs have long been based on the classification of micropores (<2 nm), mesopores (2–50 nm), and macropores (>50 nm) in shale gas reservoirs. However, the great difference between oil and gas molecules leads to its poor applicability, which further results in the relationship between oil properties and pores being rarely understood. To establish an individual pore division method for shale oil reservoirs, N2 adsorption, Soxhlet extraction, and programmed pyrolysis were performed on the Paleogene Xin’gouzui lacustrine shale in the Jianghan Basin. With the results, a new classification method, i.e., adsorption pores (pore diameter <20 nm), restricted pores (20–100 nm), and movable pores (>100 nm), was proposed. A fractal theory and scanning electron microscopy (SEM) images confirm the rationality of this method. Hydrocarbons in movable pores determine the initial productivity of a shale oil well, while those in restricted pores are closely related to the production time of a well to some extent. Compared to the previous division methods, this novel method reveals the correlation between shale oil attributes as well as movability and pore spaces for the first time. Our work can provide more accurate evaluation results for shale oil recoverable resource potential and is of great significance for optimizing favorable areas and reducing exploration risks.

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“…However, S 2-2 is regarded as hydrocarbons from kerogen pyrolysis. 43,44 Thus, oil molecules with different mobilities can be accurately identified by programmed pyrolysis experiments.…”

Section: Theoretical Basis Of the Pore Division Methodsmentioning

confidence: 99%

Section: Theoretical Basis Of the Pore Division Methodsmentioning

confidence: 99%

Section: Theoretical Basis Of the Pore Division Methodsmentioning

confidence: 99%

Section: Samples and Methodsmentioning

confidence: 99%

Section: Occurrence Characteristics Of Shalementioning

confidence: 99%

See 3 more Smart Citations

Novel Method for the Classification of Shale Oil Reservoirs Associated with Mobility: Inspiration from Gas Adsorption and Multiple Isothermal Stage Pyrolysis

Gou

Chen

et al. 2023

Energy Fuels

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An Improved Method for Evaluating Hydrocarbon Generation of Shale: A Case Study of the Lower Cretaceous Qingshankou Formation Shale in the Songliao Basin

ZHANG,

WANG,

et al. 2023

Acta Geologica Sinica (Eng)

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Because of the influence of hydrocarbons, especially adsorbed hydrocarbons, on the detection of cracked hydrocarbon (S2) and total organic carbon (TOC), the hydrogen index (HI) based hydrocarbon generation model deviates from actual practice. In this study, the shale in the first member of the Qingshankou Formation in the central depression of the Songliao Basin was taken as the research object and a correction method for S2 and TOC was established. By correcting the experiment results of different maturity samples, the actual hydrocarbon generation model was revealed, the differences before and after correction were compared, and the evolution characteristics of the adsorbed hydrocarbon content were clarified. The results showed that the organic matter enters the hydrocarbon generation threshold at Ro–0.5% and reaches the hydrocarbon generation peak at Ro–1.0% and that the hydrocarbon generation process ends at Ro–1.3%. The hydrocarbon generation model established based on the measured values has a “lag effect” compared to actual values, which extends the hydrocarbon generation window of organic matter and delays the hydrocarbon generation peak. With the increase of maturity, adsorbed hydrocarbon content shows the characteristics of “first increasing, then stabilizing, and then decreasing”, and reaches the most abundant stage at Ro of 0.9%–1.3%.

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The technology and application of thequantitative characterization of different occurrencesof shaleoil

Cited by 2 publications

References 0 publications

Novel Method for the Classification of Shale Oil Reservoirs Associated with Mobility: Inspiration from Gas Adsorption and Multiple Isothermal Stage Pyrolysis

Novel Method for the Classification of Shale Oil Reservoirs Associated with Mobility: Inspiration from Gas Adsorption and Multiple Isothermal Stage Pyrolysis

An Improved Method for Evaluating Hydrocarbon Generation of Shale: A Case Study of the Lower Cretaceous Qingshankou Formation Shale in the Songliao Basin

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