Quantitative characterisation of gas loss and numerical simulations of underground gas storage based on gas displacement experiments performed with systems of small-core devices connected in series

Wang, Jinkai; Fu, Jialin; Xie, Jun; Wang, Jieming

doi:10.1016/j.jngse.2020.103495

Cited by 22 publications

(9 citation statements)

References 26 publications

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“…The pore type of the study area sandstone is dominated by a large number of intergranular pores, which are the primary pores retained during the diagenesis process, indicating that the compaction of the rock is not too strong and it little influence on the transformation of the rock pores. 34,35 The cementation and dissolution are relatively distinct, especially the dissolution of feldspar minerals, which can be easily identified under an electron microscope. Most particles were dissolved, forming large-scale dissolution pores (Figure 10A).…”

Section: Diagenesis and Pore Evolutionmentioning

confidence: 99%

“…However, the sand bodies of the sand sheet located at the edge of the gas reservoir have low utilization rates, which can be excluded from the effective pore volume during the reconstruction process. 34,35 Based on the three-dimensional geological model, combined with the results of sedimentary facies and reservoir classification, the effective pore volumes of different types of sand bodies are calculated, and the relatively accurate values are obtained. The underwater distributary channel has good physical properties (porosity and permeability), a wide sand body distribution, large thickness, good connectivity, and high gas drive water utilization, which are all conducive to gas migration.…”

Section: Effective Pore Volume Of Underground Gas Storagementioning

confidence: 99%

“…5,30,31 The systematic evaluation of the parameters of underground gas storage is a higherlevel evaluation work which depends on the increase of a large number of new data (static and dynamic data) and more detailed research. 27,28,[32][33][34][35] Currently, most of the basic geological research in this field follows the conventional gas reservoir geology theory without a selfcontained system, and relatively few domestic and foreign-related documents have been published. However, currently, the main research focus is the 'reconstruction' of the geological body, which aims to clarify the differences between the geological research process of gas storage and that of gas reservoirs in order to provide a good theoretical basis for future processes, such as construction, expansion, and operation.…”

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confidence: 99%

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Estimating reservoir parameters and gas storage volume available in the DU6 gas field, Northeast China

Wang

2021

Int J Energy Res

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This study comprehensively evaluated the feasibility of the DU6 gas reservoir for gas storage in terms of storage performance, safety, and effectiveness. First, based on the fine division of small layers in the target area, the existing sedimentary facies markers, and paleoenvironment were identified and the fan delta front subfacies sedimentary model was established. The microfacies included an underwater distributary channel, mouth bar, sand sheet, and interdistributary bay, and the horizontal and vertical distributions of the effective reservoir sandstone were determined. Then, using petrophysical experimental data, the macroscopic and microstructural characteristics of the reservoir rock were examined, and the type and composition characteristics of the sandstone, pores, and the connectivity between pores were evaluated. By employing mechanical experiments, it was found that the sandstone permeability change rate with pressure is very large, reaching as high as 50%. In addition, the relationship between the pressure and rock micropore structure change was established. Finally, based on the fine reservoir characterization, the potential of transforming DU6 reservoir into gas storage was evaluated, and the sealing properties of its faults, top caprocks, and surrounding water were identified. The effective pore volume for underground gas storage was determined quantitatively, and the utilization rates of pores were calculated according to different sedimentary microfacies. Overall, the available gas sand body volume of the DU6 gas reservoir was found to be 9048 × 10 4 m 3 , with a gas storage capacity reaching 99.27 × 10 8 m 3 . These results will provide reliable technical support for the successful reconstruction of underground gas storage areas.

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Section: Diagenesis and Pore Evolutionmentioning

confidence: 99%

Section: Effective Pore Volume Of Underground Gas Storagementioning

confidence: 99%

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confidence: 99%

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Estimating reservoir parameters and gas storage volume available in the DU6 gas field, Northeast China

Wang

2021

Int J Energy Res

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“…During the cyclic injection-production process, the permeability of the nonwetting phase decreases, and the copermeability zone of the two phases shrinks, which directly affects the injection-production ability and the capacity of the UGS [35]. Wang et al [36] took cores in the actual gas storage and conducted experiments to simulate the initial injection and subsequent multiple injection-production process, exploring the intrinsic relationships between reservoir capacity and pressure, and between reservoir capacity and injection and production rounds. Shao et al [37] studied the periodic changes in rock pore structure due to cyclic injection-production of underground gas storages.…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation of Phase Behavior of Condensate Gas and Crude Oil System in Underground Gas Storage

Tang

Min

et al. 2022

Lithosphere

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The phase behavior of reservoir fluids is crucial for the smooth operation of an underground gas storage (UGS). In this work, three experiments were conducted to investigate the phase behavior of condensate and crude oil systems within different development stages of gas storage in Bohai Bay Basin of eastern China. In stage 1, constant volume depletion (CVD) test was conducted to simulate the interaction of the original condensate gas-live oil system. In stage 2, the phase behavior of a series of mixtures of live oil with 47.5, 58.3, 69.9, and 77.4 mol% of condensate gas was studied by constant composition expansion (CCE) test. In stage 3, a new experiment was designed to study the mass transfer and phase behavior during cyclic injection-production process of the underground gas storage. The results from the CVD test describe the effect of each pressure stage on produced gas composition and equilibrium oil properties in the condensate crude oil system. The results of the CCE test indicate that condensate gas can expand the oil and improve the properties. The results of cyclic injection-production experiment demonstrate that the mass transfer in condensate gas and oil system is a dual mechanism of condensation and vaporization. With the increase of the cycle, the intermediate components of oil phase are enriched and the heavy components decreases. After four cycles, the oil and gas interphase mass transfer reaches dynamic equilibrium. In addition, test results show that multicycle operation is beneficial to improve the oil properties. This work is of great significance to understand the phase transition mechanism of underground gas storage, which provides a basis for other researchers to further update and improve the EOS model.

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“…Seismic attenuation is an important indicator for the identification of gasbearing hydrocarbons. The conventional method in gas-bearing prediction is to extract information on gas-sensitive seismic attributes from seismic data (Wang et al, 2020), for example, seismic attenuation attributes (Wang et al, 2016). Therefore, methods such as Fourier transform, wavelet transform, S transform, and synchronous compression wavelet transform (SCWT) are commonly used to conduct time-frequency analysis when locating gas in abnormal positions (Fawad et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

Hydrocarbon detection based on empirical mode decomposition, teager-kaiser energy, and the cepstrum

Jiang

Cao

et al. 2022

Front. Earth Sci.

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Seismic waves produce anomalies when they pass through hydrocarbons; these anomalies, which are commonly used to detect hydrocarbons, are manifested differently in different domains. Here, we propose a novel hydrocarbon detection method that combines Empirical Mode Decomposition (EMD), the Teager-Kaiser energy operator (TKEO), and the cepstrum. This method utilizes EMD’s ability to adaptively decompose signals, benefits from the TKEO’s superior performance regarding the focusing of instantaneous energy, and uses the sensitivity of cepstrum domain parameters to hydrocarbons. Here, applying the developed EMD-TKE-Cepstrum method to the Marmousi2 example revealed that it could describe the position and extent of hydrocarbons more clearly than the synchronous compression wavelet transform (SCWT) method. Applying the EMD-TKE-Cepstrum algorithm to field data further confirmed its potential regarding the identification of anomalies associated with hydrocarbon reservoirs.

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Quantitative characterisation of gas loss and numerical simulations of underground gas storage based on gas displacement experiments performed with systems of small-core devices connected in series

Cited by 22 publications

References 26 publications

Estimating reservoir parameters and gas storage volume available in the DU6 gas field, Northeast China

Estimating reservoir parameters and gas storage volume available in the DU6 gas field, Northeast China

Experimental Investigation of Phase Behavior of Condensate Gas and Crude Oil System in Underground Gas Storage

Hydrocarbon detection based on empirical mode decomposition, teager-kaiser energy, and the cepstrum

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