The experimental study of microwave heating on the microstructure of oil shale samples
Abstract The microstructure of oil shale plays a vital role in the seepage and production of shale oil and gas and can be modified by microwave irradiation. In this study, the experimental work aims to visualize and analyze the microstructure of oil shale under microwave heating with different heati...
Main Authors: | , , , , , |
---|---|
Format: | Article |
Language: | English |
Published: |
Wiley
2019-06-01
|
Series: | Energy Science & Engineering |
Subjects: | |
Online Access: | https://doi.org/10.1002/ese3.311 |
id |
doaj-33c6ab0e40234af0a620352f1963bf82 |
---|---|
record_format |
Article |
spelling |
doaj-33c6ab0e40234af0a620352f1963bf822020-11-25T01:28:15ZengWileyEnergy Science & Engineering2050-05052019-06-017380982010.1002/ese3.311The experimental study of microwave heating on the microstructure of oil shale samplesJingyi Zhu0Zhaozhong Yang1Xiaogang Li2Shuangyu Qi3Quantang Fang4Yi Ding5State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation Southwest Petroleum University Chengdu ChinaState Key Laboratory of Oil and Gas Reservoir Geology and Exploitation Southwest Petroleum University Chengdu ChinaState Key Laboratory of Oil and Gas Reservoir Geology and Exploitation Southwest Petroleum University Chengdu ChinaState Key Laboratory of Oil and Gas Reservoir Geology and Exploitation Southwest Petroleum University Chengdu ChinaState Key Laboratory of Oil and Gas Reservoir Geology and Exploitation Southwest Petroleum University Chengdu ChinaState Key Laboratory of Oil and Gas Reservoir Geology and Exploitation Southwest Petroleum University Chengdu ChinaAbstract The microstructure of oil shale plays a vital role in the seepage and production of shale oil and gas and can be modified by microwave irradiation. In this study, the experimental work aims to visualize and analyze the microstructure of oil shale under microwave heating with different heating parameters by traditional two‐dimensional (optical microscope and scanning electron microscope) and advanced three‐dimensional (micro‐CT) methods. Volumetric reconstructions of oil shale before and after microwave heating were completed to directly visualize the pore structure and fracture network of the samples. The similarities and differences between microwave heating and conventional heating were also investigated. Finally, based on the three‐dimensional CT data, the porosity and the degree of anisotropy of the samples were calculated. Traditional two‐dimensional imaging methods showed that microwave heating led to more pores and fractures due to the differential thermal stress caused by rapid heating, which differed from conventional heating. Porosity calculations based on the CT image data indicated that a long heating time and a high output power could lead to a large porosity value. Oil shale obtained by drilling horizontally into the bedding plane showed the largest porosity and lowest heterogeneity of pore distribution after heating and had a different fracture morphology. The results from this study are important for the exploitation of oil shale using microwave heating, and the application of these analytical techniques is useful for the evaluation of the flow behavior of transformation products.https://doi.org/10.1002/ese3.311efficiency enhancementmicro‐CTmicrostructuremicrowave heatingoil shale |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Jingyi Zhu Zhaozhong Yang Xiaogang Li Shuangyu Qi Quantang Fang Yi Ding |
spellingShingle |
Jingyi Zhu Zhaozhong Yang Xiaogang Li Shuangyu Qi Quantang Fang Yi Ding The experimental study of microwave heating on the microstructure of oil shale samples Energy Science & Engineering efficiency enhancement micro‐CT microstructure microwave heating oil shale |
author_facet |
Jingyi Zhu Zhaozhong Yang Xiaogang Li Shuangyu Qi Quantang Fang Yi Ding |
author_sort |
Jingyi Zhu |
title |
The experimental study of microwave heating on the microstructure of oil shale samples |
title_short |
The experimental study of microwave heating on the microstructure of oil shale samples |
title_full |
The experimental study of microwave heating on the microstructure of oil shale samples |
title_fullStr |
The experimental study of microwave heating on the microstructure of oil shale samples |
title_full_unstemmed |
The experimental study of microwave heating on the microstructure of oil shale samples |
title_sort |
experimental study of microwave heating on the microstructure of oil shale samples |
publisher |
Wiley |
series |
Energy Science & Engineering |
issn |
2050-0505 |
publishDate |
2019-06-01 |
description |
Abstract The microstructure of oil shale plays a vital role in the seepage and production of shale oil and gas and can be modified by microwave irradiation. In this study, the experimental work aims to visualize and analyze the microstructure of oil shale under microwave heating with different heating parameters by traditional two‐dimensional (optical microscope and scanning electron microscope) and advanced three‐dimensional (micro‐CT) methods. Volumetric reconstructions of oil shale before and after microwave heating were completed to directly visualize the pore structure and fracture network of the samples. The similarities and differences between microwave heating and conventional heating were also investigated. Finally, based on the three‐dimensional CT data, the porosity and the degree of anisotropy of the samples were calculated. Traditional two‐dimensional imaging methods showed that microwave heating led to more pores and fractures due to the differential thermal stress caused by rapid heating, which differed from conventional heating. Porosity calculations based on the CT image data indicated that a long heating time and a high output power could lead to a large porosity value. Oil shale obtained by drilling horizontally into the bedding plane showed the largest porosity and lowest heterogeneity of pore distribution after heating and had a different fracture morphology. The results from this study are important for the exploitation of oil shale using microwave heating, and the application of these analytical techniques is useful for the evaluation of the flow behavior of transformation products. |
topic |
efficiency enhancement micro‐CT microstructure microwave heating oil shale |
url |
https://doi.org/10.1002/ese3.311 |
work_keys_str_mv |
AT jingyizhu theexperimentalstudyofmicrowaveheatingonthemicrostructureofoilshalesamples AT zhaozhongyang theexperimentalstudyofmicrowaveheatingonthemicrostructureofoilshalesamples AT xiaogangli theexperimentalstudyofmicrowaveheatingonthemicrostructureofoilshalesamples AT shuangyuqi theexperimentalstudyofmicrowaveheatingonthemicrostructureofoilshalesamples AT quantangfang theexperimentalstudyofmicrowaveheatingonthemicrostructureofoilshalesamples AT yiding theexperimentalstudyofmicrowaveheatingonthemicrostructureofoilshalesamples AT jingyizhu experimentalstudyofmicrowaveheatingonthemicrostructureofoilshalesamples AT zhaozhongyang experimentalstudyofmicrowaveheatingonthemicrostructureofoilshalesamples AT xiaogangli experimentalstudyofmicrowaveheatingonthemicrostructureofoilshalesamples AT shuangyuqi experimentalstudyofmicrowaveheatingonthemicrostructureofoilshalesamples AT quantangfang experimentalstudyofmicrowaveheatingonthemicrostructureofoilshalesamples AT yiding experimentalstudyofmicrowaveheatingonthemicrostructureofoilshalesamples |
_version_ |
1725102812051800064 |