| Theoretical Comparison of Test Performance of Different Pulse Decay Methods for Unconventional Cores | |
Han GF(韩国锋)1 ; Liu XL2; Huang J2
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| Corresponding Author | Liu, Xiaoli([email protected]) |
| Source Publication | ENERGIES
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| 2020-09-01 | |
| Volume | 13Issue:17Pages:21 |
| Abstract | Various pulse decay methods are proposed to test tight cores. These methods can be divided into three types. This study compares the performance of these methods to test the permeability of unconventional cores in terms of homogeneous cores, dual-medium cores, and gas adsorption, including the pressure equilibrium time, possible errors caused by conventional analysis methods, and reflections on the characteristics of dual-media. Studies shows that the two test methods with an antisymmetric relationship in the boundary conditions have basically identical test performance. When testing homogeneous cores, regardless of whether the gas is adsorptive or not, the pressure equilibrium time of the first type of method is approximately half of that of the second type of method. The dual-medium parameters seriously affect the pressure equilibrium time of different methods, which may cause the difference of order of magnitude. For homogeneous cores, the permeability errors of the first and second types of methods caused by porosity errors are similar and larger than that of the third type of method. For dual media, the fracture permeability obtained by the third type of method using the conventional analysis method may differ from the actual value by tens of times. No method can significantly eliminate the sorption effect. When the core is a dual-medium, only the pressure curves of the upstream positive-pulse method, downstream negative-pulse method and one-chamber method can reflect the characteristics of dual media. The pressure derivative of the one-chamber method cannot reflect the characteristics of dual media at the early time. The pressure derivative of the second type and the upstream positive-pulse downstream negative-pulse method can reflect the complete characteristics of dual media, but their pressure derivative of the constant-slope segment is small, and the interporosity flow parameter may not be identified. |
| Keyword | pulse decay method gas adsorption dual media unconventional core |
| DOI | 10.3390/en13174557 |
| Indexed By | SCI ; EI |
| Language | 英语 |
| WOS ID | WOS:000571134500001 |
| WOS Keyword | MULTISCALE GAS-TRANSPORT ; DUAL-CONTINUUM MEDIUM ; PERMEABILITY ; SHALES ; ROCKS ; FLOW |
| WOS Research Area | Energy & Fuels |
| WOS Subject | Energy & Fuels |
| Funding Project | National Natural Science Foundation of China[11602276] ; National Key R&D Program of China[2018YFC1504801] ; National Key R&D Program of China[2018YFC1504902] |
| Funding Organization | National Natural Science Foundation of China ; National Key R&D Program of China |
| Classification | Q3 |
| Ranking | 1 |
| Contributor | Liu, Xiaoli |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/85301 |
| Collection | 流固耦合系统力学重点实验室 |
| Affiliation | 1.Chinese Acad Sci, Inst Mech, Beijing 100190, Peoples R China; 2.Tsinghua Univ, State Key Lab Hydrosci & Engn, Beijing 100084, Peoples R China |
| Recommended Citation GB/T 7714 | Han GF,Liu XL,Huang J. Theoretical Comparison of Test Performance of Different Pulse Decay Methods for Unconventional Cores[J]. ENERGIES,2020,13,17,:21.Rp_Au:Liu, Xiaoli |
| APA | 韩国锋,Liu XL,&Huang J.(2020).Theoretical Comparison of Test Performance of Different Pulse Decay Methods for Unconventional Cores.ENERGIES,13(17),21. |
| MLA | 韩国锋,et al."Theoretical Comparison of Test Performance of Different Pulse Decay Methods for Unconventional Cores".ENERGIES 13.17(2020):21. |
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| Jp2020328.pdf（7608KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | View Download | |
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