Estimation of Pore Size Distribution and Permeability of Shaly Sands from Induced Polarization Time Spectra

Tong, Maosong; Li, Li; Wang, Wei-Nan; Fan, Qinghua; Jiang, Yupeng; Zhang, Jiaju; Zhu, Ding; Cui, Jie

doi:10.1002/cjg2.713

Cited by 4 publications

(2 citation statements)

References 5 publications

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“…However, it is difficult to use the same technology to quantify hydrate saturation. Traditional geophysical and lithophysical approaches can only characterize formations at the macro-scale or describe the surface morphology of rock samples, and few studies have examined the geophysical response characteristics of cores from the drilled area [8] .…”

Section: Introductionmentioning

confidence: 99%

Physical Experiment Research on Dielectric Properties of Hydrate-bearing Sediment in Sandstone Reservoir

Du¹,

Bai²,

Zhang³

et al. 2019

E3S Web Conf.

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Dielectric constants can be used to detect hydrates in permafrost regions. Therefore, this study investigated the relationships between the dielectric constant characteristics of sandstone reservoir hydrate and the hydrate saturation degree through physical simulation experiments, as well as the granularity of the surrounding rock. Methane and tetrahydrofuran (THF) hydrates with quartz sands were prepared, and their dielectric constants were analyzed. With different granularities of quartz sands, the dielectric constants of two different methane hydrate sediments decreased with increasing saturation degrees. At a given saturation degree, the dielectric constant of methane hydrate sediments with small granularity was larger than that with medium granularity, a result attributed to the unreacted water in the larger pores of the latter. In addition, the dielectric constant of methane hydrate sediments was larger than that of THF hydrates, which was also attributed to gas-phase factors and the presence of unreacted water. At a given granularity and saturation, the dielectric constants of both the THF and methane hydrates decreased with increasing saturation degrees. We conclude that at low temperature and under normal pressure, THF hydrates cannot be used as a substitute for methane hydrates in laboratory experiments investigating geophysical phenomena.

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Section: Introductionmentioning

confidence: 99%

Physical Experiment Research on Dielectric Properties of Hydrate-bearing Sediment in Sandstone Reservoir

Du¹,

Bai²,

Zhang³

et al. 2019

E3S Web Conf.

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“…Mineral mine generally has apparent complex resistivity dispersion phenomenon in specific band which is the current basis of complex resistivity measurements. A study of the complex resistivity of sandstone was conducted by Maosong Tang et al [1]. The complex resistivity (CR) application results in the oil and gas exploration was discussed by Xu Chuanjian et al [2], it has a high conformation rate and shows a good application prospect of this method.…”

Section: Introductionmentioning

confidence: 99%

Complex Resistivity Method and its Application in Mineral Resource Exploration

Tang

Xie

Yan³

2011

AMR

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Complex resistivity (CR) is one of an electromagnetic method which plays an important role in the exploration of oil and gas, underground water as well as solid mineral resources in recent years. Nowadays China is under fast developing and there is still a big gap between the supply and demand of mineral resources. As an effective controlled source electromagnetic method, CR method can be easily used to judge the content of resources, determine the target reservoir and select a favorable drilling area. In this paper, an introduction to CR method and its application in copper mine exploration in west China is present. The result shows that CR is an effective electromagnetic method in the exploration of deep mineral resources.

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A time domain induced polarization relaxation time spectrum inversion method based on a damping factor and residual correction

2014

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Relaxation time spectra (RTS) derived from time domain induced polarization data (TDIP) are helpful to assess oil reservoir pore structures. However, due to the sensitivity to the signal-to-noise ratio (SNR), the inversion accuracy of the traditional singular value decomposition (SVD) inversion method reduces with a decrease of SNR. In order to enhance the inversion accuracy and improve robustness of the inversion method to the SNR, an improved inversion method, based on damping factor and spectrum component residual correction, is proposed in this study. The numerical inversion results show that the oscillation of the RTS derived from the SVD method increased with a decrease of SNR, which makes components of the improved method, and the RTS has high inversion accuracy and robustness. Moreover, RTS derived from core sample data is basically in accord with the pore-size distribution curve, and the RTS derived from the actual induced polarization logging data is smooth and continuous, which indicates that the improved method is practicable.

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Estimation of Pore Size Distribution and Permeability of Shaly Sands from Induced Polarization Time Spectra

Cited by 4 publications

References 5 publications

Physical Experiment Research on Dielectric Properties of Hydrate-bearing Sediment in Sandstone Reservoir

Physical Experiment Research on Dielectric Properties of Hydrate-bearing Sediment in Sandstone Reservoir

Complex Resistivity Method and its Application in Mineral Resource Exploration

A time domain induced polarization relaxation time spectrum inversion method based on a damping factor and residual correction

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